feat(playlist): load a playlist straight from its link (#160 )

`!playlist` already pulled a numeric id out of a URL, but the platform still came from flags, so a QQ link without -q was looked up on NetEase, and a YouTube ?list= link fell through to a name search on the URL. - Detect NetEase / QQ Music / YouTube playlist links (also inside an app's share text and the [URL] BBCode TeamSpeak adds) and take the platform from the link. - Follow NetEase (163cn.tv) and QQ (c6.y.qq.com/base/fcgi-bin/u) share short links one hop. Only those hosts are fetched. - Document it in the README command table. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Merge pull request #166 from xxmod/main
2026-10-02 04:52:50 +08:00 · 2026-09-27 21:41:05 +08:00 · 2026-09-27 21:12:25 +08:00 · 2026-09-22 17:10:54 +08:00 · 2026-08-31 16:22:36 +08:00 · 2026-08-25 18:27:22 +08:00
78 changed files with 11167 additions and 329 deletions
@@ -9,7 +9,7 @@
 </p>

 <p align="center">
-  <img src="https://img.shields.io/badge/Node.js-20+-339933?logo=nodedotjs&logoColor=white" />
+  <img src="https://img.shields.io/badge/Node.js-20%20%7C%2022%20LTS-339933?logo=nodedotjs&logoColor=white" />
  <img src="https://img.shields.io/badge/TypeScript-5-3178C6?logo=typescript&logoColor=white" />
  <img src="https://img.shields.io/badge/Vue-3-4FC08D?logo=vuedotjs&logoColor=white" />
  <img src="https://img.shields.io/badge/许可证-MIT-green" />
@@ -31,7 +31,8 @@
 - **WebUI 鉴权与细粒度权限（必选）** — 用户名 + 密码登录，多用户、两种角色（管理员 / 成员）；成员可进一步配置**细粒度能力**（播放控制 / 队列管理 / 机器人管理 / 平台登录 / 音质）和**按机器人授权白名单**，所有变更操作由后端逐请求强制校验。bcrypt 加密、HttpOnly 会话 Cookie，CSRF 防护，WebSocket 同样鉴权。首次访问引导创建管理员。从无鉴权旧版本升级时请参阅 [更新升级](#更新升级) 章节
 - **游客模式（免登录点歌，默认关闭）** — 管理员可选择允许访客**无需账号密码**进入 WebUI 点歌，并逐项配置游客权限（8 个开关，默认仅「添加到队列末尾」开启）与可控机器人白名单；游客无法查看 / 修改任何设置、管理机器人或访问用户管理。开启后登录页出现 **「以游客身份进入」**。详见下文 **「游客模式 / Guest mode」** 小节
 - **本地收藏歌单** — 在首页 / 搜索 / 歌单页一键收藏，收藏内容按用户存储，登录后跨设备同步
- **本地音频上传播放** — 在搜索页拖拽或选择本地音频上传，上传后可直接播放 / 下一首播放 / 加入队列；管理员可在 设置 → 行为设置 开关此功能，播放结束或停止/清空/替换队列时会清理服务端接收的本地文件
+- **保存/加载播放清单 + 重启后自动恢复队列（可选，默认关闭）** — 管理员在 设置 → 行为设置 开启后，可在网页「已存队列」页或聊天命令（`!save` / `!load` / `!queues`）把当前队列保存为清单，随时**替换**加载或**追加**到队列末尾；同时机器人重启后会自动恢复并继续播放上次的队列。网页保存可选「共享」，聊天保存进入共享清单。**说明**：重启只能从当前曲目的开头恢复（不记忆播放进度）；Spotify 自动恢复为尽力而为（依赖 sidecar 可用）。详见 [使用说明](#使用说明)
+- **本地音视频上传播放** — 在搜索页拖拽或选择本地文件上传，音频（mp3 / flac / wav / m4a / ogg / opus 等）和视频（mp4 / mov / avi / mkv / flv / wmv 等）都支持，视频上传后只保留其中的音轨；上传后可直接播放 / 下一首播放 / 加入队列；管理员可在 设置 → 行为设置 开关此功能，播放结束或停止/清空/替换队列时会清理服务端接收的本地文件
 - **专属链接（单机器人锁定）** — 通过 `/bot/<id>` 专属链接打开 WebUI 时锁定到单个机器人，刷新后保持，适合把某台机器人的控制页分享给特定用户
 - **频道无人时自动暂停** — 机器人所在频道没有其他人时自动暂停播放，有人加入后自动恢复（**默认关闭**，可在设置中开启）
 - **Jellyfin 音源（可选）** — 连接自建 [Jellyfin](https://jellyfin.org/) 服务器作为额外音源：搜索（歌曲 / 专辑 / 歌单）、懒解析直传播放、同步歌词、收藏 Instant Mix 电台（`!fm -j`）、首页「最近添加 / 播放最多 / 收藏 / 流派」，并把播放进度回报给 Jellyfin（PlayCount / 播放状态）。**默认关闭**，在 设置 → Jellyfin 音乐库 一键开启。详见 [可选：Jellyfin 音源](#可选jellyfin-音源)
@@ -61,20 +62,25 @@

 ### 方式一：Windows 一键部署（最简单）

-只需电脑有网络连接，其他一切自动安装。
+先装好 Node.js，其余依赖（含内置 FFmpeg）全部自动安装。

 ```
-1. 下载或 clone 本项目
-2. 双击 scripts\setup.bat      （首次安装，自动安装 Node.js 和所有依赖）
-3. 双击 scripts\start.bat      （启动机器人）
-4. 浏览器打开 http://localhost:3000
+1. 安装 Node.js 22 LTS（https://nodejs.org/ 或 https://nodejs.cn/）
+2. 下载或 clone 本项目
+3. 双击 scripts\setup.bat      （安装依赖并构建，不含 Node.js 本身）
+4. 双击 scripts\start.bat      （启动机器人）
+5. 浏览器打开 http://localhost:3000
 ```

-> `setup.bat` 会自动通过 winget 安装 Node.js（如果未安装），运行 `npm install` 安装所有依赖（包括内置 FFmpeg），最后构建项目。之后每次只需双击 `start.bat` 启动。
+> **先装 Node.js 22 LTS**（[nodejs.org](https://nodejs.org/) / 国内镜像 [nodejs.cn](https://nodejs.cn/)）。`setup.bat` 检测到没装 Node 时会给出下载地址并退出，不会替你安装。
+>
+> 之后 `setup.bat` 会运行 `npm install` 安装所有依赖（包括内置 FFmpeg），按当前 Node 版本准备好原生模块，最后构建项目。之后每次只需双击 `start.bat` 启动。
+>
+> **Node 20 已不再支持**：better-sqlite3 从 12.10.0 起不再发布它那个 ABI（115）的预编译包，装起来必须先备好 Python + C++ 构建工具（[#152](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/152)）。Node 24 及更新的大版本能用，但 @discordjs/opus 0.10.0 同样没有 Node 24（ABI 137）的预编译包，安装脚本会改用源码编译，需要构建工具且耗时更久——所以推荐 22 LTS。**装好之后不要再换 Node 大版本**：原生模块只能在编译它的那个版本上加载，换版本后必须重新运行 `setup.bat`（脚本会自动检测并重装，见下方常见问题）。

 ### 方式二：手动安装（所有系统）

-**前置条件：** [Node.js 20+](https://nodejs.org/) 和一个 TeamSpeak 服务器（TS3/TS5/TS6 均可）。
+**前置条件：** [Node.js 22 LTS](https://nodejs.org/)（Node 24 及更新版本也能用，但需要源码编译原生模块；Node 20 已不再支持）和一个 TeamSpeak 服务器（TS3/TS5/TS6 均可）。
 FFmpeg **已自动内置**，无需手动安装。

 ```bash
@@ -329,7 +335,8 @@ sudo systemctl start tsmusicbot
 | **歌单** | 查看歌单详情，播放全部（根据当前播放模式选择首歌），一键收藏 |
 | **歌词** | 全屏歌词页，实时同步滚动，模糊专辑封面背景 |
 | **历史** | 播放历史记录 |
-| **设置** | 账户（修改自己密码） / 主题切换 / 机器人管理 / 行为设置（空闲超时、频道无人自动暂停） / 多平台账号登录（网易云 / QQ / 酷狗 / B站） / 音质选择 / 命令前缀 / 用户管理（仅管理员，含成员能力与机器人白名单）/ 操作审计（仅管理员） |
+| **已存队列** | 保存当前队列为清单、加载（替换）/ 追加 / 删除已保存清单（仅在管理员开启「保存/加载播放清单」后出现） |
+| **设置** | 账户（修改自己密码） / 主题切换 / 机器人管理 / 行为设置（空闲超时、频道无人自动暂停、保存/加载播放清单、单曲直接播放不清空队列） / 多平台账号登录（网易云 / QQ / 酷狗 / B站） / 音质选择 / 命令前缀 / 用户管理（仅管理员，含成员能力与机器人白名单）/ 操作审计（仅管理员） |

 ### TeamSpeak 文字命令

@@ -346,8 +353,8 @@ sudo systemctl start tsmusicbot
 | `!play -y <关键词>` | 从 YouTube 搜索并播放（需要安装 [yt-dlp](#可选youtube-音源)）|
 | `!search <歌名> [-j\|-n\|-q\|-k\|-b\|-y]` | 列出前若干个匹配结果（含序号与 id），用于挑选同名歌曲；可加平台标志切换音源 |
 | `!play #<序号>` | 播放上一次 `!search` 结果中的第 N 项（区分同名歌曲） |
-| `!play id:<id>` | 按歌曲 id 播放精确的某首歌（也支持直接粘贴网易云 / QQ / B站 歌曲链接；Jellyfin 曲目用 GUID ItemId） |
-| `!add <歌名>` | 添加到播放队列（同样支持 `#序号` / `id:<id>` / 链接） |
+| `!play id <id>` | 按歌曲 id 播放精确的某首歌（也支持直接粘贴网易云 / QQ / B站 歌曲链接；Jellyfin 曲目用 GUID ItemId）。旧写法 `!play id:<id>` 仍然可用 |
+| `!add <歌名>` | 添加到播放队列（同样支持 `#序号` / `id <id>` / 链接） |
 | `!pause` / `!resume` | 暂停 / 恢复播放 |
 | `!next` / `!prev` | 下一首 / 上一首 |
 | `!stop` | 停止播放并清空队列 |
@@ -357,6 +364,7 @@ sudo systemctl start tsmusicbot
 | `!mode <seq\|loop\|random\|rloop>` | 切换播放模式 |
 | `!playlist <歌单名或ID>` | 加载歌单（支持名称模糊搜索和 ID；Jellyfin 歌单 GUID 也可直接粘贴） |
 | `!playlist -q <歌单名>` | 从 QQ 音乐搜索并加载歌单 |
+| `!playlist <歌单链接>` | 直接粘贴网易云 / QQ 音乐 / YouTube 歌单链接加载，平台由链接自动识别，无需加 `-q` 等标志；也可直接粘贴 App 的分享文案或短链（`163cn.tv`、`c6.y.qq.com`） |
 | `!album <专辑名或ID>` | 加载专辑（支持名称搜索 / 数字 ID / Jellyfin GUID） |
 | `!artist <歌手名>` | 按歌手循环播放（支持 `-j`/`-n`/`-q`/`-k`/`-b`/`-y`） |
 | `!fm` | 私人 FM（默认网易云，自动续播） |
@@ -367,9 +375,14 @@ sudo systemctl start tsmusicbot
 | `!now` | 当前播放信息 |
 | `!vote` | 投票跳过当前歌曲 |
 | `!move <频道名>` | 移动到指定频道 |
+| `!save <名称>` | 保存当前队列为一份已保存清单（需启用「保存/加载播放清单」，聊天保存进入共享清单） |
+| `!load [-a] <名称>` | 加载已保存清单（默认替换当前队列并播放；加 `-a` 追加到队列末尾） |
+| `!queues` | 列出已保存（共享）清单 |
 | `!help` | 显示帮助信息 |

 > 命令前缀默认为 `!`，可在设置页面修改。支持别名：`!p` = `!play`，`!s` = `!skip`，`!n` = `!next`
+>
+> `!save` / `!load` / `!queues` 仅在管理员开启「保存/加载播放清单」后可用（默认关闭），未启用时回复「此功能未启用」。

 ### TeamSpeak 命令权限（管理类命令限制）

@@ -414,6 +427,20 @@ sudo systemctl start tsmusicbot

 在设置页面选择音质，立即生效（影响后续播放的歌曲）。

+> **重启后保留（#125）**：音质选择会持久化到 `data/config.json`（每个平台各自记录），重启机器人后自动恢复，无需每次手动重设。
+
+### 重启后保留的播放设置
+
+以下运行时设置在改动时自动落盘，重启机器人后自动恢复，不再回到默认值：
+
+| 设置 | 作用范围 | 存储位置 |
+|------|----------|----------|
+| **播放音量**（`!vol` / WebUI 音量条 / REST `/volume`） | 每个机器人独立 | 数据库 `bot_instances.volume` |
+| **播放模式**（`!mode` / WebUI / REST `/mode`：顺序 / 列表循环 / 随机 / 随机循环） | 每个机器人独立 | 数据库 `bot_instances.play_mode` |
+| **音质**（各平台，WebUI 设置页 / REST `/quality`） | 全局（各平台各自记录） | `data/config.json` 的 `audioQuality` |
+
+聊天命令、WebUI、REST API 三种入口的改动都会被持久化。播放队列、当前歌曲、进度、`!fm` / `!artist` 等临时播放状态仍为一次性状态，重启后不保留（`!fm` / `!artist` 内部临时切换的随机 / 循环也**不会**覆盖你用 `!mode` 显式保存的偏好）。
+
 ## 项目架构

 ```
@@ -484,7 +511,7 @@ teamspeak-music-bot/

 | 层级 | 技术 |
 |------|------|
-| **运行时** | Node.js 20+, TypeScript 5 |
+| **运行时** | Node.js 22 LTS（推荐）, TypeScript 5 |
 | **后端框架** | Express 4, WebSocket (ws) |
 | **数据库** | better-sqlite3 (SQLite) |
 | **音频处理** | FFmpeg (ffmpeg-static 内置), @discordjs/opus |
@@ -543,7 +570,7 @@ teamspeak-music-bot/
 - **电台 / FM**（`!fm -j` 或首页「Jellyfin 电台」卡片）— 随机取一首**收藏**做种子生成 Instant Mix 歌曲流；没有收藏则回退到最近播放、再回退随机曲目
 - **首页区块** — 最近添加（专辑）/ 播放最多 / Jellyfin 收藏 / 我的歌单 / 流派（点流派芯片即播放该流派）
 - **播放上报** — 播放开始 / 进度（约 10s 一次）/ 停止会回报给 Jellyfin（`Sessions/Playing` 系列接口），你的 Jellyfin 播放统计（PlayCount、最近播放）保持准确；上报失败不影响播放
- **聊天命令** — 启用后用 `-j` 标志：`!play -j <歌名>`、`!fm -j`、`!artist -j <歌手>`；`!playlist` / `!album` / `!play id:` 可直接粘贴 Jellyfin GUID。若把在线音源全部停用、只保留 Jellyfin，不带标志的命令会自动以 Jellyfin 为默认音源
+- **聊天命令** — 启用后用 `-j` 标志：`!play -j <歌名>`、`!fm -j`、`!artist -j <歌手>`；`!playlist` / `!album` / `!play id <id>` 可直接粘贴 Jellyfin GUID。若把在线音源全部停用、只保留 Jellyfin，不带标志的命令会自动以 Jellyfin 为默认音源

 ### enabledProviders：音源开关

@@ -551,9 +578,10 @@ teamspeak-music-bot/

 - 可选值：`jellyfin`、`netease`、`qq`、`bilibili`、`youtube`、`kugou`（`local` 由 `localAudioEnabled` 控制，`spotify` 由 `spotify.enabled` 控制）
 - 未列出的音源：聊天命令返回「音源未启用」、REST 返回 400、WebUI 搜索栏 / 登录卡 / FM 卡片自动隐藏
- 不带平台标志的命令走**固定优先级中第一个已启用的音源**：网易云 → QQ → 酷狗 → Jellyfin → B站 → YouTube（默认配置下即网易云）
+- 不带平台标志的命令默认走**固定优先级中第一个已启用的音源**：网易云 → QQ → 酷狗 → Jellyfin → B站 → YouTube（默认配置下即网易云）
+- **自定义默认音源（`defaultPlatform`）** — 想让不带标志的 `!play 歌名` 直接用某个音源（例如常听哔哩哔哩，免去每次加 `-b`），可在 设置 → 默认音源 里选择，或在 `config.json` 中设置 `"defaultPlatform": "bilibili"`。取值须是 `enabledProviders` 里已启用的音源，否则被忽略（回退到上面的固定优先级）；留空 / `null` / 删除该字段即恢复固定优先级。WebUI 保存后即时生效，无需重启
 - 网易云 / QQ 停用时，其内嵌 API 服务（端口 3001 / 3200）**不会启动**
- 示例（Jellyfin 为主、只留网易云备用）：`"enabledProviders": ["jellyfin", "netease"]`（此时默认音源仍为网易云，点歌用 `-j` 或停用网易云）；示例（纯 Jellyfin）：`"enabledProviders": ["jellyfin"]`
+- 示例（Jellyfin 为主、只留网易云备用）：`"enabledProviders": ["jellyfin", "netease"]`（默认音源仍为网易云，点歌用 `-j`、停用网易云，或直接把 `defaultPlatform` 设为 `"jellyfin"`）；示例（纯 Jellyfin）：`"enabledProviders": ["jellyfin"]`
 - 注意：重新启用网易云 / QQ 的内嵌 API 服务需要重启机器人；其余音源改动即时生效（WebUI 的 Jellyfin 开关即改此列表）

 ## 可选：YouTube 音源
@@ -775,11 +803,14 @@ A：支持。本项目内置 TS3/TS6 双协议支持，连接时会自动检测
 **Q：机器人连接了但 TeamSpeak 中听不到音乐？**
 A：确保机器人和你在同一个频道。检查音量（`!vol 75`）。部分 VIP 歌曲需要先登录账号。

+**Q：启动报 `NODE_MODULE_VERSION 137 ... requires 127`，或提示找不到 `opus.node`？**
+A：换过 Node 大版本了。原生模块（`@discordjs/opus`、`better-sqlite3`）编译时绑定了一个 Node ABI（Node 20 = 115、22 = 127、24 = 137），换版本后旧的 `.node` 就再也加载不了。**重新运行一次 `scripts\setup.bat`（Linux/macOS 是 `bash scripts/setup.sh`）即可**——安装脚本会实际加载一遍每个原生模块，发现和当前 Node 不匹配就自动重新下载/编译，替换过程中失败也会把原来的文件还原回去。`start.bat` 和 `npm start` 在启动前也会先做这个检查，直接告诉你哪个模块对不上、分别是哪个 ABI，而不是抛一串看不懂的堆栈。想彻底重来就删掉 `node_modules` 和 `web\node_modules` 再跑一次 `setup.bat`。
+
 **Q：提示"无法获取播放链接"？**
 A：在设置页面扫码登录音乐账号。许多歌曲需要登录后才能播放。

 **Q：同名歌曲 `!play` 只能播到最热门的那首，怎么播放指定的版本？**
-A：`!play <歌名>` 默认取最热门的匹配项。要播放同名的另一首，有三种方式：(1) 先 `!search <歌名>` 列出带序号的结果，再 `!play #序号` 选择；(2) `!play id:<歌曲id>` 按 id 精确播放；(3) 直接粘贴歌曲链接，如 `!play https://music.163.com/song?id=442867526`（也支持 QQ / B站 链接）。在 WebUI 中则可直接在搜索结果列表里点选任意同名歌曲。
+A：`!play <歌名>` 默认取最热门的匹配项。要播放同名的另一首，有三种方式：(1) 先 `!search <歌名>` 列出带序号的结果，再 `!play #序号` 选择；(2) `!play id <歌曲id>` 按 id 精确播放（`!search` 结果里每行末尾的 `[id:...]` 就是它）；(3) 直接粘贴歌曲链接，如 `!play https://music.163.com/song?id=442867526`（也支持 QQ / B站 链接）。在 WebUI 中则可直接在搜索结果列表里点选任意同名歌曲。

 **Q：如何更换机器人所在频道？**
 A：使用 `!move <频道名>` 命令，或在设置页面创建机器人时指定默认频道。
@@ -788,10 +819,13 @@ A：使用 `!move <频道名>` 命令，或在设置页面创建机器人时指
 A：可以。在设置页面创建多个实例，分别连接不同的 TS 服务器或频道。

 **Q：端口 3200 被占用？**
-A：QQ 音乐 API 启动时自动监听 3200 端口。如果之前的进程还在运行，程序会自动复用。如需重启可手动结束 `node` 进程。
+A：QQ 音乐 API 启动时会监听 `config.json` 里的 `qqMusicApiPort`（默认 **3200**），客户端也用同一个端口发请求，二者始终一致。如果之前的进程还在运行，程序会自动复用。如需改端口，改 `qqMusicApiPort` 后重启即可；如需重启可手动结束 `node` 进程。
+
+**Q：日志里 `baseURL` 是 3200，但 QQ API 实际监听在 3300？（二维码不弹）**
+A：这是**旧版本**（或过期的 `latest` Docker 镜像）才有的问题：早期实现用的上游包默认端口是 3300，而客户端 `baseURL` 已经是 3200，两边对不上，取二维码时就 `ECONNREFUSED 127.0.0.1:3200`。当前版本已把内嵌 QQ 音乐 API **强制绑定到 `qqMusicApiPort`（默认 3200）**，并在启动前把上游包读取的 `PORT` 环境变量对齐到该端口，二者不可能再错位。修复方法：**拉取最新镜像并重启**（`docker compose pull && docker compose up -d`），或用 `npm ci && npm run build` 更新到最新代码。启动后可在日志里确认那行 `QQ Music API started`，其 `port` 字段就是实际监听端口。

 **Q：QQ 音乐二维码不弹 / 扫码登录失败 / cookie 无法使用？**
-A：通常是内置的 QQ 音乐 API 服务没起来——它一旦没监听 3200 端口，机器人去取二维码就会拿到 `ECONNREFUSED 127.0.0.1:3200`，于是二维码不显示，登录和 cookie 也全失效。先看日志里 QQ API 的启动报错：
+A：通常是内置的 QQ 音乐 API 服务没起来——它一旦没监听 `qqMusicApiPort`（默认 3200）端口，机器人去取二维码就会拿到 `ECONNREFUSED 127.0.0.1:3200`，于是二维码不显示，登录和 cookie 也全失效。先看日志里 QQ API 的启动报错：
 - 报 `ERR_REQUIRE_ESM`：装到了不兼容的 `@sansenjian/qq-music-api` 版本。本项目把它锁在 **`~2.4.0`**（需要 **Node ≥ 20.17 / 22.9**）；务必用 `npm ci` 或 `npm install` 让版本与锁文件一致，**不要**手动 `npm update` 把它升级或降级到不兼容的中间版本（2.3.0/2.3.1 是纯 ESM、会触发此错）。
 - 报 Node 版本不满足：升级 Node 到 ≥ 20.17，或将该依赖降到 `~2.2.10`（无此 Node 要求）后重装。
 修好版本后重新 `npm install && npm run build` 并重启即可。
@@ -851,7 +885,92 @@ A：本项目内置 `/login` 限流（每 IP 每分钟 5 次），但生产部

 > 完整历史请查看 [git log](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/commits/main) 或 [Releases](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/releases)。这里只列出重要变更和面向用户的破坏性改动。

-### 最新版本 — Jellyfin 可选音源
+### 最新版本 — v1.13.0：本地视频上传播放 / 头像上传时机
+
+处理了 2 个社区反馈的 issue。**没有配置变化，升级无需任何操作**；原有的本地音频上传行为完全不变。
+
+**本地视频上传播放（[#149](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/149)，[PR #151](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/151)，感谢 [@LadenceE](https://github.com/LadenceE)）**
+
+- 搜索页的本地上传现在也收**视频文件**：mp4 / mov / avi / mkv / flv / wmv / m4v / mpg / mpeg / 3gp / ts / m2ts / ogv。上传后当普通歌曲用——直接播放、下一首播放、加入队列都一样。
+- 视频**只保留音轨**：上传后立刻把音频流原样搬进一个音频容器（不重编码、无损），再删掉原视频。720p 素材实测落盘只剩原文件的 14%，不然十几个视频就把 5 GiB 的上传目录配额占满了。
+- 没有音轨的视频会在**上传时**就被拒绝并说明原因，而不是排进队列后静默跳过。
+- 单文件上限从 200 MB 提到 **500 MB**；超限时的报错从 Express 默认的 HTML 错误页（带堆栈和服务器绝对路径）换成正常的中文提示，浏览器端也会在开传前就拦下超大文件。
+- 上传进度按文件显示百分比，传完切到「服务端处理中」——视频比音频大得多，原先那句静止的「正在上传」看着像卡死。
+- 说明：这里做的是「把你本地磁盘上的文件传上来播放」。让机器人直接读取**服务器**磁盘上任意路径的文件没有做——那等于开一个全盘任意文件读取的口子，而「播放服务器上已有的媒体库」用 Jellyfin 音源即可。
+
+**初始化阶段不再发起注定失败的头像上传（[#148](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/148)，[PR #150](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/150)，感谢 [@shenmu-rua](https://github.com/shenmu-rua)）**
+
+- 机器人构造阶段读出已保存的自定义头像后会立刻发起文件传输，但那时 TeamSpeak 还没连上，这次传输必定失败。现在构造阶段只把头像数据装入内存，实际上传交给连接成功后的 `onConnect()`。
+- **影响范围说明**：头像本身一直是能正常显示的（连接成功后本来就会重新应用一次），所以这不是「头像丢了」。真正的代价是每次启动 / 重启都会多一次注定失败的请求和一条 `Profile update failed` 警告日志——现在没有了。
+- 顺带修掉一个边角：头像文件写到一半崩溃会留下 0 字节文件，原先这会再触发两个同样注定失败的请求。
+
+### v1.12.0：网站图标 / 移动端交互 / 安装脚本按 ABI 自愈
+
+一次性处理了 6 个社区反馈的 issue。**没有配置变化，升级无需任何操作**；`!play id:<id>` 等旧写法全部继续可用。
+
+**安装脚本按 Node ABI 校验并自动修复（[#140](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/140)，[PR #147](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/147)，感谢 [@zbn297427669](https://github.com/zbn297427669)）**
+
+- 换过 Node 大版本后启动报 `NODE_MODULE_VERSION 137 ... requires 127`、或提示找不到 `opus.node` 的问题已修复。原生模块只能在编译它的 Node ABI 上加载，而旧脚本只检查「文件存在且够大」，会把给另一个 Node 版本编译的二进制原样留下。
+- 现在安装脚本会在子进程里真的加载一遍每个原生模块，不匹配就按当前 ABI 重新安装；替换过程先备份再原子替换，任何一步失败都会把原文件逐字节还原，不会让环境变得更糟。被中断留下的备份，下次运行自动认领回来。
+- 必需模块失败会**中止安装并返回非零**，不再出现「setup 显示成功、start 才爆炸」；下载进度实时显示在控制台，不再让人以为卡死。
+- `start.bat` 和 `npm start` 启动前会预检，直接说清楚哪个模块对不上、分别是哪个 ABI、怎么修。
+- 顺带修掉一个会**静默丢掉 ffmpeg** 的问题：源码编译会阻塞事件循环，把同时进行的 80MB ffmpeg 下载误判为超时，而 ffmpeg 是可选模块，于是安装照样报告成功、用户却放不出任何声音。三个模块改为串行处理。
+- Node 版本要求按依赖真实下限判断（20.19+ / 22.12+），推荐 20 或 22 LTS；更新的大版本不阻止，只提示可能需要源码编译。
+
+**随机模式下 `!pn` 真正下一首播放（[#141](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/141)，[PR #144](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/144)，感谢 [@XuVIIJay](https://github.com/XuVIIJay)）**
+
+- 随机 / 随机循环下 `!pn`（以及 WebUI 的「下一首播放」）插入的歌只是和其他歌一样等着被随机抽中，机器人却回复「Up next」。现在会真的下一首播放，连续插入多首时的顺序与队列里显示的一致。
+- 同时修掉两个相关问题：插入或删除队列中的歌之后，待播位置可能指向另一首歌；删得多了甚至会让播放**静默停止**。
+
+**WebUI 站点图标与移动端交互（[#142](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/142) / [#143](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/143) / [#138](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/138)，[PR #146](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/146)，感谢 [@XuVIIJay](https://github.com/XuVIIJay) 与 [@hak5ya](https://github.com/hak5ya)）**
+
+- 新增站点图标：收藏网页、移动端添加到主屏幕都会显示图标（含 iOS 与 Android 适配）。
+- 移动端迷你播放器的进度条现在**可以点按和拖动调节进度**，触摸区域也放大到可用尺寸，拖动时不会被自动跳转到歌词页。
+- 移动端**单击歌曲行即可播放**（桌面端双击行为不变）；队列抽屉里的歌曲行同样支持，其移除按钮在触屏下不再是「看不见但点得到」。
+- QQ 扫码登录的提示改为「请使用手机QQ扫码」——那是 QQ 账号二维码，用 QQ音乐 APP 扫不出来。
+
+**`!play id <id>` 与其他命令语法统一（[#139](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/139)，[PR #145](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/145)，感谢 [@hak5ya](https://github.com/hak5ya)）**
+
+- 按 id 播放现在可以写成 `!play id <id>`，和其他命令的 `<命令> <子命令> <参数>` 形式一致；`!add` / `!playnext` 同样适用。
+- **旧写法 `!play id:<id>` 继续支持**。空格写法只在参数确实像 id 时生效，普通搜索和粘贴链接的行为不受影响。
+
+### v1.11.2 — 可配置语音闪避
+
+- 检测频道内其他人说话时平滑降低音乐音量，停止后平滑恢复；默认关闭，可在设置页启用并调节说话时保留的音量比例（[#136](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/136)，[PR #137](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/137)）。
+
+### v1.11.1：修复 `!help` 触发机器人自动点歌
+
+**丢弃自回显消息（[PR #135](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/135)，感谢 [@EvolvedGhost](https://github.com/EvolvedGhost)）**
+
+- 修复输入 `!help` 后机器人会自己点一首歌开始播放的问题：帮助文本超过 TeamSpeak 单条消息上限被分段发送，而 TeamSpeak 会把 bot 自己发到频道的消息回推给它自己，第二段恰好以 `!artist ...` 开头，被误当作新命令解析执行。
+- 现在在协议层丢弃发送者为机器人自身的消息，机器人不再响应任何自己发出的文本，所有超长分段输出均安全。无配置变化，升级无需任何操作。
+
+### v1.11.0 — 播放清单持久化 / 设置保留 / 自定义默认音源
+
+**保存/加载播放清单 + 队列持久化（[#119](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/119)）——三项开关均默认关闭，升级无行为变化**
+
+- **保存/加载播放清单（`savedQueuesEnabled`，默认关闭，管理员开关）**：开启后，可在网页「已存队列」页或聊天命令保存当前队列为清单、随时**替换**加载或**追加**到队列末尾。网页保存可选「共享」（否则私有到当前用户）；聊天命令始终进入共享清单。新增聊天命令 `!save <名称>` / `!load [-a] <名称>` / `!queues`（未启用时回复「此功能未启用」）。上限：每个所有者 ≤ 50 份清单，每份 ≤ 1000 首。
+- **重启后自动恢复并继续播放队列**（同由 `savedQueuesEnabled` 门控）：机器人连接后会恢复上次的队列并继续播放。**说明**：只能从当前曲目的**开头**恢复（不记忆播放进度，链接重新解析）；**Spotify 恢复为尽力而为**（依赖 sidecar 重新可用），其他音源可靠。
+- **单曲直接播放不清空队列（`playKeepsQueue`，默认关闭，独立开关）**：开启后，直接播放单曲会插入到当前歌曲之后并立即播放、播完继续原队列，而不是清空整个队列。仅影响单曲的「直接播放」；歌单 / 专辑 / 电台仍会替换队列。
+- 三项均在 设置 → 行为设置 中开关，保存即时生效，无需重启。
+
+**重启后保留播放设置（[#125](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/125)）**
+
+- **音量与播放模式**现按机器人持久化到数据库（`bot_instances` 表新增 `volume` / `play_mode` 列，自动迁移），**各平台音质**持久化到 `config.json` 的 `audioQuality` 字段；重启后自动恢复，不再需要每次手动重调。
+- 聊天命令、WebUI、REST 三种入口的改动都会落盘；`!fm` / `!artist` 的临时随机 / 循环切换**不会**覆盖你用 `!mode` 显式保存的偏好。播放队列、当前歌曲与播放进度仍不持久化（队列恢复见上方 `savedQueuesEnabled`）。
+
+**自定义默认音源（[#126](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/126)）**
+
+- `config.json` 新增可选字段 `defaultPlatform`，或在 **设置 → 默认音源** 下拉选择：设定后，不带平台标志的 `!play` / `!search` / `!fm` 走你指定的音源（例如设为 `bilibili` 后点播 B 站视频音乐无需每次加 `-b`）。
+- 留空 / `null` 恢复原有固定优先级（网易云 → QQ → 酷狗 → Jellyfin → B 站 → YouTube）；若指定音源未启用或值非法，自动回退到优先级，保存即时生效、无需重启。
+
+**修复与加固**
+
+- **QQ 音乐 API 端口对齐（[#122](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/122)）**：内嵌 QQ 音乐 API sidecar 现在保证绑定到 `qqMusicApiPort`（与客户端请求端口一致），启动日志改为打印**实际绑定端口**便于排查。若你在旧 `latest` 镜像上遇到「日志里 baseURL 是 3200、服务却在 3300」导致二维码不显示，请 `docker compose pull` 重新拉取镜像。
+- **WebUI 不再被搜索引擎收录（[#128](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/128)）**：所有响应加 `X-Robots-Tag: noindex, nofollow`、新增 `/robots.txt`（Disallow 全站）、页面加 `robots` meta 标签。⚠️ 这只是阻止**收录**，不是访问控制——公网部署请务必依赖登录鉴权与反向代理，并且不要把自己的 WebUI 链接发到公开网页。
+- **`.gitignore` 补充 `.claude/`（[#127](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/127)，感谢 [@ItsEricRao](https://github.com/ItsEricRao)）**：本地 Claude Code 配置不再被误提交（已从版本库取消跟踪，本地文件不受影响）。
+
+### v1.10.1 — Jellyfin 可选音源

 **Jellyfin 集成（[PR #123](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/pull/123)，由 [@ItsEricRao](https://github.com/ItsEricRao) 贡献；随后调整为可选音源）**

@@ -891,6 +1010,7 @@ A：本项目内置 `/login` 限流（每 IP 每分钟 5 次），但生产部
 - **会话存储**：服务端 SQLite 表 `sessions`，存储 sha256(token)；浏览器只持有原始 token cookie。7 天 TTL，每小时滚动续期。同账号最多 10 个并发会话（超出剔除最旧）。
 - **登录限流**：每 IP 每分钟 5 次 `/login` + 3 次 `/setup`，命中返回 429 + `Retry-After`。
 - **CSRF & 安全头**：所有 mutating 请求强制 `Origin`/`Referer` 同源；响应携带 `X-Frame-Options: DENY` 和 `Content-Security-Policy: frame-ancestors 'none'`（防点击劫持）。
+- **搜索引擎隐身（防止实例被收录，issue #128）**：为避免部署实例的 WebUI 被搜索引擎收录、被陌生人搜到控制页，采用纵深防御——所有响应携带 `X-Robots-Tag: noindex, nofollow`，`/robots.txt` 返回 `User-agent: * / Disallow: /`，`index.html` 内置 `<meta name="robots" content="noindex, nofollow">`（专属链接 `/bot/<id>` 等所有页面同样覆盖）。这些只阻止「被索引」，不是访问控制——**请不要把自己的 WebUI 链接发到公开网页 / 论坛 / 聊天群**，真正的防护来自登录鉴权与反向代理。
 - **配置变更**：反向代理部署务必 `"trustProxy": true`（详见 [反向代理部署注意事项](#反向代理部署注意事项)）。`config.adminGroups` 现已启用，用于限制管理类聊天命令只能由指定 TeamSpeak 服务器组运行（为空 = 不限制，详见 [TeamSpeak 命令权限](#teamspeak-命令权限管理类命令限制)）；`config.adminPassword` 仍为旧版预留字段，保留以兼容旧 `config.json`，当前未使用。

 ### v0.x — Bot Profile 自动更新与协议层升级
@@ -0,0 +1,227 @@
+# Save/Load Playlists + Queue Persistence — Design
+
+**Issue:** [#119](https://github.com/ZHANGTIANYAO1/teamspeak-music-bot/issues/119) — 加入保存和加载播放清单功能
+**Date:** 2026-07-06
+**Status:** Approved (design), pending implementation plan
+
+## Problem
+
+The play queue lives only in memory (`PlayQueue` inside each `BotInstance`). It is lost in two situations the user calls out:
+
+1. **On restart** — the process stops, the in-memory queue is gone.
+2. **On "直接播放"** — `!play <song>` (and the WebUI "play now" path) call `queue.clear()`, wiping the queue to play one song.
+
+The user wants to stop losing the queue. Two related-but-separate capabilities were agreed:
+
+- **Named save/load** of queues (manual), plus **auto-restore** of the live queue across restarts.
+- An **independent** option to make single-song immediate-play *not* clear the queue.
+
+Everything ships **behind admin/independent toggles that default OFF**, so existing behavior is unchanged until an operator opts in.
+
+## Scope & agreed decisions
+
+| Decision | Choice |
+| --- | --- |
+| Core behavior | **Both** — named save/load **and** auto-restore live queue across restart |
+| Saved-queue ownership | **Per-user** (like `favorite_playlists`), plus a reserved `__shared__` owner for chat + opt-in sharing |
+| Trigger surface | **Web + chat** commands |
+| Auto-restore on restart | **Restore and resume playing** (gated by `savedQueuesEnabled`) |
+| Load semantics | **Replace (default) + append option** (`-a` flag / WebUI Append button) |
+| Feature gate | `savedQueuesEnabled` — **default false, admin-controlled** |
+| Single-play clear | Independent `playKeepsQueue` toggle — **default false** |
+
+### Out of scope (YAGNI)
+
+- Renaming a saved queue (delete + re-save instead).
+- Mid-track resume on restart (resume from the current track's **start**; URLs are re-resolved).
+- Normalized per-song storage (songs stored as a JSON blob).
+- Sharing granularity beyond "private to me" vs "shared" (one boolean).
+
+## Storage approach
+
+A saved queue is an ordered list of songs that is only ever saved and loaded **whole** — never queried song-by-song. So songs are stored as a **JSON `TEXT` blob**, not a normalized child table. Each stored song is a `QueuedSong` **without `url`** (URLs are resolved lazily at play time, exactly as today). This mirrors how `QueuedSong` already flows and keeps the schema to a single row per saved queue.
+
+---
+
+## Feature 1 — Named save/load (`savedQueuesEnabled`)
+
+### Data model
+
+New table:
+
+```sql
+CREATE TABLE IF NOT EXISTS saved_queues (
+  id        INTEGER PRIMARY KEY AUTOINCREMENT,
+  ownerId   TEXT NOT NULL,          -- WebUI user id, or the reserved SHARED owner
+  name      TEXT NOT NULL,
+  songs     TEXT NOT NULL,          -- JSON array of stored songs (QueuedSong minus url)
+  songCount INTEGER NOT NULL DEFAULT 0,
+  createdAt TEXT NOT NULL DEFAULT (datetime('now')),
+  updatedAt TEXT NOT NULL DEFAULT (datetime('now')),
+  UNIQUE(ownerId, name)
+);
+CREATE INDEX IF NOT EXISTS idx_saved_queues_ownerId ON saved_queues(ownerId);
+```
+
+- **`ownerId`** is either a real user id **or** a reserved constant `SHARED_QUEUE_OWNER = "__shared__"` (a value that can never collide with a real user id).
+- **Ownership rule (reconciles per-user with chat):**
+  - **WebUI save** has a **"共享 (shared)" checkbox.** Off → `ownerId = req.user.id` (private to you). On → `ownerId = SHARED_QUEUE_OWNER`.
+  - **Chat `!save`** always writes `ownerId = SHARED_QUEUE_OWNER` (TeamSpeak users have no WebUI account).
+  - **WebUI list** shows **your own + shared** (labeled). **Chat `!queues`/`!load`** see **shared only**.
+- **Overwrite:** `UNIQUE(ownerId, name)` → save is an **upsert** (same owner+name replaces `songs`, `songCount`, `updatedAt`).
+- **Caps** (reject with a clear message): ≤ **50** saved queues per owner; ≤ **1000** songs per saved queue.
+
+### DB methods (added to `BotDatabase`)
+
+```ts
+saveQueue(ownerId: string, name: string, songs: StoredSong[]): SavedQueue;   // upsert
+listSavedQueues(ownerId: string, includeShared: boolean): SavedQueueMeta[];  // meta only (no songs blob)
+getSavedQueue(id: number): SavedQueue | null;                                // full, with songs
+deleteSavedQueue(id: number): boolean;
+```
+
+- `StoredSong` = `Omit<QueuedSong, "url">`.
+- `SavedQueueMeta` = row without the `songs` blob (id, ownerId, name, songCount, timestamps) — keeps list responses light.
+- JSON (de)serialize at the DB boundary; parse failures on a corrupt blob degrade to an empty song list (never throw into a route).
+
+### Web API — `src/web/api/saved-queues.ts`
+
+All routes require auth + `player.queue` capability, and **404/403 when `savedQueuesEnabled` is false** (feature inert).
+
+| Method / path | Behavior |
+| --- | --- |
+| `GET /api/saved-queues` | list current user's own + shared (meta only) |
+| `POST /api/saved-queues` | body `{ botId, name, shared? }` → snapshot that bot's **current queue** songs, upsert |
+| `POST /api/saved-queues/:id/load` | body `{ botId, mode: "replace"\|"append" }` → load into that bot |
+| `DELETE /api/saved-queues/:id` | delete (only own or shared; not another user's private) |
+
+Ownership check on load/delete: allow if `ownerId === req.user.id` or `ownerId === SHARED_QUEUE_OWNER`; else 404 (no existence leak, matching the favorites pattern).
+
+### Chat commands (new, in `BotInstance.executeCommand`)
+
+- `!save <名称>` — save current queue → shared bucket.
+- `!load <名称>` — replace queue with a saved (shared) queue and play.
+- `!load -a <名称>` — append a saved (shared) queue to the end.
+- `!queues` — list shared saved queues (names + counts).
+
+All four reply **"此功能未启用"** when `savedQueuesEnabled` is false. Added to help text and the command table.
+
+### Load semantics (shared by web + chat)
+
+- **replace** — `queue.clear()`, add all stored songs, `queue.play()` + `resolveAndPlay(first)` (same shape as `cmdPlaylist`). Exits FM mode.
+- **append** — add all stored songs to the end; if idle, start the first newly-added one; never interrupts a playing track.
+- Loaded songs are re-tagged with a `requestedBy` of the loader (WebUI username / `游客` / chat `invokerName`) so play-history attribution stays correct (integrates with #121).
+
+### WebUI
+
+A new **"已保存队列 / Saved Queues"** page (nav entry visible only when `savedQueuesEnabled`):
+
+- **Save current queue**: name input + **共享** checkbox → `POST`.
+- Per entry (reusing `SongCard`/list styles): **Load** (replace), **Append**, **Delete**, showing name / song count / shared badge / owner.
+- Store/composable follows the existing `favorites` pattern.
+
+---
+
+## Feature 2 — Auto-restore live queue across restart (`savedQueuesEnabled`)
+
+Gated by the **same** `savedQueuesEnabled` flag (part of the "saved queues" feature).
+
+### Data model
+
+One row per bot (the live snapshot, continuously overwritten):
+
+```sql
+CREATE TABLE IF NOT EXISTS queue_state (
+  botId        TEXT PRIMARY KEY,
+  songs        TEXT NOT NULL,       -- JSON array of StoredSong
+  currentIndex INTEGER NOT NULL,
+  mode         TEXT NOT NULL,       -- PlayMode value
+  isFmMode     INTEGER NOT NULL DEFAULT 0,
+  fmPlatform   TEXT NOT NULL DEFAULT '',
+  updatedAt    TEXT NOT NULL DEFAULT (datetime('now'))
+);
+```
+
+DB methods: `saveQueueState(state)` (upsert), `getQueueState(botId)`, `clearQueueState(botId)`.
+
+### Snapshot (write path)
+
+- Add `PlayQueue.snapshot(): QueueSnapshot` and `PlayQueue.restore(snapshot)`.
+  - `snapshot` captures `songs` (minus url), `currentIndex`, `mode`.
+  - `restore` rebuilds `songs`, `currentIndex`, `mode`, and resets the derived `playedIndices`/`history`/`forwardStack` to a clean, consistent state for the restored index.
+- `BotInstance` writes the snapshot **debounced (~1 s)** on `stateChange` (queue mutations, track changes, and mode changes already emit `stateChange`). FM mode + fm platform captured alongside.
+- When the queue becomes empty (`clear()` with nothing re-added), the row is cleared via `clearQueueState`.
+
+### Restore (read path — "resume and play")
+
+When a bot reaches **connected/ready** (the same lifecycle point `autoStart` uses):
+
+1. If `savedQueuesEnabled` and a `queue_state` row exists → `PlayQueue.restore(...)`, restore FM mode/provider.
+2. If there was a current track → `resolveAndPlay(current)` (re-resolves URL, plays **from the track's start**).
+
+**Honest caveats (documented in README + spec):**
+
+- Resumes the **current track from its start**, not the exact millisecond (URLs are re-resolved; no persisted elapsed/seek).
+- **Spotify** auto-resume is **best-effort** — it depends on the sidecar/controller being back up; non-Spotify sources are reliable.
+- Resume only happens for bots that reach the connected state (auto-started, or on next manual start).
+
+---
+
+## Feature 3 — `playKeepsQueue` (independent single-play toggle)
+
+**Independent** config flag, **not** gated by `savedQueuesEnabled`. Default false → today's behavior.
+
+Affects **single-song immediate play only**: chat `!play <song | #N | id:<id> | URL>` and the WebUI play-now / play-by-id path.
+
+| `playKeepsQueue` | `!play <song>` behavior |
+| --- | --- |
+| `false` (default) | `queue.clear()` → play only that song (today) |
+| `true` | `addNext(song)` (insert after current) → `playAt(insertedAt)` (jump & play now) → `resolveAndPlay`; queue **kept**; on track-end, `next()` continues the queue |
+
+- Reuses existing `PlayQueue.addNext` + `playAt` — **no new queue logic.**
+- **Not** applied to collection loads — `!playlist` / `!album` / `!artist` / `!fm` still replace the queue (loading a collection is meant to replace; the request is about 单曲/single songs).
+- **Empty queue** → equivalent to a normal play (nothing to preserve).
+- **FM mode** → `!play` still exits FM (manual takeover), but existing queued songs are preserved and continue after the single song (auto-refill stops because FM is off). Documented.
+
+---
+
+## Config
+
+Add to `BotConfig` (in `src/data/config.ts`), both **default false**, both sanitized on load exactly like `localAudioEnabled` / `autoPauseOnEmpty` (so a hand-edited / legacy / corrupt `config.json` can never silently enable them):
+
+```ts
+savedQueuesEnabled: boolean;  // default false — gates Features 1 & 2 (admin-controlled)
+playKeepsQueue: boolean;      // default false — independent (Feature 3)
+```
+
+- Set via **Settings → 行为设置** (the existing admin behavior-settings surface, written through `POST /api/bot/settings`).
+- When `savedQueuesEnabled` is false: chat save/load/queues reply "此功能未启用"; `/api/saved-queues/*` return 403/404; the WebUI page/nav is hidden; no snapshotting; no auto-restore.
+
+## Error handling & edge cases
+
+- Corrupt `songs` JSON blob → treated as empty list; never throws into a route or the restore path.
+- Save with a duplicate name → upsert (overwrite), not an error.
+- Load/delete of a non-owned private queue → 404.
+- Caps exceeded → 4xx with a clear message (web) / friendly reply (chat).
+- Snapshot writes are best-effort and debounced; a DB write failure logs and never interrupts playback.
+- Restore of a Spotify-containing queue → best-effort per source; failures skip to next (existing `resolveAndPlay` skip behavior).
+
+## Testing (TDD)
+
+- **DB:** `saveQueue` upsert + caps; `listSavedQueues` own vs shared; `getSavedQueue`/`deleteSavedQueue`; ownership; `queue_state` upsert/get/clear; JSON round-trip + corrupt-blob degradation.
+- **PlayQueue:** `snapshot`/`restore` round-trip (songs, index, mode; derived state consistent).
+- **BotInstance:** `!save`/`!load`/`!load -a`/`!queues`; feature-disabled replies; snapshot-on-stateChange (debounced); resume-on-ready; `playKeepsQueue` insert-and-jump vs clear; collections still replace; FM interaction.
+- **Web API:** auth + capability + feature-gate (403/404); save (own/shared); load replace/append; delete ownership; caps.
+- **Config:** defaults false; load sanitization (legacy/corrupt/non-boolean → false).
+- **Frontend:** Saved Queues page (save w/ shared toggle, load, append, delete, hidden when disabled); store/composable.
+- Then: full suite (`npx vitest run --no-file-parallelism`) + `npx tsc --noEmit` + `cd web && npm run build`.
+
+## Rollout / staging
+
+Implement in stages (each independently valuable, all default-off):
+
+1. **Config + gates** — `savedQueuesEnabled`, `playKeepsQueue`, sanitization, Settings UI.
+2. **Feature 3** — `playKeepsQueue` single-play behavior (small, self-contained).
+3. **Feature 1** — named save/load (DB → API → chat → WebUI page).
+4. **Feature 2** — live-queue snapshot + resume-on-restart.
+5. **Docs** — README (commands, toggles, caveats).
@@ -3,10 +3,15 @@
  "version": "0.1.0",
  "description": "TeamSpeak music bot with NetEase Cloud Music and QQ Music support",
  "type": "module",
+  "engines": {
+    "node": "^22.12.0 || >=24.0.0"
+  },
  "scripts": {
    "dev": "tsx watch src/index.ts",
    "build": "tsc && npm run build:web",
    "build:web": "cd web && npm run build",
+    "check:native": "node scripts/check-native.mjs",
+    "prestart": "node scripts/check-native.mjs",
    "start": "node dist/index.js",
    "play": "node dist/index.js",
    "test": "vitest run",
@@ -0,0 +1,591 @@
+diff --git a/src/music/netease.test.ts b/src/music/netease.test.ts
+index b2adb3d..ecc2202 100644
+--- a/src/music/netease.test.ts
+++ b/src/music/netease.test.ts
+@@ -1,5 +1,5 @@
+ import { describe, it, expect } from "vitest";
+-import { parseLyrics } from "./netease.js";
+import { parseLyrics, mapNeteaseAlbums } from "./netease.js";
+ 
+ describe("NetEase adapter", () => {
+   it("parses LRC format lyrics", () => {
+@@ -28,4 +28,32 @@ describe("NetEase adapter", () => {
+     expect(lines[0].text).toBe("Hello world");
+     expect(lines[0].translation).toBe("你好世界");
+   });
+
+  it("mapNeteaseAlbums maps raw cloudsearch albums to Album shape", () => {
+    const raw = [
+      {
+        id: 42,
+        name: "Album A",
+        picUrl: "https://x/p.jpg",
+        artists: [{ name: "Artist X" }, { name: "Featured Y" }],
+        size: 12,
+      },
+      {
+        id: 99,
+        name: "Album B",
+        picUrl: "",
+        artists: [],
+      },
+    ];
+    expect(mapNeteaseAlbums(raw)).toEqual([
+      { id: "42", name: "Album A", artist: "Artist X / Featured Y", coverUrl: "https://x/p.jpg", songCount: 12, platform: "netease" },
+      { id: "99", name: "Album B", artist: "", coverUrl: "", songCount: 0, platform: "netease" },
+    ]);
+  });
+
+  it("mapNeteaseAlbums returns [] for empty/null input", () => {
+    expect(mapNeteaseAlbums([])).toEqual([]);
+    expect(mapNeteaseAlbums(null as any)).toEqual([]);
+    expect(mapNeteaseAlbums(undefined as any)).toEqual([]);
+  });
+ });
+diff --git a/src/music/netease.ts b/src/music/netease.ts
+index 8aaeab6..4a863db 100644
+--- a/src/music/netease.ts
+++ b/src/music/netease.ts
+@@ -8,6 +8,7 @@ import type {
+   SearchResult,
+   QrCodeResult,
+   AuthStatus,
+  Album,
+ } from "./provider.js";
+ 
+ export function parseLyrics(lrc: string, tlyric?: string): LyricLine[] {
+@@ -55,6 +56,18 @@ export function parseLyrics(lrc: string, tlyric?: string): LyricLine[] {
+   return lines.sort((a, b) => a.time - b.time);
+ }
+ 
+export function mapNeteaseAlbums(raw: any[] | null | undefined): Album[] {
+  if (!Array.isArray(raw)) return [];
+  return raw.map((a) => ({
+    id: String(a.id),
+    name: a.name ?? "",
+    artist: (a.artists ?? []).map((x: any) => x.name).join(" / "),
+    coverUrl: a.picUrl ?? "",
+    songCount: a.size ?? 0,
+    platform: "netease",
+  }));
+}
+
+ // NetEase quality levels: standard(128k) higher(192k) exhigh(320k) lossless(flac) hires(hi-res) jyeffect jymaster
+ export const NETEASE_QUALITY_LEVELS = [
+   { value: "standard", label: "标准 (128kbps)", bitrate: 128 },
+@@ -91,7 +104,7 @@ export class NeteaseProvider implements MusicProvider {
+   }
+ 
+   async search(query: string, limit = 20): Promise<SearchResult> {
+-    const [songRes, playlistRes] = await Promise.all([
+    const [songRes, playlistRes, albumRes] = await Promise.all([
+       this.api.get("/cloudsearch", {
+         params: { keywords: query, type: 1, limit, ...this.cookieParams },
+       }),
+@@ -103,6 +116,9 @@ export class NeteaseProvider implements MusicProvider {
+           ...this.cookieParams,
+         },
+       }),
+      this.api.get("/cloudsearch", {
+        params: { keywords: query, type: 10, limit: 5, ...this.cookieParams },
+      }),
+     ]);
+ 
+     const songs: Song[] = (songRes.data?.result?.songs ?? []).map(
+@@ -127,7 +143,9 @@ export class NeteaseProvider implements MusicProvider {
+       platform: "netease",
+     }));
+ 
+-    return { songs, playlists, albums: [] };
+    const albums = mapNeteaseAlbums(albumRes.data?.result?.albums);
+
+    return { songs, playlists, albums };
+   }
+ 
+   async getSongUrl(songId: string, quality?: string): Promise<string | null> {
+diff --git a/src/music/qq.test.ts b/src/music/qq.test.ts
+new file mode 100644
+index 0000000..4f606cf
+--- /dev/null
+++ b/src/music/qq.test.ts
+@@ -0,0 +1,43 @@
+import { describe, it, expect } from "vitest";
+import { mapQqAlbums } from "./qq.js";
+
+describe("QQ adapter", () => {
+  it("mapQqAlbums maps albumMID-style raw entries", () => {
+    const raw = [
+      {
+        albumMID: "abc",
+        albumName: "Aero",
+        singerName: "Singer A",
+      },
+      {
+        albumMID: "xyz",
+        albumName: "Beta",
+        singer: [{ name: "Singer B" }, { name: "Singer C" }],
+      },
+    ];
+    const out = mapQqAlbums(raw);
+    expect(out).toHaveLength(2);
+    expect(out[0]).toMatchObject({
+      id: "abc",
+      name: "Aero",
+      artist: "Singer A",
+      platform: "qq",
+    });
+    expect(out[0].coverUrl).toContain("T002R300x300M000abc.jpg");
+    expect(out[1].artist).toBe("Singer B / Singer C");
+    expect(out[1].coverUrl).toContain("xyz");
+  });
+
+  it("mapQqAlbums returns [] for empty/null input", () => {
+    expect(mapQqAlbums([])).toEqual([]);
+    expect(mapQqAlbums(null as any)).toEqual([]);
+    expect(mapQqAlbums(undefined as any)).toEqual([]);
+  });
+
+  it("mapQqAlbums falls back to albumPic when no albumMID", () => {
+    const raw = [{ albumName: "C", albumPic: "https://x/p.jpg", singerName: "S" }];
+    const out = mapQqAlbums(raw);
+    expect(out[0].coverUrl).toBe("https://x/p.jpg");
+    expect(out[0].id).toBe("");
+  });
+});
+diff --git a/src/music/qq.ts b/src/music/qq.ts
+index 9c0360d..1e7a8ae 100644
+--- a/src/music/qq.ts
+++ b/src/music/qq.ts
+@@ -8,6 +8,7 @@ import type {
+   SearchResult,
+   QrCodeResult,
+   AuthStatus,
+  Album,
+ } from "./provider.js";
+ import { parseLyrics } from "./netease.js";
+ 
+@@ -27,6 +28,26 @@ const qqFavApi = axios.create({
+   headers: { referer: "https://y.qq.com/" },
+ });
+ 
+export function mapQqAlbums(raw: any[] | null | undefined): Album[] {
+  if (!Array.isArray(raw)) return [];
+  return raw.map((a) => {
+    const id = String(a.albumMID ?? a.mid ?? a.albumID ?? "");
+    const artist = a.singerName
+      ?? (Array.isArray(a.singer) ? a.singer.map((s: any) => s.name).join(" / ") : "");
+    const coverUrl = id
+      ? `https://y.gtimg.cn/music/photo_new/T002R300x300M000${id}.jpg`
+      : (a.albumPic ?? "");
+    return {
+      id,
+      name: a.albumName ?? a.title ?? "",
+      artist,
+      coverUrl,
+      songCount: a.song_count ?? a.songCount ?? 0,
+      platform: "qq" as const,
+    };
+  });
+}
+
+ function computeGtk(pSkey: string): number {
+   let hash = 5381;
+   for (let i = 0; i < pSkey.length; i++) {
+@@ -65,11 +86,12 @@ export class QQMusicProvider implements MusicProvider {
+       req_0: {
+         module: "music.search.SearchCgiService",
+         method: "DoSearchForQQMusicDesktop",
+-        param: {
+-          searchid: "1",
+-          query,
+-          num_per_page: Math.min(limit, 50),
+-        },
+        param: { searchid: "1", query, num_per_page: Math.min(limit, 50), search_type: 0 },
+      },
+      req_album: {
+        module: "music.search.SearchCgiService",
+        method: "DoSearchForQQMusicDesktop",
+        param: { searchid: "1", query, num_per_page: 5, search_type: 8 },
+       },
+     });
+     const res = await qqDirectApi.get("/cgi-bin/musicu.fcg", {
+@@ -90,7 +112,10 @@ export class QQMusicProvider implements MusicProvider {
+       platform: "qq",
+     }));
+ 
+-    return { songs, playlists: [], albums: [] };
+    const albumList: any[] = res.data?.req_album?.data?.body?.album?.list ?? [];
+    const albums = mapQqAlbums(albumList);
+
+    return { songs, playlists: [], albums };
+   }
+ 
+   async getSongUrl(songId: string, quality?: string): Promise<string | null> {
+diff --git a/src/web/api/music.ts b/src/web/api/music.ts
+index b08f9a2..edf9c04 100644
+--- a/src/web/api/music.ts
+++ b/src/web/api/music.ts
+@@ -52,14 +52,20 @@ export function createMusicRouter(
+       ]);
+ 
+       const songs = [
+-        ...(neteaseResult.status === "fulfilled"
+-          ? neteaseResult.value.songs
+-          : []),
+        ...(neteaseResult.status === "fulfilled" ? neteaseResult.value.songs : []),
+         ...(qqResult.status === "fulfilled" ? qqResult.value.songs : []),
+         ...(bilibiliResult.status === "fulfilled" ? bilibiliResult.value.songs : []),
+       ];
+      const albums = [
+        ...(neteaseResult.status === "fulfilled" ? neteaseResult.value.albums : []),
+        ...(qqResult.status === "fulfilled" ? qqResult.value.albums : []),
+      ];
+      const playlists = [
+        ...(neteaseResult.status === "fulfilled" ? neteaseResult.value.playlists : []),
+        ...(qqResult.status === "fulfilled" ? qqResult.value.playlists : []),
+      ];
+ 
+-      res.json({ songs });
+      res.json({ songs, albums, playlists });
+     } catch (err) {
+       logger.error({ err }, "Unified search failed");
+       res.status(500).json({ error: (err as Error).message });
+diff --git a/src/web/api/player.ts b/src/web/api/player.ts
+index a9af600..4f0930b 100644
+--- a/src/web/api/player.ts
+++ b/src/web/api/player.ts
+@@ -313,6 +313,78 @@ export function createPlayerRouter(
+     }
+   });
+ 
+  // Play an album by ID — mirrors play-playlist but calls getAlbumSongs
+  router.post("/:botId/play-album", async (req, res) => {
+    try {
+      const bot = (req as any).bot;
+      const { albumId, platform } = req.body;
+      const provider = bot.getProviderFor(
+        platform === "bilibili" || platform === "qq" || platform === "youtube"
+          ? platform
+          : "netease"
+      );
+
+      // Stop current playback
+      bot.getPlayer().stop();
+      bot.getPlayer().resetFailures();
+
+      const songs = await provider.getAlbumSongs(albumId);
+      if (songs.length === 0) {
+        res.json({ message: "Album is empty" });
+        return;
+      }
+
+      // QQ-specific optimization: batch-resolve playable IDs to avoid
+      // wasting retries on region/copyright-restricted tracks.
+      let queueable: { id: string }[] = songs;
+      const totalCount = songs.length;
+      const qqLike = provider as { getPlayableSongIds?: (ids: string[]) => Promise<Set<string> | null> };
+      if (typeof qqLike.getPlayableSongIds === "function") {
+        const playable = await qqLike.getPlayableSongIds(songs.map((s: { id: string }) => s.id));
+        if (playable !== null) {
+          queueable = songs.filter((s: { id: string }) => playable.has(s.id));
+        }
+      }
+      if (queueable.length === 0) {
+        res.json({ ok: false, message: `专辑 ${totalCount} 首歌曲均无版权可播放（区域/版权限制）` });
+        return;
+      }
+
+      const queue = bot.getQueueManager();
+      queue.clear();
+      for (const song of queueable) {
+        queue.add({ ...song, platform: provider.platform });
+      }
+
+      const mode = queue.getMode();
+      let first;
+      if (mode === "random" || mode === "rloop") {
+        const idx = Math.floor(Math.random() * queue.size());
+        first = queue.playAt(idx);
+      } else {
+        first = queue.play();
+      }
+
+      let started = first ? await bot.resolveAndPlay(first) : false;
+      if (first && !started) {
+        started = await bot.playNext(20);
+      }
+
+      const playing = queue.current();
+      const loadedMsg = queueable.length < totalCount
+        ? `已加载 ${queueable.length}/${totalCount} 首（其余区域/版权限制）`
+        : `已加载 ${queueable.length} 首`;
+      if (started && playing) {
+        res.json({ ok: true, message: `${loadedMsg}，正在播放：${playing.name}` });
+      } else {
+        res.json({ ok: false, message: `${loadedMsg}，但无法开始播放。` });
+      }
+    } catch (err) {
+      logger.error({ err }, "play-album failed");
+      res.status(500).json({ error: (err as Error).message });
+    }
+  });
+
+   // Play a single song by ID — resolves URL on demand
+   router.post("/:botId/play-song", async (req, res) => {
+     try {
+diff --git a/web/src/router/index.ts b/web/src/router/index.ts
+index cc060f5..d62afcd 100644
+--- a/web/src/router/index.ts
+++ b/web/src/router/index.ts
+@@ -22,6 +22,13 @@ const router = createRouter({
+       path: '/playlist/:id',
+       name: 'playlist',
+       component: () => import('../views/Playlist.vue'),
+      meta: { kind: 'playlist' },
+    },
+    {
+      path: '/album/:id',
+      name: 'album',
+      component: () => import('../views/Playlist.vue'),
+      meta: { kind: 'album' },
+     },
+     {
+       path: '/lyrics',
+diff --git a/web/src/stores/player.ts b/web/src/stores/player.ts
+index 9bc817d..083262c 100644
+--- a/web/src/stores/player.ts
+++ b/web/src/stores/player.ts
+@@ -322,6 +322,16 @@ export const usePlayerStore = defineStore('player', {
+       this._syncAfterAction();
+     },
+ 
+    async playAlbum(albumId: string, platform = 'netease') {
+      if (!this.activeBotId) return;
+      const res = await axios.post(`/api/player/${this.activeBotId}/play-album`, { albumId, platform });
+      if (res.data?.message) {
+        this.notify(res.data.message, res.data.ok === false ? 'error' : 'info');
+      }
+      this._setTiming(this.activeBotId, { serverElapsed: 0 });
+      this._syncAfterAction();
+    },
+
+     async pause() {
+       if (!this.activeBotId) return;
+       // Freeze elapsed at current interpolated value
+diff --git a/web/src/views/Playlist.vue b/web/src/views/Playlist.vue
+index d5c9f8d..d00101d 100644
+--- a/web/src/views/Playlist.vue
+++ b/web/src/views/Playlist.vue
+@@ -38,7 +38,7 @@
+       </div>
+     </template>
+ 
+-    <div v-else class="loading">歌单不存在或加载失败</div>
+    <div v-else class="loading">{{ kind === 'album' ? '专辑' : '歌单' }}不存在或加载失败</div>
+   </div>
+ </template>
+ 
+@@ -64,6 +64,8 @@ interface PlaylistDetail {
+   songCount: number;
+ }
+ 
+const kind = (route.meta.kind as string) ?? 'playlist'; // 'playlist' | 'album'
+
+ const playlist = ref<PlaylistDetail | null>(null);
+ const songs = ref<Song[]>([]);
+ const loading = ref(true);
+@@ -71,20 +73,32 @@ const loading = ref(true);
+ async function playAll() {
+   const id = route.params.id as string;
+   const platform = (route.query.platform as string) || 'netease';
+-  await store.playPlaylist(id, platform);
+  if (kind === 'album') {
+    await store.playAlbum(id, platform);
+  } else {
+    await store.playPlaylist(id, platform);
+  }
+ }
+ 
+ onMounted(async () => {
+   const id = route.params.id as string;
+   const platform = (route.query.platform as string) || 'netease';
+ 
+  const detailUrl = kind === 'album'
+    ? `/api/music/album/${id}/detail`
+    : `/api/music/playlist/${id}/detail`;
+  const songsUrl = kind === 'album'
+    ? `/api/music/album/${id}`
+    : `/api/music/playlist/${id}`;
+
+   // allSettled, not Promise.all — if detail 404s but songs is fine
+   // (e.g., a QQ playlist whose detail endpoint flaked but the song
+   // list resolved), we still want to show the songs rather than
+-  // the "歌单不存在" empty state.
+  // the "不存在" empty state. For albums, detail always 404s — that
+  // is intentional; the fallback stub below handles it.
+   const [detailRes, songsRes] = await Promise.allSettled([
+-    axios.get(`/api/music/playlist/${id}/detail`, { params: { platform } }),
+-    axios.get(`/api/music/playlist/${id}`, { params: { platform } }),
+    axios.get(detailUrl, { params: { platform } }),
+    axios.get(songsUrl, { params: { platform } }),
+   ]);
+ 
+   const detail = detailRes.status === 'fulfilled' ? detailRes.value.data?.playlist : null;
+@@ -96,7 +110,7 @@ onMounted(async () => {
+     // Fall back to a stub built from the route + first song's cover.
+     playlist.value = {
+       id,
+-      name: '歌单',
+      name: kind === 'album' ? '专辑' : '歌单',
+       description: '',
+       coverUrl: songList[0]?.coverUrl ?? '',
+       songCount: songList.length,
+@@ -104,7 +118,7 @@ onMounted(async () => {
+   } else {
+     playlist.value = null;
+     if (detailRes.status === 'rejected') {
+-      console.error('Failed to load playlist detail:', (detailRes.reason as any)?.response?.status, (detailRes.reason as any)?.message);
+      console.error('Failed to load detail:', (detailRes.reason as any)?.response?.status, (detailRes.reason as any)?.message);
+     }
+   }
+   songs.value = songList;
+diff --git a/web/src/views/Search.vue b/web/src/views/Search.vue
+index 0536e36..8822277 100644
+--- a/web/src/views/Search.vue
+++ b/web/src/views/Search.vue
+@@ -20,22 +20,54 @@
+ 
+     <div v-if="loading" class="loading">搜索中...</div>
+ 
+-    <div v-else-if="results.length > 0" class="results">
+-      <SongCard
+-        v-for="(song, i) in results"
+-        :key="`${song.platform}-${song.id}`"
+-        :song="song"
+-        :index="i + 1"
+-        :active="store.currentSong?.id === song.id"
+-        @play="store.playSong(song)"
+-        @playNext="store.playNextSong(song)"
+-        @add="store.addSong(song)"
+-      />
+-    </div>
+    <template v-else-if="songs.length || albums.length || playlists.length">
+      <section v-if="albums.length" class="result-section">
+        <h2 class="section-title">专辑</h2>
+        <div class="card-grid">
+          <router-link
+            v-for="al in albums"
+            :key="`${al.platform}-${al.id}`"
+            :to="`/album/${al.id}?platform=${al.platform}`"
+            class="card hover-scale"
+          >
+            <CoverArt :url="al.coverUrl" :size="160" :radius="10" :show-shadow="true" />
+            <div class="card-name">{{ al.name }}</div>
+            <div class="card-sub">{{ al.artist }}</div>
+          </router-link>
+        </div>
+      </section>
+
+      <section v-if="playlists.length" class="result-section">
+        <h2 class="section-title">歌单</h2>
+        <div class="card-grid">
+          <router-link
+            v-for="pl in playlists"
+            :key="`${pl.platform}-${pl.id}`"
+            :to="`/playlist/${pl.id}?platform=${pl.platform}`"
+            class="card hover-scale"
+          >
+            <CoverArt :url="pl.coverUrl" :size="160" :radius="10" :show-shadow="true" />
+            <div class="card-name">{{ pl.name }}</div>
+          </router-link>
+        </div>
+      </section>
+
+      <section v-if="songs.length" class="result-section">
+        <h2 class="section-title">单曲</h2>
+        <SongCard
+          v-for="(song, i) in songs"
+          :key="`${song.platform}-${song.id}`"
+          :song="song"
+          :index="i + 1"
+          :active="store.currentSong?.id === song.id"
+          @play="store.playSong(song)"
+          @playNext="store.playNextSong(song)"
+          @add="store.addSong(song)"
+        />
+      </section>
+    </template>
+ 
+-    <div v-else-if="searched" class="empty">
+-      未找到相关结果
+-    </div>
+    <div v-else-if="searched" class="empty">未找到相关结果</div>
+   </div>
+ </template>
+ 
+@@ -45,15 +77,21 @@ import { useRoute } from 'vue-router';
+ import { Icon } from '@iconify/vue';
+ import axios from 'axios';
+ import { usePlayerStore } from '../stores/player.js';
+import type { Song } from '../stores/player.js';
+ import SongCard from '../components/SongCard.vue';
+import CoverArt from '../components/CoverArt.vue';
+ 
+ const store = usePlayerStore();
+ const route = useRoute();
+ 
+ const query = ref((route.query.q as string) || '');
+-import { Song } from '../stores/player.js';
+ 
+-const results = ref<Song[]>([]);
+interface Album { id: string; name: string; artist: string; coverUrl: string; songCount?: number; platform: string; }
+interface Playlist { id: string; name: string; coverUrl: string; songCount?: number; platform: string; }
+
+const songs = ref<Song[]>([]);
+const albums = ref<Album[]>([]);
+const playlists = ref<Playlist[]>([]);
+ const loading = ref(false);
+ const searched = ref(false);
+ 
+@@ -62,12 +100,12 @@ async function doSearch() {
+   loading.value = true;
+   searched.value = true;
+   try {
+-    const res = await axios.get('/api/music/search/all', {
+-      params: { q: query.value },
+-    });
+-    results.value = res.data.songs;
+    const res = await axios.get('/api/music/search/all', { params: { q: query.value } });
+    songs.value = res.data.songs ?? [];
+    albums.value = res.data.albums ?? [];
+    playlists.value = res.data.playlists ?? [];
+   } catch {
+-    results.value = [];
+    songs.value = []; albums.value = []; playlists.value = [];
+   } finally {
+     loading.value = false;
+   }
+@@ -141,4 +179,23 @@ onMounted(() => {
+   flex-direction: column;
+   gap: 2px;
+ }
+
+.result-section {
+  margin-bottom: 32px;
+  .section-title { font-size: 18px; margin: 0 0 12px; opacity: 0.85; }
+}
+.card-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
+  gap: 16px;
+}
+.card {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  text-decoration: none;
+  color: inherit;
+  .card-name { font-size: 14px; line-height: 1.3; max-height: 2.6em; overflow: hidden; }
+  .card-sub  { font-size: 12px; opacity: 0.6; }
+}
+ </style>
@@ -0,0 +1,155 @@
+#!/usr/bin/env node
+
+/**
+ * Preflight: can THIS Node build actually load the native modules that are
+ * sitting in node_modules?
+ *
+ * A compiled addon is tied to one Node ABI (process.versions.modules:
+ * Node 20 = 115, Node 22 = 127, Node 24 = 137). Install under one Node major,
+ * launch under another, and the bot dies deep inside startup with a
+ * `NODE_MODULE_VERSION ...` stack that says nothing about how to fix it.
+ * This script turns that into one actionable sentence, before anything starts.
+ *
+ * Exit code:
+ *   0  every required native module loads (or is simply not installed yet —
+ *      that is npm install's problem, not an ABI problem)
+ *   1  a required native module definitively fails to load; the bot could not
+ *      have started anyway, so there is no false-positive risk here.
+ *
+ * Usage: node scripts/check-native.mjs
+ */
+
+import { execFileSync } from "node:child_process";
+import { existsSync, readFileSync } from "node:fs";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+import { createLineWriter } from "./lib/console-log.mjs";
+
+const ROOT = join(dirname(fileURLToPath(import.meta.url)), "..");
+const NODE_MODULES = join(ROOT, "node_modules");
+const STAMP_FILE = join(NODE_MODULES, ".tsmusicbot-abi");
+const NODE_ABI = process.versions.modules;
+
+/** Only the modules the bot cannot start without. ffmpeg-static is optional
+ *  (a system ffmpeg on PATH works too), so it is not checked here. */
+const REQUIRED = ["@discordjs/opus", "better-sqlite3"];
+
+function pkgDirOf(spec) {
+  return join(NODE_MODULES, ...spec.split("/"));
+}
+
+function summarizeError(text) {
+  const lines = String(text || "")
+    .split(/\r?\n/)
+    .map((l) => l.trim())
+    .filter(Boolean);
+  const interesting = lines.find((l) => /NODE_MODULE_VERSION|Error:|error:/.test(l));
+  return (interesting || lines[0] || "unknown error").slice(0, 300);
+}
+
+/**
+ * The snippet that actually forces each package's addon to be dlopen()ed.
+ * NOTE: better-sqlite3 loads its .node lazily, inside the Database constructor,
+ * so a bare `require('better-sqlite3')` succeeds even against a wrong-ABI
+ * binary. Opening an in-memory database is the cheapest way to really load it.
+ */
+const PROBE_EXPR = {
+  "@discordjs/opus": "require('@discordjs/opus')",
+  "better-sqlite3": "new (require('better-sqlite3'))(':memory:').close()",
+};
+
+/**
+ * Load-probe in a throwaway child process. Child process on purpose: requiring
+ * an addon in this process would keep the DLL mapped, and Windows then refuses
+ * to let setup.bat replace the file we just told the user to replace.
+ */
+function probeRequire(spec) {
+  const expr = PROBE_EXPR[spec] || `require(${JSON.stringify(spec)})`;
+  try {
+    execFileSync(process.execPath, ["-e", expr], {
+      cwd: ROOT,
+      stdio: "pipe",
+      timeout: 120000,
+      windowsHide: true,
+    });
+    return { ok: true };
+  } catch (err) {
+    const text = [err.stderr && err.stderr.toString(), err.message].filter(Boolean).join("\n");
+    // "...compiled against ... NODE_MODULE_VERSION 137. This version of Node.js
+    //  requires NODE_MODULE_VERSION 127..." -> first number is the build target.
+    const abis = [...text.matchAll(/NODE_MODULE_VERSION (\d+)/g)].map((m) => m[1]);
+    return {
+      ok: false,
+      abiMismatch: abis.length >= 2,
+      compiledAbi: abis.length >= 2 ? abis[0] : null,
+      error: summarizeError(text),
+    };
+  }
+}
+
+function readStamp() {
+  try {
+    return JSON.parse(readFileSync(STAMP_FILE, "utf8"));
+  } catch {
+    return null;
+  }
+}
+
+const setupCmd = process.platform === "win32" ? "scripts\\setup.bat" : "bash scripts/setup.sh";
+
+const broken = [];
+for (const spec of REQUIRED) {
+  if (!existsSync(pkgDirOf(spec))) continue; // not installed yet -> npm install's job
+  const probe = probeRequire(spec);
+  if (!probe.ok) broken.push({ spec, ...probe });
+}
+
+function report() {
+  const stamp = readStamp();
+  const mismatch = broken.find((b) => b.abiMismatch);
+  // Never let a failed console write become an uncaught error and replace this
+  // report with a stack trace - the console that cannot print the Chinese half
+  // of these lines is exactly the one a user needs the English half from.
+  // See scripts/lib/console-log.mjs and issue #152.
+  const out = createLineWriter(process.stderr);
+
+  out("");
+  out("============================================================");
+  if (mismatch) {
+    out("  [ERROR] 原生模块与当前 Node 版本不匹配");
+    out("          Native modules do not match this Node version");
+  } else {
+    out("  [ERROR] 原生模块无法加载 / native module failed to load");
+  }
+  out("============================================================");
+  out(`  本机 Node / running Node : ${process.version}  (ABI ${NODE_ABI})`);
+  if (stamp && stamp.abi) {
+    out(`  安装时 Node / built with : ${stamp.nodeVersion || "?"}  (ABI ${stamp.abi})`);
+    out(`                             ← node_modules/.tsmusicbot-abi, ${stamp.updatedAt || "?"}`);
+  }
+  out("");
+  for (const b of broken) {
+    if (b.abiMismatch) {
+      out(`  x ${b.spec}: 本机 Node ${process.version} (ABI ${NODE_ABI}),`);
+      out(`      但 node_modules 里的原生模块是给 ABI ${b.compiledAbi} 编译的。`);
+      out(`      built for ABI ${b.compiledAbi}, this Node needs ABI ${NODE_ABI}.`);
+    } else {
+      out(`  x ${b.spec}: ${b.error}`);
+    }
+  }
+  out("");
+  out("  怎么修 / How to fix:");
+  out(`    1) 重新运行安装脚本 / re-run setup:  ${setupCmd}`);
+  out("       (它会自动为当前 Node 版本重新安装原生模块)");
+  out("       (setup now repairs the native modules for whatever Node you run)");
+  out("    2) 或者换回安装时用的 Node 版本 / or switch back to the Node version");
+  out("       you installed with, then start again.");
+  out("============================================================");
+  out("");
+}
+
+if (broken.length > 0) {
+  report();
+  // exitCode rather than exit(): lets the message flush when stderr is piped.
+  process.exitCode = 1;
+}
@@ -4,7 +4,7 @@
 # ==========================================

 # --- Stage 1: Build backend + frontend ---
-FROM node:20-slim AS builder
+FROM node:22-slim AS builder

 # Install build tools for native modules (opus, better-sqlite3)
 RUN apt-get update && apt-get install -y --no-install-recommends \
@@ -30,7 +30,7 @@ RUN npm run build
 RUN rm -rf node_modules && npm ci --production && npm cache clean --force

 # --- Stage 2: Production image ---
-FROM node:20-slim
+FROM node:22-slim

 # Install system FFmpeg — the ffmpeg-static npm package bundles a pre-compiled
 # binary that can SIGSEGV inside Docker (incompatible glibc / missing libs).
@@ -46,6 +46,13 @@ COPY --from=builder /app/dist ./dist
 COPY --from=builder /app/web/dist ./web/dist
 COPY --from=builder /app/package*.json ./
 COPY --from=builder /app/node_modules ./node_modules
+# package.json declares a `prestart` preflight, so `npm start` inside the
+# container needs this file. The image's own CMD calls node directly and never
+# goes through npm, but an interactive `docker exec ... npm start` would
+# otherwise die on a missing script rather than starting the bot.
+COPY --from=builder /app/scripts/check-native.mjs ./scripts/check-native.mjs
+# ...and the module it imports for crash-proof logging.
+COPY --from=builder /app/scripts/lib/console-log.mjs ./scripts/lib/console-log.mjs

 # Data directory for database, cookies, logs
 RUN mkdir -p /app/data
@@ -1,161 +1,751 @@
 #!/usr/bin/env node

 /**
- * Download native binaries (ffmpeg + @discordjs/opus) from npmmirror CDN.
- * Called by setup.bat after npm install --ignore-scripts.
+ * Verify / download / repair the native binaries used by TSMusicBot
+ * (ffmpeg-static + @discordjs/opus + better-sqlite3), preferring the
+ * npmmirror CDN so China users never have to reach GitHub.
+ *
+ * Called by setup.bat / setup.sh after `npm install --ignore-scripts`.
+ *
+ * WHY THIS IS NOT JUST A DOWNLOADER
+ * ---------------------------------
+ * A compiled addon only loads into the exact Node ABI it was built for
+ * (process.versions.modules: Node 20 = 115, Node 22 = 127, Node 24 = 137).
+ * better-sqlite3 stores its addon at an ABI-agnostic path
+ * (build/Release/better_sqlite3.node), so a "file exists and is big enough"
+ * check happily keeps a binary built for a *different* Node major around and
+ * the bot then dies with `NODE_MODULE_VERSION 137 ... requires 127`.
+ * So we validate by actually LOADING each package — in a short-lived child
+ * process, because on Windows a loaded .node stays mapped and the OS then
+ * refuses to delete or overwrite it.
+ *
+ * Every repair is staged and swapped in atomically: if a download fails we put
+ * the previous file back, so a failed run can never leave the install in a
+ * worse state than it started.
 *
 * Usage: node scripts/download-binaries.mjs [cdn_base_url]
+ * Env:   TSMB_BINARY_LOG_STDOUT=1  also echo progress to stdout
+ *        (setup.bat uses this to show progress live on stderr while stdout
+ *         is redirected into setup.log)
 */

-import { existsSync, mkdirSync, writeFileSync, statSync } from "node:fs";
+import {
+  chmodSync,
+  createWriteStream,
+  existsSync,
+  mkdirSync,
+  mkdtempSync,
+  readdirSync,
+  readFileSync,
+  renameSync,
+  rmSync,
+  statSync,
+  writeFileSync,
+} from "node:fs";
 import { tmpdir } from "node:os";
-import { join, dirname } from "node:path";
+import { basename, dirname, join } from "node:path";
 import { createGunzip } from "node:zlib";
 import { pipeline } from "node:stream/promises";
-import { createWriteStream } from "node:fs";
 import { get } from "node:https";
 import { Readable } from "node:stream";
-import { execSync } from "node:child_process";
+import { execFileSync, execSync } from "node:child_process";
 import { createRequire } from "node:module";
 import { fileURLToPath } from "node:url";
+import { createLineWriter } from "./lib/console-log.mjs";

 const ROOT = join(dirname(fileURLToPath(import.meta.url)), "..");
+const NODE_MODULES = join(ROOT, "node_modules");
+const BACKUP_DIR = join(NODE_MODULES, ".tsmusicbot-backup");
+const STAMP_FILE = join(NODE_MODULES, ".tsmusicbot-abi");
+
 const CDN = process.argv[2] || "https://cdn.npmmirror.com/binaries";
 const PLATFORM = process.platform;
 const ARCH = process.arch;
 const NODE_ABI = process.versions.modules;
+const NODE_MAJOR = Number(process.versions.node.split(".")[0]);
+/** The newest Node major this project is regularly tested against, and the one
+ *  every required addon currently ships a prebuild for. Keep in sync with
+ *  TESTED_NODE_MAJOR in scripts/setup.bat. */
+const TESTED_NODE_MAJOR = 22;

-function download(url) {
+/** Modules the bot cannot start without. ffmpeg-static is optional: a system
+ *  ffmpeg on PATH is a documented fallback, so it only ever produces a WARN. */
+const REQUIRED = new Set(["@discordjs/opus", "better-sqlite3"]);
+
+/** ffmpeg-static ships ~40-90 MB depending on platform; anything under this is
+ *  certainly a truncated download, not a real build. */
+const FFMPEG_MIN_BYTES = 20 * 1024 * 1024;
+
+// ---------------------------------------------------------------------------
+// logging
+// ---------------------------------------------------------------------------
+
+// Progress goes to stderr so setup.bat can show it live while stdout is being
+// appended to setup.log. TSMB_BINARY_LOG_STDOUT=1 mirrors it into stdout so the
+// log keeps the full transcript too.
+const ECHO_STDOUT = process.env.TSMB_BINARY_LOG_STDOUT === "1";
+
+// Both writers swallow a failed write instead of letting it become an uncaught
+// 'error' event: a console that cannot print the Chinese half of a line (issue
+// #152) must not be able to abort a whole setup run. The two streams degrade
+// independently, so setup.log keeps the full bilingual transcript either way.
+const writeErr = createLineWriter(process.stderr);
+const writeOut = createLineWriter(process.stdout);
+
+function log(msg) {
+  const line = msg === "" ? "" : `  [binary] ${msg}`;
+  writeErr(line);
+  if (ECHO_STDOUT) writeOut(line);
+}
+
+// ---------------------------------------------------------------------------
+// small helpers
+// ---------------------------------------------------------------------------
+
+function sizeOf(filePath) {
+  try {
+    return statSync(filePath).size;
+  } catch {
+    return 0;
+  }
+}
+
+function humanSize(filePath) {
+  const bytes = sizeOf(filePath);
+  if (!bytes) return "unknown size";
+  return bytes >= 1024 * 1024
+    ? `${(bytes / 1024 / 1024).toFixed(1)} MB`
+    : `${(bytes / 1024).toFixed(0)} KB`;
+}
+
+function ensureExecutable(filePath) {
+  if (PLATFORM === "win32") return;
+  try {
+    chmodSync(filePath, 0o755);
+  } catch {
+    /* best effort */
+  }
+}
+
+/** Read the version actually present in node_modules (never hardcode it: the
+ *  lockfile can be far ahead of whatever version this script was written for,
+ *  and a wrong version means a 404 on the CDN). */
+function readInstalledVersion(spec) {
+  try {
+    const pkgJson = join(NODE_MODULES, ...spec.split("/"), "package.json");
+    const version = JSON.parse(readFileSync(pkgJson, "utf8")).version;
+    return typeof version === "string" && version ? version : null;
+  } catch {
+    return null;
+  }
+}
+
+function summarizeError(text) {
+  const lines = String(text || "")
+    .split(/\r?\n/)
+    .map((l) => l.trim())
+    .filter(Boolean);
+  const interesting = lines.find((l) => /NODE_MODULE_VERSION|Error:|error:/.test(l));
+  return (interesting || lines[0] || "unknown error").slice(0, 300);
+}
+
+// ---------------------------------------------------------------------------
+// download
+// ---------------------------------------------------------------------------
+
+function download(url, redirects = 0) {
  return new Promise((resolve, reject) => {
    const req = get(url, { timeout: 120000 }, (res) => {
-      if (res.statusCode < 200 || res.statusCode >= 400) {
-        reject(new Error(`HTTP ${res.statusCode}: ${url}`));
+      const { statusCode, headers } = res;
+      if (statusCode >= 300 && statusCode < 400 && headers.location) {
+        res.resume();
+        if (redirects >= 5) {
+          reject(new Error(`too many redirects: ${url}`));
+          return;
+        }
+        resolve(download(new URL(headers.location, url).toString(), redirects + 1));
+        return;
+      }
+      if (statusCode < 200 || statusCode >= 300) {
+        res.resume();
+        reject(new Error(`HTTP ${statusCode}: ${url}`));
        return;
      }
      const chunks = [];
      res.on("data", (c) => chunks.push(c));
+      res.on("error", reject);
      res.on("end", () => resolve(Buffer.concat(chunks)));
    });
    req.on("error", reject);
-    req.on("timeout", () => { req.destroy(); reject(new Error("timeout")); });
+    req.on("timeout", () => {
+      req.destroy();
+      reject(new Error(`timeout: ${url}`));
+    });
  });
 }

-function log(msg) {
-  console.log(`  [binary] ${msg}`);
+let tarModule = null;
+
+/** `tar` is not a declared dependency — it only resolves transitively through
+ *  prebuild-install / @discordjs/node-pre-gyp. Fail with a sentence a user can
+ *  act on instead of a raw MODULE_NOT_FOUND stack. */
+function loadTar() {
+  if (tarModule) return tarModule;
+  try {
+    tarModule = createRequire(import.meta.url)("tar");
+  } catch {
+    throw new Error(
+      "'tar' module not available / 找不到 tar 模块 — run `npm install tar` in the project root and retry",
+    );
+  }
+  return tarModule;
 }

-function isValidSize(filePath, minBytes) {
-  try { return statSync(filePath).size >= minBytes; } catch { return false; }
+async function extractTarGz(buf, cwd) {
+  const tar = loadTar();
+  const tmpFile = join(tmpdir(), `tsmb-${process.pid}-${Date.now()}.tar.gz`);
+  writeFileSync(tmpFile, buf);
+  try {
+    await tar.extract({ cwd, file: tmpFile });
+  } finally {
+    try {
+      rmSync(tmpFile, { force: true });
+    } catch {
+      /* ignore */
+    }
+  }
 }

-async function downloadFfmpeg() {
-  const ffDir = join(ROOT, "node_modules", "ffmpeg-static");
+// ---------------------------------------------------------------------------
+// load probe (the whole point of this rewrite)
+// ---------------------------------------------------------------------------
+
+/**
+ * The snippet that actually forces each package's addon to be dlopen()ed.
+ * NOTE: better-sqlite3 loads its .node lazily, inside the Database constructor
+ * (lib/database.js: `DEFAULT_ADDON || (DEFAULT_ADDON = require('bindings')(...))`),
+ * so a bare `require('better-sqlite3')` succeeds even against a wrong-ABI binary.
+ * Opening an in-memory database is the cheapest way to really load it.
+ */
+const PROBE_EXPR = {
+  "@discordjs/opus": "require('@discordjs/opus')",
+  "better-sqlite3": "new (require('better-sqlite3'))(':memory:').close()",
+};
+
+/**
+ * Try to load a package in a throwaway child process.
+ * Child process on purpose: loading an addon here would keep the DLL mapped and
+ * Windows would then refuse to rename/delete the file we are about to replace.
+ */
+function probeRequire(spec) {
+  const expr = PROBE_EXPR[spec] || `require(${JSON.stringify(spec)})`;
+  try {
+    execFileSync(process.execPath, ["-e", expr], {
+      cwd: ROOT,
+      stdio: "pipe",
+      timeout: 120000,
+      windowsHide: true,
+    });
+    return { ok: true };
+  } catch (err) {
+    const text = [err.stderr && err.stderr.toString(), err.message].filter(Boolean).join("\n");
+    // "...compiled against ... NODE_MODULE_VERSION 137. This version of Node.js
+    //  requires NODE_MODULE_VERSION 127..."  -> first number is what it was built for.
+    const abis = [...text.matchAll(/NODE_MODULE_VERSION (\d+)/g)].map((m) => m[1]);
+    return {
+      ok: false,
+      abiMismatch: abis.length >= 2,
+      compiledAbi: abis.length >= 2 ? abis[0] : null,
+      error: summarizeError(text),
+    };
+  }
+}
+
+function describeProbe(probe) {
+  if (probe.abiMismatch) {
+    return `built for Node ABI ${probe.compiledAbi}, but this Node needs ABI ${NODE_ABI}`;
+  }
+  return probe.error;
+}
+
+function probeFfmpegBinary(bin) {
+  try {
+    const out = execFileSync(bin, ["-version"], {
+      stdio: "pipe",
+      timeout: 30000,
+      windowsHide: true,
+    }).toString();
+    return { ok: true, version: (out.split(/\r?\n/)[0] || "").slice(0, 60) };
+  } catch (err) {
+    const text = [err.stderr && err.stderr.toString(), err.message].filter(Boolean).join("\n");
+    return { ok: false, error: summarizeError(text) };
+  }
+}
+
+// ---------------------------------------------------------------------------
+// atomic swap helpers
+// ---------------------------------------------------------------------------
+
+let stashCounter = 0;
+
+/**
+ * Move `target` (file or directory) out of the way into node_modules/.tsmusicbot-backup.
+ * Same volume as node_modules, so the rename is atomic, and outside the package's
+ * build/ tree so that `npm rebuild` / `node-gyp clean` cannot wipe the backup.
+ * Returns { commit, restore } — call exactly one of them.
+ */
+/** Windows likes to hold a brief lock on a freshly written .node (antivirus,
+ *  indexer), and rmSync does not retry by default. */
+const RM_OPTS = { recursive: true, force: true, maxRetries: 5, retryDelay: 150 };
+
+function stash(target) {
+  if (!existsSync(target)) {
+    return { commit() {}, restore() {} };
+  }
+  mkdirSync(BACKUP_DIR, { recursive: true });
+  const backup = join(BACKUP_DIR, `${basename(target)}.${process.pid}.${stashCounter++}.bak`);
+  rmSync(backup, RM_OPTS);
+  renameSync(target, backup);
+  // The backup filename alone cannot say where the artifact came from, and a
+  // run that is killed (Ctrl+C during a slow download) never reaches commit or
+  // restore. Record the target so the next run can put it back — see
+  // recoverOrphanedBackups().
+  const manifest = `${backup}.json`;
+  try {
+    writeFileSync(manifest, `${JSON.stringify({ target })}\n`);
+  } catch {
+    /* recovery is best-effort; the swap itself still works */
+  }
+
+  let settled = false;
+  const dropManifest = () => {
+    try {
+      rmSync(manifest, RM_OPTS);
+    } catch {
+      /* ignore */
+    }
+  };
+  return {
+    commit() {
+      if (settled) return;
+      settled = true;
+      try {
+        rmSync(backup, RM_OPTS);
+      } catch {
+        /* leftover backup is harmless */
+      }
+      dropManifest();
+    },
+    restore() {
+      if (settled) return;
+      settled = true;
+      try {
+        rmSync(target, RM_OPTS);
+        mkdirSync(dirname(target), { recursive: true });
+        renameSync(backup, target);
+        dropManifest();
+        log(`restored the previous ${basename(target)} — nothing was made worse`);
+      } catch (err) {
+        // Leave the backup AND its manifest in place: recoverOrphanedBackups()
+        // on the next run is the second chance.
+        log(`WARN: could not restore ${target} from ${backup}: ${err.message}`);
+        log(`WARN: the previous file is still at ${backup} — the next run will try again`);
+      }
+    },
+  };
+}
+
+/**
+ * Put back anything a previous run stashed but never restored — a run killed
+ * mid-download, or one whose restore() itself failed. Only acts when the target
+ * is currently absent, so it can never clobber a good binary.
+ */
+function recoverOrphanedBackups() {
+  if (!existsSync(BACKUP_DIR)) return;
+  let entries;
+  try {
+    entries = readdirSync(BACKUP_DIR);
+  } catch {
+    return;
+  }
+  for (const entry of entries) {
+    if (!entry.endsWith(".json")) continue;
+    const manifest = join(BACKUP_DIR, entry);
+    const backup = manifest.slice(0, -".json".length);
+    try {
+      const { target } = JSON.parse(readFileSync(manifest, "utf8"));
+      if (!target || !existsSync(backup)) {
+        rmSync(manifest, RM_OPTS);
+        continue;
+      }
+      if (existsSync(target)) continue; // a good file is already there — leave it alone
+      mkdirSync(dirname(target), { recursive: true });
+      renameSync(backup, target);
+      rmSync(manifest, RM_OPTS);
+      log(`recovered ${basename(target)} left behind by an interrupted run`);
+    } catch (err) {
+      log(`WARN: could not process leftover backup ${entry}: ${err.message}`);
+    }
+  }
+}
+
+function cleanupBackupDir() {
+  try {
+    if (existsSync(BACKUP_DIR) && readdirSync(BACKUP_DIR).length === 0) {
+      rmSync(BACKUP_DIR, { recursive: true, force: true });
+    }
+  } catch {
+    /* ignore */
+  }
+}
+
+// ---------------------------------------------------------------------------
+// per-module results
+// ---------------------------------------------------------------------------
+
+/** status: "ok" | "repaired" | "failed" | "missing" */
+function makeResult(name, status, detail) {
+  return { name, required: REQUIRED.has(name), status, detail };
+}
+
+function buildFromSource(command) {
+  // stdout -> inherited (setup.bat sends it to the log), stderr -> inherited so
+  // compiler progress stays visible; npm's own output is far too noisy to buffer.
+  execSync(command, { cwd: ROOT, stdio: ["ignore", "inherit", "inherit"] });
+}
+
+/**
+ * A 404 from the CDN is not a mirror outage: it means this exact package
+ * version publishes no prebuilt binary for the running Node ABI at all.
+ * @discordjs/opus 0.10.0 has no build for Node 24 (ABI 137), so a user on that
+ * major lands in the source-build fallback below and is told to install Python
+ * and a C++ toolchain. Switching Node major is the far cheaper fix, and nothing
+ * else in this output points at it. (better-sqlite3 dropping its Node 20 / ABI
+ * 115 builds in 12.10.0 is why Node 20 is no longer accepted at all.)
+ * See issue #152.
+ */
+function explainMissingPrebuild(name, version, err) {
+  if (!/HTTP 404/.test(err.message)) return;
+  log(`${name}: ${name}@${version} ships no prebuilt binary for Node ${NODE_MAJOR} (ABI ${NODE_ABI})`);
+  log(
+    `${name}: Node ${TESTED_NODE_MAJOR} LTS has one — switching Node is usually much quicker than ` +
+      `setting up a compiler (换用 Node ${TESTED_NODE_MAJOR} LTS 通常比装编译环境快得多)`,
+  );
+}
+
+function buildToolsHint() {
+  log("Install build tools first:");
+  log("  Windows: npm install --global windows-build-tools  (或安装 Visual Studio Build Tools + Python)");
+  log("  Ubuntu/Debian: sudo apt install build-essential python3");
+  log("  CentOS/RHEL:   sudo yum groupinstall 'Development Tools'");
+}
+
+// ---------------------------------------------------------------------------
+// ffmpeg-static (OPTIONAL — a system ffmpeg is a documented fallback)
+// ---------------------------------------------------------------------------
+
+async function ensureFfmpeg() {
+  const name = "ffmpeg-static";
+  const ffDir = join(NODE_MODULES, name);
  const ffName = PLATFORM === "win32" ? "ffmpeg.exe" : "ffmpeg";
  const ffDest = join(ffDir, ffName);

-  if (!existsSync(ffDir)) { log("ffmpeg-static not installed, skipping"); return false; }
-  if (existsSync(ffDest)) {
-    if (isValidSize(ffDest, 50 * 1024 * 1024)) {
-      log("ffmpeg already exists, skipping");
-      return true;
+  if (!existsSync(ffDir)) {
+    log(`${name}: package not installed, skipping (a system ffmpeg on PATH also works)`);
+    return makeResult(name, "missing", "package not installed");
+  }
+
+  if (existsSync(ffDest) && sizeOf(ffDest) >= FFMPEG_MIN_BYTES) {
+    ensureExecutable(ffDest);
+    const probe = probeFfmpegBinary(ffDest);
+    if (probe.ok) {
+      log(`${name}: OK (${humanSize(ffDest)}, ${probe.version})`);
+      return makeResult(name, "ok", humanSize(ffDest));
    }
-    log("ffmpeg exists but seems corrupted (too small), re-downloading...");
+    // Deliberately NOT re-downloading here: ffmpeg is a plain executable with no
+    // ABI to mismatch, and forcing an ~80 MB re-download because `-version`
+    // could not be spawned would hurt exactly the slow-network users this
+    // script exists for.
+    log(`${name}: present (${humanSize(ffDest)}) but could not be executed: ${probe.error}`);
+    return makeResult(name, "ok", "present, not verified");
+  }
+
+  if (existsSync(ffDest)) {
+    log(`${name}: existing ffmpeg looks truncated (${humanSize(ffDest)}), re-downloading...`);
+  } else {
+    log(`${name}: ffmpeg binary missing, downloading...`);
  }

  const url = `${CDN}/ffmpeg-static/b6.1.1/ffmpeg-${PLATFORM}-${ARCH}.gz`;
-  log("Downloading ffmpeg...");
-  const buf = await download(url);
-  await pipeline(Readable.from(buf), createGunzip(), createWriteStream(ffDest));
-  try { execSync(`chmod +x "${ffDest}"`); } catch {}
-  const size = ((await statSync(ffDest)).size / 1024 / 1024).toFixed(1);
-  log(`ffmpeg OK (${size} MB)`);
-  return true;
-}
-
-async function downloadOpus() {
-  const opusDir = join(ROOT, "node_modules", "@discordjs", "opus");
-  const prebuildName = `node-v${NODE_ABI}-napi-v3-${PLATFORM}-${ARCH}-unknown-unknown`;
-  const opusDest = join(opusDir, "prebuild", prebuildName, "opus.node");
-
-  if (!existsSync(opusDir)) { log("@discordjs/opus not installed, skipping"); return false; }
-  if (existsSync(opusDest)) {
-    if (isValidSize(opusDest, 100 * 1024)) {
-      log("@discordjs/opus already exists, skipping");
-      return true;
-    }
-    log("@discordjs/opus exists but seems corrupted (too small), re-downloading...");
-  }
-
-  const url = `${CDN}/@discordjs/opus/v0.10.0/opus-v0.10.0-node-v${NODE_ABI}-napi-v3-${PLATFORM}-${ARCH}-unknown-unknown.tar.gz`;
-  log("Downloading @discordjs/opus...");
+  const backup = stash(ffDest);
+  const tmpDest = `${ffDest}.tsmb-tmp-${process.pid}`;
  try {
+    log(`${name}: GET ${url}  (~80 MB, 这一步比较慢,请耐心等待)`);
    const buf = await download(url);
-    mkdirSync(dirname(opusDest), { recursive: true });
-    const require = createRequire(import.meta.url);
-    const tar = require("tar");
-    const tmpFile = join(tmpdir(), `discordjs-opus-${Date.now()}.tar.gz`);
-    writeFileSync(tmpFile, buf);
-    await tar.extract({ cwd: join(opusDir, "prebuild"), file: tmpFile });
-    log("@discordjs/opus OK");
-    return true;
+    await pipeline(Readable.from(buf), createGunzip(), createWriteStream(tmpDest));
+    ensureExecutable(tmpDest);
+    if (sizeOf(tmpDest) < FFMPEG_MIN_BYTES) {
+      throw new Error(`downloaded ffmpeg is only ${humanSize(tmpDest)} — truncated`);
+    }
+    renameSync(tmpDest, ffDest); // atomic swap, same directory
+    backup.commit();
+    log(`${name}: OK (${humanSize(ffDest)})`);
+    return makeResult(name, "repaired", humanSize(ffDest));
  } catch (err) {
-    log(`CDN download failed (${err.message}), trying to build from source...`);
    try {
-      execSync("npm rebuild @discordjs/opus", { cwd: ROOT, stdio: "inherit" });
-      if (existsSync(opusDest) && isValidSize(opusDest, 100 * 1024)) {
-        log("@discordjs/opus built from source OK");
-        return true;
+      rmSync(tmpDest, { force: true });
+    } catch {
+      /* ignore */
+    }
+    backup.restore();
+    log(`${name}: download failed — ${err.message}`);
+    log(`${name}: not fatal — install ffmpeg system-wide and put it on PATH instead`);
+    return makeResult(name, "failed", err.message);
+  }
+}
+
+// ---------------------------------------------------------------------------
+// @discordjs/opus (REQUIRED)
+// ---------------------------------------------------------------------------
+
+async function ensureOpus() {
+  const name = "@discordjs/opus";
+  const pkgDir = join(NODE_MODULES, "@discordjs", "opus");
+  const prebuildRoot = join(pkgDir, "prebuild");
+  // node-pre-gyp resolves this directory from the *running* Node's ABI, so a
+  // stale build for another ABI simply sits at another path and is ignored.
+  const prebuildDirName = `node-v${NODE_ABI}-napi-v3-${PLATFORM}-${ARCH}-unknown-unknown`;
+  const destDir = join(prebuildRoot, prebuildDirName);
+
+  if (!existsSync(pkgDir)) {
+    log(`${name}: package not installed — run 'npm install' first`);
+    return makeResult(name, "missing", "package not installed");
+  }
+
+  const before = probeRequire(name);
+  if (before.ok) {
+    log(`${name}: OK (loads under ${process.version}, ABI ${NODE_ABI})`);
+    return makeResult(name, "ok", `ABI ${NODE_ABI}`);
+  }
+  log(`${name}: unusable — ${describeProbe(before)}`);
+  log(`${name}: installing a build for ABI ${NODE_ABI}...`);
+
+  const version = readInstalledVersion(name) || "0.10.0";
+  const url =
+    `${CDN}/@discordjs/opus/v${version}/opus-v${version}` +
+    `-node-v${NODE_ABI}-napi-v3-${PLATFORM}-${ARCH}-unknown-unknown.tar.gz`;
+
+  const backup = stash(destDir);
+  let staging = null;
+  try {
+    try {
+      log(`${name}: GET ${url}`);
+      const buf = await download(url);
+      staging = mkdtempSync(join(pkgDir, ".tsmb-staging-"));
+      await extractTarGz(buf, staging);
+      const staged = join(staging, prebuildDirName);
+      if (!existsSync(join(staged, "opus.node"))) {
+        throw new Error(`tarball did not contain ${prebuildDirName}/opus.node`);
+      }
+      mkdirSync(prebuildRoot, { recursive: true });
+      rmSync(destDir, { recursive: true, force: true });
+      renameSync(staged, destDir); // atomic swap, same volume
+      log(`${name}: prebuilt binary installed`);
+    } catch (cdnErr) {
+      log(`${name}: CDN install failed (${cdnErr.message})`);
+      explainMissingPrebuild(name, version, cdnErr);
+      log(`${name}: falling back to a source build — 'npm rebuild ${name}' (可能需要几分钟)`);
+      buildFromSource(`npm rebuild ${name}`);
+    }
+
+    const after = probeRequire(name);
+    if (!after.ok) throw new Error(describeProbe(after));
+    backup.commit();
+    log(`${name}: repaired, now loads under ${process.version} (ABI ${NODE_ABI})`);
+    return makeResult(name, "repaired", `ABI ${NODE_ABI}`);
+  } catch (err) {
+    backup.restore();
+    log(`${name}: FAILED — ${err.message}`);
+    buildToolsHint();
+    return makeResult(name, "failed", err.message);
+  } finally {
+    if (staging) {
+      try {
+        rmSync(staging, { recursive: true, force: true });
+      } catch {
+        /* ignore */
      }
-      log("Source build completed but .node file not found");
-      return false;
-    } catch (buildErr) {
-      log(`Source build failed: ${buildErr.message}`);
-      log("Install build tools: sudo apt install build-essential (Ubuntu/Debian)");
-      log("                    sudo yum groupinstall 'Development Tools' (CentOS/RHEL)");
-      return false;
    }
  }
 }

-async function downloadBetterSqlite3() {
-  const pkgDir = join(ROOT, "node_modules", "better-sqlite3");
+// ---------------------------------------------------------------------------
+// better-sqlite3 (REQUIRED) — the module the ABI bug actually bites
+// ---------------------------------------------------------------------------
+
+async function ensureBetterSqlite3() {
+  const name = "better-sqlite3";
+  const pkgDir = join(NODE_MODULES, name);
  const dest = join(pkgDir, "build", "Release", "better_sqlite3.node");

-  if (!existsSync(pkgDir)) { log("better-sqlite3 not installed, skipping"); return false; }
-  if (existsSync(dest)) {
-    if (isValidSize(dest, 500 * 1024)) {
-      log("better-sqlite3 already exists, skipping");
-      return true;
-    }
-    log("better-sqlite3 exists but seems corrupted (too small), re-downloading...");
+  if (!existsSync(pkgDir)) {
+    log(`${name}: package not installed — run 'npm install' first`);
+    return makeResult(name, "missing", "package not installed");
  }

-  const version = "12.8.0";
-  const url = `${CDN}/better-sqlite3/v${version}/better-sqlite3-v${version}-node-v${NODE_ABI}-${PLATFORM}-${ARCH}.tar.gz`;
-  log("Downloading better-sqlite3...");
-  const buf = await download(url);
-  const require = createRequire(import.meta.url);
-  const tar = require("tar");
-  const tmpFile = join(tmpdir(), `better-sqlite3-${Date.now()}.tar.gz`);
-  writeFileSync(tmpFile, buf);
-  mkdirSync(dirname(dest), { recursive: true });
-  await tar.extract({ cwd: pkgDir, file: tmpFile });
-  if (existsSync(dest)) {
-    log(`better-sqlite3 OK (${((await statSync(dest)).size / 1024).toFixed(0)} KB)`);
-    return true;
+  const before = probeRequire(name);
+  if (before.ok) {
+    log(`${name}: OK (loads under ${process.version}, ABI ${NODE_ABI})`);
+    return makeResult(name, "ok", `ABI ${NODE_ABI}`);
+  }
+  // This is the case the old size check could not see: the file is there, it is
+  // ~1.9 MB, and it is completely useless because it targets another ABI.
+  log(`${name}: unusable — ${describeProbe(before)}`);
+  log(`${name}: replacing the native binary with a build for ABI ${NODE_ABI}...`);
+
+  const version = readInstalledVersion(name) || "12.11.1";
+  const url = `${CDN}/${name}/v${version}/${name}-v${version}-node-v${NODE_ABI}-${PLATFORM}-${ARCH}.tar.gz`;
+
+  const backup = stash(dest);
+  let staging = null;
+  try {
+    try {
+      log(`${name}: GET ${url}`);
+      const buf = await download(url);
+      staging = mkdtempSync(join(pkgDir, ".tsmb-staging-"));
+      await extractTarGz(buf, staging);
+      const staged = join(staging, "build", "Release", "better_sqlite3.node");
+      if (!existsSync(staged)) {
+        throw new Error("tarball did not contain build/Release/better_sqlite3.node");
+      }
+      mkdirSync(dirname(dest), { recursive: true });
+      rmSync(dest, { force: true });
+      renameSync(staged, dest); // atomic swap, same volume
+      log(`${name}: prebuilt binary installed (${humanSize(dest)})`);
+    } catch (cdnErr) {
+      log(`${name}: CDN install failed (${cdnErr.message})`);
+      explainMissingPrebuild(name, version, cdnErr);
+      log(`${name}: falling back to a source build — 'npm rebuild ${name} --build-from-source' (可能需要几分钟)`);
+      buildFromSource(`npm rebuild ${name} --build-from-source`);
+    }
+
+    const after = probeRequire(name);
+    if (!after.ok) throw new Error(describeProbe(after));
+    backup.commit();
+    log(`${name}: repaired, now loads under ${process.version} (ABI ${NODE_ABI}, ${humanSize(dest)})`);
+    return makeResult(name, "repaired", `ABI ${NODE_ABI}`);
+  } catch (err) {
+    backup.restore();
+    log(`${name}: FAILED — ${err.message}`);
+    buildToolsHint();
+    return makeResult(name, "failed", err.message);
+  } finally {
+    if (staging) {
+      try {
+        rmSync(staging, { recursive: true, force: true });
+      } catch {
+        /* ignore */
+      }
+    }
  }
-  log("better-sqlite3 extracted but .node file not found at expected path");
-  return false;
 }

+// ---------------------------------------------------------------------------
+// stamp
+// ---------------------------------------------------------------------------
+
+/** Record which ABI this install was built for. Lives inside node_modules so it
+ *  dies together with the thing it describes. check-native.mjs reads it. */
+function writeStamp(results) {
+  if (!existsSync(NODE_MODULES)) return;
+  const stamp = {
+    abi: NODE_ABI,
+    nodeVersion: process.version,
+    platform: PLATFORM,
+    arch: ARCH,
+    updatedAt: new Date().toISOString(),
+    modules: Object.fromEntries(results.map((r) => [r.name, r.status])),
+  };
+  try {
+    writeFileSync(STAMP_FILE, `${JSON.stringify(stamp, null, 2)}\n`);
+    log(`ABI stamp written: node_modules/.tsmusicbot-abi (Node ${process.version}, ABI ${NODE_ABI})`);
+  } catch (err) {
+    log(`WARN: could not write ABI stamp: ${err.message}`);
+  }
+}
+
+// ---------------------------------------------------------------------------
+// main
+// ---------------------------------------------------------------------------
+
+const STEPS = [
+  ["ffmpeg-static", ensureFfmpeg],
+  ["@discordjs/opus", ensureOpus],
+  ["better-sqlite3", ensureBetterSqlite3],
+];
+
 try {
-  const results = await Promise.all([downloadFfmpeg(), downloadOpus(), downloadBetterSqlite3()]);
-  if (results.some(Boolean)) {
-    console.log("  [binary] All downloads complete");
+  log(`Node ${process.version} (ABI ${NODE_ABI}), ${PLATFORM}-${ARCH}, CDN ${CDN}`);
+
+  recoverOrphanedBackups();
+
+  // STRICTLY SEQUENTIAL, and it has to stay that way. The source-build fallback
+  // shells out through execSync, which parks the event loop for minutes; the
+  // 120s timeout that download() arms is a socket-INACTIVITY timer sitting on
+  // that same loop. Run these concurrently and the first module to fall back to
+  // a source build kills every download still in flight — the connection is
+  // healthy, the timer just never got a chance to be reset. That is not a rare
+  // race: @discordjs/opus 0.10.0 has no prebuild for ABI 137, so on Node 24 that
+  // module 404s within ~100ms and starts building while ffmpeg's ~80MB download
+  // is still going. ffmpeg is optional,
+  // so the spurious failure used to be swallowed as a WARN and setup still
+  // reported success — leaving the user with no ffmpeg and no working playback.
+  // Nothing here benefits from overlap anyway: every probe is execFileSync.
+  const results = [];
+  for (const [name, run] of STEPS) {
+    try {
+      results.push(await run());
+    } catch (err) {
+      results.push(makeResult(name, "failed", err?.message ?? String(err)));
+    }
+  }
+
+  cleanupBackupDir();
+
+  log("");
+  log(`Summary — Node ${process.version} / ABI ${NODE_ABI} / ${PLATFORM}-${ARCH}:`);
+  for (const r of results) {
+    const tag =
+      r.status === "ok"
+        ? "OK"
+        : r.status === "repaired"
+          ? "REPAIRED"
+          : r.required
+            ? "FAILED"
+            : "WARN (optional)";
+    log(`  - ${r.name.padEnd(17)} ${tag}${r.detail ? `  ${r.detail}` : ""}`);
+  }
+
+  const broken = results.filter(
+    (r) => r.required && r.status !== "ok" && r.status !== "repaired",
+  );
+  // Only stamp a build that actually succeeded. The stamp says "node_modules is
+  // built for ABI X"; writing it after a failed repair would have check-native
+  // print a reassuring "built with ABI 137" right above its own "this module is
+  // built for ABI 127" complaint.
+  if (broken.length === 0) writeStamp(results);
+  // process.exitCode rather than process.exit(): setup.bat redirects stdout to
+  // setup.log, and process.exit() can drop output that has not flushed yet.
+  if (broken.length > 0) {
+    log("");
+    log(`ERROR: required native module(s) unusable: ${broken.map((r) => r.name).join(", ")}`);
+    log("必需的原生模块不可用,机器人无法启动 —— 请查看上面的错误信息。");
+    process.exitCode = 1;
+  } else {
+    log("All required native modules are ready.");
+    process.exitCode = 0;
  }
 } catch (e) {
-  console.error(`  [binary] ERROR: ${e.message}`);
-  process.exit(1);
+  log(`ERROR: ${e.stack || e.message}`);
+  process.exitCode = 1;
 }
-
@@ -0,0 +1,142 @@
+/**
+ * Crash-proof line logging for the setup scripts.
+ *
+ * WHY THIS EXISTS (issue #152)
+ * ----------------------------
+ * setup.bat runs `chcp 65001` and shows progress on stderr. Some Windows
+ * consoles - Windows Server 2012 R2 above all - cannot render non-ASCII text in
+ * that code page and the OS fails the write with EIO. `process.stderr` is an
+ * ordinary stream, so that EIO arrives as an 'error' event, and a stream with
+ * no 'error' listener rethrows it as an uncaught exception:
+ *
+ *     Error: write EIO
+ *         at afterWriteDispatched (node:internal/stream_base_commons:159:15)
+ *         ...
+ *         at log (scripts/download-binaries.mjs:84:18)
+ *         at ensureFfmpeg (scripts/download-binaries.mjs:451:5)
+ *
+ * That is setup killing itself inside its own progress logging, on the first
+ * line of the run that happened to contain Chinese - nothing was wrong with the
+ * download it was about to start.
+ *
+ * So: listen for the error and degrade instead of dying.
+ *   full  -> ascii : drop the CJK the console choked on, keep the English half
+ *   ascii -> off   : the stream is simply gone (closed pipe) - stay quiet
+ * Each stream degrades on its own, so a console that gives up does not cost
+ * setup.log its full bilingual transcript: that stdout is a redirected file.
+ */
+
+const HAS_NON_ASCII = /[^\x00-\x7F]/;
+
+/** Placeholders for a removed run: one that separated words, one that did not. */
+const SPACED = "\u0000";
+const TIGHT = "\u0001";
+
+/** Punctuation the bilingual strings use that has an obvious ASCII twin. */
+const PUNCTUATION = new Map(
+  Object.entries({
+    "—": "-",
+    "–": "-",
+    "…": "...",
+    "“": '"',
+    "”": '"',
+    "‘": "'",
+    "’": "'",
+    "，": ",",
+    "。": ".",
+    "、": ",",
+    "：": ":",
+    "；": ";",
+    "（": "(",
+    "）": ")",
+    "！": "!",
+    "？": "?",
+    "←": "<-",
+    "→": "->",
+    "×": "x",
+  }),
+);
+
+/**
+ * Best-effort ASCII rendering of a log line, for a console that cannot print
+ * anything else. Returns null when nothing worth printing survives - every
+ * Chinese-only line in these scripts sits directly beside an English line
+ * saying the same thing, so dropping it loses no information.
+ */
+export function toAsciiFallback(text) {
+  if (!HAS_NON_ASCII.test(text)) return text;
+
+  let out = "";
+  for (const ch of text) out += PUNCTUATION.get(ch) ?? ch;
+
+  out = out
+    .replace(/[\u0000\u0001]/g, "")
+    // Mark each removed run rather than just deleting it, so the tidy-up below
+    // can tell "a separator that introduced text we dropped" from "a separator
+    // that belongs to the English half". SPACED was holding two ASCII words
+    // apart; TIGHT was hugging a bracket or a comma.
+    .replace(/[ \t]*[^\x00-\x7F]+[ \t]*/g, (run) =>
+      /^[ \t]/.test(run) && /[ \t]$/.test(run) ? SPACED : TIGHT,
+    )
+    // "(可能需要几分钟)" — the parentheses held nothing else.
+    .replace(/[ \t]*\([ \t]*(?:[\u0000\u0001][ \t]*)+\)/g, "")
+    // "FAILED — 编译失败", "(~80 MB, 请耐心等待)" — drop the trailing marks along
+    // with the separators that were only ever there to introduce them.
+    .replace(/[ \t]*[-,;:]*[ \t]*(?:[\u0000\u0001][ \t,;:-]*)+(?=[)\]]|$)/gm, "")
+    .replace(/\u0000/g, " ")
+    .replace(/\u0001/g, "")
+    .replace(/[ \t]+$/gm, "");
+
+  return /[A-Za-z0-9]/.test(out) ? out : null;
+}
+
+/** One degradation state per stream, shared by every writer built on it. */
+const guards = new WeakMap();
+
+function guardFor(stream) {
+  const existing = guards.get(stream);
+  if (existing) return existing;
+
+  const guard = { mode: "full" };
+  guards.set(stream, guard);
+  try {
+    // The whole point: without this listener the next EIO/EPIPE is fatal.
+    stream.on("error", () => degrade(guard));
+  } catch {
+    /* not an EventEmitter - the try/catch around write() still guards us */
+  }
+  return guard;
+}
+
+function degrade(guard) {
+  guard.mode = guard.mode === "full" ? "ascii" : "off";
+}
+
+/**
+ * Build a `writeLine(text)` that appends a newline, never throws, and never
+ * lets a failed console write take the process down with it.
+ * Returns true when the line reached the stream.
+ */
+export function createLineWriter(stream) {
+  const guard = guardFor(stream);
+
+  return function writeLine(text) {
+    if (guard.mode === "off") return false;
+
+    let line = text;
+    if (guard.mode === "ascii") {
+      line = toAsciiFallback(text);
+      if (line === null) return false;
+    }
+
+    try {
+      stream.write(`${line}\n`);
+      return true;
+    } catch {
+      // A synchronous throw (EBADF on a closed handle) never reaches the
+      // 'error' listener, so degrade here too.
+      degrade(guard);
+      return false;
+    }
+  };
+}
@@ -0,0 +1,133 @@
+import { EventEmitter } from "node:events";
+import { describe, expect, it, vi } from "vitest";
+
+import { createLineWriter, toAsciiFallback } from "./console-log.mjs";
+
+/** Stand-in for process.stderr: an EventEmitter with a write() we can steer. */
+function fakeStream() {
+  const stream = new EventEmitter();
+  stream.written = [];
+  stream.throwOnWrite = false;
+  stream.write = (chunk) => {
+    if (stream.throwOnWrite) throw new Error("EBADF");
+    stream.written.push(chunk);
+    return true;
+  };
+  return stream;
+}
+
+describe("toAsciiFallback", () => {
+  it("leaves ASCII lines exactly as they are", () => {
+    const line = "  [binary] better-sqlite3: OK (loads under v22.23.2, ABI 127)";
+    expect(toAsciiFallback(line)).toBe(line);
+    expect(toAsciiFallback("")).toBe("");
+  });
+
+  it("keeps the English half of the line that crashed setup in #152", () => {
+    expect(
+      toAsciiFallback(
+        "  [binary] ffmpeg-static: GET https://cdn/ffmpeg.gz  (~80 MB, 这一步比较慢,请耐心等待)",
+      ),
+    ).toBe("  [binary] ffmpeg-static: GET https://cdn/ffmpeg.gz  (~80 MB)");
+  });
+
+  it("drops parentheses and separators left stranded by the removed text", () => {
+    expect(
+      toAsciiFallback("  [binary] better-sqlite3: falling back — 'npm rebuild' (可能需要几分钟)"),
+    ).toBe("  [binary] better-sqlite3: falling back - 'npm rebuild'");
+    expect(
+      toAsciiFallback("  Windows: npm install --global windows-build-tools  (或安装 VS Build Tools)"),
+    ).toBe("  Windows: npm install --global windows-build-tools  (VS Build Tools)");
+  });
+
+  it("drops a Chinese-only line, which always has an English twin beside it", () => {
+    expect(toAsciiFallback("必需的原生模块不可用,机器人无法启动 —— 请查看上面的错误信息。")).toBeNull();
+  });
+
+  it("preserves the indentation the summary is aligned on, and drops the dangling dash", () => {
+    expect(toAsciiFallback("  - better-sqlite3     FAILED — 编译失败")).toBe(
+      "  - better-sqlite3     FAILED",
+    );
+  });
+
+  it("keeps a separator that belongs to the English half", () => {
+    expect(toAsciiFallback("Summary — Node v22.0.0 / ABI 127 / win32-x64:")).toBe(
+      "Summary - Node v22.0.0 / ABI 127 / win32-x64:",
+    );
+  });
+});
+
+describe("createLineWriter", () => {
+  it("appends a newline and reports the write", () => {
+    const stream = fakeStream();
+    expect(createLineWriter(stream)("hello")).toBe(true);
+    expect(stream.written).toEqual(["hello\n"]);
+  });
+
+  it("survives the EIO that killed setup: an 'error' event must not throw", () => {
+    const stream = fakeStream();
+    createLineWriter(stream);
+    expect(stream.listenerCount("error")).toBe(1);
+    expect(() => stream.emit("error", Object.assign(new Error("write EIO"), { code: "EIO" }))).not.toThrow();
+  });
+
+  it("falls back to ASCII once the console has refused a line", () => {
+    const stream = fakeStream();
+    const write = createLineWriter(stream);
+    write("  [binary] GET https://cdn/ffmpeg.gz  (~80 MB, 这一步比较慢,请耐心等待)");
+    stream.emit("error", new Error("write EIO"));
+    write("  [binary] GET https://cdn/opus.tar.gz  (~1 MB, 这一步比较慢,请耐心等待)");
+    expect(stream.written).toEqual([
+      "  [binary] GET https://cdn/ffmpeg.gz  (~80 MB, 这一步比较慢,请耐心等待)\n",
+      "  [binary] GET https://cdn/opus.tar.gz  (~1 MB)\n",
+    ]);
+  });
+
+  it("goes quiet after a second failure rather than retrying a dead stream", () => {
+    const stream = fakeStream();
+    const write = createLineWriter(stream);
+    stream.emit("error", new Error("write EIO"));
+    stream.emit("error", new Error("write EPIPE"));
+    expect(write("anything at all")).toBe(false);
+    expect(stream.written).toEqual([]);
+  });
+
+  it("degrades on a synchronous throw too, which never reaches the listener", () => {
+    const stream = fakeStream();
+    const write = createLineWriter(stream);
+    stream.throwOnWrite = true;
+    expect(write("  [binary] 下载中 downloading")).toBe(false);
+    stream.throwOnWrite = false;
+    write("  [binary] 下载中 downloading");
+    expect(stream.written).toEqual(["  [binary] downloading\n"]);
+  });
+
+  it("degrades each stream on its own, so setup.log keeps the full transcript", () => {
+    const console_ = fakeStream();
+    const logFile = fakeStream();
+    const writeConsole = createLineWriter(console_);
+    const writeLog = createLineWriter(logFile);
+    console_.emit("error", new Error("write EIO"));
+
+    const line = "  [binary] ffmpeg-static: 下载完成 done";
+    writeConsole(line);
+    writeLog(line);
+
+    expect(console_.written).toEqual(["  [binary] ffmpeg-static: done\n"]);
+    expect(logFile.written).toEqual([`${line}\n`]);
+  });
+
+  it("never installs a second listener for a stream that already has a writer", () => {
+    const stream = fakeStream();
+    createLineWriter(stream);
+    createLineWriter(stream);
+    expect(stream.listenerCount("error")).toBe(1);
+  });
+
+  it("still guards a stream that is not an EventEmitter", () => {
+    const stream = { write: vi.fn(() => { throw new Error("EBADF"); }) };
+    const write = createLineWriter(stream);
+    expect(() => write("line")).not.toThrow();
+    expect(write("line")).toBe(false);
+  });
+});
@@ -10,8 +10,11 @@ title TSMusicBot Setup
 ::  - 自动修复 PowerShell 环境变量
 :: ============================================================

-set "SCRIPT_VERSION=2.1"
-set "MIN_NODE_MAJOR=20"
+set "SCRIPT_VERSION=2.2"
+set "MIN_NODE_MAJOR=22"
+:: Newest Node major this project is regularly tested against. Anything above
+:: still works, it just may have no prebuilt addons and fall back to a source build.
+set "TESTED_NODE_MAJOR=22"
 set "LOG_FILE=%~dp0..\setup.log"
 set "FAILED=0"

@@ -64,13 +67,40 @@ for /f "tokens=1 delims=v." %%a in ("%NODE_VER%") do set "NODE_MAJOR=%%a"
 call :log "Node.js version: %NODE_VER%"
 echo [OK] Node.js found: %NODE_VER%

-if %NODE_MAJOR% LSS %MIN_NODE_MAJOR% (
-    call :error "Node.js version too old. Need %MIN_NODE_MAJOR%+, found %NODE_VER%."
+:: The supported floor is not just a major version, so let node decide.
+:: Node 20 was dropped: better-sqlite3 ships no prebuilt binary for its ABI
+:: (115) since 12.10.0, so every Node 20 install needed Python and a C++
+:: toolchain just to get off the ground (issue #152). The odd majors (21 /
+:: 23) are excluded by better-sqlite3 and vitest.
+:: Keep this in sync with "engines" in package.json.
+node -e "const v=process.versions.node.split('.').map(Number); process.exit((v[0]===22&&v[1]>=12)||v[0]>=24?0:1)"
+if errorlevel 1 (
+    call :error "Node.js %NODE_VER% is not supported. Use Node 22.12+ LTS or newer."
+    echo         Download: https://nodejs.org/  or  https://nodejs.cn/
    pause
    exit /b 1
 )
+
+:: Not fatal: setup now rebuilds the native modules for whatever ABI you run,
+:: so newer Node majors work - they are just slower to install.
+:: NOTE: keep every line inside these parenthesised blocks pure ASCII.
+:: cmd.exe mis-tracks its file offset when a block contains multi-byte UTF-8
+:: characters and starts eating the "echo " prefix of following lines.
+:: Bilingual guidance lives in the Node scripts, which print UTF-8 reliably.
+if %NODE_MAJOR% GTR %TESTED_NODE_MAJOR% (
+    echo [WARN] Node %NODE_VER% is newer than the tested LTS line, Node 22.
+    echo        Newer Node majors may have no prebuilt opus / better-sqlite3,
+    echo        so setup falls back to a source build - slower, needs C++ build tools.
+    echo        Recommended: Node 22 LTS - https://nodejs.org/ or https://nodejs.cn/
+    echo        This is only a warning; setup still builds the binaries for %NODE_VER%.
+    call :log "[WARN] Node major %NODE_MAJOR% is newer than tested LTS %TESTED_NODE_MAJOR%"
+)
 echo.

+:: Native addons are tied to one Node ABI. If node_modules was built by a
+:: different Node major, step 4b below detects it and repairs it.
+call :log "Node ABI for this install: see node_modules\.tsmusicbot-abi after step 4b"
+
 :: ============================================================
 :: Step 2: Check npm
 :: ============================================================
@@ -143,16 +173,40 @@ echo [OK] Backend dependencies installed.
 echo.

 :: ============================================================
-:: Step 4b: Download native binaries from CDN
+:: Step 4b: Verify / download / repair native binaries (ABI aware)
 :: ============================================================
-call :step "4b/7" "Downloading native binaries"
+call :step "4b/7" "Checking native binaries"

-node scripts/download-binaries.mjs %CDN_MIRROR% >>"%LOG_FILE%" 2>&1
-if errorlevel 1 (
-    echo [WARN] Binary download had issues. Check %LOG_FILE% for details.
-) else (
-    echo [OK] Native binaries installed.
+echo Verifying native modules for %NODE_VER% and downloading whatever is missing.
+echo Progress is shown below; the full transcript goes to the log file.
+echo.
+
+:: The .mjs writes progress to stderr and - with TSMB_BINARY_LOG_STDOUT=1 - the
+:: same lines to stdout. Redirecting only stdout therefore keeps the log complete
+:: while the user still sees live progress instead of a frozen window.
+set "TSMB_BINARY_LOG_STDOUT=1"
+node scripts\download-binaries.mjs %CDN_MIRROR% >>"%LOG_FILE%"
+set "BIN_RESULT=!errorlevel!"
+set "TSMB_BINARY_LOG_STDOUT="
+
+:: ASCII only inside these blocks - see the note near the Node version check.
+if not "!BIN_RESULT!"=="0" (
+    set "FAILED=1"
+    call :error "A required native module is unusable - see the [binary] lines above."
+    echo         Required: @discordjs/opus and better-sqlite3.
+    echo         Full log: %LOG_FILE%
 )
+
+if "!FAILED!"=="1" (
+    echo.
+    echo Setup aborted. Fix the problem above and run this script again.
+    call :log "Setup aborted at step 4b"
+    pause
+    exit /b 1
+)
+
+echo [OK] Native binaries ready for %NODE_VER%.
+echo      ABI recorded in node_modules\.tsmusicbot-abi
 echo.

 :: ============================================================
@@ -27,6 +27,28 @@ if ! command -v node &>/dev/null; then
 fi
 echo "[OK] Node.js $(node -v)"

+# Newest Node major this project is regularly tested against. Anything above
+# still works, it just may have no prebuilt addons and fall back to a source build.
+TESTED_NODE_MAJOR=22
+NODE_MAJOR="$(node -p 'process.versions.node.split(".")[0]')"
+
+# The floor is not just a major version, so let node decide. Node 20 was dropped:
+# better-sqlite3 ships no prebuilt binary for its ABI (115) since 12.10.0, so every
+# Node 20 install needed Python and a C++ toolchain just to get off the ground
+# (issue #152). The odd majors (21 / 23) are excluded by better-sqlite3 and vitest.
+# Keep in sync with package.json "engines".
+if ! node -e 'const v=process.versions.node.split(".").map(Number); process.exit((v[0]===22&&v[1]>=12)||v[0]>=24?0:1)'; then
+    echo "[ERROR] Node.js $(node -v) is not supported. Use Node 22.12+ LTS or newer."
+    echo "        https://nodejs.org/  |  https://nodejs.cn/"
+    exit 1
+fi
+if [ "$NODE_MAJOR" -gt "$TESTED_NODE_MAJOR" ]; then
+    echo "[WARN] Node $(node -v) is newer than the tested LTS line (Node 22)."
+    echo "       新版 Node 可能没有现成的 opus / better-sqlite3 预编译包,"
+    echo "       安装时会自动改用源码编译,需要 C/C++ 构建工具,速度较慢。"
+    echo "       This is only a warning - setup builds the binaries for $(node -v) either way."
+fi
+
 if ! command -v npm &>/dev/null; then
    echo "[ERROR] npm not found."
    exit 1
@@ -73,15 +95,30 @@ npm install --registry="$MIRROR_REGISTRY" --ignore-scripts 2>&1 | tee -a "$LOG_F
 echo "[OK] Dependencies installed."
 echo ""

-# ---- Step 2: Download native binaries from CDN ----
-echo "---- 2/5: Downloading native binaries ----"
+# ---- Step 2: Verify / download / repair native binaries (ABI aware) ----
+echo "---- 2/5: Checking native binaries ----"
 echo ""

-if node scripts/download-binaries.mjs $CDN_MIRROR 2>&1 | tee -a "$LOG_FILE"; then
-    echo "[OK] Native binaries installed."
-else
-    echo "[WARN] Some native binaries had issues (will try source build as fallback)."
+# The old `if node ... | tee ...` only printed a [WARN] and carried on, so a
+# broken native module still produced a "Setup Complete!" banner. It also read
+# the *pipeline's* status: `set -o pipefail` above happens to surface node's
+# failure, but a failing `tee` (unwritable log) was indistinguishable from a
+# failing node. PIPESTATUS[0] is exactly node's own exit code, nothing else.
+set +e
+node scripts/download-binaries.mjs $CDN_MIRROR 2>&1 | tee -a "$LOG_FILE"
+BIN_STATUS=${PIPESTATUS[0]}
+set -e
+
+if [ "$BIN_STATUS" -ne 0 ]; then
+    echo ""
+    echo "[ERROR] A required native module (@discordjs/opus / better-sqlite3) is unusable."
+    echo "        必需的原生模块不可用,安装中止。原因见上面的 [binary] 输出。"
+    echo "        Log: $LOG_FILE"
+    exit 1
 fi
+# ffmpeg-static failures are only a WARN inside the script above (a system
+# ffmpeg on PATH is a supported fallback), so reaching here means we are good.
+echo "[OK] Native binaries ready for $(node -v)."
 echo ""

 # ---- Step 3: Install web panel dependencies ----
@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+# Smoke test for issue #51 — run AFTER you start the bot from temp/preview-merge
+# (or from main once both PRs are merged).
+#
+# Usage: ./scripts/smoke_issue51.sh [HOST]
+# Default HOST is http://127.0.0.1:3000
+
+set -e
+HOST="${1:-http://127.0.0.1:3000}"
+PASS=0
+FAIL=0
+note() { echo -e "\n=== $* ==="; }
+ok()   { echo "  [PASS] $*"; PASS=$((PASS+1)); }
+bad()  { echo "  [FAIL] $*"; FAIL=$((FAIL+1)); }
+
+# ---- Album search ----------------------------------------------------------
+note "1. /api/music/search/all returns {songs,albums,playlists}"
+
+RES=$(curl.exe -s "$HOST/api/music/search/all?q=%E5%91%A8%E6%9D%B0%E4%BC%A6") # 周杰伦
+KEYS=$(echo "$RES" | python3 -c "import json,sys;d=json.load(sys.stdin);print(','.join(sorted(d.keys())))")
+if [ "$KEYS" = "albums,playlists,songs" ]; then ok "keys = $KEYS"; else bad "keys = $KEYS (expected albums,playlists,songs)"; fi
+
+NA=$(echo "$RES" | python3 -c "import json,sys;d=json.load(sys.stdin);print(len(d.get('albums',[])))")
+NS=$(echo "$RES" | python3 -c "import json,sys;d=json.load(sys.stdin);print(len(d.get('songs',[])))")
+NP=$(echo "$RES" | python3 -c "import json,sys;d=json.load(sys.stdin);print(len(d.get('playlists',[])))")
+echo "  songs=$NS, albums=$NA, playlists=$NP"
+if [ "$NA" -gt 0 ]; then ok "albums populated"; else bad "albums empty (expected >0 for 周杰伦)"; fi
+if [ "$NS" -gt 0 ]; then ok "songs populated"; fi
+
+# ---- Album detail playback path -------------------------------------------
+note "2. /api/music/album/:id returns songs"
+
+if [ "$NA" -gt 0 ]; then
+  ALBUM_ID=$(echo "$RES" | python3 -c "import json,sys;d=json.load(sys.stdin);a=d['albums'][0];print(a['id'])")
+  PLATFORM=$(echo "$RES" | python3 -c "import json,sys;d=json.load(sys.stdin);a=d['albums'][0];print(a['platform'])")
+  echo "  testing album id=$ALBUM_ID platform=$PLATFORM"
+  ASONGS=$(curl.exe -s "$HOST/api/music/album/$ALBUM_ID?platform=$PLATFORM" | python3 -c "import json,sys;d=json.load(sys.stdin);print(len(d.get('songs',[])))" 2>/dev/null || echo 0)
+  if [ "$ASONGS" -gt 0 ]; then ok "album returned $ASONGS songs"; else bad "album endpoint returned 0 songs"; fi
+else
+  echo "  (skipped — no albums to test)"
+fi
+
+# ---- Avatar API ------------------------------------------------------------
+note "3. avatar GET 404 on bot with no avatar"
+
+BOT_ID=$(curl.exe -s "$HOST/api/bot" | python3 -c "import json,sys;d=json.load(sys.stdin);bots=d.get('bots',[]);print(bots[0]['id'] if bots else '')")
+if [ -z "$BOT_ID" ]; then bad "no bot found — create a bot first"; exit 1; fi
+echo "  using bot $BOT_ID"
+
+curl.exe -s -o /dev/null -w "%{http_code}" "$HOST/api/bot/$BOT_ID/avatar" > /tmp/code
+CODE=$(cat /tmp/code)
+if [ "$CODE" = "404" ] || [ "$CODE" = "200" ]; then ok "GET initial state = $CODE"; else bad "unexpected GET status $CODE"; fi
+
+note "4. avatar PUT 200 + GET 200 round-trip"
+# 1×1 transparent PNG (67 bytes)
+TINY_PNG_B64="iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII="
+PUT_RES=$(curl.exe -s -X PUT "$HOST/api/bot/$BOT_ID/avatar" -H "Content-Type: application/json" \
+  -d "{\"dataUrl\":\"data:image/png;base64,$TINY_PNG_B64\"}")
+echo "  PUT response: $PUT_RES"
+GOT_PATH=$(echo "$PUT_RES" | python3 -c "import json,sys;d=json.load(sys.stdin);print(d.get('path',''))" 2>/dev/null || echo "")
+if [ "$GOT_PATH" = "$BOT_ID.png" ]; then ok "PUT returned path=$GOT_PATH"; else bad "PUT path = $GOT_PATH (expected $BOT_ID.png)"; fi
+
+curl.exe -s -o /tmp/avatar_check.png -w "%{http_code}" "$HOST/api/bot/$BOT_ID/avatar" > /tmp/code
+CODE=$(cat /tmp/code)
+SIZE=$(wc -c < /tmp/avatar_check.png)
+if [ "$CODE" = "200" ] && [ "$SIZE" -gt 60 ]; then ok "GET returned 200, $SIZE bytes"; else bad "GET status=$CODE size=$SIZE"; fi
+
+note "5. avatar DELETE 204 + GET 404"
+curl.exe -s -X DELETE "$HOST/api/bot/$BOT_ID/avatar" -o /dev/null -w "%{http_code}" > /tmp/code
+CODE=$(cat /tmp/code)
+if [ "$CODE" = "204" ]; then ok "DELETE returned 204"; else bad "DELETE status = $CODE"; fi
+
+curl.exe -s -o /dev/null -w "%{http_code}" "$HOST/api/bot/$BOT_ID/avatar" > /tmp/code
+CODE=$(cat /tmp/code)
+if [ "$CODE" = "404" ]; then ok "GET after DELETE returned 404"; else bad "GET after DELETE = $CODE"; fi
+
+note "6. avatar PUT rejects oversize (>200KB)"
+BIG_B64=$(node -e "console.log(Buffer.alloc(210*1024,7).toString('base64'))")
+curl.exe -s -o /dev/null -w "%{http_code}" -X PUT "$HOST/api/bot/$BOT_ID/avatar" \
+  -H "Content-Type: application/json" -d "{\"dataUrl\":\"data:image/png;base64,$BIG_B64\"}" > /tmp/code
+CODE=$(cat /tmp/code)
+if [ "$CODE" = "413" ]; then ok "oversize rejected with 413"; else bad "oversize status = $CODE (expected 413)"; fi
+
+note "7. avatar PUT rejects bad MIME (image/gif)"
+GIF_B64="R0lGODlhAQABAAAAACw="  # tiny gif
+curl.exe -s -o /dev/null -w "%{http_code}" -X PUT "$HOST/api/bot/$BOT_ID/avatar" \
+  -H "Content-Type: application/json" -d "{\"dataUrl\":\"data:image/gif;base64,$GIF_B64\"}" > /tmp/code
+CODE=$(cat /tmp/code)
+if [ "$CODE" = "400" ]; then ok "bad MIME rejected with 400"; else bad "bad MIME status = $CODE (expected 400)"; fi
+
+# ---------------------------------------------------------------------------
+echo ""
+echo "============================================="
+echo "SMOKE RESULT: $PASS passed, $FAIL failed"
+echo "============================================="
+[ "$FAIL" -eq 0 ]
@@ -29,6 +29,19 @@ if not exist "dist" (
    exit /b 1
 )

+:: Preflight: do the compiled native modules match THIS Node version?
+:: Switching Node majors after setup leaves node_modules built for the old ABI;
+:: without this check the bot dies mid-startup with a NODE_MODULE_VERSION stack.
+:: check-native.mjs prints the bilingual explanation itself; keep the lines in
+:: this block pure ASCII (cmd.exe garbles multi-byte text inside blocks).
+node scripts\check-native.mjs
+if errorlevel 1 (
+    echo.
+    echo Please run scripts\setup.bat to rebuild the native modules.
+    pause
+    exit /b 1
+)
+
 :: Ensure PowerShell is in PATH (fix for jdymusic CDN playback on some systems)
 where powershell >nul 2>&1
 if errorlevel 1 (
@@ -38,7 +51,10 @@ if errorlevel 1 (
 )

 :: Start the application
+echo WebUI: http://localhost:3000
+echo Press Ctrl+C to stop.
+echo.
 node dist/index.js

 pause
-
+
@@ -55,13 +55,13 @@ describe("buildFfmpegArgs", () => {
    expect(idx).toBeLessThan(args.indexOf("-i")); // input options must precede -i
  });

-  it("inserts -ss before -i when seekSeconds > 0", () => {
+  it("inserts -ss after -i when seekSeconds > 0", () => {
    const args = buildFfmpegArgs("https://example.com/song.mp3", 42);
    const ssIdx = args.indexOf("-ss");
    const iIdx = args.indexOf("-i");
    expect(ssIdx).toBeGreaterThan(-1);
    expect(args[ssIdx + 1]).toBe("42");
-    expect(ssIdx).toBeLessThan(iIdx);
+    expect(ssIdx).toBeGreaterThan(iIdx);
  });

  it("does not insert -ss when seekSeconds is 0", () => {
@@ -216,6 +216,78 @@ const silentLogger = {
  },
 } as unknown as Logger;

+function applyPlayerVolume(player: AudioPlayer, pcm: Buffer): Buffer {
+  return (
+    player as unknown as { applyVolume(input: Buffer): Buffer }
+  ).applyVolume(pcm);
+}
+
+function stereoPcm(sample: number, frames = 2): Buffer {
+  const pcm = Buffer.alloc(frames * 4);
+  for (let offset = 0; offset < pcm.length; offset += 2) {
+    pcm.writeInt16LE(sample, offset);
+  }
+  return pcm;
+}
+
+describe("AudioPlayer transient ducking gain", () => {
+  it("layers ducking on the PCM path without changing the user's base volume", () => {
+    const player = new AudioPlayer(silentLogger);
+    player.setVolume(100);
+    player.setDuckingGain(0.3);
+
+    const adjusted = applyPlayerVolume(player, stereoPcm(10_000));
+
+    expect(adjusted.readInt16LE(0)).toBe(3_000);
+    expect(adjusted.readInt16LE(2)).toBe(3_000);
+    expect(player.getVolume()).toBe(100);
+    expect(player.getDuckingGain()).toBe(0.3);
+  });
+
+  it("multiplies the transient gain by the existing base-volume curve", () => {
+    const player = new AudioPlayer(silentLogger);
+    player.setVolume(50);
+    player.setDuckingGain(0.5);
+
+    const adjusted = applyPlayerVolume(player, stereoPcm(10_000));
+    expect(adjusted.readInt16LE(0)).toBe(
+      Math.round(10_000 * volumeToFactor(50) * 0.5),
+    );
+  });
+
+  it("interpolates ramps smoothly across each stereo PCM frame", () => {
+    let now = 100;
+    const nowSpy = vi.spyOn(performance, "now").mockImplementation(() => now);
+    try {
+      const player = new AudioPlayer(silentLogger);
+      player.setVolume(100);
+      player.setDuckingGain(0.2, 100);
+
+      now = 150;
+      expect(player.getDuckingGain()).toBeCloseTo(0.6, 8);
+      const adjusted = applyPlayerVolume(player, stereoPcm(10_000));
+
+      // At t=150 the ramp is 0.6; at the end of this 20 ms frame it is 0.44.
+      expect(adjusted.readInt16LE(0)).toBe(6_000);
+      expect(adjusted.readInt16LE(2)).toBe(6_000);
+      expect(adjusted.readInt16LE(4)).toBe(4_400);
+      expect(adjusted.readInt16LE(6)).toBe(4_400);
+    } finally {
+      nowSpy.mockRestore();
+    }
+  });
+
+  it("clamps transient gain and ignores a non-finite update", () => {
+    const player = new AudioPlayer(silentLogger);
+    player.setDuckingGain(-1);
+    expect(player.getDuckingGain()).toBe(0);
+    player.setDuckingGain(2);
+    expect(player.getDuckingGain()).toBe(1);
+    player.setDuckingGain(Number.NaN);
+    expect(player.getDuckingGain()).toBe(1);
+  });
+});
+
 // A readable we fully control: no underlying source; we push PCM manually and
 // keep it open (never push(null)) to model the long-lived go-librespot sidecar.
 function openPcmReadable(): Readable {
@@ -103,8 +103,10 @@ export function buildFfmpegArgs(url: string, seekSeconds: number): string[] {
      "-reconnect_on_http_error", "4xx,5xx",
    );
  }
+  args.push("-i", url);
+  // Output-side seek (after -i): works on CDNs that reject Range/keyframe seeks (NetEase music.126.net).
  if (seekSeconds > 0) args.push("-ss", String(seekSeconds));
-  args.push("-i", url, "-f", "s16le", "-ar", "48000", "-ac", "2", "-acodec", "pcm_s16le", "-");
+  args.push("-f", "s16le", "-ar", "48000", "-ac", "2", "-acodec", "pcm_s16le", "-");

  return args;
 }
@@ -161,6 +163,15 @@ export class AudioPlayer extends EventEmitter {
  private encoder: Encoder;
  private state: PlayerState = "idle";
  private volume = 75;
+  /**
+   * A transient gain envelope layered on top of the persisted user volume.
+   * Voice ducking drives this value; keeping it separate means a temporary
+   * attenuation can never leak into the saved volume setting.
+   */
+  private duckingRampStartGain = 1;
+  private duckingTargetGain = 1;
+  private duckingRampStartedAt = 0;
+  private duckingRampDurationMs = 0;
  private pcmBuffer: Buffer = Buffer.alloc(0);
  private logger: Logger;
  private frameLoopRunning = false;
@@ -732,17 +743,54 @@ export class AudioPlayer extends EventEmitter {
  }

  private applyVolume(pcm: Buffer): Buffer {
-    const factor = volumeToFactor(this.volume);
-    // factor === 1 only at volume 100; skip the per-sample loop at full loudness.
-    if (factor >= 1) return Buffer.from(pcm);
+    const baseFactor = volumeToFactor(this.volume);
+    const now = performance.now();
+    const startDuckingGain = this.duckingGainAt(now);
+    const endDuckingGain = this.duckingGainAt(now + FRAME_DURATION_MS);
+    const startFactor = baseFactor * startDuckingGain;
+    const endFactor = baseFactor * endDuckingGain;
+
+    if (startFactor >= 1 && endFactor >= 1) {
+      return Buffer.from(pcm);
+    }
+
    const out = Buffer.alloc(pcm.length);
+    // Most frames are outside the short attack/release windows. Preserve the
+    // old constant-factor hot path instead of doing interpolation per sample.
+    if (startFactor === endFactor) {
+      for (let i = 0; i < pcm.length; i += 2) {
+        const sample = Math.round(pcm.readInt16LE(i) * startFactor);
+        out.writeInt16LE(Math.max(-32768, Math.min(32767, sample)), i);
+      }
+      return out;
+    }
+
+    // PCM is fixed at stereo s16le. Use one gain for each L/R pair so a ramp
+    // never creates a tiny channel imbalance, and span the whole 20 ms frame.
+    const stereoFrames = Math.max(1, Math.ceil(pcm.length / 4));
    for (let i = 0; i < pcm.length; i += 2) {
-      let sample = Math.round(pcm.readInt16LE(i) * factor);
+      const frameIndex = Math.floor(i / 4);
+      const progress = stereoFrames === 1 ? 0 : frameIndex / (stereoFrames - 1);
+      const factor = startFactor + (endFactor - startFactor) * progress;
+      const sample = Math.round(pcm.readInt16LE(i) * factor);
      out.writeInt16LE(Math.max(-32768, Math.min(32767, sample)), i);
    }
    return out;
  }

+  private duckingGainAt(at: number): number {
+    if (this.duckingRampDurationMs <= 0) return this.duckingTargetGain;
+
+    const progress = Math.max(
+      0,
+      Math.min(1, (at - this.duckingRampStartedAt) / this.duckingRampDurationMs),
+    );
+    return (
+      this.duckingRampStartGain +
+      (this.duckingTargetGain - this.duckingRampStartGain) * progress
+    );
+  }
+
  // NOTE: in external (Spotify sidecar) mode getElapsed() is frame-count based
  // (framesPlayed includes silence frames emitted on underrun) and therefore
  // only APPROXIMATE — the authoritative position is the controller's live
@@ -762,9 +810,25 @@ export class AudioPlayer extends EventEmitter {
  resetFailures(): void { this.consecutiveFailures = 0; }
  setVolume(vol: number): void { this.volume = Math.max(0, Math.min(100, vol)); }
  getVolume(): number { return this.volume; }
+  /** Set the temporary voice-ducking gain (0=silent, 1=unchanged). */
+  setDuckingGain(gain: number, rampMs = 0): void {
+    if (!Number.isFinite(gain)) return;
+
+    const now = performance.now();
+    const currentGain = this.duckingGainAt(now);
+    const targetGain = Math.max(0, Math.min(1, gain));
+    const duration = Number.isFinite(rampMs) ? Math.max(0, rampMs) : 0;
+
+    this.duckingRampStartGain = currentGain;
+    this.duckingTargetGain = targetGain;
+    this.duckingRampStartedAt = now;
+    this.duckingRampDurationMs =
+      duration > 0 && currentGain !== targetGain ? duration : 0;
+  }
+  getDuckingGain(): number { return this.duckingGainAt(performance.now()); }
  getState(): PlayerState { return this.state; }
  // True only while attached to an external (Spotify sidecar) PCM stream. Used
  // by the orchestrator to decide whether to re-attach: stop() detaches (sets
  // externalMode=false) so this is false after any player.stop().
  isExternalActive(): boolean { return this.externalMode; }
-}
+}
@@ -564,4 +564,182 @@ describe("PlayQueue", () => {
      }
    });
  });
+
+  describe("snapshot / restore (#119)", () => {
+    it("round-trips songs, index, and mode; strips url", () => {
+      const q = new PlayQueue();
+      q.add(makeSong("A"));
+      q.add(makeSong("B"));
+      q.setMode(PlayMode.Loop);
+      q.play();
+      q.next(); // current = index 1
+      const snap = q.snapshot();
+      expect(snap.currentIndex).toBe(1);
+      expect(snap.mode).toBe(PlayMode.Loop);
+      expect((snap.songs[0] as QueuedSong).url).toBeUndefined();
+      expect(snap.songs.map((s) => s.id)).toEqual(["A", "B"]);
+
+      const q2 = new PlayQueue();
+      q2.restore(snap);
+      expect(q2.list().map((s) => s.id)).toEqual(["A", "B"]);
+      expect(q2.getCurrentIndex()).toBe(1);
+      expect(q2.getMode()).toBe(PlayMode.Loop);
+      expect(q2.current()?.id).toBe("B");
+    });
+
+    it("preserves requestedBy through a snapshot", () => {
+      const q = new PlayQueue();
+      q.add({ ...makeSong("A"), requestedBy: "alice" });
+      q.play();
+      const q2 = new PlayQueue();
+      q2.restore(q.snapshot());
+      expect(q2.current()?.requestedBy).toBe("alice");
+    });
+
+    it("degrades an out-of-range index to -1 (nothing current)", () => {
+      const q = new PlayQueue();
+      const { url: _url, ...noUrl } = makeSong("A");
+      q.restore({ songs: [noUrl], currentIndex: 5, mode: PlayMode.Sequential });
+      expect(q.getCurrentIndex()).toBe(-1);
+      expect(q.current()).toBeNull();
+      expect(q.list().map((s) => s.id)).toEqual(["A"]);
+    });
+  });
+
+  // Issue #141: in Random/RandomLoop, next() picks from the shuffle bag and
+  // ignores array order, so a song spliced in by addNext (!pn) was NOT played
+  // next — it just waited for its random turn like any other song. addNext now
+  // records the insert slot on the forward stack, which next() honours first.
+  describe("addNext in random modes (issue #141)", () => {
+    for (const mode of [PlayMode.Random, PlayMode.RandomLoop]) {
+      it(`plays the inserted song next in ${mode} mode`, () => {
+        queue.setMode(mode);
+        for (const id of ["a", "b", "c", "d"]) queue.add(makeSong(id));
+        queue.play(); // current = 0 (a)
+        queue.addNext(makeSong("x"));
+        expect(queue.next()?.id).toBe("x");
+      });
+    }
+
+    it("plays consecutive inserts in the order the queue displays them", () => {
+      queue.setMode(PlayMode.RandomLoop);
+      for (const id of ["a", "b", "c", "d"]) queue.add(makeSong(id));
+      queue.play(); // current = 0 (a)
+      queue.addNext(makeSong("x"));
+      queue.addNext(makeSong("y")); // splices in front of x, as in sequential
+      expect(queue.list().map((s) => s.id)).toEqual(["a", "y", "x", "b", "c", "d"]);
+      expect(queue.next()?.id).toBe("y");
+      expect(queue.next()?.id).toBe("x");
+    });
+
+    it("honours the insert even after the shuffle bag is exhausted", () => {
+      // Random (non-loop) returns null once every song has played. Songs added
+      // afterwards must still be reachable via !pn — and with TWO of them the
+      // order can only come from the forward stack, not from the bag having a
+      // single remaining candidate.
+      queue.setMode(PlayMode.Random);
+      for (const id of ["a", "b", "c", "d"]) queue.add(makeSong(id));
+      queue.play();
+      for (let i = 0; i < 3; i++) queue.next();
+      expect(queue.next()).toBeNull(); // bag exhausted
+      queue.addNext(makeSong("x"));
+      queue.addNext(makeSong("y"));
+      queue.addNext(makeSong("z"));
+      expect(queue.next()?.id).toBe("z");
+      expect(queue.next()?.id).toBe("y");
+      expect(queue.next()?.id).toBe("x");
+    });
+
+    it("pops past a prev() marker to reach the pending insert", () => {
+      // prev() shares the forward stack, and in random mode with no history it
+      // pushes the current index and then returns null. next() must walk past
+      // those self-referencing markers instead of consuming one and giving up
+      // to the shuffle bag.
+      queue.setMode(PlayMode.Random);
+      for (const id of ["a", "b", "c", "d"]) queue.add(makeSong(id));
+      queue.play(); // a
+      queue.addNext(makeSong("x"));
+      expect(queue.prev()).toBeNull();
+      expect(queue.prev()).toBeNull();
+      expect(queue.next()?.id).toBe("x");
+    });
+
+    it("plays each song exactly once — the insert is not replayed later", () => {
+      queue.setMode(PlayMode.Random);
+      for (const id of ["a", "b", "c", "d"]) queue.add(makeSong(id));
+      queue.play(); // a
+      queue.addNext(makeSong("x"));
+      queue.addNext(makeSong("y"));
+
+      const played = [queue.current()!.id];
+      for (let i = 0; i < 5; i++) played.push(queue.next()!.id);
+      expect(queue.next()).toBeNull(); // bag exhausted
+      expect(played.slice(0, 3)).toEqual(["a", "y", "x"]);
+      expect(new Set(played).size).toBe(6);
+    });
+
+    it("keeps the insert reachable after an earlier song is removed", () => {
+      queue.setMode(PlayMode.RandomLoop);
+      for (const id of ["a", "b", "c", "d"]) queue.add(makeSong(id));
+      queue.playAt(2); // current = 2 (c)
+      queue.addNext(makeSong("x")); // [a, b, c, x, d]
+      queue.remove(0); // [b, c, x, d] — x slides from 3 to 2
+      expect(queue.next()?.id).toBe("x");
+    });
+
+    it("drops the entry when the inserted song is itself removed", () => {
+      // Leaving the stale entry behind would not throw — index 2 still exists
+      // after the removal, it just points at a different song. So the queue is
+      // arranged with exactly one song the shuffle bag can legally return:
+      // anything else means the dead forward entry was honoured.
+      queue.setMode(PlayMode.RandomLoop);
+      for (const id of ["a", "b", "c"]) queue.add(makeSong(id));
+      queue.playAt(0); // current = 0 (a), played = {0}
+      queue.next(); // b or c — two of the three are now played
+      const remaining = queue.list().find((s) => s.id !== "a" && s.id !== queue.current()!.id)!;
+      queue.addNext(makeSong("x")); // spliced at currentIndex+1
+      queue.remove(queue.getCurrentIndex() + 1); // …and removed again
+      expect(queue.list().map((s) => s.id)).not.toContain("x");
+      expect(queue.next()?.id).toBe(remaining.id);
+    });
+
+    it("never yields a stale index under interleaved inserts and removals", () => {
+      // The forward stack holds array indices, so every splice has to shift
+      // them. next() returning `undefined` here (an out-of-range index) reads
+      // as end-of-queue to BotInstance.playNext and silently stops playback.
+      queue.setMode(PlayMode.RandomLoop);
+      for (let i = 0; i < 6; i++) queue.add(makeSong(`s${i}`));
+      queue.play();
+      for (let step = 0; step < 200; step++) {
+        const roll = step % 4;
+        if (roll === 0) queue.addNext(makeSong(`x${step}`));
+        else if (roll === 1 && queue.size() > 1) queue.remove(step % queue.size());
+        else {
+          const song = queue.next();
+          expect(song === null || song === queue.current()).toBe(true);
+          if (song !== null) expect(song).toBeDefined();
+        }
+      }
+    });
+
+    it("leaves sequential/loop behaviour untouched", () => {
+      queue.setMode(PlayMode.Sequential);
+      for (const id of ["a", "b", "c"]) queue.add(makeSong(id));
+      queue.play(); // a
+      queue.addNext(makeSong("x"));
+      expect(queue.next()?.id).toBe("x");
+      expect(queue.next()?.id).toBe("b");
+      expect(queue.next()?.id).toBe("c");
+      expect(queue.next()).toBeNull();
+    });
+
+    it("still appends (no forward entry) when nothing is playing", () => {
+      queue.setMode(PlayMode.Random);
+      queue.add(makeSong("a"));
+      queue.addNext(makeSong("x")); // currentIndex is still -1 → plain push
+      expect(queue.list().map((s) => s.id)).toEqual(["a", "x"]);
+      queue.play(); // a — a stray forward entry would have hijacked this
+      expect(queue.current()?.id).toBe("a");
+    });
+  });
 });
@@ -17,6 +17,18 @@ export interface QueuedSong {
  requestedBy?: string;
 }

+/**
+ * A persistable view of a queue: its songs (minus the lazily-resolved `url`),
+ * the current index, and the play mode. Used to snapshot/restore the live queue
+ * across restarts (issue #119). Derived state (playedIndices/history/forward
+ * stack) is intentionally NOT captured — restore() rebuilds it consistently.
+ */
+export interface QueueSnapshot {
+  songs: Omit<QueuedSong, "url">[];
+  currentIndex: number;
+  mode: PlayMode;
+}
+
 export class PlayQueue {
  private songs: QueuedSong[] = [];
  private currentIndex = -1;
@@ -48,8 +60,12 @@ export class PlayQueue {
   * or queue empty), so the existing "add → idle bot starts playing"
   * flow continues to work.
   *
-   * Shifts playedIndices and history entries > currentIndex by +1 so
-   * their references stay valid after the splice.
+   * Shifts playedIndices, history and forwardStack entries > currentIndex
+   * by +1 so their references stay valid after the splice.
+   *
+   * In the random modes the array position alone means nothing — next()
+   * picks from the shuffle bag — so the insert slot is also recorded on
+   * the forward stack, which next() consults first (issue #141).
   */
  addNext(song: QueuedSong): void {
    if (this.currentIndex < 0 || this.songs.length === 0) {
@@ -68,6 +84,23 @@ export class PlayQueue {
    this.history = this.history.map((i) =>
      i > this.currentIndex ? i + 1 : i,
    );
+
+    this.forwardStack = this.forwardStack.map((i) =>
+      i > this.currentIndex ? i + 1 : i,
+    );
+
+    // Push AFTER the shift, or the slot we just claimed would be shifted
+    // too. Stacking makes repeated !pn play in the order the queue shows
+    // them (each insert lands in front of the previous one), matching what
+    // sequential mode does with the same array. Bounded like history: drop the
+    // OLDEST pending entry rather than refusing the newest, so the song the
+    // user just asked for is always the one that gets honoured.
+    if (this.mode === PlayMode.Random || this.mode === PlayMode.RandomLoop) {
+      this.forwardStack.push(insertAt);
+      if (this.forwardStack.length > PlayQueue.HISTORY_LIMIT) {
+        this.forwardStack.shift();
+      }
+    }
  }

  remove(index: number): QueuedSong | null {
@@ -94,6 +127,13 @@ export class PlayQueue {
      .filter((idx) => idx !== index)
      .map((idx) => (idx > index ? idx - 1 : idx));

+    // …and for the forward stack, which now also carries !pn insert slots
+    // (issue #141). Left unshifted, a removal elsewhere in the queue would
+    // silently repoint the entry at whatever song slid into that slot.
+    this.forwardStack = this.forwardStack
+      .filter((idx) => idx !== index)
+      .map((idx) => (idx > index ? idx - 1 : idx));
+
    return removed;
  }

@@ -146,15 +186,22 @@ export class PlayQueue {
      }
      case PlayMode.Random:
      case PlayMode.RandomLoop: {
-        // 优先回到前进栈记录的位置（prev 退回的歌）
-        if (this.forwardStack.length > 0) {
+        // 优先回到前进栈记录的位置（prev 退回的歌，或 !pn 插入的歌）。
+        // Keep popping past entries that no longer point anywhere useful,
+        // the way prev() walks past stale history entries. Without the loop a
+        // prev() that pushed the current index would swallow the pending !pn
+        // entry behind it. The range check is belt-and-braces — addNext and
+        // remove keep the stack in sync — but an out-of-range index here would
+        // set currentIndex out of bounds and hand back `undefined`, which
+        // BotInstance.playNext reads as end-of-queue and stops playback.
+        while (this.forwardStack.length > 0) {
          const target = this.forwardStack.pop()!;
-          if (target !== this.currentIndex) {
-            this.pushHistory(this.currentIndex);
-            this.currentIndex = target;
-            this.playedIndices.add(target);
-            return this.songs[target];
-          }
+          if (target < 0 || target >= this.songs.length) continue;
+          if (target === this.currentIndex) continue;
+          this.pushHistory(this.currentIndex);
+          this.currentIndex = target;
+          this.playedIndices.add(target);
+          return this.songs[target];
        }

        // Shuffle bag: pick uniformly from the songs not yet played this
@@ -273,4 +320,32 @@ export class PlayQueue {
  unplayedCount(): number {
    return this.songs.length - this.playedIndices.size;
  }
+
+  /**
+   * Capture the queue as a persistable snapshot (songs minus `url`, current
+   * index, mode). Songs keep their `requestedBy` so restored play-history
+   * attribution stays correct. See restore().
+   */
+  snapshot(): QueueSnapshot {
+    return {
+      songs: this.songs.map(({ url: _url, ...s }) => s),
+      currentIndex: this.currentIndex,
+      mode: this.mode,
+    };
+  }
+
+  /**
+   * Replace the queue contents from a snapshot. Rebuilds the derived
+   * playedIndices/history/forwardStack to a clean, consistent state for the
+   * restored index (an out-of-range index degrades to -1 = "nothing current").
+   */
+  restore(s: QueueSnapshot): void {
+    this.songs = s.songs.map((song) => ({ ...song }));
+    this.mode = s.mode;
+    this.currentIndex =
+      s.currentIndex >= 0 && s.currentIndex < this.songs.length ? s.currentIndex : -1;
+    this.playedIndices = new Set(this.currentIndex >= 0 ? [this.currentIndex] : []);
+    this.history = [];
+    this.forwardStack = [];
+  }
 }
@@ -1,6 +1,10 @@
 import { describe, it, expect, vi } from "vitest";
+import { EventEmitter } from "node:events";
 import { BotInstance, COMMAND_DENIED_MESSAGE, spotifyPortsForBotId } from "./instance.js";
 import type { BotInstanceOptions } from "./instance.js";
+import { PlayQueue, PlayMode } from "../audio/queue.js";
+import { createDatabase, SHARED_QUEUE_OWNER } from "../data/database.js";
+import { parseCommand } from "./commands.js";
 import type { TS3TextMessage } from "../ts-protocol/client.js";
 import type { SpotifyController } from "../music/spotify/controller.js";
 import type { SpotifyOAuth } from "../music/spotify/spotify-oauth.js";
@@ -8,6 +12,7 @@ import type { MusicProvider } from "../music/provider.js";
 import type { BotDatabase } from "../data/database.js";
 import type { AvatarStore } from "../data/avatars.js";
 import type { BotConfig } from "../data/config.js";
+import { ManagedVoiceClientRegistry } from "./managed-voice-clients.js";

 // Constructing a real BotInstance is heavy (spawns a TS3Client, AudioPlayer,
 // reads avatars, etc.), and runExclusive only touches a single private field
@@ -119,6 +124,155 @@ describe("BotInstance.runExclusive — serialization", () => {
  });
 });

+describe("BotInstance voice-ducking lifecycle integration", () => {
+  const connect = BotInstance.prototype.connect as unknown as (
+    this: Record<string, any>,
+  ) => Promise<void>;
+
+  function makeConnectContext(connectPromise: Promise<void>) {
+    return {
+      disconnectEmitted: false,
+      connected: false,
+      tsClient: {
+        connect: vi.fn(() => connectPromise),
+        getResolvedVoiceEndpoint: vi.fn(() => ({ host: "203.0.113.20", port: 12000 })),
+      },
+      configuredVoiceServerScope: {
+        host: "voice-alias.example.com",
+        voicePort: 9987,
+      },
+      voiceServerScope: { host: "voice-alias.example.com", voicePort: 9987 },
+      voiceDucking: { reset: vi.fn() },
+      registerManagedVoiceClient: vi.fn(),
+      profileManager: { onConnect: vi.fn() },
+      emit: vi.fn(),
+      restoreQueueFromSnapshot: vi.fn(async () => {}),
+    };
+  }
+
+  it("registers its managed client only after a successful outer connect", async () => {
+    const ctx = makeConnectContext(Promise.resolve());
+
+    await connect.call(ctx);
+
+    expect(ctx.connected).toBe(true);
+    expect(ctx.voiceServerScope).toEqual({ host: "203.0.113.20", voicePort: 12000 });
+    expect(ctx.voiceDucking.reset).toHaveBeenCalledWith(true);
+    expect(ctx.registerManagedVoiceClient).toHaveBeenCalledOnce();
+    expect(ctx.profileManager.onConnect).toHaveBeenCalledOnce();
+  });
+
+  it("does not register a late handshake after disconnect aborted it", async () => {
+    const handshake = deferred();
+    const ctx = makeConnectContext(handshake.promise);
+
+    const result = connect.call(ctx);
+    ctx.disconnectEmitted = true;
+    handshake.resolve();
+
+    await expect(result).rejects.toThrow("Connect aborted by concurrent disconnect");
+    expect(ctx.connected).toBe(false);
+    expect(ctx.registerManagedVoiceClient).not.toHaveBeenCalled();
+    expect(ctx.voiceDucking.reset).not.toHaveBeenCalled();
+  });
+
+  it("falls back to the configured endpoint when identity discovery is unavailable", async () => {
+    const ctx = makeConnectContext(Promise.resolve());
+    ctx.tsClient.getResolvedVoiceEndpoint.mockReturnValue(null as any);
+
+    await connect.call(ctx);
+
+    expect(ctx.voiceServerScope).toEqual({
+      host: "voice-alias.example.com",
+      voicePort: 9987,
+    });
+  });
+
+  it("routes human voice activity but filters another managed bot", () => {
+    const tsClient = new EventEmitter() as EventEmitter & {
+      getClientId(): number;
+    };
+    tsClient.getClientId = () => 10;
+    const managedVoiceClients = new ManagedVoiceClientRegistry();
+    const voiceServerScope = { host: "voice.example.com", voicePort: 9987 };
+    managedVoiceClients.register(
+      { host: "192.168.1.10", voicePort: 20_000 },
+      20,
+      {},
+      "managed-bot-uid=",
+    );
+    managedVoiceClients.register(voiceServerScope, 22, {}, "fallback-bot-uid=");
+    const handleVoiceActivity = vi.fn();
+    const ctx = {
+      tsClient,
+      connected: true,
+      managedVoiceClients,
+      voiceServerScope,
+      voiceDucking: {
+        handleVoiceActivity,
+        removeSpeaker: vi.fn(),
+        reset: vi.fn(),
+      },
+    } as Record<string, any>;
+
+    (BotInstance.prototype as any).setupTsEvents.call(ctx);
+    tsClient.emit("voiceActivity", {
+      clientId: 20,
+      codec: 5,
+      clientUid: "managed-bot-uid=",
+    });
+    // If a UID is momentarily unavailable, the scoped client-id registry is
+    // retained as a fallback for the common same-endpoint case.
+    tsClient.emit("voiceActivity", { clientId: 22, codec: 5 });
+    tsClient.emit("voiceActivity", {
+      clientId: 21,
+      codec: 5,
+      clientUid: "human-uid=",
+    });
+
+    expect(handleVoiceActivity).toHaveBeenCalledOnce();
+    expect(handleVoiceActivity).toHaveBeenCalledWith(21);
+  });
+
+  it("keeps a disconnecting bot registered during the in-flight packet grace", () => {
+    vi.useFakeTimers();
+    try {
+      const managedVoiceClients = new ManagedVoiceClientRegistry();
+      const voiceServerScope = { host: "voice.example.com", voicePort: 9987 };
+      const owner = {};
+      managedVoiceClients.register(
+        voiceServerScope,
+        20,
+        owner,
+        "managed-bot-uid=",
+      );
+      const ctx = {
+        managedVoiceClients,
+        voiceServerScope,
+        registeredVoiceClientId: 20,
+        registeredVoiceClientOwner: owner,
+        registeredVoiceClientScope: voiceServerScope,
+        registeredVoiceClientUid: "managed-bot-uid=",
+      };
+
+      (BotInstance.prototype as any).unregisterManagedVoiceClient.call(ctx, 1_000);
+      // A reconnect may resolve to a new endpoint before the grace expires;
+      // cleanup must still target the scope that owned the old client id.
+      ctx.voiceServerScope = { host: "other.example.com", voicePort: 9987 };
+      expect(managedVoiceClients.has(voiceServerScope, 20)).toBe(true);
+      expect(managedVoiceClients.hasClientUid("managed-bot-uid=")).toBe(true);
+
+      vi.advanceTimersByTime(999);
+      expect(managedVoiceClients.has(voiceServerScope, 20)).toBe(true);
+      vi.advanceTimersByTime(1);
+      expect(managedVoiceClients.has(voiceServerScope, 20)).toBe(false);
+      expect(managedVoiceClients.hasClientUid("managed-bot-uid=")).toBe(false);
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+});
+
 /** Minimal `this` carrying only what handleTextMessage's gate path touches.
 *  The gate methods live on the prototype and are attached here so calls like
 *  `this.isCommandAllowed(...)` resolve against this same object. */
@@ -832,6 +986,9 @@ describe("BotInstance — spotifyOAuth threading to the controller factory (C3.1
    const database = {
      getProfileConfig: () => ({}),
      getCustomAvatarPath: () => null,
+      getPlayerSettings: () => ({ volume: 75, playMode: "seq" }),
+      saveVolume: () => {},
+      savePlayMode: () => {},
    } as unknown as BotDatabase;
    const options: BotInstanceOptions = {
      id: "bot-oauth-test",
@@ -912,6 +1069,136 @@ describe("spotifyPortsForBotId — per-bot go-librespot ports (Fix 3)", () => {
  });
 });

+// --- Persisting volume + play mode across restarts (#125) ------------------
+const cmdVol = (BotInstance.prototype as any).cmdVol as (this: unknown, cmd: any) => string;
+const cmdMode = (BotInstance.prototype as any).cmdMode as (this: unknown, cmd: any) => string;
+
+describe("BotInstance.cmdVol — persistence (#125)", () => {
+  function makeVolCtx() {
+    let stored = 75;
+    return {
+      id: "bot1",
+      player: {
+        setVolume: vi.fn((v: number) => { stored = v; }),
+        getVolume: vi.fn(() => stored),
+      },
+      database: { saveVolume: vi.fn() },
+      logger: { warn: vi.fn() },
+      emit: vi.fn(),
+      // The real private persist helper lives on the prototype; wire it so the
+      // test exercises the shipped persistence path end-to-end.
+      persistVolume: (BotInstance.prototype as any).persistVolume,
+    } as any;
+  }
+
+  it("saves the new volume via database.saveVolume (covers chat !vol AND the REST endpoint)", () => {
+    const ctx = makeVolCtx();
+    const res = cmdVol.call(ctx, { args: "40" });
+    expect(res).toBe("Volume set to 40%");
+    expect(ctx.player.setVolume).toHaveBeenCalledWith(40);
+    expect(ctx.database.saveVolume).toHaveBeenCalledWith("bot1", 40);
+    expect(ctx.emit).toHaveBeenCalledWith("stateChange");
+  });
+
+  it("does not persist an out-of-range volume", () => {
+    const ctx = makeVolCtx();
+    const res = cmdVol.call(ctx, { args: "999" });
+    expect(res).toBe("Usage: !vol <0-100>");
+    expect(ctx.player.setVolume).not.toHaveBeenCalled();
+    expect(ctx.database.saveVolume).not.toHaveBeenCalled();
+  });
+
+  it("swallows a database error so the volume change still succeeds", () => {
+    const ctx = makeVolCtx();
+    ctx.database.saveVolume = vi.fn(() => { throw new Error("disk full"); });
+    const res = cmdVol.call(ctx, { args: "50" });
+    expect(res).toBe("Volume set to 50%");
+    expect(ctx.player.setVolume).toHaveBeenCalledWith(50);
+    expect(ctx.logger.warn).toHaveBeenCalled();
+  });
+});
+
+describe("BotInstance.cmdMode — persistence (#125)", () => {
+  function makeModeCtx() {
+    let mode = "seq";
+    return {
+      id: "bot1",
+      queue: {
+        setMode: vi.fn((m: string) => { mode = m; }),
+        getMode: vi.fn(() => mode),
+      },
+      database: { savePlayMode: vi.fn() },
+      logger: { warn: vi.fn() },
+      emit: vi.fn(),
+      persistPlayMode: (BotInstance.prototype as any).persistPlayMode,
+    } as any;
+  }
+
+  it("saves the new play mode via database.savePlayMode", () => {
+    const ctx = makeModeCtx();
+    const res = cmdMode.call(ctx, { args: "rloop" });
+    expect(res).toBe("Play mode set to: rloop");
+    expect(ctx.queue.setMode).toHaveBeenCalledWith("rloop");
+    expect(ctx.database.savePlayMode).toHaveBeenCalledWith("bot1", "rloop");
+    expect(ctx.emit).toHaveBeenCalledWith("stateChange");
+  });
+
+  it("does not persist an unknown mode", () => {
+    const ctx = makeModeCtx();
+    const res = cmdMode.call(ctx, { args: "bogus" });
+    expect(res).toBe("Usage: !mode <seq|loop|random|rloop>");
+    expect(ctx.queue.setMode).not.toHaveBeenCalled();
+    expect(ctx.database.savePlayMode).not.toHaveBeenCalled();
+  });
+});
+
+describe("BotInstance — restores persisted player settings on construction (#125)", () => {
+  const provider = { platform: "netease" } as unknown as MusicProvider;
+  function makeOptions(id: string, database: BotDatabase): BotInstanceOptions {
+    const logger: any = { info() {}, warn() {}, error() {}, debug() {}, child() { return logger; } };
+    return {
+      id,
+      name: "RestoreBot",
+      tsOptions: { host: "localhost", port: 9987, queryPort: 10011, nickname: "RestoreBot" } as any,
+      neteaseProvider: provider,
+      qqProvider: provider,
+      bilibiliProvider: provider,
+      youtubeProvider: provider,
+      database,
+      config: { spotify: {} } as unknown as BotConfig,
+      logger,
+      avatarStore: { read: () => null } as unknown as AvatarStore,
+      spotifyControllerFactory: () => ({ on: () => {} } as unknown as SpotifyController),
+    };
+  }
+
+  it("applies the saved volume + play mode from the database", () => {
+    const db = createDatabase(":memory:");
+    db.saveBotInstance({
+      id: "bot-restore", name: "B", serverAddress: "x", serverPort: 9987, nickname: "n",
+      defaultChannel: "", channelId: "", channelPassword: "", autoStart: false,
+      serverProtocol: "", ts6ApiKey: "", serverPassword: "",
+    });
+    db.saveVolume("bot-restore", 33);
+    db.savePlayMode("bot-restore", "loop");
+
+    const bot = new BotInstance(makeOptions("bot-restore", db));
+    const status = bot.getStatus();
+    expect(status.volume).toBe(33);
+    expect(status.playMode).toBe("loop");
+    db.close();
+  });
+
+  it("falls back to defaults for a bot with no saved settings", () => {
+    const db = createDatabase(":memory:");
+    const bot = new BotInstance(makeOptions("brand-new", db));
+    const status = bot.getStatus();
+    expect(status.volume).toBe(75);
+    expect(status.playMode).toBe("seq");
+    db.close();
+  });
+});
+
 describe("BotInstance.handleTextMessage — response chunking (#116)", () => {
  it("splits a long command response into multiple sends, each under the byte cap", async () => {
    const ctx = makeGateCtx({ adminGroups: [] });
@@ -972,3 +1259,401 @@ describe("BotInstance.cmdLyrics — full lyrics (#116)", () => {
    expect(await cmdLyrics.call(ctx)).toBe("No lyrics available");
  });
 });
+
+// ─── Saved queues + live-queue persistence + playKeepsQueue (#119) ─────────
+// All exercise the ACTUAL shipped methods via their prototype, bound to a
+// minimal ctx — the same lightweight pattern as the cmd* tests above.
+const playSingleSong = BotInstance.prototype.playSingleSong as (
+  this: unknown,
+  song: unknown,
+  requesterName?: string,
+) => Promise<boolean>;
+const loadSavedQueue = BotInstance.prototype.loadSavedQueue as (
+  this: unknown,
+  songs: unknown[],
+  mode: "replace" | "append",
+  requesterName?: string,
+) => Promise<void>;
+const cmdSaveQueue = (BotInstance.prototype as any).cmdSaveQueue as (this: unknown, cmd: any) => string;
+const cmdLoadQueue = (BotInstance.prototype as any).cmdLoadQueue as (this: unknown, cmd: any) => Promise<string>;
+const cmdListQueues = (BotInstance.prototype as any).cmdListQueues as (this: unknown) => string;
+const persistQueueSnapshot = (BotInstance.prototype as any).persistQueueSnapshot as (this: unknown) => void;
+const scheduleQueueSnapshot = (BotInstance.prototype as any).scheduleQueueSnapshot as (this: unknown) => void;
+const restoreQueueFromSnapshot = (BotInstance.prototype as any).restoreQueueFromSnapshot as (this: unknown) => Promise<void>;
+
+const withRequester = (BotInstance.prototype as any).withRequester;
+const isSameSong = (BotInstance.prototype as any).isSameSong;
+const savedQueuesGuard = (BotInstance.prototype as any).savedQueuesGuard;
+
+function song119(id: string) {
+  return { id, name: id, artist: "", album: "", platform: "netease" as const, coverUrl: "", duration: 1 };
+}
+function makePlayer119() {
+  let state: "idle" | "playing" | "paused" = "idle";
+  return {
+    stop: vi.fn(() => { state = "idle"; }),
+    resetFailures: vi.fn(),
+    getState: vi.fn(() => state),
+    _play: () => { state = "playing"; },
+  };
+}
+
+describe("BotInstance.playSingleSong / playKeepsQueue (#119)", () => {
+  function makeCtx(playKeepsQueue: boolean) {
+    const queue = new PlayQueue();
+    return {
+      config: { playKeepsQueue },
+      queue,
+      player: makePlayer119(),
+      withRequester,
+      isSameSong,
+      disableFmMode: vi.fn(),
+      sweepLocalAudio: vi.fn(),
+      resolveAndPlay: vi.fn(async () => true),
+    } as any;
+  }
+
+  it("clears the queue when playKeepsQueue is false (default)", async () => {
+    const ctx = makeCtx(false);
+    ctx.queue.add(song119("a"));
+    ctx.queue.play();
+    const ok = await playSingleSong.call(ctx, song119("b"), "alice");
+    expect(ok).toBe(true);
+    expect(ctx.queue.list().map((s: any) => s.id)).toEqual(["b"]);
+    expect(ctx.queue.current()?.id).toBe("b");
+    expect(ctx.sweepLocalAudio).toHaveBeenCalled();
+  });
+
+  it("inserts-after-current and keeps the queue when playKeepsQueue is true", async () => {
+    const ctx = makeCtx(true);
+    ctx.queue.add(song119("a"));
+    ctx.queue.add(song119("c"));
+    ctx.queue.play(); // current = a (index 0)
+    await playSingleSong.call(ctx, song119("b"), "alice");
+    expect(ctx.queue.list().map((s: any) => s.id)).toEqual(["a", "b", "c"]);
+    expect(ctx.queue.current()?.id).toBe("b");
+    expect(ctx.queue.current()?.requestedBy).toBe("alice");
+    // Keep-queue mode must not sweep local uploads (nothing was released).
+    expect(ctx.sweepLocalAudio).not.toHaveBeenCalled();
+  });
+
+  it("falls back to clear-and-play when playKeepsQueue is true but the queue is empty", async () => {
+    const ctx = makeCtx(true);
+    await playSingleSong.call(ctx, song119("b"), "alice");
+    expect(ctx.queue.list().map((s: any) => s.id)).toEqual(["b"]);
+    expect(ctx.queue.current()?.id).toBe("b");
+  });
+});
+
+describe("BotInstance.loadSavedQueue (#119)", () => {
+  function makeCtx() {
+    const player = makePlayer119();
+    return {
+      queue: new PlayQueue(),
+      player,
+      withRequester,
+      disableFmMode: vi.fn(),
+      sweepLocalAudio: vi.fn(),
+      resolveAndPlay: vi.fn(async () => { player._play(); return true; }),
+      emit: vi.fn(),
+    } as any;
+  }
+
+  it("replace clears + plays from the first track", async () => {
+    const ctx = makeCtx();
+    ctx.queue.add(song119("old"));
+    ctx.queue.play();
+    await loadSavedQueue.call(ctx, [song119("a"), song119("b")], "replace", "bob");
+    expect(ctx.queue.list().map((s: any) => s.id)).toEqual(["a", "b"]);
+    expect(ctx.queue.current()?.id).toBe("a");
+    expect(ctx.queue.current()?.requestedBy).toBe("bob");
+    expect(ctx.disableFmMode).toHaveBeenCalled();
+    expect(ctx.resolveAndPlay).toHaveBeenCalled();
+    expect(ctx.emit).toHaveBeenCalledWith("stateChange");
+  });
+
+  it("append adds to the end and starts playing only when idle", async () => {
+    const ctx = makeCtx();
+    // Idle bot with an existing (not playing) queue entry.
+    ctx.queue.add(song119("x"));
+    await loadSavedQueue.call(ctx, [song119("a"), song119("b")], "append");
+    expect(ctx.queue.list().map((s: any) => s.id)).toEqual(["x", "a", "b"]);
+    // wasIdle → start the first appended song (index 1).
+    expect(ctx.queue.current()?.id).toBe("a");
+    expect(ctx.resolveAndPlay).toHaveBeenCalledTimes(1);
+  });
+
+  it("append does not interrupt a playing track", async () => {
+    const ctx = makeCtx();
+    ctx.player._play(); // player is 'playing'
+    ctx.queue.add(song119("x"));
+    ctx.queue.play(); // current = x
+    await loadSavedQueue.call(ctx, [song119("a")], "append");
+    expect(ctx.queue.list().map((s: any) => s.id)).toEqual(["x", "a"]);
+    expect(ctx.queue.current()?.id).toBe("x");
+    expect(ctx.resolveAndPlay).not.toHaveBeenCalled();
+  });
+});
+
+describe("BotInstance chat save/load/queues (#119)", () => {
+  function makeCtx(enabled: boolean, db = createDatabase(":memory:")) {
+    const queue = new PlayQueue();
+    return {
+      config: { savedQueuesEnabled: enabled, commandPrefix: "!" },
+      queue,
+      database: db,
+      savedQueuesGuard,
+      loadSavedQueue: vi.fn(async () => {}),
+    } as any;
+  }
+
+  it("replies 此功能未启用 when the feature is disabled", () => {
+    const ctx = makeCtx(false);
+    expect(cmdSaveQueue.call(ctx, parseCommand("!save night", "!")!)).toBe("此功能未启用");
+    expect(cmdListQueues.call(ctx)).toBe("此功能未启用");
+  });
+
+  it("refuses saving an empty queue", () => {
+    const ctx = makeCtx(true);
+    expect(cmdSaveQueue.call(ctx, parseCommand("!save night", "!")!)).toBe("队列为空，无法保存");
+  });
+
+  it("saves the current queue to the shared bucket and lists it", () => {
+    const ctx = makeCtx(true);
+    ctx.queue.add(song119("a"));
+    ctx.queue.add(song119("b"));
+    const reply = cmdSaveQueue.call(ctx, parseCommand("!save night", "!")!);
+    expect(reply).toContain("已保存队列");
+    expect(ctx.database.listSavedQueues(SHARED_QUEUE_OWNER, false).map((x: any) => x.name)).toContain("night");
+    expect(cmdListQueues.call(ctx)).toContain("night");
+  });
+
+  it("loads a saved queue by name (replace by default, -a appends)", async () => {
+    const db = createDatabase(":memory:");
+    const ctx = makeCtx(true, db);
+    db.saveQueue(SHARED_QUEUE_OWNER, "night", [song119("a")]);
+    const rep = await cmdLoadQueue.call(ctx, parseCommand("!load night", "!")!);
+    expect(rep).toContain("已加载");
+    expect(ctx.loadSavedQueue).toHaveBeenCalledWith(expect.any(Array), "replace");
+
+    const repA = await cmdLoadQueue.call(ctx, parseCommand("!load -a night", "!")!);
+    expect(repA).toContain("已追加");
+    expect(ctx.loadSavedQueue).toHaveBeenLastCalledWith(expect.any(Array), "append");
+  });
+
+  it("reports a missing saved queue", async () => {
+    const ctx = makeCtx(true);
+    expect(await cmdLoadQueue.call(ctx, parseCommand("!load nope", "!")!)).toContain("找不到");
+  });
+});
+
+describe("BotInstance live-queue persistence (#119)", () => {
+  function makeCtx(enabled: boolean, db = createDatabase(":memory:")) {
+    return {
+      id: "bot1",
+      config: { savedQueuesEnabled: enabled },
+      queue: new PlayQueue(),
+      database: db,
+      isFmMode: false,
+      fmProvider: null,
+      logger: { info: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn() },
+      player: makePlayer119(),
+      resolveAndPlay: vi.fn(async () => true),
+      getProviderFor: vi.fn(() => ({ platform: "netease" })),
+    } as any;
+  }
+
+  it("persists a snapshot when enabled", () => {
+    const ctx = makeCtx(true);
+    ctx.queue.add(song119("a"));
+    ctx.queue.play();
+    persistQueueSnapshot.call(ctx);
+    const st = ctx.database.getQueueState("bot1")!;
+    expect(st.songs.map((s: any) => s.id)).toEqual(["a"]);
+    expect(st.currentIndex).toBe(0);
+  });
+
+  it("does NOT persist when the feature is disabled", () => {
+    const ctx = makeCtx(false);
+    ctx.queue.add(song119("a"));
+    ctx.queue.play();
+    persistQueueSnapshot.call(ctx);
+    expect(ctx.database.getQueueState("bot1")).toBeNull();
+  });
+
+  it("clears the persisted row when the queue is empty", () => {
+    const db = createDatabase(":memory:");
+    db.saveQueueState({ botId: "bot1", songs: [song119("a")], currentIndex: 0, mode: "seq", isFmMode: false, fmPlatform: "" });
+    const ctx = makeCtx(true, db);
+    persistQueueSnapshot.call(ctx); // queue is empty
+    expect(db.getQueueState("bot1")).toBeNull();
+  });
+
+  it("restores and resumes the current track on restore", async () => {
+    const db = createDatabase(":memory:");
+    db.saveQueueState({ botId: "bot1", songs: [song119("a"), song119("b")], currentIndex: 1, mode: "loop", isFmMode: false, fmPlatform: "" });
+    const ctx = makeCtx(true, db);
+    await restoreQueueFromSnapshot.call(ctx);
+    expect(ctx.queue.list().map((s: any) => s.id)).toEqual(["a", "b"]);
+    expect(ctx.queue.getCurrentIndex()).toBe(1);
+    expect(ctx.queue.getMode()).toBe(PlayMode.Loop);
+    expect(ctx.resolveAndPlay).toHaveBeenCalledTimes(1);
+  });
+
+  it("restores FM mode + provider from the snapshot", async () => {
+    const db = createDatabase(":memory:");
+    db.saveQueueState({ botId: "bot1", songs: [song119("a")], currentIndex: 0, mode: "random", isFmMode: true, fmPlatform: "qq" });
+    const ctx = makeCtx(true, db);
+    await restoreQueueFromSnapshot.call(ctx);
+    expect(ctx.isFmMode).toBe(true);
+    expect(ctx.getProviderFor).toHaveBeenCalledWith("qq");
+  });
+
+  it("does nothing when the feature is disabled", async () => {
+    const db = createDatabase(":memory:");
+    db.saveQueueState({ botId: "bot1", songs: [song119("a")], currentIndex: 0, mode: "seq", isFmMode: false, fmPlatform: "" });
+    const ctx = makeCtx(false, db);
+    await restoreQueueFromSnapshot.call(ctx);
+    expect(ctx.queue.list()).toEqual([]);
+    expect(ctx.resolveAndPlay).not.toHaveBeenCalled();
+  });
+
+  it("a cancelled snapshot timer does not wipe persisted state (disconnect race)", () => {
+    vi.useFakeTimers();
+    try {
+      const db = createDatabase(":memory:");
+      db.saveQueueState({ botId: "bot1", songs: [song119("a")], currentIndex: 0, mode: "seq", isFmMode: false, fmPlatform: "" });
+      const ctx = makeCtx(true, db);
+      ctx.queue.add(song119("a"));
+      ctx.queue.play();
+      // Debounced snapshot scheduled, then a disconnect clears the queue and
+      // cancels the pending timer — the persisted row must survive for restore.
+      scheduleQueueSnapshot.call(ctx);
+      ctx.queue.clear();
+      if (ctx.snapshotTimer) clearTimeout(ctx.snapshotTimer);
+      vi.advanceTimersByTime(3000);
+      expect(db.getQueueState("bot1")).not.toBeNull();
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+});
+
+describe("BotInstance Bilibili multi-P resolution", () => {
+  it("resolves multi-P search result to P1 with accurate duration and name", async () => {
+    const multiPSongDetail = {
+      id: "BV1multiP?p=1",
+      name: "测试视频 - P1 分P1",
+      artist: "UP主",
+      album: "",
+      duration: 100, // P1 duration
+      coverUrl: "",
+      platform: "bilibili" as const,
+    };
+    const mockBili = {
+      platform: "bilibili" as const,
+      search: vi.fn().mockResolvedValue({
+        songs: [{
+          id: "BV1multiP",
+          name: "测试视频",
+          artist: "UP主",
+          album: "",
+          duration: 300, // total duration in search
+          coverUrl: "",
+          platform: "bilibili",
+        }],
+        albums: [],
+        playlists: [],
+      }),
+      getSongDetail: vi.fn().mockResolvedValue(multiPSongDetail),
+      getSongUrl: vi.fn().mockResolvedValue({ url: "http://audio.test" }),
+    };
+
+    const ctx = {
+      config: { commandPrefix: "!" },
+      lastSearchResults: [] as any[],
+      getProvider: () => mockBili,
+      getProviderFor: () => mockBili,
+    };
+
+    const res = await (BotInstance.prototype as any).resolvePlayQuery.call(ctx, {
+      name: "play",
+      args: "测试视频",
+      rawArgs: ["测试视频"],
+      flags: new Set(),
+    });
+
+    expect(res.song).toBeDefined();
+    expect(res.song.id).toBe("BV1multiP?p=1");
+    expect(res.song.name).toBe("测试视频 - P1 分P1");
+    expect(res.song.duration).toBe(100);
+  });
+});
+
+
+describe("cmdPlaylist with a playlist link (#160)", () => {
+  const cmdPlaylist = (BotInstance.prototype as any).cmdPlaylist as (
+    this: unknown, cmd: { name: string; args: string; rawArgs: string[]; flags: Set<string> },
+  ) => Promise<string>;
+
+  function makeCtx() {
+    const song = { id: "s1", name: "Song", artist: "A", album: "B", duration: 1, coverUrl: "" };
+    const makeProvider = (platform: string) => ({
+      platform,
+      search: vi.fn().mockResolvedValue({ songs: [], playlists: [] }),
+      getPlaylistSongs: vi.fn().mockResolvedValue([song]),
+    });
+    const providers: Record<string, any> = {
+      netease: makeProvider("netease"),
+      qq: makeProvider("qq"),
+      youtube: makeProvider("youtube"),
+    };
+    const queued: any[] = [];
+    return {
+      providers,
+      queued,
+      getProvider: vi.fn(() => providers.netease),
+      getProviderFor: vi.fn((p: string) => providers[p]),
+      assertProviderEnabled: vi.fn(),
+      extractId: (BotInstance.prototype as any).extractId,
+      looksLikeCollectionId: (BotInstance.prototype as any).looksLikeCollectionId,
+      player: { stop: vi.fn() },
+      queue: { clear: vi.fn(), add: (s: any) => queued.push(s), play: () => queued[0] },
+      disableFmMode: vi.fn(),
+      withRequester: (s: any) => s,
+      resolveAndPlay: vi.fn(async () => true),
+      sweepLocalAudio: vi.fn(),
+      emit: vi.fn(),
+    };
+  }
+  const cmd = (args: string, flags: string[] = []) =>
+    ({ name: "playlist", args, rawArgs: args.split(" "), flags: new Set(flags) });
+
+  it("routes a QQ playlist link to QQ even without -q (default is NetEase)", async () => {
+    const ctx = makeCtx();
+    const reply = await cmdPlaylist.call(ctx, cmd("[URL]https://y.qq.com/n/ryqq/playlist/8052190267[/URL]"));
+    expect(ctx.providers.qq.getPlaylistSongs).toHaveBeenCalledWith("8052190267");
+    expect(ctx.providers.netease.getPlaylistSongs).not.toHaveBeenCalled();
+    expect(ctx.queued[0].platform).toBe("qq");
+    expect(reply).toMatch(/^Loaded 1 songs/);
+  });
+
+  it("loads a YouTube playlist link by its list id instead of name-searching the URL", async () => {
+    const ctx = makeCtx();
+    await cmdPlaylist.call(ctx, cmd("https://www.youtube.com/playlist?list=PLabc123"));
+    expect(ctx.providers.youtube.getPlaylistSongs).toHaveBeenCalledWith("PLabc123");
+    expect(ctx.providers.netease.search).not.toHaveBeenCalled();
+  });
+
+  it("checks the link's platform is enabled", async () => {
+    const ctx = makeCtx();
+    ctx.assertProviderEnabled.mockImplementation(() => { throw new Error("音源未启用：qq"); });
+    await expect(cmdPlaylist.call(ctx, cmd("https://y.qq.com/n/ryqq/playlist/1"))).rejects.toThrow("音源未启用");
+  });
+
+  it("keeps the old behavior for a bare id", async () => {
+    const ctx = makeCtx();
+    await cmdPlaylist.call(ctx, cmd("2829883282"));
+    expect(ctx.providers.netease.getPlaylistSongs).toHaveBeenCalledWith("2829883282");
+  });
+});
@@ -3,6 +3,7 @@ import {
  TS3Client,
  type TS3ClientOptions,
  type TS3TextMessage,
+  type TS3VoiceActivity,
 } from "../ts-protocol/client.js";
 import { AudioPlayer } from "../audio/player.js";
 import { PlayQueue, PlayMode, type QueuedSong } from "../audio/queue.js";
@@ -12,15 +13,22 @@ import {
  canRunCommand,
  type ParsedCommand,
 } from "./commands.js";
-import { parseSongRef, parseSelectionIndex } from "./song-ref.js";
+import {
+  parseSongRef,
+  parseSelectionIndex,
+  parsePlaylistRef,
+  findShareShortLink,
+  resolveShareLink,
+} from "./song-ref.js";
 import { splitTextIntoChunks } from "./text-chunk.js";
 import type { Logger } from "../logger.js";
-import type { BotDatabase, ProfileConfig } from "../data/database.js";
+import { SHARED_QUEUE_OWNER, type BotDatabase, type ProfileConfig, type StoredSong } from "../data/database.js";
 import {
  isProviderEnabled,
  defaultPlatform,
  type BotConfig,
  type SpotifyConfig,
+  type VoiceDuckingConfig,
 } from "../data/config.js";
 import type { JellyfinPlaybackReporter } from "../music/jellyfin.js";
 import { BotProfileManager } from "./profile.js";
@@ -35,10 +43,29 @@ import path from "node:path";
 import { SpotifyController } from "../music/spotify/controller.js";
 import type { SpotifyTrackEndedEvent } from "../music/spotify/backend.js";
 import type { SpotifyOAuth } from "../music/spotify/spotify-oauth.js";
+import { VoiceDuckingController } from "./voice-ducking.js";
+import {
+  ManagedVoiceClientRegistry,
+  type ManagedVoiceClientOwnerToken,
+  type ManagedVoiceClientScope,
+} from "./managed-voice-clients.js";

 /** Reply sent when a non-admin invokes an admin-only chat command. */
 export const COMMAND_DENIED_MESSAGE = "⛔ 需要管理员权限（该命令仅限管理员服务器组）";

+/** Maps the persisted / command-line play-mode string to the PlayMode enum.
+ *  Shared by the !mode command and the restart-restore path (#125). */
+const PLAY_MODE_BY_VALUE: Record<string, PlayMode> = {
+  seq: PlayMode.Sequential,
+  loop: PlayMode.Loop,
+  random: PlayMode.Random,
+  rloop: PlayMode.RandomLoop,
+};
+
+// Keep a disconnected bot id classified as managed briefly so UDP packets
+// already in flight cannot make another local bot duck during teardown.
+const MANAGED_VOICE_CLIENT_RELEASE_GRACE_MS = 1_000;
+
 /** Fallback message when Spotify audio can't be served (backend unavailable
 *  OR a per-track playTrack failure against a dead/failed sidecar). */
 const SPOTIFY_UNAVAILABLE_MESSAGE =
@@ -91,6 +118,8 @@ export interface BotInstanceOptions {
  config: BotConfig;
  logger: Logger;
  avatarStore: AvatarStore;
+  /** Shared across one manager so its bots do not trigger one another. */
+  managedVoiceClients?: ManagedVoiceClientRegistry;
  /** Base dir (under DATA_DIR) for per-bot go-librespot work/config trees. */
  spotifyDataDir?: string;
  /** Process-wide shared Spotify OAuth (single account); injected into the
@@ -130,6 +159,14 @@ export class BotInstance extends EventEmitter {

  private tsClient: TS3Client;
  private player: AudioPlayer;
+  private voiceDucking: VoiceDuckingController;
+  private managedVoiceClients: ManagedVoiceClientRegistry;
+  private readonly configuredVoiceServerScope: ManagedVoiceClientScope;
+  private voiceServerScope: ManagedVoiceClientScope;
+  private registeredVoiceClientId = 0;
+  private registeredVoiceClientOwner: ManagedVoiceClientOwnerToken | null = null;
+  private registeredVoiceClientScope: ManagedVoiceClientScope | null = null;
+  private registeredVoiceClientUid: string | null = null;
  private spotifyController: SpotifyController;
  private queue: PlayQueue;
  private neteaseProvider: MusicProvider;
@@ -166,6 +203,8 @@ export class BotInstance extends EventEmitter {
  /** Per-bot Jellyfin playback-report session (start / ~10s progress / stop).
   *  null when the wired provider has no reporting capability. */
  private jellyfinReporter: JellyfinPlaybackReporter | null = null;
+  /** Debounce handle for the live-queue snapshot writer (Feature 2, #119). */
+  private snapshotTimer: ReturnType<typeof setTimeout> | null = null;

  constructor(options: BotInstanceOptions) {
    super();
@@ -186,8 +225,32 @@ export class BotInstance extends EventEmitter {

    this.tsClient = new TS3Client(options.tsOptions, this.logger);
    this.player = new AudioPlayer(this.logger);
+    this.voiceDucking = new VoiceDuckingController(
+      this.player,
+      this.config.voiceDucking ?? { enabled: false, volumePercent: 30 },
+    );
+    this.managedVoiceClients =
+      options.managedVoiceClients ?? new ManagedVoiceClientRegistry();
+    this.configuredVoiceServerScope = {
+      host: options.tsOptions.host,
+      voicePort: options.tsOptions.port,
+    };
+    this.voiceServerScope = { ...this.configuredVoiceServerScope };
    this.queue = new PlayQueue();

+    // Restore persisted per-bot player settings (#125): volume + play mode
+    // survive restarts. getPlayerSettings returns validated values (the in-memory
+    // defaults when the row/column is absent), so this is a harmless no-op for a
+    // brand-new bot and reproduces the saved state for an existing one.
+    try {
+      const settings = this.database.getPlayerSettings(this.id);
+      this.player.setVolume(settings.volume);
+      const restoredMode = PLAY_MODE_BY_VALUE[settings.playMode];
+      if (restoredMode) this.queue.setMode(restoredMode);
+    } catch (err) {
+      this.logger.warn({ err }, "Failed to restore player settings — using defaults");
+    }
+
    // Structural typing (like localProvider.sweepUnreferenced): only the real
    // JellyfinProvider exposes createPlaybackReporter, so the netease fallback
    // provider simply leaves reporting off.
@@ -238,7 +301,13 @@ export class BotInstance extends EventEmitter {
      const relPath = this.database.getCustomAvatarPath(this.id);
      if (relPath) {
        const buf = this.avatarStore.read(relPath);
-        if (buf) this.profileManager.setCustomAvatar(buf);
+        // loadCustomAvatar, NOT setCustomAvatar (#148): we are still in the
+        // constructor, so tsClient has not connected. setCustomAvatar would
+        // start a file transfer right here and fail. profileManager.onConnect()
+        // uploads it for real once the handshake completes.
+        // `length > 0` because avatarStore.write is delete-then-write, so a
+        // crash mid-write leaves a 0-byte file that is truthy as a Buffer.
+        if (buf && buf.length > 0) this.profileManager.loadCustomAvatar(buf);
      }
    } catch (err) {
      this.logger.warn({ err }, "Failed to load custom avatar — skipping");
@@ -246,6 +315,11 @@ export class BotInstance extends EventEmitter {

    this.setupPlayerEvents();
    this.setupTsEvents();
+
+    // Feature 2 (#119): persist a debounced snapshot of the live queue whenever
+    // it changes, so it can be restored + resumed after a restart. Inert unless
+    // config.savedQueuesEnabled is on (checked inside the scheduler).
+    this.on("stateChange", () => this.scheduleQueueSnapshot());
  }

  private setupPlayerEvents(): void {
@@ -329,6 +403,17 @@ export class BotInstance extends EventEmitter {
      // this.connected was never flipped to true. Previously this handler
      // short-circuited on !this.connected, leaving player stuck as "playing".
      this.connected = false;
+      this.unregisterManagedVoiceClient(MANAGED_VOICE_CLIENT_RELEASE_GRACE_MS);
+      this.voiceDucking.reset(true);
+      // Cancel any pending live-queue snapshot BEFORE clearing the queue: a
+      // debounced snapshot firing after clear() would persist an empty queue
+      // (clearQueueState), wiping the state we want to restore on reconnect —
+      // and since a manual stop→start reuses the same botId, that would clobber
+      // the new instance's restored row (#119).
+      if (this.snapshotTimer) {
+        clearTimeout(this.snapshotTimer);
+        this.snapshotTimer = null;
+      }
      this.spotifyController.stop();
      this.currentSourceIsSpotify = false;
      this.player.stop();
@@ -351,6 +436,17 @@ export class BotInstance extends EventEmitter {
      this._startJellyfinReportPoller();
    });

+    this.tsClient.on("voiceActivity", (activity: TS3VoiceActivity) => {
+      if (!this.connected) return;
+      if (
+        this.managedVoiceClients.hasClientUid(activity.clientUid) ||
+        this.managedVoiceClients.has(this.voiceServerScope, activity.clientId)
+      ) {
+        return;
+      }
+      this.voiceDucking.handleVoiceActivity(activity.clientId);
+    });
+
    // React near-instantly to channel membership changes. The 30s idle
    // poller remains the fallback if any of these events are missed.
    //
@@ -362,8 +458,60 @@ export class BotInstance extends EventEmitter {
      this._resumeIfReturning();
      void this.refreshOccupancy();
    });
-    this.tsClient.on("clientLeave", () => void this.refreshOccupancy());
-    this.tsClient.on("clientMoved", () => void this.refreshOccupancy());
+    this.tsClient.on("clientLeave", (event: { id: number }) => {
+      this.voiceDucking.removeSpeaker(event.id);
+      void this.refreshOccupancy();
+    });
+    this.tsClient.on("clientMoved", (event: { id: number }) => {
+      if (event.id === this.tsClient.getClientId()) {
+        // Moving the bot invalidates every activity deadline from its old
+        // channel even if no individual leave events arrive.
+        this.voiceDucking.reset(false);
+      } else {
+        this.voiceDucking.removeSpeaker(event.id);
+      }
+      void this.refreshOccupancy();
+    });
+  }
+
+  private registerManagedVoiceClient(): void {
+    this.unregisterManagedVoiceClient();
+    const clientId = this.tsClient.getClientId();
+    if (!Number.isSafeInteger(clientId) || clientId <= 0) return;
+
+    const owner = {};
+    const scope = { ...this.voiceServerScope };
+    const clientUid = this.tsClient.getClientUid();
+    if (this.managedVoiceClients.register(scope, clientId, owner, clientUid)) {
+      this.registeredVoiceClientId = clientId;
+      this.registeredVoiceClientOwner = owner;
+      this.registeredVoiceClientScope = scope;
+      this.registeredVoiceClientUid = clientUid;
+    }
+  }
+
+  private unregisterManagedVoiceClient(graceMs = 0): void {
+    const clientId = this.registeredVoiceClientId;
+    const owner = this.registeredVoiceClientOwner;
+    const clientUid = this.registeredVoiceClientUid ?? undefined;
+    const scope = this.registeredVoiceClientScope
+      ? { ...this.registeredVoiceClientScope }
+      : { ...this.voiceServerScope };
+    this.registeredVoiceClientId = 0;
+    this.registeredVoiceClientOwner = null;
+    this.registeredVoiceClientScope = null;
+    this.registeredVoiceClientUid = null;
+    if (clientId <= 0 || owner === null) return;
+
+    const unregister = () => {
+      this.managedVoiceClients.unregister(scope, clientId, owner, clientUid);
+    };
+    if (graceMs > 0) {
+      const timer = setTimeout(unregister, graceMs);
+      timer.unref?.();
+    } else {
+      unregister();
+    }
  }

  /**
@@ -402,6 +550,13 @@ export class BotInstance extends EventEmitter {
  async connect(): Promise<void> {
    this.disconnectEmitted = false;
    await this.tsClient.connect();
+    const resolvedEndpoint = this.tsClient.getResolvedVoiceEndpoint();
+    this.voiceServerScope = {
+      host:
+        resolvedEndpoint?.host ?? this.configuredVoiceServerScope.host,
+      voicePort:
+        resolvedEndpoint?.port ?? this.configuredVoiceServerScope.voicePort,
+    };
    // Race guard: if disconnect() was called while the handshake was
    // awaiting, don't flip connected back to true — that would leave the
    // bot in an inconsistent state (externally "connected" but the tsClient
@@ -410,12 +565,31 @@ export class BotInstance extends EventEmitter {
      throw new Error("Connect aborted by concurrent disconnect");
    }
    this.connected = true;
+    // Register only after the outer lifecycle race guard succeeds. The TS
+    // wrapper emits its own "connected" event before connect() resolves, so
+    // registering in that callback could let a cancelled, late handshake
+    // overwrite a newer instance that reused the same client id.
+    this.voiceDucking.reset(true);
+    this.registerManagedVoiceClient();
    this.profileManager.onConnect();
    this.emit("connected");
+    // Feature 2 (#119): restore + resume the live queue persisted before the
+    // last shutdown. Best-effort and gated on savedQueuesEnabled; runs after
+    // the bot is fully connected so resolveAndPlay can actually push audio.
+    void this.restoreQueueFromSnapshot();
  }

  disconnect(): void {
    this._cancelIdleTimer();
+    this.voiceDucking.reset(true);
+    // Cancel any pending live-queue snapshot before clearing so it can't fire
+    // afterwards and persist an empty queue over the state we keep for restore
+    // (#119). The disconnected handler cancels too, but do it here as well for
+    // the path where tsClient.disconnect() doesn't re-emit "disconnected".
+    if (this.snapshotTimer) {
+      clearTimeout(this.snapshotTimer);
+      this.snapshotTimer = null;
+    }
    this.spotifyController.stop();
    this.currentSourceIsSpotify = false;
    this.player.stop();
@@ -428,6 +602,10 @@ export class BotInstance extends EventEmitter {
      this.emit("disconnected");
    }
    this.tsClient.disconnect();
+    // Stop outbound PCM and initiate the TeamSpeak disconnect before removing
+    // our id from the shared registry, minimizing the window in which another
+    // managed bot could mistake our final packet for a human speaker.
+    this.unregisterManagedVoiceClient(MANAGED_VOICE_CLIENT_RELEASE_GRACE_MS);
  }

  /** 外部更新 idleTimeoutMinutes（由 API 保存时调用） */
@@ -450,6 +628,12 @@ export class BotInstance extends EventEmitter {
    }
  }

+  /** Hot-apply voice ducking without mutating the user's base player volume. */
+  updateVoiceDucking(settings: VoiceDuckingConfig): void {
+    this.config.voiceDucking = { ...settings };
+    this.voiceDucking.updateSettings(settings);
+  }
+
  private _startIdlePoller(): void {
    // 每 30 秒检查一次频道人数
    const poll = async () => {
@@ -698,6 +882,12 @@ export class BotInstance extends EventEmitter {
        return this.cmdMove(cmd);
      case "follow":
        return this.cmdFollow(msg);
+      case "save":
+        return this.cmdSaveQueue(cmd);
+      case "load":
+        return this.cmdLoadQueue(cmd);
+      case "queues":
+        return this.cmdListQueues();
      case "help":
        return this.cmdHelp();
      default:
@@ -784,6 +974,14 @@ export class BotInstance extends EventEmitter {
    this.voteSkipUsers.clear();
    const provider = this.getProviderFor(song.platform);
    try {
+      if (song.platform === "bilibili" && (!song.id.includes("?p=") || song.duration === 0)) {
+        const detail = await provider.getSongDetail(song.id);
+        if (detail) {
+          song.duration = detail.duration;
+          song.name = detail.name;
+          song.id = detail.id;
+        }
+      }
      const result = await provider.getSongUrl(song.id);
      if (!result?.url) {
        this.logger.warn({ songId: song.id, name: song.name }, "No URL available, skipping");
@@ -935,9 +1133,9 @@ export class BotInstance extends EventEmitter {
  /**
   * Resolve a !play/!add/!playnext argument into a single Song, supporting three
   * forms (issue #90):
-   *   1) "#N"          — the Nth result of the previous !search
-   *   2) id:<id> / URL — an exact song (disambiguates same-name songs)
-   *   3) plain text    — search, returning the single most-popular hit (legacy)
+   *   1) "#N"           — the Nth result of the previous !search
+   *   2) id <id> / URL  — an exact song (disambiguates same-name songs)
+   *   3) plain text     — search, returning the single most-popular hit (legacy)
   */
  private async resolvePlayQuery(cmd: ParsedCommand): Promise<{ song?: Song; error?: string }> {
    const args = (cmd.args ?? "").trim();
@@ -950,10 +1148,15 @@ export class BotInstance extends EventEmitter {
        return { error: `No recent search. Use ${p}search <name> first.` };
      if (sel > this.lastSearchResults.length)
        return { error: `Invalid selection #${sel}. ${p}search returned ${this.lastSearchResults.length} results.` };
-      return { song: this.lastSearchResults[sel - 1] };
+      let song = this.lastSearchResults[sel - 1];
+      if (song.platform === "bilibili") {
+        const detail = await this.getProviderFor("bilibili").getSongDetail(song.id);
+        if (detail) song = { ...detail, platform: "bilibili" };
+      }
+      return { song };
    }

-    // 2) id:/URL — fetch that exact song.
+    // 2) id/URL — fetch that exact song.
    const ref = parseSongRef(args);
    if (ref) {
      if (ref.platform) this.assertProviderEnabled(ref.platform);
@@ -967,7 +1170,12 @@ export class BotInstance extends EventEmitter {
    const provider = this.getProvider(cmd.flags);
    const result = await provider.search(args, 1);
    if (result.songs.length === 0) return { error: `No results found for: ${args}` };
-    return { song: { ...result.songs[0], platform: provider.platform } };
+    let song = result.songs[0];
+    if (provider.platform === "bilibili") {
+      const detail = await provider.getSongDetail(song.id);
+      if (detail) song = detail;
+    }
+    return { song: { ...song, platform: provider.platform } };
  }

  private async cmdSearch(cmd: ParsedCommand): Promise<string> {
@@ -981,38 +1189,107 @@ export class BotInstance extends EventEmitter {
      (s, i) => `${i + 1}. ${s.name} - ${s.artist}${s.album ? ` 《${s.album}》` : ""} [id:${s.id}]`,
    );
    return [
-      `搜索结果（用 ${p}play #序号 播放，或 ${p}play id:<id>）:`,
+      `搜索结果（用 ${p}play #序号 播放，或 ${p}play id <id>）:`,
      ...lines,
    ].join("\n");
  }

  private async cmdPlay(cmd: ParsedCommand, requesterName?: string): Promise<string> {
-    if (!cmd.args) return `Usage: ${this.config.commandPrefix}play <song name | #N | id:<id> | URL>`;
+    if (!cmd.args) return `Usage: ${this.config.commandPrefix}play <song name | #N | id <id> | URL>`;
    const { song, error } = await this.resolvePlayQuery(cmd);
    if (error) return error;
    const song0 = song!;
+    const ok = await this.playSingleSong(song0, requesterName);
+    if (!ok) return `Cannot play: ${song0.name}`;
+    return `Now playing: ${song0.name} - ${song0.artist}`;
+  }
+
+  /**
+   * Play a single resolved song immediately, honoring config.playKeepsQueue:
+   *  - false (default): clear the queue and play only this song — today's
+   *    behavior. The prior track is stopped and released local uploads swept.
+   *  - true (and the queue is non-empty): insert the song after the current
+   *    track and jump to it (reusing addNext + playAt — no new queue logic), so
+   *    the rest of the queue survives and continues after it. FM auto-refill is
+   *    stopped (manual takeover), but existing queued songs are preserved.
+   *
+   * Shared by chat !play and the web /play-song route so the toggle decision
+   * lives in exactly one place (#119). Returns true if a track started playing.
+   */
+  async playSingleSong(song: QueuedSong, requesterName?: string): Promise<boolean> {
+    const s = this.withRequester(song, requesterName);
+    if (this.config.playKeepsQueue && !this.queue.isEmpty()) {
+      const insertedAt =
+        this.queue.getCurrentIndex() < 0
+          ? this.queue.size()
+          : this.queue.getCurrentIndex() + 1;
+      this.player.stop();
+      this.disableFmMode();
+      this.queue.addNext(s);
+      this.queue.playAt(insertedAt);
+      this.player.resetFailures();
+      // No sweep here: the queue is kept, so no local uploads were released.
+      return this.resolveAndPlay(this.queue.current()!);
+    }
+    // Legacy replace behavior (default).
    const previous = this.queue.current();
-    if (previous && !this.isSameSong(previous, song0)) {
+    if (previous && !this.isSameSong(previous, s)) {
      this.player.stop();
    }
    this.queue.clear();
    this.disableFmMode();
-    this.queue.add(this.withRequester(song0, requesterName));
+    this.queue.add(s);
    this.queue.play();

    // Reset failure counter on user-initiated play
    this.player.resetFailures();
    const ok = await this.resolveAndPlay(this.queue.current()!);
    // Sweep AFTER the new song is queued+resolved: the replaced songs are no
-    // longer referenced (and get deleted), but song0 — if it is the same local
-    // upload that was already playing — stays referenced and is preserved.
+    // longer referenced (and get deleted), but the song — if it is the same
+    // local upload that was already playing — stays referenced and is preserved.
    this.sweepLocalAudio("replaced");
-    if (!ok) return `Cannot play: ${song0.name}`;
-    return `Now playing: ${song0.name} - ${song0.artist}`;
+    return ok;
+  }
+
+  /**
+   * Load a saved song list into this bot's queue (#119). `replace` clears +
+   * plays from the first track (exits FM, like a fresh collection load);
+   * `append` adds to the end and only starts playing if the bot was idle
+   * (never interrupts a playing track). Loaded songs are re-tagged with the
+   * loader's name so play-history attribution stays correct.
+   */
+  async loadSavedQueue(
+    songs: StoredSong[],
+    mode: "replace" | "append",
+    requesterName?: string,
+  ): Promise<void> {
+    const tagged = songs.map((s) =>
+      this.withRequester({ ...(s as QueuedSong) }, requesterName),
+    );
+    if (mode === "replace") {
+      this.player.stop();
+      this.queue.clear();
+      this.disableFmMode();
+      for (const s of tagged) this.queue.add(s);
+      this.sweepLocalAudio("queue_replaced");
+      const first = this.queue.play();
+      this.player.resetFailures();
+      if (first) await this.resolveAndPlay(first);
+    } else {
+      const wasIdle = this.player.getState() === "idle";
+      const startAt = this.queue.size();
+      for (const s of tagged) this.queue.add(s);
+      if (wasIdle && this.queue.size() > startAt) {
+        this.queue.playAt(startAt);
+        this.player.resetFailures();
+        await this.resolveAndPlay(this.queue.current()!);
+      }
+    }
+    this.emit("stateChange");
  }

  private async cmdAdd(cmd: ParsedCommand, requesterName?: string): Promise<string> {
-    if (!cmd.args) return `Usage: ${this.config.commandPrefix}add <song name | #N | id:<id> | URL>`;
+    if (!cmd.args) return `Usage: ${this.config.commandPrefix}add <song name | #N | id <id> | URL>`;
    const { song, error } = await this.resolvePlayQuery(cmd);
    if (error) return error;
    const s = song!;
@@ -1036,7 +1313,7 @@ export class BotInstance extends EventEmitter {
  }

  private async cmdPlayNext(cmd: ParsedCommand, requesterName?: string): Promise<string> {
-    if (!cmd.args) return `Usage: ${this.config.commandPrefix}playnext <song name | #N | id:<id> | URL>`;
+    if (!cmd.args) return `Usage: ${this.config.commandPrefix}playnext <song name | #N | id <id> | URL>`;
    const { song, error } = await this.resolvePlayQuery(cmd);
    if (error) return error;
    const s = song!;
@@ -1136,10 +1413,36 @@ export class BotInstance extends EventEmitter {
    const vol = parseInt(cmd.args, 10);
    if (isNaN(vol) || vol < 0 || vol > 100) return "Usage: !vol <0-100>";
    this.player.setVolume(vol);
+    // Persist so the volume survives a restart (#125). Both the chat !vol command
+    // and the WebUI/REST volume endpoint funnel through here, so one write covers
+    // every entry point. Only volume is written — play mode is saved independently.
+    this.persistVolume();
    this.emit("stateChange");
    return `Volume set to ${vol}%`;
  }

+  /** Persist the current volume (#125). Best-effort: a DB error must never break
+   *  the volume change itself. */
+  private persistVolume(): void {
+    try {
+      this.database.saveVolume(this.id, this.player.getVolume());
+    } catch (err) {
+      this.logger.warn({ err }, "Failed to persist volume");
+    }
+  }
+
+  /** Persist the current play mode (#125). Best-effort, mirrors persistVolume.
+   *  Called ONLY from the explicit !mode command — NOT from FM/artist mode, whose
+   *  Random/Loop switch is a transient side effect that must not overwrite the
+   *  user's saved preference. */
+  private persistPlayMode(): void {
+    try {
+      this.database.savePlayMode(this.id, this.queue.getMode());
+    } catch (err) {
+      this.logger.warn({ err }, "Failed to persist play mode");
+    }
+  }
+
  private cmdNow(): string {
    const song = this.queue.current();
    if (!song) return "Nothing is playing";
@@ -1205,22 +1508,32 @@ export class BotInstance extends EventEmitter {
  }

  private cmdMode(cmd: ParsedCommand): string {
-    const modeMap: Record<string, PlayMode> = {
-      seq: PlayMode.Sequential,
-      loop: PlayMode.Loop,
-      random: PlayMode.Random,
-      rloop: PlayMode.RandomLoop,
-    };
-    const mode = modeMap[cmd.args];
+    const mode = PLAY_MODE_BY_VALUE[cmd.args];
    if (mode === undefined) return "Usage: !mode <seq|loop|random|rloop>";
    this.queue.setMode(mode);
+    // Persist so the play mode survives a restart (#125). The chat !mode command
+    // and the WebUI/REST mode endpoint both funnel through here.
+    this.persistPlayMode();
    this.emit("stateChange");
    return `Play mode set to: ${cmd.args}`;
  }

  private async cmdPlaylist(cmd: ParsedCommand, requesterName?: string): Promise<string> {
-    if (!cmd.args) return "Usage: !playlist <playlist name or ID>";
-    const provider = this.getProvider(cmd.flags);
+    if (!cmd.args) return "Usage: !playlist <playlist name, ID or link>";
+
+    // A playlist link (#160) names its own platform, so it wins over flags.
+    // App share short links are followed one hop to the real URL first.
+    let ref = parsePlaylistRef(cmd.args);
+    if (!ref) {
+      const shortLink = findShareShortLink(cmd.args);
+      if (shortLink) {
+        const target = await resolveShareLink(shortLink);
+        ref = target ? parsePlaylistRef(target) : null;
+        if (!ref) return "Could not open that share link — paste the full playlist link or its ID instead";
+      }
+    }
+    if (ref) this.assertProviderEnabled(ref.platform);
+    const provider = ref ? this.getProviderFor(ref.platform) : this.getProvider(cmd.flags);

    // Determine if input is a direct ID (numeric / Jellyfin GUID) or a name search
    const id = this.extractId(cmd.args);
@@ -1228,7 +1541,9 @@ export class BotInstance extends EventEmitter {

    let playlistId: string;

-    if (isDirectId || id !== cmd.args) {
+    if (ref) {
+      playlistId = ref.id;
+    } else if (isDirectId || id !== cmd.args) {
      // Input is a direct ID or URL containing an ID — use existing logic
      playlistId = id;
    } else {
@@ -1439,6 +1754,122 @@ export class BotInstance extends EventEmitter {
    return "Following you to your channel";
  }

+  // ─── Saved queues (chat side, #119) ──────────────────────────────────────
+  // TeamSpeak users have no WebUI account, so chat save/load always uses the
+  // reserved SHARED_QUEUE_OWNER bucket. All three commands are inert (reply
+  // "此功能未启用") unless the admin enabled savedQueuesEnabled.
+
+  private savedQueuesGuard(): string | null {
+    return this.config.savedQueuesEnabled ? null : "此功能未启用";
+  }
+
+  private cmdSaveQueue(cmd: ParsedCommand): string {
+    const off = this.savedQueuesGuard();
+    if (off) return off;
+    const name = cmd.args.trim();
+    if (!name) return `Usage: ${this.config.commandPrefix}save <名称>`;
+    const songs = this.queue.list();
+    if (songs.length === 0) return "队列为空，无法保存";
+    try {
+      const saved = this.database.saveQueue(SHARED_QUEUE_OWNER, name, songs);
+      return `已保存队列「${name}」（${saved.songCount} 首）`;
+    } catch (err) {
+      return `保存失败：${(err as Error).message}`;
+    }
+  }
+
+  private async cmdLoadQueue(cmd: ParsedCommand): Promise<string> {
+    const off = this.savedQueuesGuard();
+    if (off) return off;
+    const name = cmd.args.trim();
+    if (!name) return `Usage: ${this.config.commandPrefix}load [-a] <名称>`;
+    const meta = this.database
+      .listSavedQueues(SHARED_QUEUE_OWNER, false)
+      .find((q) => q.name === name);
+    const full = meta ? this.database.getSavedQueue(meta.id) : null;
+    if (!full) return `找不到已保存队列「${name}」`;
+    const mode = cmd.flags.has("a") ? "append" : "replace";
+    await this.loadSavedQueue(full.songs, mode);
+    return mode === "append"
+      ? `已追加「${name}」（${full.songs.length} 首）到队列`
+      : `已加载「${name}」（${full.songs.length} 首）`;
+  }
+
+  private cmdListQueues(): string {
+    const off = this.savedQueuesGuard();
+    if (off) return off;
+    const list = this.database.listSavedQueues(SHARED_QUEUE_OWNER, false);
+    if (list.length === 0) return "还没有已保存的队列";
+    return ["已保存队列：", ...list.map((q) => `• ${q.name}（${q.songCount} 首）`)].join("\n");
+  }
+
+  // ─── Live-queue persistence (Feature 2, #119) ────────────────────────────
+
+  /** Synchronous snapshot writer. Persists the live queue (or clears the row
+   *  when empty). Best-effort — a DB failure logs and never interrupts play. */
+  private persistQueueSnapshot(): void {
+    if (!this.config.savedQueuesEnabled) return;
+    try {
+      const snap = this.queue.snapshot();
+      if (snap.songs.length === 0) {
+        this.database.clearQueueState(this.id);
+        return;
+      }
+      this.database.saveQueueState({
+        botId: this.id,
+        songs: snap.songs,
+        currentIndex: snap.currentIndex,
+        mode: snap.mode,
+        isFmMode: this.isFmMode,
+        fmPlatform: this.isFmMode && this.fmProvider ? this.fmProvider.platform : "",
+      });
+    } catch (err) {
+      this.logger.warn({ err }, "queue snapshot persist failed");
+    }
+  }
+
+  /** Debounce the snapshot writer (~1s) off the stateChange firehose. */
+  private scheduleQueueSnapshot(): void {
+    if (!this.config.savedQueuesEnabled) return;
+    if (this.snapshotTimer) clearTimeout(this.snapshotTimer);
+    this.snapshotTimer = setTimeout(() => this.persistQueueSnapshot(), 1000);
+    // Don't keep the event loop alive just for a pending snapshot.
+    this.snapshotTimer.unref?.();
+  }
+
+  /** Restore + resume the live queue after (re)connect. Best-effort: resumes
+   *  the current track from its START (URLs are re-resolved; no persisted
+   *  elapsed). Spotify resume depends on the sidecar being available. */
+  private async restoreQueueFromSnapshot(): Promise<void> {
+    if (!this.config.savedQueuesEnabled) return;
+    let st;
+    try {
+      st = this.database.getQueueState(this.id);
+    } catch (err) {
+      this.logger.warn({ err }, "queue snapshot restore failed to read state");
+      return;
+    }
+    if (!st || st.songs.length === 0) return;
+    this.queue.restore({
+      songs: st.songs,
+      currentIndex: st.currentIndex,
+      mode: st.mode as PlayMode,
+    });
+    if (st.isFmMode && st.fmPlatform) {
+      this.isFmMode = true;
+      this.fmProvider = this.getProviderFor(st.fmPlatform as Platform);
+    }
+    const current = this.queue.current();
+    if (current) {
+      this.player.resetFailures();
+      await this.resolveAndPlay(current);
+    }
+    this.logger.info(
+      { count: st.songs.length, index: st.currentIndex },
+      "Restored live queue from snapshot",
+    );
+  }
+
  private cmdHelp(): string {
    const p = this.config.commandPrefix;
    const def = defaultPlatform(this.config);
@@ -1454,8 +1885,8 @@ export class BotInstance extends EventEmitter {
      ...(flagHelp ? [`  Source flags: ${flagHelp}`] : []),
      `${p}search <name> — List top matches to pick a specific (same-name) song`,
      `${p}play #N       — Play the Nth result of the last ${p}search`,
-      `${p}play id:<id>  — Play an exact song by id / URL`,
-      `${p}add <song>   — Add to queue (also accepts #N / id: / URL)`,
+      `${p}play id <id> — Play an exact song by id / URL`,
+      `${p}add <song>   — Add to queue (also accepts #N / id <id> / URL)`,
      `${p}playnext <song> — Insert as next song (alias: ${p}pn)`,
      `${p}pause/resume — Pause/resume`,
      `${p}next/prev    — Next/previous`,
@@ -1468,6 +1899,13 @@ export class BotInstance extends EventEmitter {
      `${p}album <name or id> — Load album`,
      `${p}fm           — Personal FM (default source: ${def}; source flags work too)`,
      `${p}artist <name> — Play songs by artist (loop)`,
+      ...(this.config.savedQueuesEnabled
+        ? [
+            `${p}save <名称>  — Save current queue`,
+            `${p}load [-a] <名称> — Load a saved queue (-a appends)`,
+            `${p}queues       — List saved queues`,
+          ]
+        : []),
      `${p}vote         — Vote to skip`,
      `${p}lyrics       — Show lyrics`,
      `${p}now          — Current song info`,
@@ -0,0 +1,181 @@
+import { describe, expect, it } from "vitest";
+import {
+  ManagedVoiceClientRegistry,
+  normalizeManagedVoiceClientScope,
+  normalizeManagedVoiceHost,
+} from "./managed-voice-clients.js";
+
+describe("managed voice client scope normalization", () => {
+  it("normalizes DNS host casing, whitespace, and trailing root dots", () => {
+    expect(normalizeManagedVoiceHost("  Voice.Example.COM...  ")).toBe(
+      "voice.example.com",
+    );
+    expect(
+      normalizeManagedVoiceClientScope({
+        host: "VOICE.EXAMPLE.COM.",
+        voicePort: 9987,
+      }),
+    ).toEqual({ host: "voice.example.com", voicePort: 9987 });
+  });
+
+  it("treats bracketed and equivalent expanded IPv6 literals as one host", () => {
+    expect(normalizeManagedVoiceHost("[2001:0DB8:0:0:0:0:0:1]")).toBe(
+      "2001:db8::1",
+    );
+    expect(normalizeManagedVoiceHost("2001:db8::1")).toBe("2001:db8::1");
+  });
+
+  it("rejects empty hosts and invalid voice ports", () => {
+    expect(
+      normalizeManagedVoiceClientScope({ host: " . ", voicePort: 9987 }),
+    ).toBeNull();
+    expect(
+      normalizeManagedVoiceClientScope({ host: "example.com", voicePort: 0 }),
+    ).toBeNull();
+    expect(
+      normalizeManagedVoiceClientScope({
+        host: "example.com",
+        voicePort: 65_536,
+      }),
+    ).toBeNull();
+  });
+
+});
+
+describe("ManagedVoiceClientRegistry", () => {
+  it("finds clients through normalized forms of the same scope", () => {
+    const registry = new ManagedVoiceClientRegistry();
+    const owner = Symbol("connection");
+
+    expect(
+      registry.register(
+        { host: " Voice.Example.COM. ", voicePort: 9987 },
+        42,
+        owner,
+      ),
+    ).toBe(true);
+    expect(
+      registry.has({ host: "voice.example.com", voicePort: 9987 }, 42),
+    ).toBe(true);
+  });
+
+  it("keeps different voice ports and hosts in separate scopes", () => {
+    const registry = new ManagedVoiceClientRegistry();
+    registry.register(
+      { host: "voice.example.com", voicePort: 9987 },
+      7,
+      Symbol("connection"),
+    );
+
+    expect(
+      registry.has({ host: "voice.example.com", voicePort: 9988 }, 7),
+    ).toBe(false);
+    expect(
+      registry.has({ host: "other.example.com", voicePort: 9987 }, 7),
+    ).toBe(false);
+  });
+
+  it("finds a managed bot by stable client UID across network endpoints", () => {
+    const registry = new ManagedVoiceClientRegistry();
+    const owner = Symbol("connection");
+
+    registry.register(
+      { host: "127.0.0.1", voicePort: 9987 },
+      17,
+      owner,
+      "  managed-client-uid=  ",
+    );
+
+    expect(registry.hasClientUid("managed-client-uid=")).toBe(true);
+    expect(
+      registry.has({ host: "192.168.1.10", voicePort: 20_000 }, 17),
+    ).toBe(false);
+  });
+
+  it("keeps a shared managed UID until its last owner unregisters", () => {
+    const registry = new ManagedVoiceClientRegistry();
+    const scope = { host: "203.0.113.4", voicePort: 9987 };
+    const first = Symbol("first connection");
+    const second = Symbol("second connection");
+    registry.register(scope, 18, first, "shared-client-uid=");
+    registry.register(scope, 19, second, "shared-client-uid=");
+
+    expect(registry.unregister(scope, 18, first, "shared-client-uid=")).toBe(true);
+    expect(registry.hasClientUid("shared-client-uid=")).toBe(true);
+    expect(registry.unregister(scope, 19, second, "shared-client-uid=")).toBe(true);
+    expect(registry.hasClientUid("shared-client-uid=")).toBe(false);
+  });
+
+  it("ignores missing or empty client UIDs", () => {
+    const registry = new ManagedVoiceClientRegistry();
+    registry.register(
+      { host: "203.0.113.4", voicePort: 9987 },
+      19,
+      Symbol("connection"),
+      "   ",
+    );
+
+    expect(registry.hasClientUid(undefined)).toBe(false);
+    expect(registry.hasClientUid("   ")).toBe(false);
+  });
+
+  it("uses an IPv6-safe scope key", () => {
+    const registry = new ManagedVoiceClientRegistry();
+    registry.register(
+      { host: "[2001:0db8:0:0:0:0:0:1]", voicePort: 9987 },
+      9,
+      Symbol("connection"),
+    );
+
+    expect(
+      registry.has({ host: "2001:db8::1", voicePort: 9987 }, 9),
+    ).toBe(true);
+  });
+
+  it("does not let a delayed old disconnect remove a replacement", () => {
+    const registry = new ManagedVoiceClientRegistry();
+    const scope = { host: "voice.example.com", voicePort: 9987 };
+    const oldConnection = Symbol("old connection");
+    const newConnection = Symbol("new connection");
+
+    registry.register(scope, 12, oldConnection, "managed-client-uid=");
+    registry.register(scope, 12, newConnection, "managed-client-uid=");
+
+    // The old UID owner is removed, but the replacement still owns both the
+    // scoped id and the shared stable UID.
+    expect(
+      registry.unregister(scope, 12, oldConnection, "managed-client-uid="),
+    ).toBe(true);
+    expect(registry.has(scope, 12)).toBe(true);
+    expect(registry.hasClientUid("managed-client-uid=")).toBe(true);
+    expect(
+      registry.unregister(scope, 12, newConnection, "managed-client-uid="),
+    ).toBe(true);
+    expect(registry.has(scope, 12)).toBe(false);
+    expect(registry.hasClientUid("managed-client-uid=")).toBe(false);
+  });
+
+  it.each([0, -1, 1.5, Number.NaN, Number.POSITIVE_INFINITY])(
+    "ignores invalid client id %s",
+    (clientId) => {
+      const registry = new ManagedVoiceClientRegistry();
+      const scope = { host: "voice.example.com", voicePort: 9987 };
+      const owner = Symbol("connection");
+
+      expect(registry.register(scope, clientId, owner)).toBe(false);
+      expect(registry.has(scope, clientId)).toBe(false);
+      expect(registry.unregister(scope, clientId, owner)).toBe(false);
+    },
+  );
+
+  it("has no shared module-level state between registry instances", () => {
+    const first = new ManagedVoiceClientRegistry();
+    const second = new ManagedVoiceClientRegistry();
+    const scope = { host: "voice.example.com", voicePort: 9987 };
+
+    first.register(scope, 3, Symbol("connection"));
+
+    expect(first.has(scope, 3)).toBe(true);
+    expect(second.has(scope, 3)).toBe(false);
+  });
+});
@@ -0,0 +1,187 @@
+import { isIP } from "node:net";
+
+/** Identifies one TeamSpeak voice server. */
+export interface ManagedVoiceClientScope {
+  host: string;
+  voicePort: number;
+}
+
+export interface NormalizedManagedVoiceClientScope {
+  readonly host: string;
+  readonly voicePort: number;
+}
+
+/**
+ * An opaque value identifying the connection that owns a client id.
+ *
+ * A fresh object or Symbol per connection is recommended. Value tokens are
+ * also supported for callers that already have a unique connection id.
+ */
+export type ManagedVoiceClientOwnerToken = object | string | number | symbol;
+
+/**
+ * Normalize a TeamSpeak host for comparisons.
+ *
+ * DNS names are case-insensitive and may include a trailing root dot. IPv6
+ * literals may be supplied either bare or in URL-style brackets; valid IPv6
+ * addresses are also put into the canonical form produced by the URL parser.
+ */
+export function normalizeManagedVoiceHost(host: string): string {
+  let normalized = host.trim().toLowerCase().replace(/\.+$/, "");
+
+  if (normalized.startsWith("[") && normalized.endsWith("]")) {
+    normalized = normalized.slice(1, -1);
+  }
+
+  if (isIP(normalized) === 6) {
+    // URL's host serializer compresses equivalent IPv6 spellings. `isIP`
+    // ensures interpolation cannot be interpreted as another URL component.
+    const serialized = new URL(`http://[${normalized}]/`).hostname;
+    return serialized.slice(1, -1);
+  }
+
+  return normalized;
+}
+
+/** Return a comparable scope, or null when the runtime input is unusable. */
+export function normalizeManagedVoiceClientScope(
+  scope: ManagedVoiceClientScope,
+): NormalizedManagedVoiceClientScope | null {
+  if (
+    !scope ||
+    typeof scope.host !== "string" ||
+    typeof scope.voicePort !== "number"
+  ) {
+    return null;
+  }
+
+  const host = normalizeManagedVoiceHost(scope.host);
+  if (
+    host.length === 0 ||
+    !Number.isInteger(scope.voicePort) ||
+    scope.voicePort < 1 ||
+    scope.voicePort > 65_535
+  ) {
+    return null;
+  }
+
+  return { host, voicePort: scope.voicePort };
+}
+
+function scopeKey(scope: ManagedVoiceClientScope): string | null {
+  const normalized = normalizeManagedVoiceClientScope(scope);
+  if (!normalized) return null;
+
+  // A serialized tuple stays unambiguous when host itself contains colons.
+  return JSON.stringify([normalized.host, normalized.voicePort]);
+}
+
+function validClientId(clientId: number): boolean {
+  return Number.isSafeInteger(clientId) && clientId > 0;
+}
+
+function normalizeClientUid(clientUid: string | undefined): string | null {
+  if (typeof clientUid !== "string") return null;
+  const normalized = clientUid.trim();
+  return normalized.length > 0 ? normalized : null;
+}
+
+/**
+ * Tracks voice client ids and stable TeamSpeak identities owned by bot
+ * connections in this process. The UID path survives DNS aliases, NAT,
+ * multiple NICs, and dual-stack endpoints; scoped ids remain a fallback when
+ * a sender has not yet appeared in the receiving client's view cache.
+ *
+ * This class intentionally has no module-level singleton. BotManager owns one
+ * instance and injects it into its BotInstances so separate managers remain
+ * isolated in tests and in the same process.
+ */
+export class ManagedVoiceClientRegistry {
+  private readonly clientsByScope = new Map<
+    string,
+    Map<number, ManagedVoiceClientOwnerToken>
+  >();
+  private readonly ownersByClientUid = new Map<
+    string,
+    Set<ManagedVoiceClientOwnerToken>
+  >();
+
+  /**
+   * Register (or replace) the connection that owns a client id and, when
+   * available, add its stable UID to the managed set.
+   * Returns false when the scope or client id is invalid.
+   */
+  register(
+    scope: ManagedVoiceClientScope,
+    clientId: number,
+    ownerToken: ManagedVoiceClientOwnerToken,
+    clientUid?: string,
+  ): boolean {
+    const key = scopeKey(scope);
+    if (!key || !validClientId(clientId)) return false;
+
+    let clients = this.clientsByScope.get(key);
+    if (!clients) {
+      clients = new Map();
+      this.clientsByScope.set(key, clients);
+    }
+    clients.set(clientId, ownerToken);
+
+    const normalizedUid = normalizeClientUid(clientUid);
+    if (normalizedUid) {
+      let owners = this.ownersByClientUid.get(normalizedUid);
+      if (!owners) {
+        owners = new Set();
+        this.ownersByClientUid.set(normalizedUid, owners);
+      }
+      owners.add(ownerToken);
+    }
+    return true;
+  }
+
+  /**
+   * Remove a client only if it is still owned by this connection.
+   *
+   * The ownership check prevents a delayed disconnect from an old connection
+   * deleting a newer connection that reused the same TeamSpeak client id.
+   */
+  unregister(
+    scope: ManagedVoiceClientScope,
+    clientId: number,
+    ownerToken: ManagedVoiceClientOwnerToken,
+    clientUid?: string,
+  ): boolean {
+    const key = scopeKey(scope);
+    if (!key || !validClientId(clientId)) return false;
+
+    let removed = false;
+    const clients = this.clientsByScope.get(key);
+    if (clients?.get(clientId) === ownerToken) {
+      clients.delete(clientId);
+      if (clients.size === 0) this.clientsByScope.delete(key);
+      removed = true;
+    }
+
+    const normalizedUid = normalizeClientUid(clientUid);
+    if (normalizedUid) {
+      const owners = this.ownersByClientUid.get(normalizedUid);
+      if (owners?.delete(ownerToken)) removed = true;
+      if (owners?.size === 0) this.ownersByClientUid.delete(normalizedUid);
+    }
+    return removed;
+  }
+
+  has(scope: ManagedVoiceClientScope, clientId: number): boolean {
+    const key = scopeKey(scope);
+    if (!key || !validClientId(clientId)) return false;
+    return this.clientsByScope.get(key)?.has(clientId) ?? false;
+  }
+
+  /** TeamSpeak client UIDs are stable across endpoint aliases and NAT paths. */
+  hasClientUid(clientUid: string | undefined): boolean {
+    const normalizedUid = normalizeClientUid(clientUid);
+    return normalizedUid
+      ? (this.ownersByClientUid.get(normalizedUid)?.size ?? 0) > 0
+      : false;
+  }
+}
@@ -15,6 +15,7 @@ import type { ServerProtocol } from "../ts-protocol/client.js";
 import type { AvatarStore } from "../data/avatars.js";
 import type { PermissionStore } from "../data/permissions.js";
 import type { SpotifyOAuth } from "../music/spotify/spotify-oauth.js";
+import { ManagedVoiceClientRegistry } from "./managed-voice-clients.js";

 /**
 * Run bot.connect() with a hard deadline. If the handshake hangs (e.g. the
@@ -72,6 +73,7 @@ export interface CreateBotParams {

 export class BotManager extends EventEmitter {
  private bots = new Map<string, BotInstance>();
+  private readonly managedVoiceClients = new ManagedVoiceClientRegistry();
  private neteaseProvider: MusicProvider;
  private qqProvider: MusicProvider;
  private bilibiliProvider: MusicProvider;
@@ -161,6 +163,7 @@ export class BotManager extends EventEmitter {
      config: this.config,
      logger: this.logger,
      avatarStore: this.avatarStore,
+      managedVoiceClients: this.managedVoiceClients,
      spotifyDataDir: this.spotifyDataDir,
      spotifyOAuth: this.spotifyOAuth,
    });
@@ -305,6 +308,7 @@ export class BotManager extends EventEmitter {
        config: this.config,
        logger: this.logger,
        avatarStore: this.avatarStore,
+        managedVoiceClients: this.managedVoiceClients,
        spotifyDataDir: this.spotifyDataDir,
        spotifyOAuth: this.spotifyOAuth,
      });
@@ -363,6 +367,7 @@ export class BotManager extends EventEmitter {
        config: this.config,
        logger: this.logger,
        avatarStore: this.avatarStore,
+        managedVoiceClients: this.managedVoiceClients,
        spotifyDataDir: this.spotifyDataDir,
        spotifyOAuth: this.spotifyOAuth,
      });
@@ -145,3 +145,60 @@ describe("BotProfileManager custom avatar precedence", () => {
    expect(ts.clearCalls).toBe(0);
  });
 });
+
+// #148: the persisted avatar is loaded in the BotInstance constructor, before
+// tsClient.connect() has run. Loading it must not touch the wire at all.
+describe("BotProfileManager loadCustomAvatar (pre-connect load, #148)", () => {
+  let ts: ReturnType<typeof makeMockTs>;
+  beforeEach(() => { ts = makeMockTs(); });
+
+  it("does not upload or clear anything when called before connect", async () => {
+    const pm = new BotProfileManager(ts as any, noopLogger, cfgOn, "Bot");
+    pm.loadCustomAvatar(Buffer.from([7, 7, 7]));
+    await flush();
+    expect(ts.uploadCalls.length).toBe(0);
+    expect(ts.clearCalls).toBe(0);
+    expect(ts.fileTransferInitUpload).not.toHaveBeenCalled();
+  });
+
+  it("the loaded avatar is uploaded once onConnect fires", async () => {
+    const pm = new BotProfileManager(ts as any, noopLogger, cfgOn, "Bot");
+    pm.loadCustomAvatar(Buffer.from([7, 7, 7]));
+    await flush();
+    pm.onConnect();
+    await flush();
+    expect(ts.uploadCalls.length).toBe(1);
+    expect(ts.uploadCalls[0].equals(Buffer.from([7, 7, 7]))).toBe(true);
+  });
+
+  it("survives a reconnect: onConnect re-applies the loaded avatar every time", async () => {
+    const pm = new BotProfileManager(ts as any, noopLogger, cfgOn, "Bot");
+    pm.loadCustomAvatar(Buffer.from([8]));
+    pm.onConnect();
+    await flush();
+    pm.onConnect();
+    await flush();
+    expect(ts.uploadCalls.length).toBe(2);
+  });
+
+  it("loading null leaves the wire untouched and onConnect stays quiet", async () => {
+    const pm = new BotProfileManager(ts as any, noopLogger, cfgOn, "Bot");
+    pm.loadCustomAvatar(null);
+    pm.onConnect();
+    await flush();
+    expect(ts.uploadCalls.length).toBe(0);
+    expect(ts.clearCalls).toBe(0);
+  });
+
+  it("setCustomAvatar still uploads immediately after connect (post-connect edit unchanged)", async () => {
+    const pm = new BotProfileManager(ts as any, noopLogger, cfgOn, "Bot");
+    pm.loadCustomAvatar(Buffer.from([1]));
+    pm.onConnect();
+    await flush();
+    ts.uploadCalls.length = 0;
+    pm.setCustomAvatar(Buffer.from([2, 2]));
+    await flush();
+    expect(ts.uploadCalls.length).toBe(1);
+    expect(ts.uploadCalls[0].equals(Buffer.from([2, 2]))).toBe(true);
+  });
+});
@@ -65,6 +65,20 @@ export class BotProfileManager {

  // --- Public API ---

+  /**
+   * Store a persisted custom avatar WITHOUT touching TeamSpeak (#148).
+   *
+   * Used during BotInstance construction, when the TS connection does not
+   * exist yet: setCustomAvatar would immediately fire the three-step file
+   * transfer (fileTransferInitUpload → uploadFileData → clientupdate) against
+   * a client that has not connected, so the upload always failed and the
+   * saved avatar never appeared. onConnect() re-applies this.customAvatar
+   * once the handshake completes, so loading it silently here loses nothing.
+   */
+  loadCustomAvatar(buffer: Buffer | null): void {
+    this.customAvatar = buffer;
+  }
+
  /**
   * Set/clear the persistent idle avatar. Pass null to remove.
   *
@@ -1,5 +1,5 @@
 import { describe, it, expect } from "vitest";
-import { parseSongRef, parseSelectionIndex } from "./song-ref.js";
+import { parseSongRef, parseSelectionIndex, parsePlaylistRef, findShareShortLink, resolveShareLink } from "./song-ref.js";

 describe("parseSongRef (#90 exact-song selection)", () => {
  it("returns null for a plain search term", () => {
@@ -21,6 +21,59 @@ describe("parseSongRef (#90 exact-song selection)", () => {
    expect(parseSongRef("id:185868,")).toEqual({ id: "185868", platform: null });
  });

+  // Issue #139: `!play id <id>` matches the "<command> <subcommand> <arg>"
+  // shape of every other command. The colon form stays supported — users have
+  // it in their chat scrollback and in older docs.
+  it("parses the space-separated id form", () => {
+    expect(parseSongRef("id 185868")).toEqual({ id: "185868", platform: null });
+    expect(parseSongRef("ID 004Z8Ihr0JIu5s")).toEqual({ id: "004Z8Ihr0JIu5s", platform: null });
+    expect(parseSongRef("id   185868")).toEqual({ id: "185868", platform: null });
+    expect(parseSongRef("id 185868.")).toEqual({ id: "185868", platform: null });
+  });
+
+  it("does not mistake a word merely starting with 'id' for an id reference", () => {
+    expect(parseSongRef("idol")).toBeNull();
+    expect(parseSongRef("identity 185868")).toBeNull();
+    expect(parseSongRef("id")).toBeNull();
+    expect(parseSongRef("id:")).toBeNull();
+    // Two remaining tokens are a search phrase, not an id.
+    expect(parseSongRef("id die for you")).toBeNull();
+  });
+
+  // Without a colon, "id" is just a word — "ID 4" and "ID Bruno" are real track
+  // titles. The space form therefore only claims tokens that could actually be
+  // an id; everything else stays a search term.
+  it("only treats the space form as an id when the token looks like one", () => {
+    expect(parseSongRef("id Bruno")).toBeNull();
+    expect(parseSongRef("id Marshmello")).toBeNull();
+    expect(parseSongRef("id 4ever")).toBeNull();
+    // …while every real id shape is still accepted.
+    expect(parseSongRef("id 4")).toEqual({ id: "4", platform: null });          // numeric
+    expect(parseSongRef("id BV1yxHQeYEuE")).toEqual({ id: "BV1yxHQeYEuE", platform: null });
+    expect(parseSongRef("id 004Z8Ihr0JIu5s")).toEqual({ id: "004Z8Ihr0JIu5s", platform: null }); // QQ mid
+    expect(parseSongRef("id a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6")).toEqual({
+      id: "a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6",
+      platform: null,
+    }); // Jellyfin GUID / Kugou hash
+  });
+
+  it("keeps the colon form unrestricted, so a short or odd id still works", () => {
+    expect(parseSongRef("id:Bruno")).toEqual({ id: "Bruno", platform: null });
+    expect(parseSongRef("id: 4ever")).toEqual({ id: "4ever", platform: null });
+  });
+
+  it("does not let the space form swallow a pasted URL", () => {
+    // `id <url>` used to fall through to the URL branches; it still must.
+    expect(parseSongRef("id https://music.163.com/song?id=185868")).toEqual({
+      id: "185868",
+      platform: "netease",
+    });
+    expect(parseSongRef("id https://y.qq.com/n/ryqq/songDetail/004Z8Ihr0JIu5s")).toEqual({
+      id: "004Z8Ihr0JIu5s",
+      platform: "qq",
+    });
+  });
+
  it("does NOT treat NetEase collection (playlist/album/artist) URLs as a song id", () => {
    // These reuse ?id= but are not songs — they should fall through to search,
    // not misresolve to getSongDetail(collectionId) and error "no song".
@@ -67,3 +120,65 @@ describe("parseSelectionIndex (#90 pick from last search)", () => {
    expect(parseSelectionIndex("")).toBeNull();
  });
 });
+
+describe("parsePlaylistRef (#160 play a playlist from its link)", () => {
+  it("returns null for a playlist name or a bare id (caller keeps its old logic)", () => {
+    expect(parsePlaylistRef("华语经典")).toBeNull();
+    expect(parsePlaylistRef("2829883282")).toBeNull();
+    expect(parsePlaylistRef("")).toBeNull();
+  });
+
+  it("parses NetEase playlist URLs (web, hash route, mobile share)", () => {
+    expect(parsePlaylistRef("https://music.163.com/playlist?id=2829883282")).toEqual({ id: "2829883282", platform: "netease" });
+    expect(parsePlaylistRef("https://music.163.com/#/playlist?id=2829883282")).toEqual({ id: "2829883282", platform: "netease" });
+    expect(parsePlaylistRef("https://y.music.163.com/m/playlist?id=2829883282&userid=77&creatorId=77")).toEqual({ id: "2829883282", platform: "netease" });
+    expect(parsePlaylistRef("https://music.163.com/playlist/2829883282")).toEqual({ id: "2829883282", platform: "netease" });
+  });
+
+  it("does not mistake a NetEase userid= for the playlist id", () => {
+    expect(parsePlaylistRef("https://music.163.com/playlist?userid=77&id=123")).toEqual({ id: "123", platform: "netease" });
+  });
+
+  it("parses QQ Music playlist URLs", () => {
+    expect(parsePlaylistRef("https://y.qq.com/n/ryqq/playlist/8052190267")).toEqual({ id: "8052190267", platform: "qq" });
+    expect(parsePlaylistRef("https://i.y.qq.com/n2/m/share/details/taoge.html?platform=11&appshare=android_qq&hosteuin=abc&id=8052190267&appversion=13")).toEqual({ id: "8052190267", platform: "qq" });
+  });
+
+  it("parses YouTube playlist URLs by their list= id", () => {
+    expect(parsePlaylistRef("https://www.youtube.com/playlist?list=PLx0sYbCqOb8TBPRdmBHs5Iftvv9TPboYG")).toEqual({ id: "PLx0sYbCqOb8TBPRdmBHs5Iftvv9TPboYG", platform: "youtube" });
+    expect(parsePlaylistRef("https://youtu.be/abc?list=PLabc-_1")).toEqual({ id: "PLabc-_1", platform: "youtube" });
+  });
+
+  it("unwraps the [URL] BBCode the TeamSpeak client adds to pasted links", () => {
+    expect(parsePlaylistRef("[URL]https://y.qq.com/n/ryqq/playlist/8052190267[/URL]")).toEqual({ id: "8052190267", platform: "qq" });
+  });
+
+  it("finds the link inside an app's share text", () => {
+    expect(parsePlaylistRef("分享某人创建的歌单「深夜」: https://y.music.163.com/m/playlist?id=123&userid=77 (来自@网易云音乐)")).toEqual({ id: "123", platform: "netease" });
+  });
+});
+
+describe("findShareShortLink (#160)", () => {
+  it("finds NetEase and QQ app short links, even inside share text or BBCode", () => {
+    expect(findShareShortLink("歌单「深夜」: https://163cn.tv/Abc123 (来自@网易云音乐)")).toBe("https://163cn.tv/Abc123");
+    expect(findShareShortLink("[URL]https://c6.y.qq.com/base/fcgi-bin/u?__=AbCd12[/URL]")).toBe("https://c6.y.qq.com/base/fcgi-bin/u?__=AbCd12");
+  });
+
+  it("ignores every other host, so we never fetch arbitrary user-supplied URLs", () => {
+    expect(findShareShortLink("https://evil.example/163cn.tv/Abc")).toBeNull();
+    expect(findShareShortLink("http://127.0.0.1:8080/x")).toBeNull();
+    expect(findShareShortLink("华语经典")).toBeNull();
+  });
+});
+
+describe("resolveShareLink (#160)", () => {
+  it("returns the redirect target", async () => {
+    const get = async () => ({ status: 302, location: "https://music.163.com/playlist?id=123" });
+    expect(await resolveShareLink("https://163cn.tv/Abc", get)).toBe("https://music.163.com/playlist?id=123");
+  });
+
+  it("returns null when there is no redirect or the request fails", async () => {
+    expect(await resolveShareLink("https://163cn.tv/Abc", async () => ({ status: 200, location: undefined }))).toBeNull();
+    expect(await resolveShareLink("https://163cn.tv/Abc", async () => { throw new Error("boom"); })).toBeNull();
+  });
+});
@@ -1,3 +1,5 @@
+import axios from "axios";
+
 /**
 * Parsing helpers for picking an EXACT song in a !play / !add / !playnext query,
 * so same-name songs can be disambiguated instead of always getting the single
@@ -18,9 +20,22 @@ export interface SongRef {
  platform: "netease" | "qq" | "bilibili" | null;
 }

+/**
+ * Could this token plausibly BE an id on a supported platform?
+ *   - NetEase / Kugou numeric ids      → all digits
+ *   - BiliBili                         → BV + 8-12 alphanumerics
+ *   - QQ mid (14), YouTube (11), Spotify (22), Jellyfin GUID / Kugou hash (32)
+ *                                      → 11+ chars from the id alphabet
+ * Deliberately conservative: anything rejected here just stays an ordinary
+ * search term, which is what it almost certainly was.
+ */
+function looksLikeSongId(token: string): boolean {
+  return /^(?:\d+|BV[0-9A-Za-z]{8,12}|[0-9A-Za-z_-]{11,})$/i.test(token);
+}
+
 /**
 * Detect an explicit song reference in a query. Recognizes:
- *   - `id:<id>`                         → platform from flags/default
+ *   - `id <id>` / `id:<id>`             → platform from flags/default
 *   - NetEase song URL                  → music.163.com/song?id=N (also /#/song?id=N, /song/N)
 *   - QQ song URL                       → y.qq.com/.../songDetail/MID (or ?songmid=MID)
 *   - BiliBili BVID (bare or in a URL)  → bilibili.com/video/BVxxxx, b23.tv, or BVxxxx
@@ -30,11 +45,25 @@ export function parseSongRef(raw: string): SongRef | null {
  const q = (raw ?? "").trim();
  if (!q) return null;

-  // Explicit "id:<id>" — platform decided by the command's flags/default.
-  // Strip trailing punctuation that tags along from a chat paste ("id:12345."
-  // / "id:12345)") — no supported id (numeric / BVID / mid) ends in those.
-  const idPrefix = /^id:\s*(\S+)$/i.exec(q);
-  if (idPrefix) return { id: idPrefix[1].replace(/[.,;)\]]+$/, ""), platform: null };
+  // Explicit id — platform decided by the command's flags/default. The
+  // separator is a colon or plain whitespace, so `id <id>` matches the
+  // `!<cmd> <sub> <arg>` shape of every other command (issue #139) while the
+  // older `id:<id>` keeps working. Strip trailing punctuation that tags along
+  // from a chat paste ("id:12345." / "id:12345)") — no supported id
+  // (numeric / BVID / mid) ends in those.
+  //
+  // The colon is an unambiguous sigil, so `id:<anything>` is always an id. A
+  // space is not: "ID 4" and "ID Bruno" are real track titles, and `id <url>`
+  // has to keep resolving as a URL. So the space form only claims tokens that
+  // could actually be an id; anything else falls through to the URL branches
+  // below and ultimately to a plain search.
+  const idPrefix = /^id(:\s*|\s+)(\S+)$/i.exec(q);
+  if (idPrefix) {
+    const id = idPrefix[2].replace(/[.,;)\]]+$/, "");
+    if (idPrefix[1].startsWith(":") || looksLikeSongId(id)) {
+      return { id, platform: null };
+    }
+  }

  // BiliBili BV id, bare or inside a bilibili URL (NetEase ids are numeric, so
  // a "BV..." token never collides with them).
@@ -71,3 +100,82 @@ export function parseSelectionIndex(raw: string): number | null {
  const n = parseInt(m[1], 10);
  return Number.isFinite(n) && n > 0 ? n : null;
 }
+
+export interface PlaylistRef {
+  id: string;
+  platform: "netease" | "qq" | "youtube";
+}
+
+/** Drop the [URL]…[/URL] BBCode the TeamSpeak client wraps around pasted links. */
+function stripUrlBBCode(text: string): string {
+  return text.replace(/\[\/?url(?:=[^\]]*)?\]/gi, " ");
+}
+
+/**
+ * Detect a playlist URL (#160) — a web link, or the full link inside an app's
+ * share text. The platform comes from the URL, so a QQ link works without
+ * `-q`. Returns `null` for anything else (a playlist name or bare id), which
+ * the caller handles as before.
+ */
+export function parsePlaylistRef(raw: string): PlaylistRef | null {
+  const q = stripUrlBBCode(raw ?? "").trim();
+  if (!q) return null;
+
+  if (/music\.163\.com/i.test(q)) {
+    const m = /[?&#/]id=(\d+)/.exec(q) ?? /\/playlist\/(\d+)/.exec(q);
+    if (m) return { id: m[1], platform: "netease" };
+  }
+
+  if (/y\.qq\.com/i.test(q)) {
+    const m = /\/playlist\/(\d+)/.exec(q) ?? /[?&](?:id|disstid)=(\d+)/.exec(q);
+    if (m) return { id: m[1], platform: "qq" };
+  }
+
+  if (/youtube\.com|youtu\.be/i.test(q)) {
+    const m = /[?&]list=([\w-]+)/.exec(q);
+    if (m) return { id: m[1], platform: "youtube" };
+  }
+
+  return null;
+}
+
+/**
+ * Find a NetEase (163cn.tv) or QQ Music (c6.y.qq.com/base/fcgi-bin/u) share
+ * short link — what the phone apps copy. Only these hosts are recognized so
+ * the bot never fetches an arbitrary user-supplied URL.
+ */
+export function findShareShortLink(raw: string): string | null {
+  const q = stripUrlBBCode(raw ?? "");
+  const m =
+    /https?:\/\/163cn\.(?:tv|link)\/[0-9A-Za-z]+/i.exec(q) ??
+    /https?:\/\/c\d*\.y\.qq\.com\/base\/fcgi-bin\/u\?__=[0-9A-Za-z]+/i.exec(q);
+  return m ? m[0] : null;
+}
+
+type RedirectGet = (url: string) => Promise<{ status: number; location: string | undefined }>;
+
+const redirectGet: RedirectGet = async (url) => {
+  const res = await axios.get(url, {
+    maxRedirects: 0,
+    timeout: 5000,
+    validateStatus: () => true,
+    responseType: "stream",
+  });
+  res.data?.destroy?.();
+  const location = res.headers.location;
+  return { status: res.status, location: typeof location === "string" ? location : undefined };
+};
+
+/** Follow a share short link one hop. Returns the target URL, or null. */
+export async function resolveShareLink(
+  url: string,
+  get: RedirectGet = redirectGet,
+): Promise<string | null> {
+  try {
+    const { status, location } = await get(url);
+    if (status < 300 || status >= 400 || !location) return null;
+    return new URL(location, url).toString();
+  } catch {
+    return null;
+  }
+}
@@ -0,0 +1,152 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { VoiceDuckingController } from "./voice-ducking.js";
+
+function makeHarness(
+  enabled = true,
+  volumePercent = 30,
+  timing = { attackMs: 50, holdMs: 100, releaseMs: 200 },
+) {
+  let now = 0;
+  const setDuckingGain = vi.fn<(gain: number, rampMs?: number) => void>();
+  const controller = new VoiceDuckingController(
+    { setDuckingGain },
+    { enabled, volumePercent },
+    { timing, now: () => now },
+  );
+
+  const advance = (milliseconds: number) => {
+    now += milliseconds;
+    vi.advanceTimersByTime(milliseconds);
+  };
+
+  return { controller, setDuckingGain, advance };
+}
+
+describe("VoiceDuckingController", () => {
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("is inert while disabled", () => {
+    vi.useFakeTimers();
+    const { controller, setDuckingGain, advance } = makeHarness(false);
+
+    controller.handleVoiceActivity(12);
+    advance(1_000);
+
+    expect(setDuckingGain).not.toHaveBeenCalled();
+    expect(controller.isDucking()).toBe(false);
+    expect(controller.activeSpeakerCount()).toBe(0);
+  });
+
+  it("attacks once, refreshes the packet deadline, then releases", () => {
+    vi.useFakeTimers();
+    const { controller, setDuckingGain, advance } = makeHarness();
+
+    controller.handleVoiceActivity(12);
+    expect(setDuckingGain).toHaveBeenCalledWith(0.3, 50);
+
+    advance(60);
+    controller.handleVoiceActivity(12);
+    expect(setDuckingGain).toHaveBeenCalledTimes(1);
+
+    // The original t=100 sweep observes the refreshed t=160 deadline.
+    advance(40);
+    expect(controller.isDucking()).toBe(true);
+    expect(setDuckingGain).toHaveBeenCalledTimes(1);
+
+    advance(60);
+    expect(controller.isDucking()).toBe(false);
+    expect(setDuckingGain).toHaveBeenLastCalledWith(1, 200);
+  });
+
+  it("stays ducked until the last overlapping speaker expires", () => {
+    vi.useFakeTimers();
+    const { controller, setDuckingGain, advance } = makeHarness();
+
+    controller.handleVoiceActivity(1);
+    advance(50);
+    controller.handleVoiceActivity(2);
+    advance(50);
+
+    expect(controller.activeSpeakerCount()).toBe(1);
+    expect(controller.isDucking()).toBe(true);
+    expect(setDuckingGain).toHaveBeenCalledTimes(1);
+
+    advance(50);
+    expect(controller.activeSpeakerCount()).toBe(0);
+    expect(setDuckingGain).toHaveBeenLastCalledWith(1, 200);
+  });
+
+  it("removes a client immediately on leave without disturbing other speakers", () => {
+    vi.useFakeTimers();
+    const { controller, setDuckingGain } = makeHarness();
+
+    controller.handleVoiceActivity(1);
+    controller.handleVoiceActivity(2);
+    controller.removeSpeaker(1);
+    expect(controller.isDucking()).toBe(true);
+    expect(controller.activeSpeakerCount()).toBe(1);
+
+    controller.removeSpeaker(2);
+    expect(controller.isDucking()).toBe(false);
+    expect(setDuckingGain).toHaveBeenLastCalledWith(1, 200);
+  });
+
+  it("retargets a live duck and smoothly restores when disabled", () => {
+    vi.useFakeTimers();
+    const { controller, setDuckingGain } = makeHarness();
+
+    controller.handleVoiceActivity(7);
+    controller.updateSettings({ enabled: true, volumePercent: 45 });
+    expect(setDuckingGain).toHaveBeenLastCalledWith(0.45, 50);
+
+    controller.updateSettings({ enabled: false, volumePercent: 45 });
+    expect(controller.isDucking()).toBe(false);
+    expect(controller.activeSpeakerCount()).toBe(0);
+    expect(setDuckingGain).toHaveBeenLastCalledWith(1, 200);
+  });
+
+  it("attacks again when speech resumes during the release window", () => {
+    vi.useFakeTimers();
+    const { controller, setDuckingGain, advance } = makeHarness();
+
+    controller.handleVoiceActivity(7);
+    advance(100);
+    expect(setDuckingGain).toHaveBeenLastCalledWith(1, 200);
+
+    advance(50);
+    controller.handleVoiceActivity(7);
+    expect(controller.isDucking()).toBe(true);
+    expect(setDuckingGain).toHaveBeenLastCalledWith(0.3, 50);
+  });
+
+  it("invalidates an old expiry callback after reset", () => {
+    vi.useFakeTimers();
+    const { controller, setDuckingGain, advance } = makeHarness();
+
+    controller.handleVoiceActivity(8);
+    controller.reset(true);
+    const callsAfterReset = setDuckingGain.mock.calls.length;
+    advance(1_000);
+
+    expect(setDuckingGain).toHaveBeenCalledTimes(callsAfterReset);
+    expect(setDuckingGain).toHaveBeenLastCalledWith(1, 0);
+  });
+
+  it("rejects invalid client ids and supports an immediate lifecycle reset", () => {
+    vi.useFakeTimers();
+    const { controller, setDuckingGain } = makeHarness();
+
+    for (const id of [0, -1, 1.5, Number.NaN]) {
+      controller.handleVoiceActivity(id);
+    }
+    expect(setDuckingGain).not.toHaveBeenCalled();
+
+    controller.handleVoiceActivity(8);
+    controller.reset(true);
+    expect(controller.isDucking()).toBe(false);
+    expect(controller.activeSpeakerCount()).toBe(0);
+    expect(setDuckingGain).toHaveBeenLastCalledWith(1, 0);
+  });
+});
@@ -0,0 +1,183 @@
+export interface VoiceDuckingSettings {
+  enabled: boolean;
+  volumePercent: number;
+}
+
+export interface VoiceDuckingGainTarget {
+  setDuckingGain(gain: number, rampMs?: number): void;
+}
+
+export interface VoiceDuckingTiming {
+  attackMs: number;
+  holdMs: number;
+  releaseMs: number;
+}
+
+export const DEFAULT_VOICE_DUCKING_TIMING: Readonly<VoiceDuckingTiming> = {
+  attackMs: 50,
+  holdMs: 700,
+  releaseMs: 500,
+};
+
+interface VoiceDuckingControllerOptions {
+  timing?: Partial<VoiceDuckingTiming>;
+  now?: () => number;
+}
+
+function nonNegativeFinite(value: number | undefined, fallback: number): number {
+  return typeof value === "number" && Number.isFinite(value)
+    ? Math.max(0, value)
+    : fallback;
+}
+
+function normalizeSettings(settings: VoiceDuckingSettings): VoiceDuckingSettings {
+  return {
+    enabled: settings.enabled === true,
+    volumePercent:
+      typeof settings.volumePercent === "number" && Number.isFinite(settings.volumePercent)
+        ? Math.max(0, Math.min(100, settings.volumePercent))
+        : 30,
+  };
+}
+
+/**
+ * Converts the stream of incoming TeamSpeak voice packets into a stable
+ * ducking envelope. TeamSpeak's full-client protocol exposes voice packets,
+ * but not an explicit "stopped talking" event, so a speaker remains active
+ * for a short hold period after their most recent packet.
+ *
+ * Only one timeout is live at a time. Repeated ~20 ms voice packets update a
+ * deadline in the map instead of constantly destroying/recreating timers.
+ */
+export class VoiceDuckingController {
+  private settings: VoiceDuckingSettings;
+  private readonly timing: VoiceDuckingTiming;
+  private readonly now: () => number;
+  private readonly activeUntil = new Map<number, number>();
+  private expiryTimer: ReturnType<typeof setTimeout> | null = null;
+  private timerDueAt = Number.POSITIVE_INFINITY;
+  private timerGeneration = 0;
+  private ducking = false;
+
+  constructor(
+    private readonly target: VoiceDuckingGainTarget,
+    initialSettings: VoiceDuckingSettings,
+    options: VoiceDuckingControllerOptions = {},
+  ) {
+    this.settings = normalizeSettings(initialSettings);
+    this.timing = {
+      attackMs: nonNegativeFinite(options.timing?.attackMs, DEFAULT_VOICE_DUCKING_TIMING.attackMs),
+      holdMs: nonNegativeFinite(options.timing?.holdMs, DEFAULT_VOICE_DUCKING_TIMING.holdMs),
+      releaseMs: nonNegativeFinite(options.timing?.releaseMs, DEFAULT_VOICE_DUCKING_TIMING.releaseMs),
+    };
+    this.now = options.now ?? (() => performance.now());
+  }
+
+  handleVoiceActivity(clientId: number): void {
+    if (!this.settings.enabled || !Number.isInteger(clientId) || clientId <= 0) return;
+
+    const now = this.now();
+    this.activeUntil.set(clientId, now + this.timing.holdMs);
+
+    if (!this.ducking) {
+      this.ducking = true;
+      this.target.setDuckingGain(this.settings.volumePercent / 100, this.timing.attackMs);
+    }
+
+    this.scheduleNextSweep(now);
+  }
+
+  removeSpeaker(clientId: number): void {
+    if (!this.activeUntil.delete(clientId)) return;
+    if (this.activeUntil.size === 0) {
+      this.cancelTimer();
+      this.release();
+    }
+  }
+
+  updateSettings(settings: VoiceDuckingSettings): void {
+    const previous = this.settings;
+    this.settings = normalizeSettings(settings);
+
+    if (!this.settings.enabled) {
+      this.activeUntil.clear();
+      this.cancelTimer();
+      this.release();
+      return;
+    }
+
+    if (
+      previous.volumePercent !== this.settings.volumePercent &&
+      this.ducking
+    ) {
+      this.target.setDuckingGain(this.settings.volumePercent / 100, this.timing.attackMs);
+    }
+  }
+
+  /** Clear all activity. Disconnects use an immediate reset; disabling the
+   * feature uses updateSettings(), which returns smoothly over releaseMs. */
+  reset(immediate = true): void {
+    this.activeUntil.clear();
+    this.cancelTimer();
+    this.ducking = false;
+    this.target.setDuckingGain(1, immediate ? 0 : this.timing.releaseMs);
+  }
+
+  isDucking(): boolean {
+    return this.ducking;
+  }
+
+  activeSpeakerCount(): number {
+    return this.activeUntil.size;
+  }
+
+  private scheduleNextSweep(now = this.now()): void {
+    if (this.activeUntil.size === 0) return;
+
+    let nextDueAt = Number.POSITIVE_INFINITY;
+    for (const deadline of this.activeUntil.values()) {
+      if (deadline < nextDueAt) nextDueAt = deadline;
+    }
+
+    // Keeping an earlier timer is intentional. When it fires it will observe
+    // the refreshed deadline and schedule the remaining delay, avoiding timer
+    // churn on every incoming packet.
+    if (this.expiryTimer && this.timerDueAt <= nextDueAt) return;
+
+    this.cancelTimer();
+    const generation = ++this.timerGeneration;
+    this.timerDueAt = nextDueAt;
+    this.expiryTimer = setTimeout(() => {
+      if (generation !== this.timerGeneration) return;
+      this.expiryTimer = null;
+      this.timerDueAt = Number.POSITIVE_INFINITY;
+      this.sweepExpiredSpeakers();
+    }, Math.max(0, nextDueAt - now));
+  }
+
+  private sweepExpiredSpeakers(): void {
+    const now = this.now();
+    for (const [clientId, deadline] of this.activeUntil) {
+      if (deadline <= now) this.activeUntil.delete(clientId);
+    }
+
+    if (this.activeUntil.size > 0) {
+      this.scheduleNextSweep(now);
+    } else {
+      this.release();
+    }
+  }
+
+  private release(): void {
+    if (!this.ducking) return;
+    this.ducking = false;
+    this.target.setDuckingGain(1, this.timing.releaseMs);
+  }
+
+  private cancelTimer(): void {
+    this.timerGeneration++;
+    if (this.expiryTimer) clearTimeout(this.expiryTimer);
+    this.expiryTimer = null;
+    this.timerDueAt = Number.POSITIVE_INFINITY;
+  }
+}
@@ -48,6 +48,79 @@ describe("config", () => {
    expect(config).toEqual(getDefaultConfig());
  });

+  it("defaults voice ducking to disabled at 30 percent", () => {
+    expect(getDefaultConfig().voiceDucking).toEqual({
+      enabled: false,
+      volumePercent: 30,
+    });
+  });
+
+  it("fills voiceDucking defaults for legacy and partial configs", () => {
+    const dir = makeTmpDir();
+    const legacyPath = join(dir, "legacy.json");
+    writeFileSync(legacyPath, JSON.stringify({ webPort: 4000 }));
+    expect(loadConfig(legacyPath).voiceDucking).toEqual({
+      enabled: false,
+      volumePercent: 30,
+    });
+
+    const partialPath = join(dir, "partial.json");
+    writeFileSync(partialPath, JSON.stringify({ voiceDucking: { enabled: true } }));
+    expect(loadConfig(partialPath).voiceDucking).toEqual({
+      enabled: true,
+      volumePercent: 30,
+    });
+  });
+
+  it("loadConfig preserves valid voiceDucking values including range endpoints", () => {
+    const dir = makeTmpDir();
+    for (const volumePercent of [0, 37.5, 100]) {
+      const path = join(dir, `voice-ducking-${volumePercent}.json`);
+      writeFileSync(
+        path,
+        JSON.stringify({ voiceDucking: { enabled: true, volumePercent } }),
+      );
+      expect(loadConfig(path).voiceDucking).toEqual({ enabled: true, volumePercent });
+    }
+  });
+
+  it("loadConfig strictly sanitizes malformed voiceDucking values", () => {
+    const dir = makeTmpDir();
+    const malformed: Array<{ name: string; json: string }> = [
+      { name: "null-block", json: JSON.stringify({ voiceDucking: null }) },
+      { name: "array-block", json: JSON.stringify({ voiceDucking: [true, 10] }) },
+      { name: "string-block", json: JSON.stringify({ voiceDucking: "on" }) },
+      {
+        name: "wrong-types",
+        json: JSON.stringify({ voiceDucking: { enabled: "yes", volumePercent: "25" } }),
+      },
+      {
+        name: "below-range",
+        json: JSON.stringify({ voiceDucking: { enabled: true, volumePercent: -1 } }),
+      },
+      {
+        name: "above-range",
+        json: JSON.stringify({ voiceDucking: { enabled: true, volumePercent: 101 } }),
+      },
+      // JSON.parse("1e309") produces Infinity, exercising the finite-number guard.
+      {
+        name: "non-finite",
+        json: '{"voiceDucking":{"enabled":true,"volumePercent":1e309}}',
+      },
+    ];
+
+    for (const testCase of malformed) {
+      const path = join(dir, `${testCase.name}.json`);
+      writeFileSync(path, testCase.json);
+      const loaded = loadConfig(path).voiceDucking;
+      if (testCase.name === "below-range" || testCase.name === "above-range" || testCase.name === "non-finite") {
+        expect(loaded).toEqual({ enabled: true, volumePercent: 30 });
+      } else {
+        expect(loaded).toEqual({ enabled: false, volumePercent: 30 });
+      }
+    }
+  });
+
  it("defaults to the online sources with jellyfin as opt-in (disabled)", () => {
    const config = getDefaultConfig();
    expect(config.enabledProviders).toEqual(["netease", "qq", "bilibili", "youtube", "kugou"]);
@@ -82,6 +155,61 @@ describe("config", () => {
    expect(defaultPlatform(config)).toBe("netease");
  });

+  // --- #126: an explicit operator default source ---
+
+  it("defaultPlatform is null by default (follow the priority order)", () => {
+    expect(getDefaultConfig().defaultPlatform).toBeNull();
+  });
+
+  it("defaultPlatform() honors an explicit, enabled preference over the priority order", () => {
+    const config = getDefaultConfig();
+    // Priority would pick netease; a Bilibili-loving server sets B站 instead (#126).
+    config.defaultPlatform = "bilibili";
+    expect(defaultPlatform(config)).toBe("bilibili");
+  });
+
+  it("defaultPlatform() ignores a preference whose source is not enabled", () => {
+    const config = getDefaultConfig();
+    config.defaultPlatform = "jellyfin"; // opt-in, not enabled in the default config
+    // Falls back to the fixed priority order (netease)…
+    expect(defaultPlatform(config)).toBe("netease");
+    // …until the preferred source is actually enabled.
+    config.enabledProviders = [...config.enabledProviders, "jellyfin"];
+    expect(defaultPlatform(config)).toBe("jellyfin");
+  });
+
+  it("loadConfig keeps a valid, enabled defaultPlatform", () => {
+    const dir = makeTmpDir();
+    const path = join(dir, "config.json");
+    writeFileSync(path, JSON.stringify({ defaultPlatform: "bilibili" }));
+    const config = loadConfig(path);
+    expect(config.defaultPlatform).toBe("bilibili");
+    expect(defaultPlatform(config)).toBe("bilibili");
+  });
+
+  it("loadConfig nulls a defaultPlatform that is unknown, disabled, or the wrong type", () => {
+    const dir = makeTmpDir();
+    // Unknown provider name.
+    const p1 = join(dir, "c1.json");
+    writeFileSync(p1, JSON.stringify({ defaultPlatform: "bogus" }));
+    expect(loadConfig(p1).defaultPlatform).toBeNull();
+    // Known provider, but not in enabledProviders.
+    const p2 = join(dir, "c2.json");
+    writeFileSync(p2, JSON.stringify({ enabledProviders: ["netease"], defaultPlatform: "bilibili" }));
+    expect(loadConfig(p2).defaultPlatform).toBeNull();
+    // Wrong type.
+    const p3 = join(dir, "c3.json");
+    writeFileSync(p3, JSON.stringify({ defaultPlatform: 42 }));
+    expect(loadConfig(p3).defaultPlatform).toBeNull();
+  });
+
+  it("round-trips defaultPlatform through save/load", () => {
+    const dir = makeTmpDir();
+    const path = join(dir, "config.json");
+    saveConfig(path, { ...getDefaultConfig(), defaultPlatform: "qq" });
+    expect(loadConfig(path).defaultPlatform).toBe("qq");
+  });
+
  it("respects an explicit jellyfin-only enabledProviders from disk", () => {
    const dir = makeTmpDir();
    const path = join(dir, "config.json");
@@ -92,6 +220,60 @@ describe("config", () => {
    expect(defaultPlatform(config)).toBe("jellyfin");
  });

+  // ── audioQuality persistence (#125) ─────────────────────────────────────
+  it("defaults audioQuality to each provider's in-memory default", () => {
+    const config = getDefaultConfig();
+    expect(config.audioQuality).toEqual({
+      netease: "exhigh",
+      qq: "exhigh",
+      bilibili: "high",
+      kugou: "128",
+      jellyfin: "direct",
+    });
+  });
+
+  it("fills audioQuality defaults for a legacy config without the field", () => {
+    const dir = makeTmpDir();
+    const path = join(dir, "config.json");
+    writeFileSync(path, JSON.stringify({ webPort: 4000 }));
+    const config = loadConfig(path);
+    expect(config.audioQuality).toEqual(getDefaultConfig().audioQuality);
+  });
+
+  it("round-trips a saved audioQuality through save/load", () => {
+    const dir = makeTmpDir();
+    const path = join(dir, "config.json");
+    const config = getDefaultConfig();
+    config.audioQuality = {
+      netease: "lossless",
+      qq: "flac",
+      bilibili: "high",
+      kugou: "flac",
+      jellyfin: "320",
+    };
+    saveConfig(path, config);
+    const loaded = loadConfig(path);
+    expect(loaded.audioQuality).toEqual(config.audioQuality);
+  });
+
+  it("coerces missing / non-string audioQuality fields to defaults", () => {
+    const dir = makeTmpDir();
+    const path = join(dir, "config.json");
+    // netease valid, qq blank, bilibili wrong type, kugou missing, jellyfin valid.
+    writeFileSync(
+      path,
+      JSON.stringify({ audioQuality: { netease: "lossless", qq: "  ", bilibili: 320, jellyfin: "192" } }),
+    );
+    const config = loadConfig(path);
+    expect(config.audioQuality).toEqual({
+      netease: "lossless",
+      qq: "exhigh", // blank → default
+      bilibili: "high", // non-string → default
+      kugou: "128", // missing → default
+      jellyfin: "192",
+    });
+  });
+
  it("creates config file on save", () => {
    const dir = makeTmpDir();
    const path = join(dir, "sub", "config.json");
@@ -494,4 +676,28 @@ describe("loadConfig error handling", () => {
      expect(readFileSync(join(dir, backups[0]), "utf-8")).toBe(content);
    }
  });
+
+  it("defaults savedQueuesEnabled and playKeepsQueue to false", () => {
+    const c = getDefaultConfig();
+    expect(c.savedQueuesEnabled).toBe(false);
+    expect(c.playKeepsQueue).toBe(false);
+  });
+
+  it("coerces non-boolean savedQueues/playKeepsQueue values to false on load", () => {
+    const dir = makeTmpDir();
+    const path = join(dir, "config.json");
+    writeFileSync(path, JSON.stringify({ savedQueuesEnabled: "yes", playKeepsQueue: 1 }));
+    const c = loadConfig(path);
+    expect(c.savedQueuesEnabled).toBe(false);
+    expect(c.playKeepsQueue).toBe(false);
+  });
+
+  it("preserves savedQueues/playKeepsQueue true when explicitly enabled", () => {
+    const dir = makeTmpDir();
+    const path = join(dir, "config.json");
+    writeFileSync(path, JSON.stringify({ savedQueuesEnabled: true, playKeepsQueue: true }));
+    const c = loadConfig(path);
+    expect(c.savedQueuesEnabled).toBe(true);
+    expect(c.playKeepsQueue).toBe(true);
+  });
 });
@@ -38,6 +38,28 @@ export interface JellyfinConfig {
  userId: string;
 }

+/**
+ * Per-provider audio quality (音质), persisted so a restart keeps the user's
+ * choice instead of resetting each provider to its in-memory default (#125).
+ * The values are the same strings the WebUI/REST `POST /api/music/quality`
+ * endpoint sends and each provider's setQuality() accepts; on startup they are
+ * replayed onto the (shared, process-wide) providers. Providers ignore/normalize
+ * unknown values, so a stale/hand-edited entry can never break playback.
+ */
+export interface AudioQualityConfig {
+  netease: string;
+  qq: string;
+  bilibili: string;
+  kugou: string;
+  jellyfin: string;
+}
+
+export interface VoiceDuckingConfig {
+  enabled: boolean;
+  /** Percentage of the normal playback volume retained while someone speaks. */
+  volumePercent: number;
+}
+
 /**
 * Providers gated by `enabledProviders`. Not listed here:
 *  - "local"   → governed by the existing `localAudioEnabled` flag
@@ -61,15 +83,24 @@ export function isProviderEnabled(config: BotConfig, platform: string): boolean
 }

 /**
- * The default platform for !play/!add/!playlist/!album and all REST/WebUI calls:
- * the first enabled provider in a fixed priority order (netease with the default
- * config; jellyfin ranks after the online music platforms because it is an
- * opt-in source, but ahead of the video sites for users who run it as their
- * only music library). Falls back to "netease" when nothing is enabled so
- * callers always get a provider — the enabled-gate then produces the friendly
- * error.
+ * The default platform for !play/!add/!playlist/!album and all REST/WebUI calls.
+ *
+ * An explicit user preference (`config.defaultPlatform`) wins whenever it points
+ * at a source that is currently enabled — this lets e.g. a Bilibili-loving server
+ * set B站 as the default so `!play <歌名>` needs no `-b` flag (issue #126). The
+ * enabled-guard here matters at runtime too: if the operator later disables the
+ * preferred source, we must fall through instead of returning a dead default.
+ *
+ * With no (usable) preference we fall back to the first enabled provider in a
+ * fixed priority order (netease with the default config; jellyfin ranks after
+ * the online music platforms because it is an opt-in source, but ahead of the
+ * video sites for users who run it as their only music library). Falls back to
+ * "netease" when nothing is enabled so callers always get a provider — the
+ * enabled-gate then produces the friendly error.
 */
 export function defaultPlatform(config: BotConfig): GateableProvider {
+  const pref = config.defaultPlatform;
+  if (pref && config.enabledProviders.includes(pref)) return pref;
  for (const p of ["netease", "qq", "kugou", "jellyfin", "bilibili", "youtube"] as const) {
    if (config.enabledProviders.includes(p)) return p;
  }
@@ -88,9 +119,24 @@ export interface BotConfig {
  adminGroups: number[];
  autoReturnDelay: number;
  autoPauseOnEmpty: boolean;
+  /** Lower music volume while voice from another client is being received. */
+  voiceDucking: VoiceDuckingConfig;
  idleTimeoutMinutes: number;
  /** Enable uploading and playback of server-stored local audio files. */
  localAudioEnabled: boolean;
+  /**
+   * Enable named save/load of queues (chat + web) AND auto-restore of the live
+   * queue across a restart. Admin-controlled; default false so nothing is
+   * persisted/restored until an operator opts in.
+   */
+  savedQueuesEnabled: boolean;
+  /**
+   * When true, a single-song immediate !play (chat) / play-song (web) inserts
+   * after the current track and jumps to it instead of clearing the queue, so
+   * the rest of the queue survives and continues afterwards. Default false
+   * keeps today's clear-and-play behavior.
+   */
+  playKeepsQueue: boolean;
  // Public base URL used when generating share links (e.g. the bot专属链接).
  // Leave empty to use the browser's current origin. Example:
  //   "https://music.example.com" or "http://1.2.3.4:3000"
@@ -102,6 +148,8 @@ export interface BotConfig {
  guestMode: GuestModeConfig;
  spotify: SpotifyConfig;
  jellyfin: JellyfinConfig;
+  /** Persisted per-provider audio quality (音质), restored on startup (#125). */
+  audioQuality: AudioQualityConfig;
  /**
   * Which gateable providers are active (see GATEABLE_PROVIDERS). Default is
   * the online sources (NetEase/QQ/Bilibili/YouTube/Kugou); jellyfin is an
@@ -110,6 +158,14 @@ export interface BotConfig {
   * API servers must not start (or bind ports 3001/3200) unless enabled.
   */
  enabledProviders: GateableProvider[];
+  /**
+   * Optional operator-chosen default source for commands/REST/WebUI calls that
+   * omit a platform (issue #126). When set to an enabled gateable provider it
+   * overrides the fixed priority order in defaultPlatform(); `null` (the default)
+   * keeps that priority order. loadConfig cleans stale/unknown/disabled values
+   * back to null.
+   */
+  defaultPlatform: GateableProvider | null;
 }

 export function getDefaultConfig(): BotConfig {
@@ -128,8 +184,14 @@ export function getDefaultConfig(): BotConfig {
    // command, which is unreliable on some servers (it can time out when other
    // clients are present). Users can opt in from the web UI.
    autoPauseOnEmpty: false,
+    voiceDucking: {
+      enabled: false,
+      volumePercent: 30,
+    },
    idleTimeoutMinutes: 0,
    localAudioEnabled: true,
+    savedQueuesEnabled: false,
+    playKeepsQueue: false,
    publicUrl: "",
    trustProxy: false,
    guestMode: {
@@ -162,7 +224,17 @@ export function getDefaultConfig(): BotConfig {
      apiKey: "",
      userId: "",
    },
+    // Mirrors each provider's own in-memory default quality; overwritten on
+    // startup once the user has changed a quality (persisted via #125).
+    audioQuality: {
+      netease: "exhigh",
+      qq: "exhigh",
+      bilibili: "high",
+      kugou: "128",
+      jellyfin: "direct",
+    },
    enabledProviders: ["netease", "qq", "bilibili", "youtube", "kugou"],
+    defaultPlatform: null,
  };
 }

@@ -317,6 +389,63 @@ export function loadConfig(path: string): BotConfig {
        )
      : defaults.enabledProviders;

+    // Strict-coerce the two feature flags exactly like spotify.enabled so a
+    // hand-edited / legacy / corrupt config.json can never silently enable
+    // them (`"yes"`, `1`, `null` → false; only a literal `true` enables).
+    const savedQueuesEnabled = partial.savedQueuesEnabled === true;
+    const playKeepsQueue = partial.playKeepsQueue === true;
+
+    // Voice ducking is opt-in and the retained-volume percentage is consumed
+    // directly by the audio path. Only a plain-object block with correctly
+    // typed, finite and in-range fields may override the safe defaults.
+    const rawVoiceDucking = partial.voiceDucking;
+    const partialVoiceDucking =
+      rawVoiceDucking !== null &&
+      typeof rawVoiceDucking === "object" &&
+      !Array.isArray(rawVoiceDucking)
+        ? (rawVoiceDucking as Partial<VoiceDuckingConfig>)
+        : {};
+    const rawVolumePercent = partialVoiceDucking.volumePercent;
+    const voiceDucking: VoiceDuckingConfig = {
+      enabled:
+        typeof partialVoiceDucking.enabled === "boolean"
+          ? partialVoiceDucking.enabled
+          : defaults.voiceDucking.enabled,
+      volumePercent:
+        typeof rawVolumePercent === "number" &&
+        Number.isFinite(rawVolumePercent) &&
+        rawVolumePercent >= 0 &&
+        rawVolumePercent <= 100
+          ? rawVolumePercent
+          : defaults.voiceDucking.volumePercent,
+    };
+
+    // defaultPlatform → an explicit operator default (issue #126). Keep it only
+    // when it names a KNOWN gateable provider that is ALSO currently enabled;
+    // anything else (unknown value, disabled source, wrong type, missing) becomes
+    // null so defaultPlatform() falls back to the fixed priority order.
+    const rawDefault = partial.defaultPlatform;
+    const defaultPlatformPref: GateableProvider | null =
+      typeof rawDefault === "string" &&
+      (GATEABLE_PROVIDERS as readonly string[]).includes(rawDefault) &&
+      enabledProviders.includes(rawDefault as GateableProvider)
+        ? (rawDefault as GateableProvider)
+        : null;
+
+    // audioQuality → per-provider strings; each field falls back to its default
+    // when missing/blank/non-string (a hand-edited/legacy config must never smuggle
+    // a non-string past the gate — the value is fed straight to provider.setQuality).
+    const partialAq = (partial.audioQuality ?? {}) as Partial<AudioQualityConfig>;
+    const coerceQuality = (v: unknown, fallback: string): string =>
+      typeof v === "string" && v.trim() ? v : fallback;
+    const audioQuality: AudioQualityConfig = {
+      netease: coerceQuality(partialAq.netease, defaults.audioQuality.netease),
+      qq: coerceQuality(partialAq.qq, defaults.audioQuality.qq),
+      bilibili: coerceQuality(partialAq.bilibili, defaults.audioQuality.bilibili),
+      kugou: coerceQuality(partialAq.kugou, defaults.audioQuality.kugou),
+      jellyfin: coerceQuality(partialAq.jellyfin, defaults.audioQuality.jellyfin),
+    };
+
    return {
      ...defaults,
      ...partial,
@@ -324,7 +453,12 @@ export function loadConfig(path: string): BotConfig {
      guestMode: gm,
      spotify,
      jellyfin,
+      audioQuality,
      enabledProviders,
+      savedQueuesEnabled,
+      playKeepsQueue,
+      voiceDucking,
+      defaultPlatform: defaultPlatformPref,
    };
  }
 }
@@ -2,7 +2,7 @@ import { mkdtempSync, rmSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { describe, it, expect, beforeEach, afterEach } from "vitest";
-import { createDatabase, type BotDatabase, type BotInstance, type PlayHistoryEntry } from "./database.js";
+import { createDatabase, SHARED_QUEUE_OWNER, type BotDatabase, type BotInstance, type PlayHistoryEntry } from "./database.js";
 import { createUserStore, GUEST_USER_ID } from "./users.js";

 describe("database", () => {
@@ -131,6 +131,92 @@ describe("database", () => {
    expect(botDb.deleteBotInstance("nonexistent")).toBe(false);
  });

+  it("persists and restores per-bot player settings (volume + play mode) (#125)", () => {
+    const inst = {
+      id: "bot-ps",
+      name: "B",
+      serverAddress: "x",
+      serverPort: 9987,
+      nickname: "n",
+      defaultChannel: "",
+      channelId: "",
+      channelPassword: "",
+      autoStart: false,
+      serverProtocol: "",
+      ts6ApiKey: "",
+      serverPassword: "",
+    };
+    botDb.saveBotInstance(inst);
+
+    // Fresh row → in-memory defaults.
+    expect(botDb.getPlayerSettings("bot-ps")).toEqual({ volume: 75, playMode: "seq" });
+
+    // Volume and play mode persist independently.
+    botDb.saveVolume("bot-ps", 42);
+    expect(botDb.getPlayerSettings("bot-ps")).toEqual({ volume: 42, playMode: "seq" });
+    botDb.savePlayMode("bot-ps", "rloop");
+    expect(botDb.getPlayerSettings("bot-ps")).toEqual({ volume: 42, playMode: "rloop" });
+
+    // A later saveBotInstance upsert (e.g. autoStart toggle) must NOT reset them.
+    botDb.saveBotInstance({ ...inst, autoStart: true });
+    expect(botDb.getPlayerSettings("bot-ps")).toEqual({ volume: 42, playMode: "rloop" });
+  });
+
+  it("defaults player settings for an unknown bot and validates inputs (#125)", () => {
+    // No row → defaults.
+    expect(botDb.getPlayerSettings("does-not-exist")).toEqual({ volume: 75, playMode: "seq" });
+
+    botDb.saveBotInstance({
+      id: "bot-v",
+      name: "B",
+      serverAddress: "x",
+      serverPort: 9987,
+      nickname: "n",
+      defaultChannel: "",
+      channelId: "",
+      channelPassword: "",
+      autoStart: false,
+      serverProtocol: "",
+      ts6ApiKey: "",
+      serverPassword: "",
+    });
+    // Out-of-range volume is clamped; an unknown play mode is ignored (not stored).
+    botDb.saveVolume("bot-v", 250);
+    expect(botDb.getPlayerSettings("bot-v").volume).toBe(100);
+    botDb.saveVolume("bot-v", -10);
+    expect(botDb.getPlayerSettings("bot-v").volume).toBe(0);
+    botDb.savePlayMode("bot-v", "bogus");
+    expect(botDb.getPlayerSettings("bot-v").playMode).toBe("seq");
+  });
+
+  it("migrates volume + play_mode columns onto a legacy bot_instances table (#125)", () => {
+    const dir = mkdtempSync(join(tmpdir(), "tsmb-mig-"));
+    const p = join(dir, "legacy.db");
+    // Build a minimal pre-#125 bot_instances table (no volume/play_mode columns).
+    const legacy = createDatabase(p);
+    legacy.db.exec("DROP TABLE bot_instances");
+    legacy.db.exec(`CREATE TABLE bot_instances (
+      id TEXT PRIMARY KEY, name TEXT NOT NULL, serverAddress TEXT NOT NULL,
+      serverPort INTEGER NOT NULL, nickname TEXT NOT NULL, defaultChannel TEXT NOT NULL,
+      channelId TEXT NOT NULL DEFAULT '', channelPassword TEXT NOT NULL,
+      autoStart INTEGER NOT NULL DEFAULT 0, serverProtocol TEXT NOT NULL DEFAULT '',
+      ts6ApiKey TEXT NOT NULL DEFAULT '', serverPassword TEXT NOT NULL DEFAULT '', identity TEXT
+    )`);
+    legacy.db
+      .prepare("INSERT INTO bot_instances (id, name, serverAddress, serverPort, nickname, defaultChannel, channelPassword) VALUES (?, 'B', 'x', 9987, 'n', '', '')")
+      .run("legacy-bot");
+    legacy.close();
+
+    // Reopen → migrateSchema adds the columns; the old row gets the defaults.
+    const reopened = createDatabase(p);
+    const cols = (reopened.db.prepare("PRAGMA table_info(bot_instances)").all() as Array<{ name: string }>).map((c) => c.name);
+    expect(cols).toContain("volume");
+    expect(cols).toContain("play_mode");
+    expect(reopened.getPlayerSettings("legacy-bot")).toEqual({ volume: 75, playMode: "seq" });
+    reopened.close();
+    rmSync(dir, { recursive: true, force: true });
+  });
+
  it("persists and clears customAvatarPath on a bot instance", () => {
    const inst = {
      id: "bot-1",
@@ -153,6 +239,86 @@ describe("database", () => {
    botDb.setCustomAvatarPath("bot-1", null);
    expect(botDb.getCustomAvatarPath("bot-1")).toBeNull();
  });
+
+  const sq = (id: string) => ({
+    id,
+    name: id,
+    artist: "",
+    album: "",
+    platform: "netease" as const,
+    coverUrl: "",
+    duration: 1,
+  });
+
+  describe("saved_queues", () => {
+    it("upserts by (ownerId, name) and returns songs", () => {
+      botDb.saveQueue("u1", "night", [sq("a"), sq("b")]);
+      const again = botDb.saveQueue("u1", "night", [sq("c")]); // overwrite
+      expect(again.songCount).toBe(1);
+      expect(botDb.listSavedQueues("u1", false)).toHaveLength(1);
+      const full = botDb.getSavedQueue(again.id)!;
+      expect(full.songs.map((s) => s.id)).toEqual(["c"]);
+    });
+
+    it("strips url before persisting", () => {
+      const saved = botDb.saveQueue("u1", "x", [
+        { ...sq("a"), url: "http://example.com/a.mp3" } as never,
+      ]);
+      const full = botDb.getSavedQueue(saved.id)!;
+      expect((full.songs[0] as { url?: string }).url).toBeUndefined();
+    });
+
+    it("lists own + shared when includeShared, own-only otherwise", () => {
+      botDb.saveQueue("u1", "mine", [sq("a")]);
+      botDb.saveQueue(SHARED_QUEUE_OWNER, "party", [sq("b")]);
+      expect(botDb.listSavedQueues("u1", false).map((q) => q.name)).toEqual(["mine"]);
+      expect(
+        botDb.listSavedQueues("u1", true).map((q) => q.name).sort(),
+      ).toEqual(["mine", "party"]);
+    });
+
+    it("caps songs at 1000 and queues at 50", () => {
+      expect(() =>
+        botDb.saveQueue("u1", "big", Array.from({ length: 1001 }, (_, i) => sq("s" + i))),
+      ).toThrow(/1000/);
+      for (let i = 0; i < 50; i++) botDb.saveQueue("u1", "q" + i, [sq("a")]);
+      expect(() => botDb.saveQueue("u1", "q50", [sq("a")])).toThrow(/50/);
+      // Overwriting an existing name is always allowed despite the cap.
+      expect(() => botDb.saveQueue("u1", "q0", [sq("z")])).not.toThrow();
+    });
+
+    it("deletes and degrades a corrupt blob to empty", () => {
+      const q = botDb.saveQueue("u1", "x", [sq("a")]);
+      botDb.db.prepare("UPDATE saved_queues SET songs='not json' WHERE id=?").run(q.id);
+      expect(botDb.getSavedQueue(q.id)!.songs).toEqual([]);
+      expect(botDb.deleteSavedQueue(q.id)).toBe(true);
+      expect(botDb.getSavedQueue(q.id)).toBeNull();
+      expect(botDb.deleteSavedQueue(q.id)).toBe(false); // already gone
+    });
+  });
+
+  describe("queue_state", () => {
+    it("upserts, reads back, and clears per bot", () => {
+      botDb.saveQueueState({ botId: "b1", songs: [sq("a")], currentIndex: 0, mode: "loop", isFmMode: true, fmPlatform: "netease" });
+      botDb.saveQueueState({ botId: "b1", songs: [sq("a"), sq("b")], currentIndex: 1, mode: "seq", isFmMode: false, fmPlatform: "" });
+      const st = botDb.getQueueState("b1")!;
+      expect(st.songs.map((s) => s.id)).toEqual(["a", "b"]);
+      expect(st.currentIndex).toBe(1);
+      expect(st.mode).toBe("seq");
+      expect(st.isFmMode).toBe(false);
+      botDb.clearQueueState("b1");
+      expect(botDb.getQueueState("b1")).toBeNull();
+    });
+
+    it("round-trips FM flags and degrades a corrupt blob", () => {
+      botDb.saveQueueState({ botId: "b2", songs: [sq("a")], currentIndex: 0, mode: "random", isFmMode: true, fmPlatform: "qq" });
+      const st = botDb.getQueueState("b2")!;
+      expect(st.isFmMode).toBe(true);
+      expect(st.fmPlatform).toBe("qq");
+      botDb.db.prepare("UPDATE queue_state SET songs='{' WHERE botId=?").run("b2");
+      expect(botDb.getQueueState("b2")!.songs).toEqual([]);
+    });
+  });
 });

 describe("guest principal migration", () => {
@@ -1,6 +1,46 @@
 import Database from "better-sqlite3";
 import { CAPABILITIES, BOTS_ALL } from "./permissions.js";
 import { GUEST_USER_ID, GUEST_USERNAME } from "./users.js";
+import type { QueuedSong } from "../audio/queue.js";
+
+/**
+ * Reserved owner id for chat-saved / opt-in-shared queues. A `__`-bracketed
+ * literal can never collide with a real WebUI user id (UUIDs), so it cleanly
+ * partitions "shared" saved queues from per-user private ones (issue #119).
+ */
+export const SHARED_QUEUE_OWNER = "__shared__";
+/** Cap per owner (private user OR the shared bucket). */
+export const MAX_SAVED_QUEUES = 50;
+/** Cap per saved queue / persisted live-queue snapshot. */
+export const MAX_QUEUE_SONGS = 1000;
+
+/** A stored song is a QueuedSong minus the lazily-resolved `url`. */
+export type StoredSong = Omit<QueuedSong, "url">;
+
+/** Saved-queue row without the (potentially large) songs blob — for list views. */
+export interface SavedQueueMeta {
+  id: number;
+  ownerId: string;
+  name: string;
+  songCount: number;
+  createdAt: string;
+  updatedAt: string;
+}
+
+/** Full saved queue, including its songs. */
+export interface SavedQueue extends SavedQueueMeta {
+  songs: StoredSong[];
+}
+
+/** One-row-per-bot persisted live-queue state (Feature 2, auto-restore). */
+export interface QueueStateRow {
+  botId: string;
+  songs: StoredSong[];
+  currentIndex: number;
+  mode: string;
+  isFmMode: boolean;
+  fmPlatform: string;
+}

 export interface PlayHistoryEntry {
  botId: string;
@@ -55,6 +95,26 @@ export const DEFAULT_PROFILE_CONFIG: ProfileConfig = {
  nowPlayingMsgEnabled: true,
 };

+/**
+ * Per-bot player settings persisted across restarts (#125): the playback volume
+ * and play mode. These reset to defaults on process restart when kept only in
+ * memory (AudioPlayer/PlayQueue), so they are stored on the bot_instances row —
+ * exactly like the per-bot profile flags — and restored when the bot is (re)built.
+ */
+export interface PlayerSettings {
+  /** 0-100. */
+  volume: number;
+  /** PlayMode string: "seq" | "loop" | "random" | "rloop". */
+  playMode: string;
+}
+
+const PLAY_MODES = new Set(["seq", "loop", "random", "rloop"]);
+
+export const DEFAULT_PLAYER_SETTINGS: PlayerSettings = {
+  volume: 75,
+  playMode: "seq",
+};
+
 export interface FavoritePlaylist {
  id: number;
  userId: string;
@@ -75,12 +135,24 @@ export interface BotDatabase {
  deleteBotInstance(id: string): boolean;
  getProfileConfig(botId: string): ProfileConfig;
  saveProfileConfig(botId: string, config: ProfileConfig): void;
+  getPlayerSettings(botId: string): PlayerSettings;
+  saveVolume(botId: string, volume: number): void;
+  savePlayMode(botId: string, playMode: string): void;
  getCustomAvatarPath(botId: string): string | null;
  setCustomAvatarPath(botId: string, path: string | null): void;
  addFavorite(userId: string, playlist: { platform: string; playlistId: string; name: string; coverUrl: string; songCount: number }): void;
  removeFavorite(userId: string, playlistId: string, platform: string): boolean;
  getFavorites(userId: string): FavoritePlaylist[];
  isFavorited(userId: string, playlistId: string, platform: string): boolean;
+  // Saved queues (Feature 1) — upsert by (ownerId, name), capped.
+  saveQueue(ownerId: string, name: string, songs: StoredSong[]): SavedQueue;
+  listSavedQueues(ownerId: string, includeShared: boolean): SavedQueueMeta[];
+  getSavedQueue(id: number): SavedQueue | null;
+  deleteSavedQueue(id: number): boolean;
+  // Live-queue persistence (Feature 2) — one row per bot.
+  saveQueueState(state: QueueStateRow): void;
+  getQueueState(botId: string): QueueStateRow | null;
+  clearQueueState(botId: string): void;
  close(): void;
 }

@@ -119,6 +191,15 @@ function migrateSchema(db: Database.Database): void {
  if (!names.includes("custom_avatar_path")) {
    db.exec("ALTER TABLE bot_instances ADD COLUMN custom_avatar_path TEXT");
  }
+  // Per-bot persisted player settings (#125): volume + play mode. Defaults match
+  // AudioPlayer/PlayQueue's in-memory defaults so pre-existing rows keep behaving
+  // exactly as before until the user changes them.
+  if (!names.includes("volume")) {
+    db.exec("ALTER TABLE bot_instances ADD COLUMN volume INTEGER NOT NULL DEFAULT 75");
+  }
+  if (!names.includes("play_mode")) {
+    db.exec("ALTER TABLE bot_instances ADD COLUMN play_mode TEXT NOT NULL DEFAULT 'seq'");
+  }

  const userColumns = db.prepare("PRAGMA table_info(users)").all() as Array<{ name: string }>;
  const userColNames = userColumns.map((c) => c.name);
@@ -161,6 +242,8 @@ function initTables(db: Database.Database): void {
      serverProtocol TEXT NOT NULL DEFAULT '',
      ts6ApiKey TEXT NOT NULL DEFAULT '',
      serverPassword TEXT NOT NULL DEFAULT '',
+      volume INTEGER NOT NULL DEFAULT 75,
+      play_mode TEXT NOT NULL DEFAULT 'seq',
      identity TEXT
    );

@@ -223,6 +306,28 @@ function initTables(db: Database.Database): void {
      FOREIGN KEY (userId) REFERENCES users(id) ON DELETE CASCADE
    );
    CREATE INDEX IF NOT EXISTS idx_user_bot_access_userId ON user_bot_access(userId);
+
+    CREATE TABLE IF NOT EXISTS saved_queues (
+      id        INTEGER PRIMARY KEY AUTOINCREMENT,
+      ownerId   TEXT NOT NULL,
+      name      TEXT NOT NULL,
+      songs     TEXT NOT NULL,
+      songCount INTEGER NOT NULL DEFAULT 0,
+      createdAt TEXT NOT NULL DEFAULT (datetime('now')),
+      updatedAt TEXT NOT NULL DEFAULT (datetime('now')),
+      UNIQUE(ownerId, name)
+    );
+    CREATE INDEX IF NOT EXISTS idx_saved_queues_ownerId ON saved_queues(ownerId);
+
+    CREATE TABLE IF NOT EXISTS queue_state (
+      botId        TEXT PRIMARY KEY,
+      songs        TEXT NOT NULL,
+      currentIndex INTEGER NOT NULL,
+      mode         TEXT NOT NULL,
+      isFmMode     INTEGER NOT NULL DEFAULT 0,
+      fmPlatform   TEXT NOT NULL DEFAULT '',
+      updatedAt    TEXT NOT NULL DEFAULT (datetime('now'))
+    );
  `);
 }

@@ -321,6 +426,12 @@ export function createDatabase(dbPath: string): BotDatabase {
    WHERE id = @id
  `);

+  const selectPlayerSettings = db.prepare(
+    `SELECT volume, play_mode FROM bot_instances WHERE id = ?`,
+  );
+  const updateVolume = db.prepare(`UPDATE bot_instances SET volume = ? WHERE id = ?`);
+  const updatePlayMode = db.prepare(`UPDATE bot_instances SET play_mode = ? WHERE id = ?`);
+
  const selectCustomAvatar = db.prepare(`SELECT custom_avatar_path FROM bot_instances WHERE id = ?`);
  const updateCustomAvatar = db.prepare(`UPDATE bot_instances SET custom_avatar_path = ? WHERE id = ?`);

@@ -342,6 +453,67 @@ export function createDatabase(dbPath: string): BotDatabase {
    SELECT 1 FROM favorite_playlists WHERE userId = ? AND playlistId = ? AND platform = ?
  `);

+  // A corrupt/hand-edited songs blob must never throw into a route or the
+  // restore path — degrade to an empty list instead.
+  const parseSongs = (raw: string): StoredSong[] => {
+    try {
+      const v = JSON.parse(raw);
+      return Array.isArray(v) ? (v as StoredSong[]) : [];
+    } catch {
+      return [];
+    }
+  };
+  const rowToSavedMeta = (r: {
+    id: number; ownerId: string; name: string; songCount: number; createdAt: string; updatedAt: string;
+  }): SavedQueueMeta => ({
+    id: r.id,
+    ownerId: r.ownerId,
+    name: r.name,
+    songCount: r.songCount,
+    createdAt: r.createdAt,
+    updatedAt: r.updatedAt,
+  });
+
+  const upsertSavedQueue = db.prepare(`
+    INSERT INTO saved_queues (ownerId, name, songs, songCount)
+    VALUES (@ownerId, @name, @songs, @songCount)
+    ON CONFLICT(ownerId, name) DO UPDATE SET
+      songs = excluded.songs,
+      songCount = excluded.songCount,
+      updatedAt = datetime('now')
+  `);
+  const selectSavedQueueByOwnerName = db.prepare(
+    "SELECT * FROM saved_queues WHERE ownerId = ? AND name = ?",
+  );
+  const selectSavedQueueIdByOwnerName = db.prepare(
+    "SELECT id FROM saved_queues WHERE ownerId = ? AND name = ?",
+  );
+  const countSavedQueues = db.prepare(
+    "SELECT COUNT(*) AS c FROM saved_queues WHERE ownerId = ?",
+  );
+  const listSavedQueuesOwn = db.prepare(
+    "SELECT id, ownerId, name, songCount, createdAt, updatedAt FROM saved_queues WHERE ownerId = ? ORDER BY updatedAt DESC",
+  );
+  const listSavedQueuesShared = db.prepare(
+    "SELECT id, ownerId, name, songCount, createdAt, updatedAt FROM saved_queues WHERE ownerId = ? OR ownerId = ? ORDER BY updatedAt DESC",
+  );
+  const selectSavedQueueById = db.prepare("SELECT * FROM saved_queues WHERE id = ?");
+  const deleteSavedQueueById = db.prepare("DELETE FROM saved_queues WHERE id = ?");
+
+  const upsertQueueState = db.prepare(`
+    INSERT INTO queue_state (botId, songs, currentIndex, mode, isFmMode, fmPlatform, updatedAt)
+    VALUES (@botId, @songs, @currentIndex, @mode, @isFmMode, @fmPlatform, datetime('now'))
+    ON CONFLICT(botId) DO UPDATE SET
+      songs = excluded.songs,
+      currentIndex = excluded.currentIndex,
+      mode = excluded.mode,
+      isFmMode = excluded.isFmMode,
+      fmPlatform = excluded.fmPlatform,
+      updatedAt = datetime('now')
+  `);
+  const selectQueueState = db.prepare("SELECT * FROM queue_state WHERE botId = ?");
+  const deleteQueueState = db.prepare("DELETE FROM queue_state WHERE botId = ?");
+
  return {
    db,

@@ -406,6 +578,36 @@ export function createDatabase(dbPath: string): BotDatabase {
      });
    },

+    getPlayerSettings(botId) {
+      const row = selectPlayerSettings.get(botId) as
+        | { volume: number | null; play_mode: string | null }
+        | undefined;
+      if (!row) return { ...DEFAULT_PLAYER_SETTINGS };
+      // Coerce/validate: clamp volume to 0-100 and fall back to defaults for any
+      // NULL / out-of-range / unknown value (a hand-edited DB must never feed a
+      // bad value into AudioPlayer.setVolume / PlayQueue.setMode).
+      const rawVol = typeof row.volume === "number" ? row.volume : DEFAULT_PLAYER_SETTINGS.volume;
+      const volume = Number.isFinite(rawVol)
+        ? Math.max(0, Math.min(100, Math.round(rawVol)))
+        : DEFAULT_PLAYER_SETTINGS.volume;
+      const playMode =
+        typeof row.play_mode === "string" && PLAY_MODES.has(row.play_mode)
+          ? row.play_mode
+          : DEFAULT_PLAYER_SETTINGS.playMode;
+      return { volume, playMode };
+    },
+
+    saveVolume(botId, volume) {
+      const clamped = Math.max(0, Math.min(100, Math.round(volume)));
+      updateVolume.run(clamped, botId);
+    },
+
+    savePlayMode(botId, playMode) {
+      // Persist only recognized modes so a bad value can never poison the row.
+      if (!PLAY_MODES.has(playMode)) return;
+      updatePlayMode.run(playMode, botId);
+    },
+
    getCustomAvatarPath(botId) {
      const row = selectCustomAvatar.get(botId) as { custom_avatar_path: string | null } | undefined;
      return row?.custom_avatar_path ?? null;
@@ -432,6 +634,85 @@ export function createDatabase(dbPath: string): BotDatabase {
      return row !== undefined;
    },

+    saveQueue(ownerId, name, songs) {
+      if (songs.length > MAX_QUEUE_SONGS) {
+        throw new Error(`保存失败：歌曲数量超过上限 ${MAX_QUEUE_SONGS}`);
+      }
+      // Strip any lazily-resolved url before persisting.
+      const stripped: StoredSong[] = songs.map((s) => {
+        const { url: _url, ...rest } = s as QueuedSong;
+        return rest;
+      });
+      // Enforce the per-owner cap only for a NEW name (an overwrite of an
+      // existing saved queue must always be allowed).
+      const existing = selectSavedQueueIdByOwnerName.get(ownerId, name) as
+        | { id: number }
+        | undefined;
+      if (!existing) {
+        const { c } = countSavedQueues.get(ownerId) as { c: number };
+        if (c >= MAX_SAVED_QUEUES) {
+          throw new Error(`保存失败：已保存队列数量超过上限 ${MAX_SAVED_QUEUES}`);
+        }
+      }
+      upsertSavedQueue.run({
+        ownerId,
+        name,
+        songs: JSON.stringify(stripped),
+        songCount: stripped.length,
+      });
+      const row = selectSavedQueueByOwnerName.get(ownerId, name) as SavedQueueMeta;
+      return { ...rowToSavedMeta(row), songs: stripped };
+    },
+
+    listSavedQueues(ownerId, includeShared) {
+      const rows = includeShared
+        ? (listSavedQueuesShared.all(ownerId, SHARED_QUEUE_OWNER) as SavedQueueMeta[])
+        : (listSavedQueuesOwn.all(ownerId) as SavedQueueMeta[]);
+      return rows.map(rowToSavedMeta);
+    },
+
+    getSavedQueue(id) {
+      const row = selectSavedQueueById.get(id) as
+        | (SavedQueueMeta & { songs: string })
+        | undefined;
+      if (!row) return null;
+      return { ...rowToSavedMeta(row), songs: parseSongs(row.songs) };
+    },
+
+    deleteSavedQueue(id) {
+      return deleteSavedQueueById.run(id).changes > 0;
+    },
+
+    saveQueueState(state) {
+      upsertQueueState.run({
+        botId: state.botId,
+        songs: JSON.stringify(state.songs),
+        currentIndex: state.currentIndex,
+        mode: state.mode,
+        isFmMode: state.isFmMode ? 1 : 0,
+        fmPlatform: state.fmPlatform,
+      });
+    },
+
+    getQueueState(botId) {
+      const r = selectQueueState.get(botId) as
+        | { botId: string; songs: string; currentIndex: number; mode: string; isFmMode: number; fmPlatform: string }
+        | undefined;
+      if (!r) return null;
+      return {
+        botId: r.botId,
+        songs: parseSongs(r.songs),
+        currentIndex: r.currentIndex,
+        mode: r.mode,
+        isFmMode: r.isFmMode === 1,
+        fmPlatform: r.fmPlatform,
+      };
+    },
+
+    clearQueueState(botId) {
+      deleteQueueState.run(botId);
+    },
+
    close() {
      db.close();
    },
@@ -100,6 +100,15 @@ async function main() {
  if (jellyfinAuth) jellyfinProvider.setCookie(jellyfinAuth);
  jellyfinProvider.setPersist((serialized) => cookieStore.save("jellyfin", serialized));

+  // Restore the persisted per-provider audio quality (#125) onto the shared,
+  // process-wide providers so a restart keeps the user's choice. setQuality()
+  // normalizes/ignores unknown values, so a stale entry can never break playback.
+  neteaseProvider.setQuality(config.audioQuality.netease);
+  qqProvider.setQuality(config.audioQuality.qq);
+  bilibiliProvider.setQuality(config.audioQuality.bilibili);
+  kugouProvider.setQuality(config.audioQuality.kugou);
+  jellyfinProvider.setQuality(config.audioQuality.jellyfin);
+
  const permissions = createPermissionStore(db.db);

  // Single process-wide Spotify authorization (one Premium account for Stage 3).
@@ -1,5 +1,34 @@
-import { describe, it, expect } from "vitest";
-import { describeQqApiStartupError } from "./api-server.js";
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { createApiServerManager, describeQqApiStartupError } from "./api-server.js";
+import type { Logger } from "../logger.js";
+
+// Record every listen() the QQ sidecar makes so we can assert it is always
+// pinned to the configured port (regression coverage for issue #122).
+const mockState = vi.hoisted(() => ({
+  listenCalls: [] as Array<{ port: number; host: string }>,
+}));
+
+vi.mock("@sansenjian/qq-music-api", () => {
+  const app = {
+    listen(port: number, host: string, cb?: () => void) {
+      mockState.listenCalls.push({ port, host });
+      const server = {
+        address: () => ({ port, address: host, family: "IPv4" as const }),
+        on() {
+          return server;
+        },
+        close(done?: () => void) {
+          done?.();
+        },
+      };
+      // Real net/Koa fire the listening callback on a later tick, after the
+      // caller has captured the returned server handle.
+      if (cb) setImmediate(cb);
+      return server;
+    },
+  };
+  return { default: app };
+});

 describe("describeQqApiStartupError", () => {
  it("flags ERR_REQUIRE_ESM by error code with version-pin guidance", () => {
@@ -28,3 +57,77 @@ describe("describeQqApiStartupError", () => {
    expect(describeQqApiStartupError(null)).toBeNull();
  });
 });
+
+// Regression coverage for issue #122: the QQ Music API sidecar must listen on
+// the same port the client base URL targets (config.qqMusicApiPort). A stale
+// build once bound 3300 while the client requested 3200, silently breaking the
+// QQ login QR / search flow with ECONNREFUSED on 127.0.0.1:3200.
+describe("createApiServerManager — QQ sidecar port binding", () => {
+  const noopLogger = {
+    info() {},
+    warn() {},
+    error() {},
+    debug() {},
+    trace() {},
+    fatal() {},
+  } as unknown as Logger;
+
+  beforeEach(() => {
+    mockState.listenCalls = [];
+  });
+
+  it("listens on the configured qqMusicPort and exposes a matching base URL", async () => {
+    const port = 39217; // uncommon port to avoid clashing with a real instance
+    const manager = createApiServerManager(
+      { neteasePort: 39218, qqMusicPort: port, neteaseEnabled: false, qqEnabled: true },
+      noopLogger
+    );
+    await manager.start();
+    manager.stop();
+
+    expect(manager.getQQMusicBaseUrl()).toBe(`http://127.0.0.1:${port}`);
+    expect(mockState.listenCalls).toEqual([{ port, host: "127.0.0.1" }]);
+  });
+
+  it("follows qqMusicPort — not an injected PORT — and restores PORT afterwards", async () => {
+    const port = 39219;
+    const previous = process.env.PORT;
+    // Simulate a hosting platform / compose file injecting a stray PORT that
+    // must NOT leak into the QQ sidecar's chosen port.
+    process.env.PORT = "39999";
+    const manager = createApiServerManager(
+      { neteasePort: 39220, qqMusicPort: port, neteaseEnabled: false, qqEnabled: true },
+      noopLogger
+    );
+    try {
+      await manager.start();
+      // The sidecar follows qqMusicPort, never the injected PORT.
+      expect(mockState.listenCalls).toEqual([{ port, host: "127.0.0.1" }]);
+      // The injected PORT is restored so nothing else in the process is affected.
+      expect(process.env.PORT).toBe("39999");
+    } finally {
+      manager.stop();
+      if (previous === undefined) delete process.env.PORT;
+      else process.env.PORT = previous;
+    }
+  });
+
+  it("leaves an absent PORT env unset after importing the sidecar", async () => {
+    const port = 39221;
+    const previous = process.env.PORT;
+    delete process.env.PORT;
+    const manager = createApiServerManager(
+      { neteasePort: 39222, qqMusicPort: port, neteaseEnabled: false, qqEnabled: true },
+      noopLogger
+    );
+    try {
+      await manager.start();
+      // Was unset before importing — must be unset again, no leaked override.
+      expect(process.env.PORT).toBeUndefined();
+    } finally {
+      manager.stop();
+      if (previous === undefined) delete process.env.PORT;
+      else process.env.PORT = previous;
+    }
+  });
+});
@@ -114,7 +114,25 @@ export function createApiServerManager(
            "QQ Music API port already in use — reusing existing instance"
          );
        } else {
-          const qqModule = (await import("@sansenjian/qq-music-api")) as any;
+          // Pin the upstream server to the configured port before importing.
+          // The package derives its default port from process.env.PORT (falling
+          // back to 3200) and, in some historical versions, auto-started that
+          // server as an import side effect. Aligning PORT with qqMusicApiPort
+          // guarantees the sidecar can never bind a different port than the one
+          // the client base URL (getQQMusicBaseUrl) targets — the root cause of
+          // issue #122, where an old build listened on 3300 while the client
+          // requested 3200. Restore the previous value right after import so we
+          // never leak the override into the rest of the process (e.g. the web
+          // server or the NetEase sidecar, which also read PORT as a fallback).
+          const prevPortEnv = process.env.PORT;
+          process.env.PORT = String(options.qqMusicPort);
+          let qqModule: any;
+          try {
+            qqModule = (await import("@sansenjian/qq-music-api")) as any;
+          } finally {
+            if (prevPortEnv === undefined) delete process.env.PORT;
+            else process.env.PORT = prevPortEnv;
+          }
          // The module's export structure varies between versions:
          //   2.2.11+: default → Koa app (has .listen)
          //   2.2.10:  default → wrapper object whose .default is the Koa app
@@ -124,16 +142,34 @@ export function createApiServerManager(
            ? candidate
            : candidate.default ?? null;
          if (koaApp && typeof koaApp.listen === "function") {
-            qqMusicServer = await new Promise<Server>((resolve, reject) => {
-              const srv = koaApp.listen(options.qqMusicPort, "127.0.0.1", () =>
-                resolve(srv)
+            // A version that auto-started on import has already bound the
+            // configured port (thanks to the PORT alignment above); reuse it
+            // rather than racing a second listen that would fail EADDRINUSE.
+            const stillFree = await isPortFree(options.qqMusicPort);
+            if (!stillFree) {
+              logger.info(
+                { port: options.qqMusicPort },
+                "QQ Music API already listening on the configured port (auto-started on import) — reusing embedded instance"
              );
-              srv.on("error", reject);
-            });
-            logger.info(
-              { port: options.qqMusicPort },
-              "QQ Music API started"
-            );
+            } else {
+              qqMusicServer = await new Promise<Server>((resolve, reject) => {
+                const srv = koaApp.listen(options.qqMusicPort, "127.0.0.1", () =>
+                  resolve(srv)
+                );
+                srv.on("error", reject);
+              });
+              // Log the port actually bound (read from the socket) rather than
+              // the requested one, so operators can spot a mismatch in the logs.
+              const addr = qqMusicServer.address();
+              const boundPort =
+                addr && typeof addr === "object" && addr !== null
+                  ? addr.port
+                  : options.qqMusicPort;
+              logger.info(
+                { port: boundPort },
+                "QQ Music API started"
+              );
+            }
          } else {
            logger.warn("QQ Music API module does not expose a Koa app");
          }
@@ -37,3 +37,128 @@ describe("BiliBiliProvider.search pagination", () => {
    expect(searchParams(get).page).toBe("1");
  });
 });
+
+describe("BiliBiliProvider multi-P support", () => {
+  it("parseBilibiliId extracts bvid and page correctly", async () => {
+    const { parseBilibiliId } = await import("./bilibili.js");
+    expect(parseBilibiliId("BV1yxHQeYEuE")).toEqual({ bvid: "BV1yxHQeYEuE", page: 1 });
+    expect(parseBilibiliId("BV1yxHQeYEuE?p=3")).toEqual({ bvid: "BV1yxHQeYEuE", page: 3 });
+    expect(parseBilibiliId("BV1yxHQeYEuE:p2")).toEqual({ bvid: "BV1yxHQeYEuE", page: 2 });
+    expect(parseBilibiliId("https://www.bilibili.com/video/BV1yxHQeYEuE?p=5")).toEqual({
+      bvid: "BV1yxHQeYEuE",
+      page: 5,
+    });
+    expect(parseBilibiliId("some-other-id")).toEqual({ bvid: "some-other-id", page: 1 });
+  });
+
+  function mockViewProvider(viewData: any, playUrlData?: any) {
+    const p = new BiliBiliProvider();
+    const get = vi.fn().mockImplementation((url: string, opts?: any) => {
+      if (url === "/x/web-interface/view") {
+        return Promise.resolve({ data: { data: viewData } });
+      }
+      if (url === "/x/player/playurl") {
+        return Promise.resolve({ data: { data: playUrlData ?? {} } });
+      }
+      return Promise.resolve({ data: {} });
+    });
+    (p as any).buvidInitialized = true;
+    (p as any).api = { get };
+    return { p, get };
+  }
+
+  const multiPViewData = {
+    bvid: "BV1multiP",
+    title: "测试多P教程",
+    pic: "http://i0.hdslb.com/bfs/archive/test.jpg",
+    duration: 300, // 总时长 300 秒 (120 + 180)
+    owner: { name: "UP主测试" },
+    pages: [
+      { cid: 10001, page: 1, part: "第一讲 入门", duration: 120 },
+      { cid: 10002, page: 2, part: "第二讲 进阶", duration: 180 },
+    ],
+  };
+
+  const singlePViewData = {
+    bvid: "BV1singleP",
+    title: "测试单P视频",
+    pic: "http://i0.hdslb.com/bfs/archive/single.jpg",
+    duration: 200,
+    owner: { name: "UP主测试" },
+    pages: [
+      { cid: 20001, page: 1, part: "测试单P视频", duration: 200 },
+    ],
+  };
+
+  it("getSongDetail for single-P video returns total duration and clean bvid", async () => {
+    const { p } = mockViewProvider(singlePViewData);
+    const song = await p.getSongDetail("BV1singleP");
+    expect(song).not.toBeNull();
+    expect(song!.id).toBe("BV1singleP");
+    expect(song!.name).toBe("测试单P视频");
+    expect(song!.duration).toBe(200);
+    expect(song!.platform).toBe("bilibili");
+  });
+
+  it("getSongDetail for multi-P video without ?p defaults to P1 with P1 duration", async () => {
+    const { p } = mockViewProvider(multiPViewData);
+    const song = await p.getSongDetail("BV1multiP");
+    expect(song).not.toBeNull();
+    expect(song!.id).toBe("BV1multiP?p=1");
+    expect(song!.name).toBe("测试多P教程 - P1 第一讲 入门");
+    expect(song!.duration).toBe(120); // P1 独立时长，而非总时长 300！
+    expect(song!.platform).toBe("bilibili");
+  });
+
+  it("getSongDetail for multi-P video with ?p=2 returns P2 with P2 duration", async () => {
+    const { p } = mockViewProvider(multiPViewData);
+    const song = await p.getSongDetail("BV1multiP?p=2");
+    expect(song).not.toBeNull();
+    expect(song!.id).toBe("BV1multiP?p=2");
+    expect(song!.name).toBe("测试多P教程 - P2 第二讲 进阶");
+    expect(song!.duration).toBe(180); // P2 独立时长
+    expect(song!.platform).toBe("bilibili");
+  });
+
+  it("getVideoParts returns all parts with duration and cid", async () => {
+    const { p } = mockViewProvider(multiPViewData);
+    const partsResult = await p.getVideoParts("BV1multiP");
+    expect(partsResult).not.toBeNull();
+    expect(partsResult!.bvid).toBe("BV1multiP");
+    expect(partsResult!.title).toBe("测试多P教程");
+    expect(partsResult!.parts).toHaveLength(2);
+    expect(partsResult!.parts[0]).toEqual({
+      part: 1,
+      cid: 10001,
+      title: "第一讲 入门",
+      duration: 120,
+    });
+    expect(partsResult!.parts[1]).toEqual({
+      part: 2,
+      cid: 10002,
+      title: "第二讲 进阶",
+      duration: 180,
+    });
+  });
+
+  it("getSongUrl requests playurl with correct cid for specific part", async () => {
+    const playUrlResponse = {
+      dash: {
+        audio: [
+          { bandwidth: 64000, baseUrl: "http://audio.64k.test" },
+          { bandwidth: 320000, baseUrl: "http://audio.320k.test" },
+        ],
+      },
+    };
+    const { p, get } = mockViewProvider(multiPViewData, playUrlResponse);
+
+    const result = await p.getSongUrl("BV1multiP?p=2");
+    expect(result).not.toBeNull();
+    expect(result!.url).toBe("http://audio.320k.test");
+
+    const playurlCall = get.mock.calls.find((c: any[]) => c[0] === "/x/player/playurl");
+    expect(playurlCall).toBeTruthy();
+    expect(playurlCall![1].params.cid).toBe(10002); // 准确传入 P2 的 cid
+    expect(playurlCall![1].params.bvid).toBe("BV1multiP"); // 纯净 bvid
+  });
+});
@@ -27,6 +27,38 @@ const WBI_MIXIN_KEY_ENC_TAB = [

 const WBI_KEY_TTL_MS = 6 * 60 * 60 * 1000; // wbi keys rotate ~daily; refresh every 6h

+export interface BiliVideoPart {
+  part: number;
+  cid: number;
+  title: string;
+  duration: number;
+}
+
+export interface BiliVideoPartsResult {
+  bvid: string;
+  title: string;
+  coverUrl: string;
+  artist: string;
+  parts: BiliVideoPart[];
+}
+
+/**
+ * 解析带有分P信息的 B站 ID 或 URL。
+ * 支持形如 "BVxxxx", "BVxxxx?p=2", "BVxxxx:p2" 以及完整 URL 等格式，默认 page 为 1。
+ */
+export function parseBilibiliId(songId: string): { bvid: string; page: number } {
+  const str = (songId ?? "").trim();
+  const bvMatch = str.match(/BV[0-9A-Za-z]+/i);
+  if (!bvMatch) {
+    return { bvid: str, page: 1 };
+  }
+  const bvid = bvMatch[0];
+  const pageMatch = str.match(/[?&]p=(\d+)|:p?(\d+)/i);
+  const pageStr = pageMatch ? (pageMatch[1] ?? pageMatch[2]) : undefined;
+  const page = pageStr ? parseInt(pageStr, 10) : 1;
+  return { bvid, page: Math.max(1, page) };
+}
+
 export class BiliBiliProvider implements MusicProvider {
  readonly platform = "bilibili" as const;
  private api: AxiosInstance;
@@ -192,18 +224,41 @@ export class BiliBiliProvider implements MusicProvider {
  }

  async getSongDetail(songId: string): Promise<Song | null> {
+    const { bvid, page } = parseBilibiliId(songId);
    try {
      const res = await this.api.get("/x/web-interface/view", {
-        params: { bvid: songId },
+        params: { bvid },
        headers: this.cookieHeaders,
      });

      const data = res.data?.data;
      if (!data) return null;

-      // Cache cid for later audio URL fetching
-      if (data.pages?.[0]?.cid) {
-        this.cidCache.set(songId, data.pages[0].cid);
+      const pages = data.pages ?? [];
+      // 缓存所有分P的 cid 映射
+      for (const p of pages) {
+        this.cidCache.set(`${bvid}?p=${p.page}`, p.cid);
+      }
+      if (pages[0]?.cid) {
+        this.cidCache.set(bvid, pages[0].cid);
+      }
+
+      const targetPage = pages.find((p: any) => p.page === page) ?? pages[0];
+
+      // 若为多P视频，返回对应分P的名称与独立时长
+      if (pages.length > 1 && targetPage) {
+        const partTitle = targetPage.part && targetPage.part !== data.title
+          ? `${data.title} - P${targetPage.page} ${targetPage.part}`
+          : `${data.title} (P${targetPage.page})`;
+        return {
+          id: `${bvid}?p=${targetPage.page}`,
+          name: partTitle,
+          artist: data.owner?.name ?? "",
+          album: "",
+          duration: targetPage.duration ?? 0,
+          coverUrl: this.normalizeCover(data.pic ?? ""),
+          platform: "bilibili" as const,
+        };
      }

      return {
@@ -211,7 +266,7 @@ export class BiliBiliProvider implements MusicProvider {
        name: data.title ?? "",
        artist: data.owner?.name ?? "",
        album: "",
-        duration: data.duration ?? 0,
+        duration: targetPage?.duration ?? data.duration ?? 0,
        coverUrl: this.normalizeCover(data.pic ?? ""),
        platform: "bilibili" as const,
      };
@@ -220,9 +275,47 @@ export class BiliBiliProvider implements MusicProvider {
    }
  }

+  /** 获取视频所有分P列表 */
+  async getVideoParts(bvid: string): Promise<BiliVideoPartsResult | null> {
+    const { bvid: cleanBvid } = parseBilibiliId(bvid);
+    try {
+      const res = await this.api.get("/x/web-interface/view", {
+        params: { bvid: cleanBvid },
+        headers: this.cookieHeaders,
+      });
+
+      const data = res.data?.data;
+      if (!data) return null;
+
+      const pages = data.pages ?? [];
+      for (const p of pages) {
+        this.cidCache.set(`${cleanBvid}?p=${p.page}`, p.cid);
+      }
+      if (pages[0]?.cid) {
+        this.cidCache.set(cleanBvid, pages[0].cid);
+      }
+
+      return {
+        bvid: cleanBvid,
+        title: data.title ?? "",
+        coverUrl: this.normalizeCover(data.pic ?? ""),
+        artist: data.owner?.name ?? "",
+        parts: pages.map((p: any) => ({
+          part: p.page,
+          cid: p.cid,
+          title: p.part ?? `P${p.page}`,
+          duration: p.duration ?? 0,
+        })),
+      };
+    } catch {
+      return null;
+    }
+  }
+
  /** Get CID for a bvid, using cache when available */
-  private async getCid(bvid: string): Promise<number | null> {
-    const cached = this.cidCache.get(bvid);
+  private async getCid(bvid: string, page = 1): Promise<number | null> {
+    const key = page > 1 ? `${bvid}?p=${page}` : bvid;
+    const cached = this.cidCache.get(key) ?? (page === 1 ? this.cidCache.get(`${bvid}?p=1`) : undefined);
    if (cached) return cached;

    // Limit cache size to prevent unbounded growth
@@ -231,20 +324,22 @@ export class BiliBiliProvider implements MusicProvider {
      if (firstKey) this.cidCache.delete(firstKey);
    }

-    const detail = await this.getSongDetail(bvid);
+    const songId = page > 1 ? `${bvid}?p=${page}` : bvid;
+    const detail = await this.getSongDetail(songId);
    if (!detail) return null;
-    return this.cidCache.get(bvid) ?? null;
+    return this.cidCache.get(key) ?? this.cidCache.get(`${bvid}?p=${page}`) ?? this.cidCache.get(bvid) ?? null;
  }

  async getSongUrl(songId: string, _quality?: string): Promise<SongUrlResult | null> {
-    const cid = await this.getCid(songId);
+    const { bvid, page } = parseBilibiliId(songId);
+    const cid = await this.getCid(bvid, page);
    if (!cid) return null;

    try {
      const res = await this.api.get("/x/player/playurl", {
        params: {
          cid,
-          bvid: songId,
+          bvid,
          fnval: 16, // DASH format
        },
        headers: this.cookieHeaders,
@@ -0,0 +1,109 @@
+import { describe, it, expect, beforeEach, afterEach, vi } from "vitest";
+// unlinkSync/rmdirSync are NOT mocked below, so the test's own fixture
+// teardown is unaffected by the simulated lock on *.mp4.
+import { mkdtempSync, statSync, existsSync, readFileSync, unlinkSync, readdirSync, rmdirSync } from "node:fs";
+import { spawnSync } from "node:child_process";
+import { createRequire } from "node:module";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+/**
+ * #149: when the audio track is extracted successfully but the source video
+ * cannot be deleted (Windows keeps files locked briefly — rmSync with
+ * force:true still throws EBUSY/EPERM), the record must fall back to the
+ * ORIGINAL container completely: both the path AND the recorded size.
+ *
+ * Committing the size before the delete succeeded would leave the record
+ * claiming the small extracted size while still holding the whole video, so
+ * totalBytes() under-counts and the upload directory grows past its quota.
+ *
+ * This lives in its own file because it partially mocks node:fs, which would
+ * otherwise leak into every other test in local.test.ts.
+ */
+vi.mock("node:fs", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("node:fs")>();
+  return {
+    ...actual,
+    default: actual,
+    rmSync: (path: string, opts?: object) => {
+      // Simulate the lock on the source video only; every other delete
+      // (the discarded .mka, temp dirs, the reject path) behaves normally.
+      if (typeof path === "string" && path.endsWith(".mp4")) {
+        const err = new Error("EBUSY: resource busy or locked") as NodeJS.ErrnoException;
+        err.code = "EBUSY";
+        throw err;
+      }
+      return actual.rmSync(path, opts as never);
+    },
+  };
+});
+
+const { LocalMusicProvider } = await import("./local.js");
+
+const ffmpeg: string | null = (() => {
+  try {
+    return createRequire(import.meta.url)("ffmpeg-static") as string;
+  } catch {
+    return null;
+  }
+})();
+const have = !!ffmpeg && spawnSync(ffmpeg, ["-version"], { stdio: "ignore" }).status === 0;
+
+let dir: string;
+beforeEach(() => { dir = mkdtempSync(join(tmpdir(), "local-extract-fallback-")); });
+afterEach(() => {
+  // Recursive teardown without rmSync (mocked above for *.mp4).
+  for (const f of readdirSync(dir)) {
+    try { unlinkSync(join(dir, f)); } catch { /* best effort */ }
+  }
+  try { rmdirSync(dir); } catch { /* best effort */ }
+});
+
+describe("LocalMusicProvider: source video cannot be deleted after extraction (#149)", () => {
+  it.runIf(have)("keeps the original container AND its real size, not the extracted size", async () => {
+    const src = join(dir, "fixture.mp4");
+    const r = spawnSync(ffmpeg!, [
+      "-y", "-hide_banner", "-loglevel", "error",
+      "-f", "lavfi", "-i", "testsrc=s=320x240:r=25:d=3",
+      "-f", "lavfi", "-i", "sine=f=440:d=3",
+      "-c:v", "libx264", "-b:v", "800k", "-c:a", "aac", "-shortest", src,
+    ], { stdio: "ignore" });
+    expect(r.status).toBe(0);
+
+    const bytes = readFileSync(src);
+    unlinkSync(src); // uploadAudio writes its own copy under a uuid name
+
+    const p = new LocalMusicProvider(dir);
+    const song = await p.uploadAudio({
+      buffer: bytes, originalName: "fixture.mp4", mimeType: "video/mp4",
+    });
+
+    const resolved = await p.getSongUrl(song.id);
+    expect(resolved).not.toBeNull();
+
+    // Fell back to the original container — the extract was discarded.
+    expect(resolved!.url.endsWith(".mp4")).toBe(true);
+    expect(existsSync(resolved!.url)).toBe(true);
+    expect(existsSync(resolved!.url.replace(/\.mp4$/, ".m4a"))).toBe(false);
+    expect(existsSync(resolved!.url.replace(/\.mp4$/, ".mka"))).toBe(false);
+
+    const onDisk = statSync(resolved!.url).size;
+    expect(onDisk).toBe(bytes.length);
+
+    // The RECORDED size drives the quota (totalBytes()), so it must describe
+    // the file actually retained. It is not exposed through search()/toSong,
+    // but it is persisted to index.json — read it back from there.
+    const record = (JSON.parse(readFileSync(join(dir, "index.json"), "utf8")) as Array<{
+      id: string; size: number; filePath: string;
+    }>).find((r) => r.id === song.id);
+    expect(record).toBeDefined();
+    expect(record!.filePath.endsWith(".mp4")).toBe(true);
+    // Before the fix this was the (much smaller) .mka size while the whole
+    // .mp4 stayed on disk, so the quota under-counted the retained bytes.
+    expect(record!.size).toBe(bytes.length);
+
+    // Sanity: the extract really is much smaller, so a wrong commit order
+    // would have been clearly observable rather than a rounding error.
+    expect(onDisk).toBeGreaterThan(50_000);
+  }, 60000);
+});
@@ -1,8 +1,11 @@
 import { describe, it, expect, beforeEach, afterEach } from "vitest";
-import { mkdtempSync, rmSync, existsSync, writeFileSync } from "node:fs";
+import { mkdtempSync, rmSync, existsSync, writeFileSync, readFileSync, readdirSync, statSync } from "node:fs";
+import { spawnSync } from "node:child_process";
+import { createRequire } from "node:module";
+import { buildFfmpegArgs } from "../audio/player.js";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { LocalMusicProvider } from "./local.js";
+import { LocalMusicProvider, parseMediaProbe } from "./local.js";

 let dir: string;

@@ -149,6 +152,115 @@ describe("LocalMusicProvider upload validation", () => {
      p.uploadAudio({ buffer: Buffer.alloc(0), originalName: "a.mp3" }),
    ).rejects.toThrow();
  });
+
+  // #149: video containers are accepted; only their audio track is kept.
+  it("still rejects a non-media extension after video was allowed", async () => {
+    const p = new LocalMusicProvider(dir);
+    for (const name of ["evil.exe", "evil.html", "evil.mp4.txt", "notes.pdf"]) {
+      await expect(
+        p.uploadAudio({ buffer: Buffer.from("x"), originalName: name, mimeType: "video/mp4" }),
+      ).rejects.toThrow();
+    }
+  });
+
+  it("accepts every supported video extension at the extension gate", async () => {
+    const p = new LocalMusicProvider(dir);
+    // Junk content: ffmpeg cannot open it, so it is "unrecognised" rather than
+    // "no audio track" and must be accepted exactly like a truncated .mp3
+    // always has been. The extension allowlist is what is under test here.
+    // .m4v is excluded on purpose — see the next test.
+    for (const ext of [".mp4", ".mov", ".avi", ".mkv", ".flv", ".wmv", ".mpg", ".mpeg", ".3gp", ".ts", ".m2ts", ".ogv"]) {
+      const song = await p.uploadAudio({
+        buffer: Buffer.from("not really a video"),
+        originalName: `clip${ext}`,
+        mimeType: "video/mp4",
+      });
+      expect(song.platform).toBe("local");
+      expect(song.name).toBe("clip");
+    }
+  });
+
+  it("refuses a .m4v raw video elementary stream, which by definition has no audio", async () => {
+    // .m4v is not a container — ffmpeg's rawvideo demuxer opens arbitrary
+    // bytes as an MPEG-4 video elementary stream, so it IS recognised and
+    // genuinely carries no audio track. Refusing it is the correct outcome,
+    // and it is the one case that distinguishes `recognized` from `probed`.
+    const p = new LocalMusicProvider(dir);
+    await expect(
+      p.uploadAudio({
+        buffer: Buffer.from("not really a video"),
+        originalName: "clip.m4v",
+        mimeType: "video/x-m4v",
+      }),
+    ).rejects.toThrow(/音轨/);
+  });
+
+  it("the error message names both audio and video formats", async () => {
+    const p = new LocalMusicProvider(dir);
+    await expect(
+      p.uploadAudio({ buffer: Buffer.from("x"), originalName: "a.exe" }),
+    ).rejects.toThrow(/视频/);
+  });
+});
+
+describe("parseMediaProbe (#149)", () => {
+  const mp4Banner = `Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'clip.mp4':
+  Duration: 00:03:27.15, start: 0.000000, bitrate: 1105 kb/s
+  Stream #0:0[0x1](und): Video: h264 (High), yuv420p, 1280x720, 30 fps
+  Stream #0:1[0x2](und): Audio: aac (LC), 48000 Hz, stereo, fltp, 192 kb/s`;
+
+  it("reads duration and detects the audio stream in a video container", () => {
+    const r = parseMediaProbe(mp4Banner);
+    expect(r.durationSeconds).toBe(3 * 60 + 27);
+    expect(r.hasAudio).toBe(true);
+  });
+
+  it("reports hasAudio false for a video with only a video stream", () => {
+    const silent = `Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'silent.mp4':
+  Duration: 00:00:02.00, start: 0.000000, bitrate: 29 kb/s
+  Stream #0:0[0x1](und): Video: h264 (High 4:4:4 Predictive), yuv444p, 160x120, 10 fps`;
+    const r = parseMediaProbe(silent);
+    expect(r.durationSeconds).toBe(2);
+    expect(r.hasAudio).toBe(false);
+  });
+
+  it("detects a plain audio file", () => {
+    const r = parseMediaProbe(`Input #0, mp3, from 'a.mp3':
+  Duration: 00:00:30.02, start: 0.000000, bitrate: 128 kb/s
+  Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 128 kb/s`);
+    expect(r.durationSeconds).toBe(30);
+    expect(r.hasAudio).toBe(true);
+  });
+
+  it("does not mistake an attached cover image for an audio stream", () => {
+    const r = parseMediaProbe(`Input #0, mp3, from 'cover.mp3':
+  Duration: 00:00:10.00, start: 0.000000, bitrate: 130 kb/s
+  Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 128 kb/s
+  Stream #0:1: Video: mjpeg (Baseline), yuvj420p(pc), 100x100 [attached pic]`);
+    expect(r.hasAudio).toBe(true);
+  });
+
+  it("returns zeros on unparseable output rather than throwing", () => {
+    const r = parseMediaProbe("ffmpeg: command exploded");
+    expect(r.durationSeconds).toBe(0);
+    expect(r.hasAudio).toBe(false);
+    expect(r.recognized).toBe(false);
+  });
+
+  // The distinction that decides whether an upload is refused: ffmpeg opened
+  // the file and found no audio (refuse) vs ffmpeg could not open it at all
+  // (accept, as it always has for truncated audio).
+  it("marks a readable container recognized and unreadable bytes not", () => {
+    expect(parseMediaProbe(mp4Banner).recognized).toBe(true);
+    expect(parseMediaProbe(`[mov,mp4,m4a,3gp,3g2,mj2 @ 0x1] moov atom not found
+[in#0 @ 0x2] Error opening input: Invalid data found when processing input
+Error opening input file junk.mp4.`).recognized).toBe(false);
+  });
+
+  it("rounds fractional durations", () => {
+    expect(parseMediaProbe("Duration: 00:00:03.60,").durationSeconds).toBe(4);
+    expect(parseMediaProbe("Duration: 01:02:03.10,").durationSeconds).toBe(3723);
+  });
 });

 describe("LocalMusicProvider quota", () => {
@@ -233,3 +345,146 @@ describe("LocalMusicProvider filename handling", () => {
    expect(await p.getSongUrl(song.id)).not.toBeNull();
  });
 });
+
+// #149 end-to-end: build real containers with the bundled ffmpeg and push
+// them through the actual upload path. Skipped automatically if the binary is
+// unavailable, so the suite still runs on a machine without it.
+describe("LocalMusicProvider video upload, end to end (#149)", () => {
+  const ffmpeg: string | null = (() => {
+    try {
+      return createRequire(import.meta.url)("ffmpeg-static") as string;
+    } catch {
+      return null;
+    }
+  })();
+
+  const have = !!ffmpeg && spawnSync(ffmpeg, ["-version"], { stdio: "ignore" }).status === 0;
+
+  /** Render a real container into the temp dir and return its bytes. */
+  function render(name: string, args: string[]): Buffer {
+    const out = join(dir, name);
+    const r = spawnSync(ffmpeg!, ["-y", "-hide_banner", "-loglevel", "error", ...args, out], {
+      stdio: "ignore",
+    });
+    if (r.status !== 0) throw new Error(`fixture render failed: ${name}`);
+    const buf = readFileSync(out);
+    rmSync(out, { force: true }); // upload writes its own copy
+    return buf;
+  }
+
+  const withAudio = (dur: number, vcodec: string, acodec: string) => [
+    "-f", "lavfi", "-i", `testsrc=s=160x120:r=10:d=${dur}`,
+    "-f", "lavfi", "-i", `sine=f=440:d=${dur}`,
+    "-c:v", vcodec, "-c:a", acodec, "-shortest",
+  ];
+
+  it.runIf(have)("accepts an mp4, reads its duration, and keeps only the audio", async () => {
+    const p = new LocalMusicProvider(dir);
+    const mp4 = render("src.mp4", withAudio(3, "libx264", "aac"));
+    const song = await p.uploadAudio({
+      buffer: mp4, originalName: "My Clip.mp4", mimeType: "video/mp4",
+    });
+
+    expect(song.name).toBe("My Clip");
+    expect(song.platform).toBe("local");
+    expect(song.duration).toBe(3);
+
+    const resolved = await p.getSongUrl(song.id);
+    expect(resolved).not.toBeNull();
+    // The video container is gone; what remains is the extracted audio track.
+    // AAC (what libx264+aac mp4s carry) goes to .m4a so the encoder-priming
+    // edit list survives — see extractedAudioExt.
+    expect(resolved!.url.endsWith(".m4a")).toBe(true);
+    expect(existsSync(join(dir, `${song.id}.mp4`))).toBe(false);
+    expect(existsSync(resolved!.url)).toBe(true);
+    expect(statSync(resolved!.url).size).toBeGreaterThan(0);
+    expect(statSync(resolved!.url).size).toBeLessThan(mp4.length);
+  }, 60000);
+
+  it.runIf(have)("extracted audio is still decodable by the player's ffmpeg args", async () => {
+    const p = new LocalMusicProvider(dir);
+    const song = await p.uploadAudio({
+      buffer: render("src2.mp4", withAudio(2, "libx264", "aac")),
+      originalName: "clip.mp4",
+      mimeType: "video/mp4",
+    });
+    const url = (await p.getSongUrl(song.id))!.url;
+
+    const decoded = spawnSync(
+      ffmpeg!,
+      [...buildFfmpegArgs(url, 0).slice(0, -1), "-"],
+      { maxBuffer: 64 * 1024 * 1024 },
+    );
+    expect(decoded.status).toBe(0);
+    // 2s of 48 kHz stereo s16le ≈ 384000 bytes; allow codec priming slack.
+    expect(decoded.stdout.length).toBeGreaterThan(300000);
+  }, 60000);
+
+  it.runIf(have)("aac extraction decodes bit-for-bit identically to the audio inside the video", async () => {
+    // The strongest statement of "lossless": decode the audio track straight
+    // out of the source mp4, decode the stored extract, compare the PCM.
+    // A Matroska remux would NOT pass this — it loses the MP4 edit list that
+    // discards AAC encoder priming, so it decodes ~23 ms longer.
+    const p = new LocalMusicProvider(dir);
+    const bytes = render("bitexact.mp4", withAudio(4, "libx264", "aac"));
+    const sourceCopy = join(dir, "source-kept.mp4");
+    writeFileSync(sourceCopy, bytes);
+
+    const song = await p.uploadAudio({
+      buffer: bytes, originalName: "bitexact.mp4", mimeType: "video/mp4",
+    });
+    const url = (await p.getSongUrl(song.id))!.url;
+
+    const toPcm = (input: string, pre: string[] = []) => spawnSync(
+      ffmpeg!,
+      ["-hide_banner", "-loglevel", "error", "-i", input, ...pre,
+       "-f", "s16le", "-ar", "48000", "-ac", "2", "-acodec", "pcm_s16le", "-"],
+      { maxBuffer: 128 * 1024 * 1024 },
+    );
+
+    const fromVideo = toPcm(sourceCopy, ["-vn", "-map", "0:a:0"]);
+    const fromExtract = toPcm(url);
+    expect(fromVideo.status).toBe(0);
+    expect(fromExtract.status).toBe(0);
+    expect(fromExtract.stdout.length).toBe(fromVideo.stdout.length);
+    expect(fromExtract.stdout.equals(fromVideo.stdout)).toBe(true);
+  }, 90000);
+
+  it.runIf(have)("refuses a video that genuinely has no audio track", async () => {
+    const p = new LocalMusicProvider(dir);
+    const silent = render("silent.mp4", [
+      "-f", "lavfi", "-i", "testsrc=s=160x120:r=10:d=2", "-an",
+    ]);
+    await expect(
+      p.uploadAudio({ buffer: silent, originalName: "silent.mp4", mimeType: "video/mp4" }),
+    ).rejects.toThrow(/音轨/);
+    // The rejected upload must not leave its bytes behind.
+    expect(readdirSync(dir).filter((f) => f.endsWith(".mp4"))).toEqual([]);
+  }, 60000);
+
+  it.runIf(have)("extracts losslessly from avi/mkv/flv too, not just mp4", async () => {
+    const p = new LocalMusicProvider(dir);
+    const cases: Array<[string, string[]]> = [
+      ["a.avi", withAudio(2, "mpeg4", "libmp3lame")],
+      ["a.mkv", withAudio(2, "libx264", "libopus")],
+      ["a.flv", withAudio(2, "flv", "libmp3lame")],
+    ];
+    for (const [name, args] of cases) {
+      const song = await p.uploadAudio({
+        buffer: render(`src-${name}`, args), originalName: name, mimeType: "video/x-msvideo",
+      });
+      const url = (await p.getSongUrl(song.id))!.url;
+      expect(url.endsWith(".mka")).toBe(true);
+      expect(statSync(url).size).toBeGreaterThan(0);
+    }
+  }, 120000);
+
+  it.runIf(have)("a plain audio upload is untouched — no extraction, original extension kept", async () => {
+    const p = new LocalMusicProvider(dir);
+    const mp3 = render("src.mp3", ["-f", "lavfi", "-i", "sine=f=440:d=2", "-c:a", "libmp3lame"]);
+    const song = await p.uploadAudio({ buffer: mp3, originalName: "tune.mp3", mimeType: "audio/mpeg" });
+    const url = (await p.getSongUrl(song.id))!.url;
+    expect(url.endsWith(".mp3")).toBe(true);
+    expect(statSync(url).size).toBe(mp3.length); // byte-identical, not remuxed
+  }, 60000);
+});
@@ -1,5 +1,5 @@
 import { spawn } from "node:child_process";
-import { existsSync, mkdirSync, readFileSync, rmSync, writeFileSync } from "node:fs";
+import { existsSync, mkdirSync, readFileSync, rmSync, statSync, writeFileSync } from "node:fs";
 import { createRequire } from "node:module";
 import path from "node:path";
 import crypto from "node:crypto";
@@ -34,6 +34,56 @@ const AUDIO_EXTENSIONS = new Set([
  ".ape",
 ]);

+/** Video containers accepted for upload (#149). Only the audio track is ever
+ *  used — the bot has no video output. Playback would work straight from the
+ *  container (ffmpeg selects the audio stream), but we extract the audio on
+ *  upload so a 200 MB clip does not sit on disk for a 3 MB song; see
+ *  extractAudioTrack. `.webm` is deliberately absent: it is already in
+ *  AUDIO_EXTENSIONS and both audio-only and video .webm are handled there. */
+const VIDEO_EXTENSIONS = new Set([
+  ".mp4",
+  ".mov",
+  ".avi",
+  ".mkv",
+  ".flv",
+  ".wmv",
+  ".m4v",
+  ".mpg",
+  ".mpeg",
+  ".3gp",
+  ".ts",
+  ".m2ts",
+  ".ogv",
+]);
+
+/** Fallback container for an extracted audio track. Matroska takes
+ *  essentially any audio codec, so `-c:a copy` works without knowing what the
+ *  source used — no re-encode, no codec/extension table. */
+const EXTRACTED_AUDIO_EXT = ".mka";
+
+/**
+ * Container to remux an extracted track into, chosen by its codec.
+ *
+ * AAC gets .m4a rather than the Matroska fallback. MP4 stores the AAC encoder
+ * priming (the ~1000 warm-up samples every AAC encoder emits) in an edit list,
+ * and that edit list does NOT survive into Matroska — so an aac→.mka remux
+ * decodes ~23 ms longer than the source, with the priming samples audible at
+ * the head instead of discarded. Measured: −66 dBFS, i.e. inaudible, but the
+ * track is then fractionally out of step with its own reported duration for
+ * no reason. Copying aac into .m4a keeps the edit list and decodes
+ * byte-for-byte identical to the audio inside the original video.
+ *
+ * AAC is worth special-casing because it is what mp4 / mov / m4v — the
+ * formats people actually upload — almost always carry.
+ */
+function extractedAudioExt(codec: string | null): string {
+  return codec === "aac" ? ".m4a" : EXTRACTED_AUDIO_EXT;
+}
+
+function isSupportedUploadExt(ext: string): boolean {
+  return AUDIO_EXTENSIONS.has(ext) || VIDEO_EXTENSIONS.has(ext);
+}
+
 const DEFAULT_MAX_FILES = 200;
 const DEFAULT_MAX_TOTAL_BYTES = 5 * 1024 * 1024 * 1024; // 5 GiB

@@ -71,39 +121,130 @@ function titleFromFileName(name: string): string {
  return safeFileName(name).replace(/\.[^.]+$/, "") || "本地音频";
 }

-async function probeDurationSeconds(filePath: string): Promise<number> {
+export interface MediaProbe {
+  /** Rounded seconds, 0 when the probe failed or the container has no duration. */
+  durationSeconds: number;
+  /** True when ffmpeg reported at least one audio stream. Only meaningful
+   *  together with `recognized` — see the comment there. */
+  hasAudio: boolean;
+  /** Lowercased codec name of the first audio stream ("aac", "mp3", "opus",
+   *  …), or null when there is none. Picks the remux container. */
+  audioCodec: string | null;
+  /**
+   * True when ffmpeg actually opened the container and printed its
+   * `Input #0, <format>, from '...'` header.
+   *
+   * This is what separates "ffmpeg looked inside and there is genuinely no
+   * audio track" from "ffmpeg could not make sense of these bytes at all".
+   * Both produce hasAudio === false, but only the first is a file we should
+   * refuse. Unreadable bytes have always been accepted here (a truncated mp3
+   * uploads fine and simply reports duration 0), and that stays true.
+   */
+  recognized: boolean;
+  /** False when ffmpeg could not be run or timed out, so nothing else in this
+   *  object is meaningful and the caller must not reject the file on it. */
+  probed: boolean;
+}
+
+/** Parse `Duration: HH:MM:SS.ss`, the `Input #0,` header and
+ *  `Stream #0:N...: Audio:` out of the banner ffmpeg prints on stderr when
+ *  asked to open a file with no output. */
+export function parseMediaProbe(stderr: string): Omit<MediaProbe, "probed"> {
+  const match = stderr.match(/Duration:\s*(\d+):(\d+):(\d+(?:\.\d+)?)/);
+  let durationSeconds = 0;
+  if (match) {
+    const total = Number(match[1]) * 3600 + Number(match[2]) * 60 + Number(match[3]);
+    durationSeconds = Number.isFinite(total) ? Math.round(total) : 0;
+  }
+  // e.g. "  Stream #0:1[0x2](und): Audio: aac (LC) ..." — the stream index and
+  // the bracketed id/language vary, so match on the "Audio:" tag itself. An
+  // embedded cover image is a separate "Video: mjpeg ... [attached pic]" line
+  // and never matches this.
+  const audioMatch = stderr.match(/Stream #\d+:\d+[^\n]*:\s*Audio:\s*([A-Za-z0-9_]+)/);
+  const hasAudio = audioMatch !== null;
+  const audioCodec = audioMatch ? audioMatch[1].toLowerCase() : null;
+  // "Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'clip.mp4':" — absent entirely
+  // when ffmpeg bails with "Error opening input: Invalid data found ...".
+  const recognized = /^Input #\d+,/m.test(stderr);
+  return { durationSeconds, hasAudio, audioCodec, recognized };
+}
+
+async function probeMedia(filePath: string): Promise<MediaProbe> {
  return new Promise((resolve) => {
    const ffmpeg = spawn(ffmpegPath || "ffmpeg", ["-hide_banner", "-i", filePath], {
      stdio: ["ignore", "ignore", "pipe"],
    });
    let stderr = "";
+    let settled = false;
+    const done = (probe: MediaProbe) => {
+      if (settled) return;
+      settled = true;
+      resolve(probe);
+    };
+    // Video containers are much larger than the audio files this used to see,
+    // and the probe only reads headers — but a network/USB path can still be
+    // slow, so allow more than the old 5s before giving up.
    const timeout = setTimeout(() => {
      ffmpeg.kill("SIGKILL");
-      resolve(0);
-    }, 5000);
+      done({ durationSeconds: 0, hasAudio: false, audioCodec: null, recognized: false, probed: false });
+    }, 20000);
    ffmpeg.stderr.on("data", (chunk) => {
      stderr += chunk.toString("utf8");
    });
    ffmpeg.on("error", () => {
      clearTimeout(timeout);
-      resolve(0);
+      done({ durationSeconds: 0, hasAudio: false, audioCodec: null, recognized: false, probed: false });
    });
    ffmpeg.on("close", () => {
      clearTimeout(timeout);
-      const match = stderr.match(/Duration:\s*(\d+):(\d+):(\d+(?:\.\d+)?)/);
-      if (!match) {
-        resolve(0);
-        return;
-      }
-      const hours = Number(match[1]);
-      const minutes = Number(match[2]);
-      const seconds = Number(match[3]);
-      const total = hours * 3600 + minutes * 60 + seconds;
-      resolve(Number.isFinite(total) ? Math.round(total) : 0);
+      done({ ...parseMediaProbe(stderr), probed: true });
    });
  });
 }

+/**
+ * Remux the first audio stream of `source` into `target` (#149).
+ *
+ * `-c:a copy` — the audio is moved bit-for-bit into a Matroska audio
+ * container, so this is fast, lossless, and codec-agnostic. Nothing is
+ * re-encoded, so a 200 MB .mp4 becomes a few MB .mka with the original audio
+ * intact. Video, subtitle and data streams are dropped.
+ *
+ * Returns true only if ffmpeg exited 0 AND produced a non-empty file, so a
+ * partial/zero-byte result can never be mistaken for a successful extraction.
+ * Callers fall back to keeping the original container, which plays fine.
+ */
+async function extractAudioTrack(source: string, target: string): Promise<boolean> {
+  const ok = await new Promise<boolean>((resolve) => {
+    const ffmpeg = spawn(
+      ffmpegPath || "ffmpeg",
+      ["-hide_banner", "-loglevel", "error", "-y", "-i", source,
+       "-vn", "-sn", "-dn", "-map", "0:a:0", "-c:a", "copy", target],
+      { stdio: ["ignore", "ignore", "ignore"] },
+    );
+    let settled = false;
+    const done = (v: boolean) => {
+      if (settled) return;
+      settled = true;
+      resolve(v);
+    };
+    // Remuxing is I/O bound, but a multi-GB input on a slow disk still takes
+    // a while. Cap it so a pathological file cannot wedge the upload request.
+    const timeout = setTimeout(() => {
+      ffmpeg.kill("SIGKILL");
+      done(false);
+    }, 120000);
+    ffmpeg.on("error", () => { clearTimeout(timeout); done(false); });
+    ffmpeg.on("close", (code) => { clearTimeout(timeout); done(code === 0); });
+  });
+  if (!ok) return false;
+  try {
+    return statSync(target).size > 0;
+  } catch {
+    return false;
+  }
+}
+
 export class LocalMusicProvider implements MusicProvider {
  readonly platform = "local" as const;
  private readonly uploadDir: string;
@@ -171,33 +312,91 @@ export class LocalMusicProvider implements MusicProvider {
    const ext = path.extname(originalName).toLowerCase();
    // Validate by the (sanitised) file extension only — never trust the
    // client-supplied Content-Type. This also guarantees the STORED extension
-    // is one of the known audio types, so a spoofed header cannot persist an
-    // arbitrary-extension blob on disk.
-    if (!AUDIO_EXTENSIONS.has(ext)) {
-      throw new Error("只支持常见音频文件，如 mp3、flac、wav、m4a、ogg、opus、aac、webm 等");
+    // is one of the known audio/video types, so a spoofed header cannot
+    // persist an arbitrary-extension blob on disk.
+    if (!isSupportedUploadExt(ext)) {
+      throw new Error(
+        "只支持常见音频文件（mp3、flac、wav、m4a、ogg、opus、aac、webm 等）" +
+        "和视频文件（mp4、mov、avi、mkv、flv、wmv 等，仅取其中的音轨播放）",
+      );
    }
    if (!input.buffer || input.buffer.length === 0) {
      throw new Error("上传文件为空");
    }

    const id = crypto.randomUUID();
-    const storedName = `${id}${ext}`;
-    const filePath = path.join(this.uploadDir, storedName);
+    const isVideo = VIDEO_EXTENSIONS.has(ext);
+    let filePath = path.join(this.uploadDir, `${id}${ext}`);
    writeFileSync(filePath, input.buffer);

-    const duration = await probeDurationSeconds(filePath);
+    let probe: MediaProbe;
+    try {
+      probe = await probeMedia(filePath);
+    } catch {
+      probe = { durationSeconds: 0, hasAudio: false, audioCodec: null, recognized: false, probed: false };
+    }
+
+    // Reject a video with no audio track up front (#149). Left to playback it
+    // would produce a silent, zero-byte stream that just looks like a broken
+    // song. Require `recognized` as well as `probed`: bytes ffmpeg cannot open
+    // at all report hasAudio false for a different reason, and those have
+    // always been accepted (a truncated upload lands with duration 0) — this
+    // change must not start rejecting them.
+    if (isVideo && probe.probed && probe.recognized && !probe.hasAudio) {
+      rmSync(filePath, { force: true });
+      throw new Error("这个视频里没有音轨，无法播放");
+    }
+
+    let size = input.buffer.length;
+    if (isVideo) {
+      // Keep only the audio. The video bytes are dead weight against the
+      // upload-directory quota and would never be used.
+      // Preferred container first; if that remux fails (a codec the container
+      // will not take), retry into Matroska, which takes almost anything.
+      const preferredExt = extractedAudioExt(probe.audioCodec);
+      let extracted = path.join(this.uploadDir, `${id}${preferredExt}`);
+      let ok = await extractAudioTrack(filePath, extracted);
+      if (!ok && preferredExt !== EXTRACTED_AUDIO_EXT) {
+        rmSync(extracted, { force: true });
+        extracted = path.join(this.uploadDir, `${id}${EXTRACTED_AUDIO_EXT}`);
+        ok = await extractAudioTrack(filePath, extracted);
+      }
+      if (ok) {
+        try {
+          // Commit filePath and size TOGETHER, and only after the source is
+          // actually gone. rmSync(force) still throws EBUSY/EPERM on Windows,
+          // and assigning size first would leave the record claiming the
+          // small extracted size while still pointing at the whole video —
+          // which makes totalBytes() under-count and lets the upload
+          // directory grow past its quota.
+          const extractedSize = statSync(extracted).size;
+          rmSync(filePath, { force: true });
+          filePath = extracted;
+          size = extractedSize;
+        } catch {
+          // Could not stat/remove (Windows lock) — keep playing the original
+          // container and drop the half-finished extract.
+          rmSync(extracted, { force: true });
+        }
+      } else {
+        // Extraction failed (exotic codec Matroska won't take, timeout, …).
+        // The original container still plays: ffmpeg picks its audio stream.
+        rmSync(extracted, { force: true });
+      }
+    }
+
    const song: LocalSongRecord = {
      id,
      name: titleFromFileName(originalName),
      artist: "本地上传",
      album: "本地音乐",
-      duration,
+      duration: probe.durationSeconds,
      coverUrl: "",
      platform: "local",
      filePath,
      originalName,
      uploadedAt: new Date().toISOString(),
-      size: input.buffer.length,
+      size,
      mimeType: input.mimeType || "application/octet-stream",
    };

@@ -1,4 +1,4 @@
-import { describe, it, expect, vi } from "vitest";
+import { afterEach, describe, it, expect, vi } from "vitest";
 import pino from "pino";
 import { TS3Client } from "./client.js";

@@ -83,3 +83,59 @@ describe("TS3Client.getClientServerGroups — live query + parse smoke test", ()
    expect(await ts.getClientServerGroups(5)).toEqual([]);
  });
 });
+
+describe("TS3Client stable identity UID", () => {
+  it("derives the same client UID after exporting and restoring an identity", () => {
+    const first = makeClient();
+    const restored = new TS3Client(
+      {
+        host: "localhost",
+        port: 9987,
+        queryPort: 10011,
+        nickname: "RestoredBot",
+        identity: first.getIdentityExport(),
+      },
+      pino({ level: "silent" }),
+    );
+
+    expect(first.getClientUid()).toBeTruthy();
+    expect(restored.getClientUid()).toBe(first.getClientUid());
+  });
+});
+
+type VisibleUidHarness = {
+  visibleClientUids: Map<number, string>;
+  rememberVisibleClientUid(clientId: number, clientUid: string): void;
+  releaseVisibleClientUid(clientId: number): void;
+  clearVisibleClientUids(): void;
+};
+
+describe("TS3Client visible client UID grace", () => {
+  afterEach(() => vi.useRealTimers());
+
+  it("retains a leaving client's UID for final reordered voice packets", () => {
+    vi.useFakeTimers();
+    const cache = makeClient() as unknown as VisibleUidHarness;
+    cache.rememberVisibleClientUid(7, "managed-bot-uid=");
+
+    cache.releaseVisibleClientUid(7);
+    vi.advanceTimersByTime(999);
+    expect(cache.visibleClientUids.get(7)).toBe("managed-bot-uid=");
+
+    vi.advanceTimersByTime(1);
+    expect(cache.visibleClientUids.has(7)).toBe(false);
+  });
+
+  it("lets a new clientEnter overwrite a reused id and cancel stale cleanup", () => {
+    vi.useFakeTimers();
+    const cache = makeClient() as unknown as VisibleUidHarness;
+    cache.rememberVisibleClientUid(7, "old-managed-bot-uid=");
+    cache.releaseVisibleClientUid(7);
+
+    cache.rememberVisibleClientUid(7, "new-human-uid=");
+    vi.advanceTimersByTime(1_000);
+
+    expect(cache.visibleClientUids.get(7)).toBe("new-human-uid=");
+    cache.clearVisibleClientUids();
+  });
+});
@@ -3,6 +3,7 @@ import { Readable } from "node:stream";
 import {
  Client as TS3FullClient,
  generateIdentity as genTS3Identity,
+  getUidFromPublicKey,
  identityFromString,
  sendTextMessage,
  listChannels,
@@ -15,6 +16,7 @@ import {
  type ClientInfo,
  type ClientLeftViewEvent,
  type ClientMovedEvent,
+  type VoiceData,
  type FileUploadInfo,
 } from "@honeybbq/teamspeak-client";
 import type { Logger } from "../logger.js";
@@ -23,6 +25,10 @@ import {
  type ServerProtocol,
 } from "./protocol-detect.js";
 import { TS6HttpQuery } from "./http-query.js";
+import {
+  TrackingVoiceEndpointResolver,
+  type ResolvedVoiceEndpoint,
+} from "./voice-endpoint.js";

 export { CODEC_OPUS_MUSIC } from "./voice.js";
 export type { ServerProtocol } from "./protocol-detect.js";
@@ -65,6 +71,20 @@ export interface TS3TextMessage {
  invokerGroups: string[]; // sender's TS server-group ids; [] when not in view cache
 }

+/** Lightweight voice-packet signal used for activity detection. The encoded
+ * payload is intentionally not forwarded beyond this protocol wrapper. */
+export interface TS3VoiceActivity {
+  clientId: number;
+  codec: number;
+  /** Stable TeamSpeak identity when the sender is present in the client view. */
+  clientUid?: string;
+}
+
+// Command notifications and UDP voice packets can be reordered in flight.
+// Retain a leaving client's UID briefly so its final packet is still
+// attributable; a new clientEnter for the same id cancels and overwrites it.
+const VISIBLE_CLIENT_UID_RELEASE_GRACE_MS = 1_000;
+
 /**
 * Map the library's TextMessage to our wrapper. Preserves invokerGroups (the
 * sender's TS server groups), which the library populates only when the sender
@@ -85,12 +105,19 @@ export function toTS3TextMessage(msg: TextMessage): TS3TextMessage {
 export class TS3Client extends EventEmitter {
  private client: TS3FullClient | null = null;
  private identity: Identity;
+  private readonly clientUid: string;
  private clientId = 0;
+  private readonly visibleClientUids = new Map<number, string>();
+  private readonly visibleClientUidReleaseTimers = new Map<
+    number,
+    ReturnType<typeof setTimeout>
+  >();
  private logger: Logger;
  private disconnecting = false;
  private detectedProtocol: ServerProtocol = "unknown";
  private httpQuery: TS6HttpQuery | null = null;
  private udpErrorTimer: ReturnType<typeof setTimeout> | null = null;
+  private readonly voiceEndpointResolver = new TrackingVoiceEndpointResolver();

  constructor(private options: TS3ClientOptions, logger: Logger) {
    super();
@@ -101,6 +128,7 @@ export class TS3Client extends EventEmitter {
    } else {
      this.identity = genTS3Identity(8);
    }
+    this.clientUid = getUidFromPublicKey(this.identity.publicKeyBase64());
  }

  /** The detected (or forced) server protocol after connect(). */
@@ -114,6 +142,8 @@ export class TS3Client extends EventEmitter {
  }

  async connect(): Promise<void> {
+    this.voiceEndpointResolver.reset();
+    this.clearVisibleClientUids();
    // Clean up any existing connection before creating a new one
    if (this.client) {
      this.logger.info("Cleaning up previous connection before reconnecting");
@@ -213,6 +243,7 @@ export class TS3Client extends EventEmitter {
      // Forward server password to the protocol library so it can be
      // included in clientinit for password-protected servers
      serverPassword: this.options.serverPassword,
+      resolver: this.voiceEndpointResolver,
      logger: {
        debug: (msg) => this.logger.debug(msg),
        info: (msg) => this.logger.info(msg),
@@ -222,16 +253,32 @@ export class TS3Client extends EventEmitter {
    });

    this.client.on("textMessage", (msg: TextMessage) => {
+      if (msg.invokerID === this.clientId) return;
      this.emit("textMessage", toTS3TextMessage(msg));
    });

+    this.client.on("voiceData", (voice: VoiceData) => {
+      // The library normally suppresses our own packets; retain the explicit
+      // guard so a future protocol change cannot make a bot duck itself.
+      if (voice.clientId === this.clientId) return;
+      const clientUid = this.visibleClientUids.get(voice.clientId);
+      const activity: TS3VoiceActivity = {
+        clientId: voice.clientId,
+        codec: voice.codec,
+        ...(clientUid ? { clientUid } : {}),
+      };
+      this.emit("voiceActivity", activity);
+    });
+
    this.client.on("disconnected", (err) => {
      this.logger.warn({ err: err?.message }, "Connection closed");
      this.clientId = 0;
+      this.clearVisibleClientUids();
      this.emit("disconnected");
    });

    this.client.on("clientEnter", (info: ClientInfo) => {
+      this.rememberVisibleClientUid(info.id, info.uid);
      this.logger.debug(
        { nickname: info.nickname, id: info.id },
        "Client entered"
@@ -240,6 +287,7 @@ export class TS3Client extends EventEmitter {
    });

    this.client.on("clientLeave", (ev: ClientLeftViewEvent) => {
+      this.releaseVisibleClientUid(ev.id);
      this.logger.debug({ id: ev.id }, "Client left");
      this.emit("clientLeave", ev);
    });
@@ -429,6 +477,52 @@ export class TS3Client extends EventEmitter {
    return this.clientId;
  }

+  /** Actual endpoint selected by the SDK's SRV/TSDNS discovery and DNS lookup. */
+  getResolvedVoiceEndpoint(): ResolvedVoiceEndpoint | null {
+    return this.voiceEndpointResolver.getEndpoint();
+  }
+
+  /** Stable identity of this managed TeamSpeak client. */
+  getClientUid(): string {
+    return this.clientUid;
+  }
+
+  private rememberVisibleClientUid(clientId: number, clientUid: string): void {
+    const pendingRelease = this.visibleClientUidReleaseTimers.get(clientId);
+    if (pendingRelease) clearTimeout(pendingRelease);
+    this.visibleClientUidReleaseTimers.delete(clientId);
+
+    if (clientId > 0 && clientUid) {
+      this.visibleClientUids.set(clientId, clientUid);
+    } else {
+      this.visibleClientUids.delete(clientId);
+    }
+  }
+
+  private releaseVisibleClientUid(clientId: number): void {
+    const clientUid = this.visibleClientUids.get(clientId);
+    if (!clientUid) return;
+
+    const previous = this.visibleClientUidReleaseTimers.get(clientId);
+    if (previous) clearTimeout(previous);
+    const timer = setTimeout(() => {
+      if (this.visibleClientUids.get(clientId) === clientUid) {
+        this.visibleClientUids.delete(clientId);
+      }
+      this.visibleClientUidReleaseTimers.delete(clientId);
+    }, VISIBLE_CLIENT_UID_RELEASE_GRACE_MS);
+    timer.unref?.();
+    this.visibleClientUidReleaseTimers.set(clientId, timer);
+  }
+
+  private clearVisibleClientUids(): void {
+    for (const timer of this.visibleClientUidReleaseTimers.values()) {
+      clearTimeout(timer);
+    }
+    this.visibleClientUidReleaseTimers.clear();
+    this.visibleClientUids.clear();
+  }
+
  disconnect(): void {
    if (this.client && !this.disconnecting) {
      this.disconnecting = true;
@@ -441,6 +535,7 @@ export class TS3Client extends EventEmitter {
      });
    }
    this.clientId = 0;
+    this.clearVisibleClientUids();
    this.httpQuery = null;
    this.detectedProtocol = "unknown";
    if (this.udpErrorTimer) {
@@ -0,0 +1,79 @@
+import { describe, expect, it, vi } from "vitest";
+import type { AddrResolver, ResolvedAddr } from "@honeybbq/teamspeak-client";
+import { TrackingVoiceEndpointResolver } from "./voice-endpoint.js";
+
+function result(addr: string): ResolvedAddr {
+  return { addr, source: "test", expiry: new Date(0) };
+}
+
+function delegate(...addresses: string[]): AddrResolver {
+  return {
+    resolve: vi.fn(async () => addresses.map(result)),
+  };
+}
+
+describe("TrackingVoiceEndpointResolver", () => {
+  it("pins a DNS alias to the IPv4 endpoint used by the UDP connection", async () => {
+    const resolveHost = vi.fn(async () => "203.0.113.20");
+    const resolver = new TrackingVoiceEndpointResolver(
+      delegate("voice-alias.example.com:9987"),
+      resolveHost,
+    );
+
+    const resolved = await resolver.resolve("voice.example.com:9987");
+
+    expect(resolveHost).toHaveBeenCalledWith("voice-alias.example.com");
+    expect(resolved[0]?.addr).toBe("203.0.113.20:9987");
+    expect(resolver.getEndpoint()).toEqual({ host: "203.0.113.20", port: 9987 });
+  });
+
+  it("preserves the port chosen by SRV/TSDNS discovery", async () => {
+    const resolver = new TrackingVoiceEndpointResolver(
+      delegate("srv-target.example.com:12000"),
+      async () => "198.51.100.8",
+    );
+
+    expect((await resolver.resolve("voice.example.com:9987"))[0]?.addr).toBe(
+      "198.51.100.8:12000",
+    );
+    expect(resolver.getEndpoint()?.port).toBe(12000);
+  });
+
+  it("keeps the SDK target as a safe fallback when A-record lookup fails", async () => {
+    const original = "voice.example.com:9987";
+    const resolver = new TrackingVoiceEndpointResolver(
+      delegate(original),
+      async () => {
+        throw new Error("dns unavailable");
+      },
+    );
+
+    expect((await resolver.resolve(original))[0]?.addr).toBe(original);
+    expect(resolver.getEndpoint()).toEqual({ host: "voice.example.com", port: 9987 });
+  });
+
+  it("does not mutate secondary SDK candidates", async () => {
+    const resolver = new TrackingVoiceEndpointResolver(
+      delegate("first.example.com:9987", "second.example.com:9988"),
+      async () => "192.0.2.4",
+    );
+
+    const resolved = await resolver.resolve("voice.example.com:9987");
+    expect(resolved.map((candidate) => candidate.addr)).toEqual([
+      "192.0.2.4:9987",
+      "second.example.com:9988",
+    ]);
+  });
+
+  it("clears the observed endpoint before a reconnect", async () => {
+    const resolver = new TrackingVoiceEndpointResolver(
+      delegate("voice.example.com:9987"),
+      async () => "192.0.2.5",
+    );
+    await resolver.resolve("voice.example.com:9987");
+
+    resolver.reset();
+
+    expect(resolver.getEndpoint()).toBeNull();
+  });
+});
@@ -0,0 +1,104 @@
+import { lookup } from "node:dns/promises";
+import { isIP } from "node:net";
+import { Resolver } from "@honeybbq/teamspeak-client/discovery";
+import type {
+  AddrResolver,
+  ResolvedAddr,
+} from "@honeybbq/teamspeak-client";
+
+export interface ResolvedVoiceEndpoint {
+  host: string;
+  port: number;
+}
+
+type ResolveIpv4 = (host: string) => Promise<string>;
+
+function parseVoiceAddress(address: string): ResolvedVoiceEndpoint | null {
+  let host: string;
+  let rawPort: string;
+
+  if (address.startsWith("[")) {
+    const closingBracket = address.indexOf("]");
+    if (closingBracket < 0 || address[closingBracket + 1] !== ":") return null;
+    host = address.slice(1, closingBracket);
+    rawPort = address.slice(closingBracket + 2);
+  } else {
+    const separator = address.lastIndexOf(":");
+    if (separator <= 0) return null;
+    host = address.slice(0, separator);
+    rawPort = address.slice(separator + 1);
+  }
+
+  const port = Number(rawPort);
+  if (
+    host.length === 0 ||
+    !Number.isInteger(port) ||
+    port < 1 ||
+    port > 65_535
+  ) {
+    return null;
+  }
+  return { host, port };
+}
+
+function formatVoiceAddress(endpoint: ResolvedVoiceEndpoint): string {
+  return endpoint.host.includes(":")
+    ? `[${endpoint.host}]:${endpoint.port}`
+    : `${endpoint.host}:${endpoint.port}`;
+}
+
+async function resolveIpv4(host: string): Promise<string> {
+  if (isIP(host) === 4) return host;
+  return (await lookup(host, { family: 4 })).address;
+}
+
+/**
+ * Uses the SDK's normal SRV/TSDNS discovery, then pins its selected hostname
+ * to the IPv4 address that the UDP connection will use. Besides making the
+ * connection target observable, this gives all bots a common registry scope
+ * when one is configured with a DNS alias and another with the underlying IP.
+ */
+export class TrackingVoiceEndpointResolver implements AddrResolver {
+  private endpoint: ResolvedVoiceEndpoint | null = null;
+
+  constructor(
+    private readonly delegate: AddrResolver = new Resolver(),
+    private readonly resolveHost: ResolveIpv4 = resolveIpv4,
+  ) {}
+
+  async resolve(input: string, signal?: AbortSignal): Promise<ResolvedAddr[]> {
+    this.endpoint = null;
+    const candidates = await this.delegate.resolve(input, signal);
+    const selected = candidates[0];
+    if (!selected) return candidates;
+
+    const parsed = parseVoiceAddress(selected.addr);
+    if (!parsed) return candidates;
+
+    try {
+      const pinned = {
+        host: await this.resolveHost(parsed.host),
+        port: parsed.port,
+      };
+      this.endpoint = pinned;
+      return [
+        { ...selected, addr: formatVoiceAddress(pinned) },
+        ...candidates.slice(1),
+      ];
+    } catch {
+      // Preserve the SDK's original target if local A-record resolution fails.
+      // The connection may still succeed through platform-specific resolution;
+      // the registry then falls back to the logical host + resolved port.
+      this.endpoint = parsed;
+      return candidates;
+    }
+  }
+
+  reset(): void {
+    this.endpoint = null;
+  }
+
+  getEndpoint(): ResolvedVoiceEndpoint | null {
+    return this.endpoint ? { ...this.endpoint } : null;
+  }
+}
@@ -13,21 +13,30 @@ import { createAvatarStore } from "../../data/avatars.js";
 import { createRequireAuth } from "../middleware/requireAuth.js";
 import { createPermissionStore } from "../../data/permissions.js";
 import { createBotRouter } from "./bot.js";
-import { getDefaultConfig, type BotConfig, type JellyfinConfig } from "../../data/config.js";
+import {
+  getDefaultConfig,
+  type BotConfig,
+  type JellyfinConfig,
+  type VoiceDuckingConfig,
+} from "../../data/config.js";
 import { SESSION_COOKIE_NAME } from "../auth/validateSession.js";
 import type { BotManager } from "../../bot/manager.js";

-/** Records every updateIdleTimeout / updateAutoPause call so the test can assert propagation. */
+/** Records live settings updates so the tests can assert per-bot propagation. */
 function makeFakeBot() {
  return {
    idleTimeoutCalls: [] as number[],
    autoPauseCalls: [] as boolean[],
+    voiceDuckingCalls: [] as VoiceDuckingConfig[],
    updateIdleTimeout(minutes: number) {
      this.idleTimeoutCalls.push(minutes);
    },
    updateAutoPause(enabled: boolean) {
      this.autoPauseCalls.push(enabled);
    },
+    updateVoiceDucking(settings: VoiceDuckingConfig) {
+      this.voiceDuckingCalls.push({ ...settings });
+    },
  };
 }

@@ -84,6 +93,60 @@ describe("bot router /settings", () => {
    expect(res.body.autoPauseOnEmpty).toBe(true);
  });

+  it("GET /settings includes voiceDucking with safe defaults", async () => {
+    const res = await request(app).get("/api/bot/settings").set("Cookie", cookie);
+    expect(res.status).toBe(200);
+    expect(res.body.voiceDucking).toEqual({ enabled: false, volumePercent: 30 });
+  });
+
+  it("POST /settings safely partial-merges, persists and hot-applies voiceDucking", async () => {
+    const enable = await request(app)
+      .post("/api/bot/settings")
+      .set("Cookie", cookie)
+      .send({ voiceDucking: { enabled: true } });
+    expect(enable.status).toBe(200);
+    expect(enable.body.voiceDucking).toEqual({ enabled: true, volumePercent: 30 });
+
+    const setVolume = await request(app)
+      .post("/api/bot/settings")
+      .set("Cookie", cookie)
+      .send({ voiceDucking: { volumePercent: 42.5 } });
+    expect(setVolume.status).toBe(200);
+    expect(config.voiceDucking).toEqual({ enabled: true, volumePercent: 42.5 });
+
+    for (const bot of fakeBots) {
+      expect(bot.voiceDuckingCalls).toEqual([
+        { enabled: true, volumePercent: 30 },
+        { enabled: true, volumePercent: 42.5 },
+      ]);
+    }
+
+    const persisted = JSON.parse(readFileSync(configPath, "utf-8"));
+    expect(persisted.voiceDucking).toEqual({ enabled: true, volumePercent: 42.5 });
+    const followUp = await request(app).get("/api/bot/settings").set("Cookie", cookie);
+    expect(followUp.body.voiceDucking).toEqual({ enabled: true, volumePercent: 42.5 });
+  });
+
+  it("POST /settings ignores malformed voiceDucking fields and non-object blocks", async () => {
+    config.voiceDucking = { enabled: true, volumePercent: 25 };
+    const invalidFields = await request(app)
+      .post("/api/bot/settings")
+      .set("Cookie", cookie)
+      .send({ voiceDucking: { enabled: "yes", volumePercent: 101 } });
+    expect(invalidFields.status).toBe(200);
+    expect(config.voiceDucking).toEqual({ enabled: true, volumePercent: 25 });
+
+    const arrayBlock = await request(app)
+      .post("/api/bot/settings")
+      .set("Cookie", cookie)
+      .send({ voiceDucking: [{ enabled: false, volumePercent: 0 }] });
+    expect(arrayBlock.status).toBe(200);
+    expect(config.voiceDucking).toEqual({ enabled: true, volumePercent: 25 });
+    for (const bot of fakeBots) {
+      expect(bot.voiceDuckingCalls).toEqual([{ enabled: true, volumePercent: 25 }]);
+    }
+  });
+
  it("POST /settings with autoPauseOnEmpty:false persists and propagates to bots", async () => {
    const res = await request(app)
      .post("/api/bot/settings")
@@ -325,6 +388,38 @@ describe("bot router /settings", () => {
    expect(res.status).toBe(200);
    expect(config.spotify).toEqual(before);
  });
+
+  it("GET /settings echoes savedQueuesEnabled + playKeepsQueue (default false)", async () => {
+    const res = await request(app).get("/api/bot/settings").set("Cookie", cookie);
+    expect(res.status).toBe(200);
+    expect(res.body.savedQueuesEnabled).toBe(false);
+    expect(res.body.playKeepsQueue).toBe(false);
+  });
+
+  it("POST /settings persists savedQueuesEnabled and playKeepsQueue", async () => {
+    const res = await request(app)
+      .post("/api/bot/settings")
+      .set("Cookie", cookie)
+      .send({ savedQueuesEnabled: true, playKeepsQueue: true });
+    expect(res.status).toBe(200);
+    expect(res.body.savedQueuesEnabled).toBe(true);
+    expect(res.body.playKeepsQueue).toBe(true);
+    expect(config.savedQueuesEnabled).toBe(true);
+    expect(config.playKeepsQueue).toBe(true);
+
+    const get = await request(app).get("/api/bot/settings").set("Cookie", cookie);
+    expect(get.body.savedQueuesEnabled).toBe(true);
+    expect(get.body.playKeepsQueue).toBe(true);
+  });
+
+  it("POST /settings ignores non-boolean savedQueuesEnabled without 400", async () => {
+    const res = await request(app)
+      .post("/api/bot/settings")
+      .set("Cookie", cookie)
+      .send({ savedQueuesEnabled: "nope" });
+    expect(res.status).toBe(200);
+    expect(config.savedQueuesEnabled).toBe(false); // unchanged from default
+  });
 });

 // Whole-branch I2: saving a Client ID in Settings must re-configure the single
@@ -647,4 +742,54 @@ describe("bot router /settings jellyfin block + enabledProviders", () => {
    // No jellyfin block in the request → no reconfigure call.
    expect(configureCalls).toHaveLength(0);
  });
+
+  // --- #126: operator-chosen default source ---
+
+  it("GET /settings exposes defaultPlatform (null by default)", async () => {
+    const res = await request(mountBot()).get("/api/bot/settings");
+    expect(res.status).toBe(200);
+    expect(res.body.defaultPlatform).toBeNull();
+  });
+
+  it("POST /settings sets an enabled defaultPlatform and persists it", async () => {
+    const res = await request(mountBot()).post("/api/bot/settings").send({
+      defaultPlatform: "bilibili",
+    });
+    expect(res.status).toBe(200);
+    expect(res.body.defaultPlatform).toBe("bilibili");
+    expect(config.defaultPlatform).toBe("bilibili");
+    const onDisk = JSON.parse(readFileSync(configPath, "utf-8"));
+    expect(onDisk.defaultPlatform).toBe("bilibili");
+  });
+
+  it("POST /settings ignores an unknown or disabled defaultPlatform", async () => {
+    const app = mountBot();
+    // jellyfin is opt-in and not enabled in the default config → rejected.
+    await request(app).post("/api/bot/settings").send({ defaultPlatform: "jellyfin" });
+    expect(config.defaultPlatform).toBeNull();
+    // Unknown value → rejected.
+    await request(app).post("/api/bot/settings").send({ defaultPlatform: "bogus" });
+    expect(config.defaultPlatform).toBeNull();
+  });
+
+  it("POST /settings clears defaultPlatform with null", async () => {
+    const app = mountBot();
+    await request(app).post("/api/bot/settings").send({ defaultPlatform: "qq" });
+    expect(config.defaultPlatform).toBe("qq");
+    const res = await request(app).post("/api/bot/settings").send({ defaultPlatform: null });
+    expect(res.body.defaultPlatform).toBeNull();
+    expect(config.defaultPlatform).toBeNull();
+  });
+
+  it("POST /settings drops a default whose source gets disabled in the same request", async () => {
+    const app = mountBot();
+    await request(app).post("/api/bot/settings").send({ defaultPlatform: "qq" });
+    expect(config.defaultPlatform).toBe("qq");
+    // Disabling qq via enabledProviders clears the now-invalid default.
+    const res = await request(app).post("/api/bot/settings").send({
+      enabledProviders: ["netease", "bilibili"],
+    });
+    expect(res.body.defaultPlatform).toBeNull();
+    expect(config.defaultPlatform).toBeNull();
+  });
 });
@@ -71,19 +71,30 @@ export function createBotRouter(
    res.json({
      idleTimeoutMinutes: config.idleTimeoutMinutes ?? 0,
      autoPauseOnEmpty: config.autoPauseOnEmpty,
+      voiceDucking: config.voiceDucking,
      localAudioEnabled: config.localAudioEnabled,
+      savedQueuesEnabled: config.savedQueuesEnabled,
+      playKeepsQueue: config.playKeepsQueue,
      adminGroups: config.adminGroups ?? [],
      guestMode: config.guestMode,
      spotify: maskedSpotify(),
      jellyfin: maskedJellyfin(),
      enabledProviders: config.enabledProviders,
+      defaultPlatform: config.defaultPlatform,
    });
  });

  // POST /api/bot/settings — 保存全局 bot 行为设置 (gated: changing global bot
  // behavior is a bot.manage operation, consistent with PR #80's permission model)
  router.post("/settings", requirePermission("bot.manage"), (req, res) => {
-    const { idleTimeoutMinutes, autoPauseOnEmpty, localAudioEnabled, guestMode, adminGroups } = req.body;
+    const {
+      idleTimeoutMinutes,
+      autoPauseOnEmpty,
+      localAudioEnabled,
+      voiceDucking,
+      guestMode,
+      adminGroups,
+    } = req.body;

    const hasIdle = idleTimeoutMinutes !== undefined;
    if (hasIdle && (typeof idleTimeoutMinutes !== "number" || idleTimeoutMinutes < 0)) {
@@ -98,6 +109,37 @@ export function createBotRouter(
    if (hasAutoPause) config.autoPauseOnEmpty = autoPauseOnEmpty;
    if (hasLocalAudioEnabled) config.localAudioEnabled = localAudioEnabled;

+    // Voice ducking is a partial settings block. Merge only known, strictly
+    // valid fields so malformed JSON cannot replace the object or inject NaN /
+    // out-of-range gain values into the live audio path.
+    const hasVoiceDucking =
+      voiceDucking !== null &&
+      typeof voiceDucking === "object" &&
+      !Array.isArray(voiceDucking);
+    if (hasVoiceDucking) {
+      if (typeof voiceDucking.enabled === "boolean") {
+        config.voiceDucking.enabled = voiceDucking.enabled;
+      }
+      if (
+        typeof voiceDucking.volumePercent === "number" &&
+        Number.isFinite(voiceDucking.volumePercent) &&
+        voiceDucking.volumePercent >= 0 &&
+        voiceDucking.volumePercent <= 100
+      ) {
+        config.voiceDucking.volumePercent = voiceDucking.volumePercent;
+      }
+    }
+
+    // Saved-queues + play-keeps-queue toggles (default off). Both read live from
+    // config by BotInstance / the saved-queues router, so no per-bot push needed;
+    // only a literal boolean mutates the stored value (junk is ignored).
+    if (typeof req.body.savedQueuesEnabled === "boolean") {
+      config.savedQueuesEnabled = req.body.savedQueuesEnabled;
+    }
+    if (typeof req.body.playKeepsQueue === "boolean") {
+      config.playKeepsQueue = req.body.playKeepsQueue;
+    }
+
    const hasGuestMode = guestMode !== undefined && guestMode !== null && typeof guestMode === "object";
    if (hasGuestMode) {
      const gm = config.guestMode;
@@ -175,6 +217,29 @@ export function createBotRouter(
      );
    }

+    // defaultPlatform (issue #126): the operator-chosen default source for
+    // platform-less commands/REST/WebUI calls. Reconciled AFTER enabledProviders
+    // so both are validated against the same (possibly updated) enabled list:
+    //   1) Drop a stored default that the new enabledProviders no longer allows,
+    //      keeping the persisted config consistent with loadConfig's invariant.
+    //   2) Apply an explicit change — `null`/`""` clears it (back to priority
+    //      order); a known+enabled provider sets it; anything else is ignored.
+    if (config.defaultPlatform && !config.enabledProviders.includes(config.defaultPlatform)) {
+      config.defaultPlatform = null;
+    }
+    if ("defaultPlatform" in req.body) {
+      const dp = req.body.defaultPlatform;
+      if (dp === null || dp === "") {
+        config.defaultPlatform = null;
+      } else if (
+        typeof dp === "string" &&
+        (GATEABLE_PROVIDERS as readonly string[]).includes(dp) &&
+        config.enabledProviders.includes(dp as GateableProvider)
+      ) {
+        config.defaultPlatform = dp as GateableProvider;
+      }
+    }
+
    saveConfig(configPath, config);

    // Hot-apply the (possibly re-pointed) Jellyfin connection to the live
@@ -208,17 +273,22 @@ export function createBotRouter(
    for (const bot of botManager.getAllBots()) {
      if (hasIdle) bot.updateIdleTimeout(config.idleTimeoutMinutes);
      if (hasAutoPause) bot.updateAutoPause(config.autoPauseOnEmpty);
+      if (hasVoiceDucking) bot.updateVoiceDucking(config.voiceDucking);
    }

    res.json({
      idleTimeoutMinutes: config.idleTimeoutMinutes ?? 0,
      autoPauseOnEmpty: config.autoPauseOnEmpty,
+      voiceDucking: config.voiceDucking,
      localAudioEnabled: config.localAudioEnabled,
+      savedQueuesEnabled: config.savedQueuesEnabled,
+      playKeepsQueue: config.playKeepsQueue,
      adminGroups: config.adminGroups ?? [],
      guestMode: config.guestMode,
      spotify: maskedSpotify(),
      jellyfin: maskedJellyfin(),
      enabledProviders: config.enabledProviders,
+      defaultPlatform: config.defaultPlatform,
    });
  });

@@ -1,10 +1,20 @@
-import { describe, it, expect, vi, beforeEach } from "vitest";
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
 import express from "express";
+import cookieParser from "cookie-parser";
 import request from "supertest";
 import pino from "pino";
+import { mkdtempSync, rmSync, readFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
 import type { MusicProvider, SearchResult } from "../../music/provider.js";
-import { getDefaultConfig, type BotConfig } from "../../data/config.js";
-import { createMusicRouter } from "./music.js";
+import { getDefaultConfig, loadConfig, type BotConfig } from "../../data/config.js";
+import { createDatabase, type BotDatabase } from "../../data/database.js";
+import { createUserStore } from "../../data/users.js";
+import { createSessionStore } from "../../data/sessions.js";
+import { createPermissionStore } from "../../data/permissions.js";
+import { createRequireAuth } from "../middleware/requireAuth.js";
+import { SESSION_COOKIE_NAME } from "../auth/validateSession.js";
+import { createMusicRouter, createLocalUploadBody } from "./music.js";

 const empty: SearchResult = { songs: [], albums: [], playlists: [] };

@@ -118,6 +128,25 @@ describe("music router provider gating (enabledProviders) + jellyfin endpoints",
    expect(res.body.enabled).not.toContain("spotify"); // spotify.enabled defaults off
  });

+  it("GET /providers reports a configured defaultPlatform override (#126)", async () => {
+    const config = getDefaultConfig();
+    config.defaultPlatform = "qq"; // operator prefers QQ over the priority order
+    const { app } = mount(config);
+    const res = await request(app).get("/api/music/providers");
+    expect(res.status).toBe(200);
+    expect(res.body.default).toBe("qq");
+  });
+
+  it("routes a platform-less /search to the configured defaultPlatform (#126)", async () => {
+    const config = getDefaultConfig();
+    config.defaultPlatform = "bilibili";
+    const { app, netease } = mount(config);
+    const res = await request(app).get("/api/music/search?q=hello");
+    expect(res.status).toBe(200);
+    // Default is now bilibili, so the netease provider must NOT be hit.
+    expect(netease.search).not.toHaveBeenCalled();
+  });
+
  /** Default config plus the opt-in jellyfin source enabled. */
  function configWithJellyfin() {
    const config = getDefaultConfig();
@@ -147,3 +176,330 @@ describe("music router provider gating (enabledProviders) + jellyfin endpoints",
    expect(res.status).toBe(401);
  });
 });
+
+describe("music router POST /quality — persistence (#125)", () => {
+  let tmpDir: string;
+  let configPath: string;
+  let config: BotConfig;
+  let botDb: BotDatabase;
+  let app: express.Express;
+  let cookie: string;
+  let providers: Record<string, MusicProvider>;
+
+  /** A provider whose in-memory quality is settable and readable, like the real
+   *  ones. */
+  function qualityProvider(platform: MusicProvider["platform"], initial: string): MusicProvider {
+    let q = initial;
+    return {
+      platform,
+      search: vi.fn().mockResolvedValue(empty),
+      getQuality: vi.fn(() => q),
+      setQuality: vi.fn((v: string) => { q = v; }),
+    } as unknown as MusicProvider;
+  }
+
+  /** Jellyfin only accepts its own tiers (mirrors the real provider), so a
+   *  broadcast of a foreign value is ignored — proving the snapshot captures each
+   *  provider's ACTUAL post-apply state, not just the request value. */
+  function jellyfinQualityProvider(): MusicProvider {
+    let q = "direct";
+    const tiers = new Set(["direct", "320", "192", "128"]);
+    return {
+      platform: "jellyfin",
+      search: vi.fn().mockResolvedValue(empty),
+      getQuality: vi.fn(() => q),
+      setQuality: vi.fn((v: string) => { if (tiers.has(v)) q = v; }),
+    } as unknown as MusicProvider;
+  }
+
+  beforeEach(async () => {
+    botDb = createDatabase(":memory:");
+    const users = createUserStore(botDb.db);
+    const sessions = createSessionStore(botDb.db);
+    const admin = await users.createUser("admin", "pw-admin", "admin");
+    cookie = `${SESSION_COOKIE_NAME}=${sessions.createSession(admin.id).token}`;
+
+    tmpDir = mkdtempSync(join(tmpdir(), "musicquality-"));
+    configPath = join(tmpDir, "config.json");
+    config = getDefaultConfig();
+
+    providers = {
+      netease: qualityProvider("netease", "exhigh"),
+      qq: qualityProvider("qq", "exhigh"),
+      bilibili: qualityProvider("bilibili", "high"),
+      kugou: qualityProvider("kugou", "128"),
+      jellyfin: jellyfinQualityProvider(),
+    };
+
+    app = express();
+    app.use(express.json());
+    app.use(cookieParser());
+    app.use("/api", createRequireAuth(sessions, createPermissionStore(botDb.db), () => getDefaultConfig().guestMode));
+    app.use(
+      "/api/music",
+      createMusicRouter(
+        providers.netease, providers.qq, providers.bilibili, pino({ level: "silent" }),
+        undefined, config, providers.kugou, undefined, providers.jellyfin, configPath,
+      ),
+    );
+  });
+
+  afterEach(() => {
+    botDb.close();
+    rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  it("persists a platform-specific quality change to config.json", async () => {
+    const res = await request(app)
+      .post("/api/music/quality")
+      .set("Cookie", cookie)
+      .send({ platform: "netease", quality: "lossless" });
+    expect(res.status).toBe(200);
+    expect(providers.netease.setQuality).toHaveBeenCalledWith("lossless");
+    // in-memory config mutated
+    expect(config.audioQuality.netease).toBe("lossless");
+    // written to disk + reload reflects it (survives a restart)
+    const onDisk = JSON.parse(readFileSync(configPath, "utf-8"));
+    expect(onDisk.audioQuality.netease).toBe("lossless");
+    expect(loadConfig(configPath).audioQuality.netease).toBe("lossless");
+  });
+
+  it("snapshots each provider's post-apply quality on a broadcast change", async () => {
+    const res = await request(app)
+      .post("/api/music/quality")
+      .set("Cookie", cookie)
+      .send({ quality: "320" });
+    expect(res.status).toBe(200);
+    // Broadcast reached every provider…
+    expect(providers.netease.setQuality).toHaveBeenCalledWith("320");
+    expect(providers.jellyfin.setQuality).toHaveBeenCalledWith("320");
+    // …and the snapshot reflects what each one actually accepted. Jellyfin's
+    // "320" is a valid tier here, so it takes; a foreign value would be ignored.
+    expect(config.audioQuality).toEqual({
+      netease: "320",
+      qq: "320",
+      bilibili: "320",
+      kugou: "320",
+      jellyfin: "320",
+    });
+  });
+
+  it("ignores foreign broadcast values that a provider rejects (jellyfin)", async () => {
+    const res = await request(app)
+      .post("/api/music/quality")
+      .set("Cookie", cookie)
+      .send({ quality: "lossless" });
+    expect(res.status).toBe(200);
+    // jellyfin rejects the NetEase-style value → stays at its default tier.
+    expect(config.audioQuality.jellyfin).toBe("direct");
+    expect(config.audioQuality.netease).toBe("lossless");
+  });
+});
+
+// #149: video containers must survive the transport layer. Before this the
+// express.raw type filter only matched audio/*, video/webm and
+// application/octet-stream, so a browser-sent video/mp4 body was never parsed
+// and the handler answered 400 "raw audio body is required".
+describe("music router POST /local/upload — content types and size cap (#149)", () => {
+  let app: express.Express;
+  let botDb: BotDatabase;
+  let cookie: string;
+  let uploadAudio: ReturnType<typeof vi.fn>;
+
+  beforeEach(async () => {
+    botDb = createDatabase(":memory:");
+    const users = createUserStore(botDb.db);
+    const sessions = createSessionStore(botDb.db);
+    const admin = await users.createUser("admin", "pw-admin", "admin");
+    cookie = `${SESSION_COOKIE_NAME}=${sessions.createSession(admin.id).token}`;
+
+    uploadAudio = vi.fn(async (input: { originalName: string }) => ({
+      id: "local-1", name: input.originalName, artist: "本地上传", album: "本地音乐",
+      duration: 1, coverUrl: "", platform: "local",
+    }));
+    const local = { platform: "local", search: vi.fn().mockResolvedValue(empty), uploadAudio } as unknown as MusicProvider;
+
+    app = express();
+    app.use(express.json());
+    app.use(cookieParser());
+    app.use("/api", createRequireAuth(sessions, createPermissionStore(botDb.db), () => getDefaultConfig().guestMode));
+    app.use("/api/music", createMusicRouter(
+      fakeProvider("netease"), fakeProvider("qq"), fakeProvider("bilibili"),
+      pino({ level: "silent" }), local, getDefaultConfig(),
+    ));
+  });
+
+  afterEach(() => botDb.close());
+
+  const post = (contentType: string, body: Buffer, name = "clip.mp4") =>
+    request(app)
+      .post("/api/music/local/upload")
+      .set("Cookie", cookie)
+      .set("Content-Type", contentType)
+      .set("X-Filename", encodeURIComponent(name))
+      .send(body);
+
+  it("accepts the video MIME types browsers actually send", async () => {
+    // These are what Chrome/Firefox put on a File for .mp4/.mov/.avi/.mkv.
+    for (const ct of ["video/mp4", "video/quicktime", "video/x-msvideo", "video/x-matroska", "video/webm"]) {
+      uploadAudio.mockClear();
+      const res = await post(ct, Buffer.from("fake video bytes"));
+      expect(res.status, `content-type ${ct}`).toBe(200);
+      expect(uploadAudio).toHaveBeenCalledOnce();
+      expect(res.body.song.platform).toBe("local");
+    }
+  });
+
+  it("still accepts audio and octet-stream bodies", async () => {
+    for (const ct of ["audio/mpeg", "audio/flac", "application/octet-stream"]) {
+      uploadAudio.mockClear();
+      const res = await post(ct, Buffer.from("fake audio"), "tune.mp3");
+      expect(res.status, `content-type ${ct}`).toBe(200);
+      expect(uploadAudio).toHaveBeenCalledOnce();
+    }
+  });
+
+  it("passes the decoded filename and the content type through to the provider", async () => {
+    await post("video/mp4", Buffer.from("bytes"), "我的 视频.mp4");
+    expect(uploadAudio).toHaveBeenCalledWith(
+      expect.objectContaining({ originalName: "我的 视频.mp4", mimeType: "video/mp4" }),
+    );
+  });
+
+  it("surfaces a provider rejection as a 400 with its message", async () => {
+    uploadAudio.mockRejectedValueOnce(new Error("这个视频里没有音轨，无法播放"));
+    const res = await post("video/mp4", Buffer.from("bytes"));
+    expect(res.status).toBe(400);
+    expect(res.body.error).toBe("这个视频里没有音轨，无法播放");
+  });
+
+  it("requires authentication", async () => {
+    const res = await request(app)
+      .post("/api/music/local/upload")
+      .set("Content-Type", "video/mp4")
+      .send(Buffer.from("bytes"));
+    expect(res.status).toBe(401);
+  });
+
+  it("rejects an oversize body as JSON, not an HTML stack trace", async () => {
+    // Same middleware the route mounts, built with a small limit so the test
+    // does not have to allocate half a gigabyte to reach the cap.
+    const tiny = express();
+    const reached = vi.fn();
+    tiny.post("/u", createLocalUploadBody("1kb"), (_req, res) => { reached(); res.json({ ok: true }); });
+
+    const res = await request(tiny)
+      .post("/u")
+      .set("Content-Type", "video/mp4")
+      .send(Buffer.alloc(4096, 1));
+
+    expect(res.status).toBe(413);
+    expect(res.headers["content-type"]).toMatch(/application\/json/);
+    expect(res.body.error).toContain("文件太大");
+    // The HTML default handler leaked absolute server paths and a stack.
+    expect(res.text).not.toMatch(/node_modules|<\/pre>|at read/);
+    expect(reached).not.toHaveBeenCalled();
+  });
+
+  it("lets a body under the cap through the same middleware", async () => {
+    const tiny = express();
+    tiny.post("/u", createLocalUploadBody("1kb"), (req, res) => {
+      res.json({ bytes: (req.body as Buffer).length });
+    });
+    const res = await request(tiny)
+      .post("/u")
+      .set("Content-Type", "video/mp4")
+      .send(Buffer.alloc(512, 1));
+    expect(res.status).toBe(200);
+    expect(res.body.bytes).toBe(512);
+  });
+
+  it("rejects local uploads when the feature is switched off", async () => {
+    const off = getDefaultConfig();
+    off.localAudioEnabled = false;
+    const users = createUserStore(botDb.db);
+    const sessions = createSessionStore(botDb.db);
+    const a2 = await users.createUser("admin2", "pw-admin2", "admin");
+    const c2 = `${SESSION_COOKIE_NAME}=${sessions.createSession(a2.id).token}`;
+    const app2 = express();
+    app2.use(cookieParser());
+    app2.use("/api", createRequireAuth(sessions, createPermissionStore(botDb.db), () => getDefaultConfig().guestMode));
+    app2.use("/api/music", createMusicRouter(
+      fakeProvider("netease"), fakeProvider("qq"), fakeProvider("bilibili"),
+      pino({ level: "silent" }),
+      { platform: "local", search: vi.fn(), uploadAudio } as unknown as MusicProvider, off,
+    ));
+    const res = await request(app2)
+      .post("/api/music/local/upload")
+      .set("Cookie", c2)
+      .set("Content-Type", "video/mp4")
+      .send(Buffer.from("bytes"));
+    expect(res.status).toBe(403);
+    expect(uploadAudio).not.toHaveBeenCalled();
+  });
+});
+
+describe("music router GET /bilibili/parts", () => {
+  it("returns 400 when bvid is missing", async () => {
+    const router = createMusicRouter(
+      fakeProvider("netease"),
+      fakeProvider("qq"),
+      fakeProvider("bilibili"),
+      pino({ level: "silent" })
+    );
+    const app = express();
+    app.use("/api/music", router);
+
+    const res = await request(app).get("/api/music/bilibili/parts");
+    expect(res.status).toBe(400);
+    expect(res.body.error).toBe("bvid is required");
+  });
+
+  it("returns parts from bilibili provider when available", async () => {
+    const mockBilibili = {
+      platform: "bilibili" as const,
+      search: vi.fn(),
+      getVideoParts: vi.fn().mockResolvedValue({
+        bvid: "BV1test",
+        title: "多P视频测试",
+        parts: [
+          { part: 1, cid: 101, title: "P1", duration: 100 },
+          { part: 2, cid: 102, title: "P2", duration: 200 },
+        ],
+      }),
+    };
+    const router = createMusicRouter(
+      fakeProvider("netease"),
+      fakeProvider("qq"),
+      mockBilibili as unknown as MusicProvider,
+      pino({ level: "silent" })
+    );
+    const app = express();
+    app.use("/api/music", router);
+
+    const res = await request(app).get("/api/music/bilibili/parts?bvid=BV1test");
+    expect(res.status).toBe(200);
+    expect(res.body.bvid).toBe("BV1test");
+    expect(res.body.parts).toHaveLength(2);
+    expect(mockBilibili.getVideoParts).toHaveBeenCalledWith("BV1test");
+  });
+
+  it("returns 404 when getVideoParts returns null", async () => {
+    const mockBilibili = {
+      platform: "bilibili" as const,
+      search: vi.fn(),
+      getVideoParts: vi.fn().mockResolvedValue(null),
+    };
+    const router = createMusicRouter(
+      fakeProvider("netease"),
+      fakeProvider("qq"),
+      mockBilibili as unknown as MusicProvider,
+      pino({ level: "silent" })
+    );
+    const app = express();
+    app.use("/api/music", router);
+
+    const res = await request(app).get("/api/music/bilibili/parts?bvid=BV1notfound");
+    expect(res.status).toBe(404);
+  });
+});
@@ -2,11 +2,61 @@ import express, { Router, type Response } from "express";
 import type { MusicProvider, Song, Album } from "../../music/provider.js";
 import { YouTubeProvider } from "../../music/youtube.js";
 import type { Logger } from "../../logger.js";
-import { isProviderEnabled, defaultPlatform, type BotConfig } from "../../data/config.js";
+import { isProviderEnabled, defaultPlatform, saveConfig, type BotConfig } from "../../data/config.js";
 import { requirePermission } from "../middleware/requirePermission.js";
 import { requireNotGuest } from "../middleware/requireNotGuest.js";
 import { authorize } from "../middleware/authorize.js";

+/**
+ * Body cap for a local upload. express.raw buffers the whole body in memory,
+ * so this is also the peak RAM one upload can cost — raised from 200mb for
+ * video (#149), which is far bigger than audio for the same song, but kept
+ * well short of "any video file at all" for that reason. Only the audio track
+ * survives to disk.
+ */
+export const LOCAL_UPLOAD_LIMIT = "500mb";
+
+/**
+ * Body parser for the local-upload route.
+ *
+ * `type` includes "video/*" (#149): the browser sends the File's own MIME
+ * type, so an .mp4 arrives as video/mp4 and used to be rejected by this
+ * filter before ever reaching the provider. Only the audio track is kept —
+ * uploadAudio remuxes it out on the way in.
+ *
+ * express.raw hands an oversize body to the default error handler, which
+ * answers with an HTML page carrying a stack trace and absolute server paths
+ * (unless NODE_ENV=production, which this project never sets). Video makes
+ * hitting the cap far more likely than audio did, so that one case is
+ * translated into the same JSON shape the rest of this route returns. Any
+ * other body-parser error is passed on untouched.
+ *
+ * Exported as a factory so tests can drive the identical path with a small
+ * limit instead of allocating half a gigabyte.
+ */
+export function createLocalUploadBody(limit: string): express.RequestHandler {
+  const raw = express.raw({
+    type: ["audio/*", "video/*", "application/octet-stream"],
+    limit,
+  });
+  return (req, res, next) => {
+    raw(req, res, (err?: unknown) => {
+      if (!err) {
+        next();
+        return;
+      }
+      const e = err as { type?: string; status?: number };
+      if (e?.type === "entity.too.large" || e?.status === 413) {
+        res.status(413).json({ error: `文件太大，单个文件上限 ${limit}` });
+        return;
+      }
+      next(err);
+    });
+  };
+}
+
+const localUploadBody = createLocalUploadBody(LOCAL_UPLOAD_LIMIT);
+
 export function createMusicRouter(
  neteaseProvider: MusicProvider,
  qqProvider: MusicProvider,
@@ -16,7 +66,10 @@ export function createMusicRouter(
  config?: BotConfig,
  kugouProvider?: MusicProvider,
  spotifyProvider?: MusicProvider,
-  jellyfinProvider?: MusicProvider
+  jellyfinProvider?: MusicProvider,
+  // When set (alongside config), a quality change is persisted to config.json so
+  // it survives a restart (#125). Omitted by unit-test routers → no persistence.
+  configPath?: string,
 ): Router {
  const router = Router();
  const youtubeProvider: MusicProvider = new YouTubeProvider();
@@ -62,10 +115,7 @@ export function createMusicRouter(
      }
      next();
    },
-    express.raw({
-      type: ["audio/*", "video/webm", "application/octet-stream"],
-      limit: "200mb",
-    }),
+    localUploadBody,
    async (req, res) => {
      try {
        if (!localProvider) {
@@ -332,6 +382,31 @@ export function createMusicRouter(
    }
  });

+  // B站分P列表查询
+  router.get("/bilibili/parts", async (req, res) => {
+    try {
+      const bvid = (req.query.bvid as string)?.trim();
+      if (!bvid) {
+        res.status(400).json({ error: "bvid is required" });
+        return;
+      }
+      const provider = bilibiliProvider as any;
+      if (typeof provider.getVideoParts === "function") {
+        const result = await provider.getVideoParts(bvid);
+        if (!result) {
+          res.status(404).json({ error: "Video not found" });
+          return;
+        }
+        res.json(result);
+      } else {
+        res.status(501).json({ error: "Not supported" });
+      }
+    } catch (err) {
+      logger.error({ err }, "Get bilibili parts failed");
+      res.status(500).json({ error: (err as Error).message });
+    }
+  });
+
  // Enabled sources + default platform, for the web UI (source tabs, default
  // search/playback source). Without a config (unit-test routers) everything
  // reports enabled with the legacy netease default.
@@ -480,6 +555,26 @@ export function createMusicRouter(
    if ((!platform || platform === "jellyfin") && jellyfinProvider) {
      jellyfinProvider.setQuality(quality);
    }
+
+    // Persist the (post-apply) per-provider quality so it survives a restart
+    // (#125). Snapshotting each provider's getQuality() AFTER setQuality captures
+    // exactly what each one accepted (jellyfin ignores foreign tiers, kugou maps
+    // aliases), so replaying these on startup reproduces this state faithfully.
+    if (config && configPath) {
+      config.audioQuality = {
+        netease: neteaseProvider.getQuality(),
+        qq: qqProvider.getQuality(),
+        bilibili: bilibiliProvider.getQuality(),
+        kugou: kugouProvider?.getQuality() ?? config.audioQuality.kugou,
+        jellyfin: jellyfinProvider?.getQuality() ?? config.audioQuality.jellyfin,
+      };
+      try {
+        saveConfig(configPath, config);
+      } catch (err) {
+        logger.warn({ err }, "Failed to persist audio quality");
+      }
+    }
+
    logger.info({ quality, platform }, "Audio quality changed");
    res.json({ success: true, quality });
  });
@@ -461,7 +461,11 @@ export function createPlayerRouter(
    }
  });

-  // Play a single song by ID — resolves URL on demand
+  // Play a single song by ID — resolves URL on demand. Funnels through
+  // bot.playSingleSong so the config.playKeepsQueue decision (clear-and-play vs
+  // insert-and-jump, keeping the queue) lives in one place shared with chat
+  // !play. Serialized via runExclusive like /play-now-song so concurrent
+  // requests can't interleave the queue mutation + playback (#119).
  router.post("/:botId/play-song", authorize({ capability: "player.control" }), async (req, res) => {
    try {
      const bot = (req as any).bot;
@@ -474,23 +478,16 @@ export function createPlayerRouter(
        rejectDisabledLocalAudio(res);
        return;
      }
-      const queue = bot.getQueueManager();
-      bot.getPlayer().stop();
-      queue.clear();
-      queue.add({ ...song, requestedBy: requesterName(req) });
-      queue.play();
-
-      bot.getPlayer().resetFailures();
-      const ok = await bot.resolveAndPlay(queue.current()!);
-      // Sweep AFTER the new song is queued+resolved, so replaying a local song
-      // that was still in the queue doesn't delete the file we're about to play.
-      bot.cleanupQueuedLocalSongs?.("queue_replaced");
-      if (!ok) {
-        res.json({ ok: false, message: `无法播放「${song.name || song.id}」（区域/版权限制）` });
-        return;
-      }
-
-      res.json({ ok: true, message: `正在播放：${song.name || 'Unknown'} - ${song.artist || 'Unknown'}` });
+      // The cleanupQueuedLocalSongs sweep now lives inside playSingleSong's
+      // clear branch — do NOT also call it here, or it would delete retained
+      // local uploads in keep-queue mode.
+      const body = await bot.runExclusive(async () => {
+        const ok = await bot.playSingleSong({ ...song }, requesterName(req));
+        return ok
+          ? { ok: true, message: `正在播放：${song.name || 'Unknown'} - ${song.artist || 'Unknown'}` }
+          : { ok: false, message: `无法播放「${song.name || song.id}」（区域/版权限制）` };
+      });
+      res.json(body);
    } catch (err) {
      res.status(500).json({ error: (err as Error).message });
    }
@@ -0,0 +1,119 @@
+import { describe, it, expect } from "vitest";
+import express from "express";
+import request from "supertest";
+import pino from "pino";
+import { createDatabase, SHARED_QUEUE_OWNER, type BotDatabase } from "../../data/database.js";
+import type { BotManager } from "../../bot/manager.js";
+import { createSavedQueuesRouter } from "./saved-queues.js";
+
+const song = (id: string) => ({
+  id,
+  name: id,
+  artist: "",
+  album: "",
+  platform: "netease" as const,
+  coverUrl: "",
+  duration: 1,
+});
+
+function mount(enabled: boolean, opts: { queue?: unknown[] } = {}) {
+  const db = createDatabase(":memory:");
+  const loads: Array<{ songs: unknown[]; mode: string; by?: string }> = [];
+  const bot = {
+    getQueueManager: () => ({ list: () => opts.queue ?? [song("a"), song("b")] }),
+    loadSavedQueue: async (songs: unknown[], mode: string, by?: string) => {
+      loads.push({ songs, mode, by });
+    },
+  };
+  const botManager = { getBot: (_id: string) => bot } as unknown as BotManager;
+  const app = express();
+  app.use(express.json());
+  app.use((req, _res, next) => {
+    (req as unknown as { user: unknown }).user = { id: "u1", username: "alice", role: "member" };
+    next();
+  });
+  app.use(
+    "/api/saved-queues",
+    createSavedQueuesRouter(db, botManager, () => enabled, pino({ level: "silent" })),
+  );
+  return { app, db, loads };
+}
+
+describe("saved-queues router", () => {
+  it("403s every route when the feature is disabled", async () => {
+    const { app } = mount(false);
+    expect((await request(app).get("/api/saved-queues")).status).toBe(403);
+    expect((await request(app).post("/api/saved-queues").send({ botId: "b", name: "x" })).status).toBe(403);
+    expect((await request(app).post("/api/saved-queues/1/load").send({ botId: "b" })).status).toBe(403);
+    expect((await request(app).delete("/api/saved-queues/1")).status).toBe(403);
+  });
+
+  it("saves the current queue (private) and lists it back", async () => {
+    const { app } = mount(true);
+    const save = await request(app).post("/api/saved-queues").send({ botId: "b", name: "night" });
+    expect(save.status).toBe(200);
+    expect(save.body.queue.name).toBe("night");
+    expect(save.body.queue.songCount).toBe(2);
+    expect(save.body.queue.ownerId).toBe("u1");
+
+    const list = await request(app).get("/api/saved-queues");
+    expect(list.status).toBe(200);
+    expect(list.body.queues.map((q: { name: string }) => q.name)).toContain("night");
+  });
+
+  it("saves to the shared bucket when shared:true", async () => {
+    const { app, db } = mount(true);
+    const save = await request(app).post("/api/saved-queues").send({ botId: "b", name: "party", shared: true });
+    expect(save.status).toBe(200);
+    expect(save.body.queue.ownerId).toBe(SHARED_QUEUE_OWNER);
+    expect(db.listSavedQueues(SHARED_QUEUE_OWNER, false).map((q) => q.name)).toEqual(["party"]);
+  });
+
+  it("rejects saving an empty queue", async () => {
+    const { app } = mount(true, { queue: [] });
+    const save = await request(app).post("/api/saved-queues").send({ botId: "b", name: "empty" });
+    expect(save.status).toBe(400);
+  });
+
+  it("requires botId and name", async () => {
+    const { app } = mount(true);
+    expect((await request(app).post("/api/saved-queues").send({ name: "x" })).status).toBe(400);
+    expect((await request(app).post("/api/saved-queues").send({ botId: "b" })).status).toBe(400);
+  });
+
+  it("loads a shared queue (replace by default) into the bot", async () => {
+    const { app, db, loads } = mount(true);
+    const saved = db.saveQueue(SHARED_QUEUE_OWNER, "party", [song("a"), song("b")]);
+    const load = await request(app).post(`/api/saved-queues/${saved.id}/load`).send({ botId: "b" });
+    expect(load.status).toBe(200);
+    expect(load.body).toMatchObject({ ok: true, loaded: 2, mode: "replace" });
+    expect(loads).toHaveLength(1);
+    expect(loads[0].mode).toBe("replace");
+    expect(loads[0].by).toBe("alice");
+  });
+
+  it("loads in append mode when requested", async () => {
+    const { app, db, loads } = mount(true);
+    const saved = db.saveQueue("u1", "mine", [song("a")]);
+    const load = await request(app).post(`/api/saved-queues/${saved.id}/load`).send({ botId: "b", mode: "append" });
+    expect(load.status).toBe(200);
+    expect(loads[0].mode).toBe("append");
+  });
+
+  it("404s loading another user's private queue (no existence leak)", async () => {
+    const { app, db } = mount(true);
+    db.saveQueue("someoneElse", "private", [song("z")]);
+    const other = db.listSavedQueues("someoneElse", false)[0];
+    const load = await request(app).post(`/api/saved-queues/${other.id}/load`).send({ botId: "b", mode: "replace" });
+    expect(load.status).toBe(404);
+  });
+
+  it("deletes an own queue but 404s another user's private one", async () => {
+    const { app, db } = mount(true);
+    const mine = db.saveQueue("u1", "mine", [song("a")]);
+    const theirs = db.saveQueue("someoneElse", "private", [song("z")]);
+    expect((await request(app).delete(`/api/saved-queues/${theirs.id}`)).status).toBe(404);
+    expect((await request(app).delete(`/api/saved-queues/${mine.id}`)).status).toBe(200);
+    expect(db.getSavedQueue(mine.id)).toBeNull();
+  });
+});
@@ -0,0 +1,122 @@
+import { Router } from "express";
+import type { BotDatabase } from "../../data/database.js";
+import { SHARED_QUEUE_OWNER } from "../../data/database.js";
+import type { BotManager } from "../../bot/manager.js";
+import type { Logger } from "../../logger.js";
+
+/**
+ * The /api/saved-queues router (Feature 1, #119). Named save/load of queues,
+ * per-user with a reserved shared bucket. Every route is inert (403) unless
+ * savedQueuesEnabled is on, so the feature is fully gated behind the admin flag.
+ *
+ * Ownership model:
+ *  - WebUI save with `shared:true` → SHARED_QUEUE_OWNER; otherwise the caller's
+ *    own user id (private to them).
+ *  - list returns the caller's own queues + shared ones.
+ *  - load/delete are allowed only for the caller's own queues or shared ones;
+ *    another user's private queue 404s (no existence leak, matching favorites).
+ */
+export function createSavedQueuesRouter(
+  database: BotDatabase,
+  botManager: BotManager,
+  isEnabled: () => boolean,
+  logger: Logger,
+): Router {
+  const router = Router();
+
+  // Feature gate — inert (403) when savedQueuesEnabled is false.
+  router.use((_req, res, next) => {
+    if (!isEnabled()) {
+      res.status(403).json({ error: "此功能未启用" });
+      return;
+    }
+    next();
+  });
+
+  // GET / — the caller's own + shared saved queues (meta only, no songs blob).
+  router.get("/", (req, res) => {
+    const userId = req.user!.id;
+    res.json({ queues: database.listSavedQueues(userId, true) });
+  });
+
+  // POST / — snapshot a bot's CURRENT queue and upsert it.
+  // body: { botId, name, shared? }
+  router.post("/", (req, res) => {
+    const userId = req.user!.id;
+    const { botId, name, shared } = req.body ?? {};
+    if (typeof name !== "string" || !name.trim() || typeof botId !== "string" || !botId) {
+      res.status(400).json({ error: "botId and name are required" });
+      return;
+    }
+    const bot = botManager.getBot(botId);
+    if (!bot) {
+      res.status(404).json({ error: "bot not found" });
+      return;
+    }
+    const songs = bot.getQueueManager().list();
+    if (songs.length === 0) {
+      res.status(400).json({ error: "队列为空，无法保存" });
+      return;
+    }
+    const ownerId = shared === true ? SHARED_QUEUE_OWNER : userId;
+    try {
+      const saved = database.saveQueue(ownerId, name.trim(), songs);
+      logger.info({ userId, ownerId, name: saved.name, count: saved.songCount }, "saved queue upserted");
+      res.json({
+        queue: {
+          id: saved.id,
+          ownerId: saved.ownerId,
+          name: saved.name,
+          songCount: saved.songCount,
+        },
+      });
+    } catch (err) {
+      res.status(400).json({ error: (err as Error).message });
+    }
+  });
+
+  // POST /:id/load — load a saved queue into a bot. body: { botId, mode }
+  router.post("/:id/load", async (req, res) => {
+    const userId = req.user!.id;
+    const username = req.user!.username;
+    const id = parseInt(req.params.id, 10);
+    const { botId, mode } = req.body ?? {};
+    if (Number.isNaN(id) || typeof botId !== "string" || !botId) {
+      res.status(400).json({ error: "invalid id/botId" });
+      return;
+    }
+    const sq = database.getSavedQueue(id);
+    if (!sq || (sq.ownerId !== userId && sq.ownerId !== SHARED_QUEUE_OWNER)) {
+      res.status(404).json({ error: "not found" });
+      return;
+    }
+    const bot = botManager.getBot(botId);
+    if (!bot) {
+      res.status(404).json({ error: "bot not found" });
+      return;
+    }
+    const loadMode = mode === "append" ? "append" : "replace";
+    await bot.loadSavedQueue(sq.songs, loadMode, username || "游客");
+    res.json({ ok: true, loaded: sq.songs.length, mode: loadMode });
+  });
+
+  // DELETE /:id — delete a saved queue (own or shared only).
+  router.delete("/:id", (req, res) => {
+    const userId = req.user!.id;
+    const id = parseInt(req.params.id, 10);
+    if (Number.isNaN(id)) {
+      res.status(400).json({ error: "invalid id" });
+      return;
+    }
+    const sq = database.getSavedQueue(id);
+    if (!sq || (sq.ownerId !== userId && sq.ownerId !== SHARED_QUEUE_OWNER)) {
+      res.status(404).json({ error: "not found" });
+      return;
+    }
+    database.deleteSavedQueue(id);
+    logger.info({ userId, id }, "saved queue deleted");
+    res.json({ ok: true });
+  });
+
+  return router;
+}
@@ -167,7 +167,13 @@ describe("session router", () => {
    expect(meB.status).toBe(401);

    expect(u.id).toBe(meA.body.id);
-  });
+    // 20s, not the 5s default: this case runs SIX bcryptjs rounds (one hash to
+    // create the user, four verifies, one hash for the new password), and
+    // bcryptjs is pure JS. It takes ~4.5s on an idle machine — close enough to
+    // the default that it tipped over whenever the full suite saturated the
+    // CPU, which made it look like a real intermittent failure. The work is
+    // genuinely slow, not hung, so the timeout is what was wrong.
+  }, 20000);
 });

 describe("session router — guest mode", () => {
@@ -0,0 +1,86 @@
+import { describe, it, expect } from "vitest";
+import express from "express";
+import request from "supertest";
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+/**
+ * Search-engine hardening for issue #128: searching "TsmusicBot" surfaced a
+ * large number of deployed instances' WebUI URLs, letting strangers walk into
+ * other people's control pages. The fix is defence in depth — none of these
+ * layers is authentication (that's handled elsewhere), they just keep the
+ * public URL out of crawler indexes:
+ *
+ *   1. `X-Robots-Tag: noindex, nofollow` on EVERY response;
+ *   2. `GET /robots.txt` → `User-agent: * / Disallow: /`;
+ *   3. `<meta name="robots" content="noindex, nofollow">` in web/index.html.
+ *
+ * The header middleware and the /robots.txt route both live at the top of
+ * `createWebServer` in `server.ts`; this test asserts the exact behaviour we
+ * expect from them in isolation (the wiring inside server.ts is verified by
+ * code review / git diff, matching security-headers.test.ts).
+ */
+describe("search-engine hardening (issue #128 noindex)", () => {
+  function buildApp() {
+    const app = express();
+    // Mirrors the security-headers middleware in server.ts.
+    app.use((_req, res, next) => {
+      res.setHeader("X-Frame-Options", "DENY");
+      res.setHeader("Content-Security-Policy", "frame-ancestors 'none'");
+      res.setHeader("X-Robots-Tag", "noindex, nofollow");
+      next();
+    });
+    // Mirrors the public /robots.txt route in server.ts.
+    app.get("/robots.txt", (_req, res) => {
+      res.type("text/plain").send("User-agent: *\nDisallow: /\n");
+    });
+    app.get("/", (_req, res) => res.json({ ok: true }));
+    app.post("/api/session/login", (_req, res) => res.json({ ok: true }));
+    return app;
+  }
+
+  it("sets X-Robots-Tag: noindex, nofollow on GET responses", async () => {
+    const res = await request(buildApp()).get("/");
+    expect(res.status).toBe(200);
+    expect(res.headers["x-robots-tag"]).toBe("noindex, nofollow");
+  });
+
+  it("sets X-Robots-Tag on POST (API) responses too", async () => {
+    const res = await request(buildApp()).post("/api/session/login");
+    expect(res.headers["x-robots-tag"]).toBe("noindex, nofollow");
+  });
+
+  it("serves /robots.txt disallowing all crawlers", async () => {
+    const res = await request(buildApp()).get("/robots.txt");
+    expect(res.status).toBe(200);
+    expect(res.headers["content-type"]).toMatch(/text\/plain/);
+    expect(res.text).toContain("User-agent: *");
+    expect(res.text).toContain("Disallow: /");
+  });
+
+  it("still tags the /robots.txt response itself as noindex", async () => {
+    const res = await request(buildApp()).get("/robots.txt");
+    expect(res.headers["x-robots-tag"]).toBe("noindex, nofollow");
+  });
+});
+
+describe("frontend robots meta tag (issue #128 noindex)", () => {
+  const indexHtmlPath = path.resolve(
+    path.dirname(fileURLToPath(import.meta.url)),
+    "../../web/index.html"
+  );
+  const html = fs.readFileSync(indexHtmlPath, "utf-8");
+
+  const robotsMeta = html.match(
+    /<meta\s+name=["']robots["']\s+content=["']([^"']+)["']\s*\/?>/i
+  );
+
+  it("declares a robots meta tag", () => {
+    expect(robotsMeta).not.toBeNull();
+  });
+
+  it("marks the SPA shell noindex, nofollow (covers /bot/<id> dedicated links)", () => {
+    expect(robotsMeta?.[1]).toBe("noindex, nofollow");
+  });
+});
@@ -19,6 +19,7 @@ import { createUsersRouter } from "./api/users.js";
 import { createAuditStore } from "../data/audit.js";
 import { createAuditRouter } from "./api/audit.js";
 import { createFavoritesRouter } from "./api/favorites.js";
+import { createSavedQueuesRouter } from "./api/saved-queues.js";
 import { createSpotifyRouter } from "./api/spotify.js";
 import type { SpotifyOAuth } from "../music/spotify/spotify-oauth.js";
 import type { SpotifyProvider } from "../music/spotify/provider.js";
@@ -77,12 +78,19 @@ export function createWebServer(options: WebServerOptions): WebServer {
    app.set("trust proxy", true);
  }

-  // Security headers: prevent the WebUI from being embedded in a third-party
-  // iframe (clickjacking defence). CSP frame-ancestors is the modern equivalent
-  // of X-Frame-Options; both are set for compatibility across browsers.
+  // Security headers:
+  //  • X-Frame-Options / CSP frame-ancestors — prevent the WebUI from being
+  //    embedded in a third-party iframe (clickjacking defence). CSP
+  //    frame-ancestors is the modern equivalent of X-Frame-Options; both are
+  //    set for compatibility across browsers.
+  //  • X-Robots-Tag — keep deployed instances out of search-engine indexes
+  //    (issue #128: searching "TsmusicBot" surfaced strangers' WebUI URLs).
+  //    Set on EVERY response so JSON/API responses and the SPA shell are all
+  //    covered; complements /robots.txt and the <meta name="robots"> tag.
  app.use((_req, res, next) => {
    res.setHeader("X-Frame-Options", "DENY");
    res.setHeader("Content-Security-Policy", "frame-ancestors 'none'");
+    res.setHeader("X-Robots-Tag", "noindex, nofollow");
    next();
  });

@@ -95,6 +103,13 @@ export function createWebServer(options: WebServerOptions): WebServer {
  const permissions = createPermissionStore(options.database.db);

  // ─── Public routes (no auth, no CSRF) ───────────────────────────────────
+  // Disallow every crawler (issue #128). Declared before the static SPA
+  // fallback so this wins over index.html for /robots.txt. Belt-and-braces
+  // with the X-Robots-Tag header above and the <meta name="robots"> tag.
+  app.get("/robots.txt", (_req, res) => {
+    res.type("text/plain").send("User-agent: *\nDisallow: /\n");
+  });
+
  app.get("/api/health", (_req, res) => {
    res.json({ status: "ok", version: "0.1.0" });
  });
@@ -151,7 +166,7 @@ export function createWebServer(options: WebServerOptions): WebServer {
  );
  app.use(
    "/api/music",
-    createMusicRouter(options.neteaseProvider, options.qqProvider, options.bilibiliProvider, logger, options.localProvider, options.config, options.kugouProvider, options.spotifyProvider, options.jellyfinProvider)
+    createMusicRouter(options.neteaseProvider, options.qqProvider, options.bilibiliProvider, logger, options.localProvider, options.config, options.kugouProvider, options.spotifyProvider, options.jellyfinProvider, options.configPath)
  );
  app.use("/api/player", createPlayerRouter(
    options.botManager, logger, options.database,
@@ -188,6 +203,18 @@ export function createWebServer(options: WebServerOptions): WebServer {
    );
  }
  app.use("/api/favorites", requireNotGuest, createFavoritesRouter(options.database, logger));
+  // Saved queues (Feature 1, #119). Members + admins only (requireNotGuest);
+  // the router itself 403s every route unless savedQueuesEnabled is on.
+  app.use(
+    "/api/saved-queues",
+    requireNotGuest,
+    createSavedQueuesRouter(
+      options.database,
+      options.botManager,
+      () => options.config.savedQueuesEnabled,
+      logger,
+    ),
+  );

  // admin-only routes
  app.use("/api/users", requireAdmin, createUsersRouter(users, sessions, audit, logger, permissions));
@@ -1,19 +1,24 @@
@echo off
-title TSMusicBot
+:: ============================================================
+::  TSMusicBot - convenience launcher at the repo root.
+::  Everything real lives in scripts\start.bat; this file only makes sure we
+::  run from the project directory and then delegates, so both entry points
+::  behave identically (same node/dist checks, same native-module preflight).
+:: ============================================================

-:: Check node
-where node >nul 2>&1
-if errorlevel 1 (
-    echo Node.js not found. Run scripts\setup.bat first.
+cd /d "%~dp0" || (
+    echo [FATAL] Cannot change to the project directory.
    pause
    exit /b 1
 )

-echo Starting TSMusicBot...
-echo WebUI: http://localhost:3000
-echo Press Ctrl+C to stop.
-echo.
+:: Keep lines inside parenthesised blocks pure ASCII: cmd.exe mis-tracks its
+:: file offset when a block contains multi-byte UTF-8 and eats the "echo " prefix.
+if not exist "scripts\start.bat" (
+    echo scripts\start.bat not found - is this the TSMusicBot project folder?
+    pause
+    exit /b 1
+)

-node dist\index.js
-
-pause
+call "scripts\start.bat"
+exit /b %errorlevel%
@@ -0,0 +1,92 @@
+const { Client, generateIdentity } = require('@honeybbq/teamspeak-client');
+
+function escapeTS3(value) {
+  return value
+    .replace(/\\/g, "\\\\")
+    .replace(/\//g, "\\/")
+    .replace(/ /g, "\\s")
+    .replace(/\|/g, "\\p")
+    .replace(/\n/g, "\\n")
+    .replace(/\r/g, "\\r")
+    .replace(/\t/g, "\\t");
+}
+
+function replaceField(cmd, key, value) {
+  const escaped = escapeTS3(value);
+  const regex = new RegExp(key + "=\\S*");
+  if (regex.test(cmd)) return cmd.replace(regex, key + "=" + escaped);
+  return cmd;
+}
+
+// Version to test - passed via env
+const VERSIONS = [
+  {
+    name: "6.0.0-beta2",
+    version: "6.0.0-beta2 [Build: 1737468425]",
+    platform: "Windows",
+    sign: "b5mySiqYAd4Lv5TZNflW+G5Gk8y7Woo9YnJfHRjmzhUyMdGfF1O7fSGJzmx2Hpe/PKaY2aDuKKD6lSxbLYlKCw==",
+  },
+  {
+    name: "3.?.? wildcard",
+    version: "3.?.? [Build: 5680278000]",
+    platform: "Windows",
+    sign: "DX5NIYLvfJEUjuIbCidnoeozxIDRRkpq3I9vVMBmE9L2qnekOoBzSenkzsg2lC9CMv8K5hkEzhr2TYUYSwUXCg==",
+  },
+  {
+    name: "5.0.0-beta77",
+    version: "5.0.0-beta77 [Build: 1702382332]",
+    platform: "Windows",
+    sign: "Ee6DzP16MUXpdKWjiSY0NGb4thN22/Ks0hwNcaMrWoaadgkM6c5477X0IbGFWVjzTWfjFTEad5noYLUPDWSgCQ==",
+  },
+  {
+    name: "3.6.2 (corrected sign)",
+    version: "3.6.2 [Build: 1695203293]",
+    platform: "Windows",
+    sign: "4BdaZpdgUSMCuIs8qcloJPNxNlJ4o7QKnxMCRO60mSOTtJZyKjOrGLAmeAEtLIJjcjmdSpycMbQOIV92K2vXAw==",
+  },
+];
+
+const idx = parseInt(process.env.VERSION_IDX || "0");
+const V = VERSIONS[idx];
+
+const identity = generateIdentity(8);
+const client = new Client(identity, "localhost:9987", "MusicBot", {
+  logger: {
+    debug: () => {},
+    info: (m) => console.log("[INFO]", m),
+    warn: (m) => console.log("[WARN]", m),
+    error: (m) => console.log("[ERROR]", m),
+  },
+});
+
+console.log("Testing version: " + V.name + " -> " + V.version);
+client.connect().then(() => {
+  const handler = client.handler;
+  const origSendPacket = handler.sendPacket.bind(handler);
+  handler.sendPacket = (pType, data, flags) => {
+    if (pType === 2) {
+      let str = Buffer.from(data).toString("utf-8");
+      if (str.startsWith("clientinit ")) {
+        str = replaceField(str, "client_version", V.version);
+        str = replaceField(str, "client_platform", V.platform);
+        str = replaceField(str, "client_version_sign", V.sign);
+        console.log("[PATCHED] version=" + V.version);
+        origSendPacket(pType, Buffer.from(str), flags);
+        return;
+      }
+    }
+    origSendPacket(pType, data, flags);
+  };
+  return client.waitConnected();
+}).then(() => {
+  console.log("SUCCESS! Connected with clientId = " + client.clientID());
+  client.disconnect();
+  process.exit(0);
+}).catch((err) => {
+  console.log("ERROR:", err && err.message || err);
+  process.exit(1);
+});
+setTimeout(() => {
+  console.log("TIMEOUT - version rejected");
+  process.exit(2);
+}, 10000);
@@ -3,6 +3,12 @@
 <head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <!-- Keep deployed instances out of search-engine indexes (issue #128:
+       searching "TsmusicBot" surfaced strangers' WebUI URLs). Defence in depth
+       alongside the server's X-Robots-Tag header and /robots.txt. Applies to
+       the SPA shell and every in-app route (incl. /bot/<id> dedicated links),
+       since they all share this single index.html. -->
+  <meta name="robots" content="noindex, nofollow">
  <!-- Bilibili / NetEase / QQ image CDNs reject requests whose Referer is not on
       their whitelist, so we must not leak a Referer cross-origin. "same-origin"
       does exactly that: full Referer for our own requests, none for cross-origin
@@ -16,6 +22,22 @@
       "same-origin" keeps the real Origin on same-origin requests, so CSRF passes. -->
  <meta name="referrer" content="same-origin">
  <title>TSMusicBot</title>
+  <!-- Icons live in web/public/ so Vite copies them to the dist root, which is
+       what Express serves (src/index.ts STATIC_DIR). Both an .ico and an .svg
+       are declared: browsers that understand the vector one prefer it and stay
+       sharp on hi-dpi tabs, the rest fall back to the .ico. The .ico also
+       answers the implicit /favicon.ico request — without a real file there the
+       SPA catch-all hands back index.html with a 200, so the tab silently keeps
+       the blank-page icon (issue #142). -->
+  <link rel="icon" href="/favicon.ico" sizes="48x48">
+  <link rel="icon" href="/favicon.svg" type="image/svg+xml" sizes="any">
+  <!-- iOS home-screen icon; iOS masks the corners itself, so this one is a
+       full square. Android reads the manifest instead. -->
+  <link rel="apple-touch-icon" href="/apple-touch-icon.png">
+  <link rel="manifest" href="/site.webmanifest">
+  <!-- Matches --bg-primary of the dark theme, which is what the app starts in
+       (stores/player.ts defaults to 'dark' and never follows the OS scheme). -->
+  <meta name="theme-color" content="#222222">
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link href="https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700;800&display=swap" rel="stylesheet">
 </head>
@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+  <rect width="100" height="100" rx="22" fill="#335eea"/>
+  <g fill="#ffffff" transform="translate(48.46 51.1) scale(0.88) translate(-50 -50)">
+    <path d="M43.5 24 L86.5 15 L86.5 26 L43.5 35 Z"/>
+    <rect x="43.5" y="24" width="6" height="47"/>
+    <rect x="80.5" y="15" width="6" height="47"/>
+    <ellipse cx="32" cy="71" rx="15" ry="11.5" transform="rotate(-20 32 71)"/>
+    <ellipse cx="69" cy="62" rx="15" ry="11.5" transform="rotate(-20 69 62)"/>
+  </g>
+</svg>
@@ -0,0 +1,26 @@
+{
+  "name": "TSMusicBot",
+  "short_name": "TSMusicBot",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#222222",
+  "theme_color": "#222222",
+  "icons": [
+    {
+      "src": "/icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    },
+    {
+      "src": "/icon-maskable-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ]
+}
@@ -7,11 +7,23 @@
    <Player />
    <Toast />
    <Queue class="mobile-queue" :open="mobileQueueOpen" @close="mobileQueueOpen = false" />
+    <BilibiliPartModal />

    <!-- Mobile mini player -->
-    <div v-if="currentSong" class="m-player" @click="router.push('/lyrics')">
-      <div class="m-player-progress">
-        <div class="m-player-progress-fill" :style="{ width: mobileProgressPct + '%' }" />
+    <div v-if="currentSong" class="m-player" @click="onPlayerRowClick">
+      <div
+        ref="seekBarRef"
+        class="m-player-progress"
+        :class="{ 'no-seek': !canSeek, dragging: seeking }"
+        @pointerdown="onSeekDown"
+        @pointermove="onSeekMove"
+        @pointerup="onSeekUp"
+        @pointercancel="onSeekCancel"
+      >
+        <div class="m-player-progress-track">
+          <div class="m-player-progress-fill" :style="{ width: seekBarPct + '%' }" />
+          <div class="m-player-progress-thumb" :style="{ left: seekBarPct + '%' }" />
+        </div>
      </div>
      <CoverArt :url="currentSong.coverUrl" :size="40" :radius="8" />
      <div class="m-player-info">
@@ -79,7 +91,7 @@
 </template>

 <script setup lang="ts">
-import { computed, onMounted, onUnmounted, ref } from 'vue';
+import { computed, onMounted, onUnmounted, ref, watch } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
 import { Icon } from '@iconify/vue';
 import { usePlayerStore } from './stores/player.js';
@@ -91,6 +103,7 @@ import Player from './components/Player.vue';
 import CoverArt from './components/CoverArt.vue';
 import Toast from './components/Toast.vue';
 import Queue from './components/Queue.vue';
+import BilibiliPartModal from './components/BilibiliPartModal.vue';

 const playerStore = usePlayerStore();
 const session = useSession();
@@ -132,15 +145,174 @@ let syncTimer: ReturnType<typeof setInterval> | null = null;
 let mobileRaf: number | null = null;

 function updateMobileProgress() {
-  const duration = currentSong.value?.duration ?? 0;
-  // liveElapsed() recomputes each frame; the cached `elapsed` getter would
-  // leave the mobile bar frozen between server pushes (#107).
-  mobileProgressPct.value = duration > 0
-    ? Math.min((playerStore.liveElapsed() / duration) * 100, 100)
-    : 0;
+  // While the finger owns the bar, the clock must keep its hands off it — see
+  // seekBarPct below. Skipping the write (rather than letting it be overridden)
+  // also avoids 60 pointless reactive re-renders per second mid-drag.
+  if (!seeking.value) {
+    const duration = currentSong.value?.duration ?? 0;
+    // liveElapsed() recomputes each frame; the cached `elapsed` getter would
+    // leave the mobile bar frozen between server pushes (#107).
+    mobileProgressPct.value = duration > 0
+      ? Math.min((playerStore.liveElapsed() / duration) * 100, 100)
+      : 0;
+  }
  mobileRaf = requestAnimationFrame(updateMobileProgress);
 }

+// --- Mini-player seek (#143) -------------------------------------------------
+// The mobile progress bar used to be display-only. It now supports tap-to-seek
+// and drag-to-seek via Pointer Events (one code path for touch, pen and mouse —
+// no mouse/touch handler pairs) with setPointerCapture, so the drag survives the
+// finger sliding off the 12px strip.
+//
+// Decoupling, exactly the reasoning of composables/useDecoupledSlider.ts (#111):
+// updateMobileProgress() rewrites the rendered percentage every animation frame
+// from the *server* clock, which is still the pre-seek position while the user
+// drags. Binding the bar straight to it would snap the fill back under the
+// finger ~60 times a second. So the rendered value is a computed that switches
+// its source: the finger while `seeking`, the clock otherwise.
+const seekBarRef = ref<HTMLElement | null>(null);
+const seeking = ref(false);
+const seekPct = ref(0);
+let seekPointerId: number | null = null;
+// The song the gesture started on. currentSong can advance mid-drag (the track
+// ends), and the ratio the finger picked means nothing against a different
+// song's duration.
+let seekSongId: string | null = null;
+// Bumped per gesture so a slow seek POST can't clear the override belonging to a
+// newer drag that started while it was still in flight.
+let seekGeneration = 0;
+// Timestamp of the last seek gesture end, used to swallow the trailing click
+// (see onPlayerRowClick).
+let seekEndedAt = 0;
+
+const seekBarPct = computed(() => (seeking.value ? seekPct.value : mobileProgressPct.value));
+
+/** Pointer x → 0..1 along the strip, or null when the element isn't measurable. */
+function seekRatio(e: PointerEvent): number | null {
+  const el = seekBarRef.value;
+  if (!el) return null;
+  const rect = el.getBoundingClientRect();
+  if (rect.width <= 0) return null;
+  return Math.max(0, Math.min(1, (e.clientX - rect.left) / rect.width));
+}
+
+/** Duration guard: live streams report 0/undefined and ratio*0 would seek to 0,
+ *  while a missing duration would produce NaN — which the API rejects with 400. */
+function seekableDuration(): number {
+  const duration = currentSong.value?.duration ?? 0;
+  return Number.isFinite(duration) && duration > 0 ? duration : 0;
+}
+
+// Drives the `no-seek` class as well as the gesture guard, so a bar that cannot
+// be seeked also gives `touch-action` back to the page — otherwise the strip
+// would be a 12px band that neither seeks nor scrolls.
+const canSeek = computed(() => canTransport.value && seekableDuration() > 0);
+
+function endSeekGesture() {
+  const el = seekBarRef.value;
+  if (el && seekPointerId !== null && el.hasPointerCapture?.(seekPointerId)) {
+    el.releasePointerCapture(seekPointerId);
+  }
+  seekPointerId = null;
+  seekEndedAt = Date.now();
+}
+
+function onSeekDown(e: PointerEvent) {
+  // Seeking is gated on transport, like the desktop player's `no-seek` state:
+  // without it the bar stays purely visual and taps fall through to the row.
+  if (!canSeek.value) return;
+  // One gesture at a time: a second finger landing on the strip would otherwise
+  // steal seekPointerId, leaving the first pointer captured forever and
+  // committing whichever finger happened to lift first.
+  if (seekPointerId !== null) return;
+  const ratio = seekRatio(e);
+  if (ratio === null) return;
+  // Never let the row's router.push('/lyrics') fire while the user is seeking.
+  e.stopPropagation();
+  e.preventDefault(); // suppress text selection / compat mouse events during the drag
+  seekPointerId = e.pointerId;
+  seekSongId = currentSong.value?.id ?? null;
+  seekGeneration += 1;
+  seekBarRef.value?.setPointerCapture?.(e.pointerId);
+  seeking.value = true;
+  seekPct.value = ratio * 100;
+}
+
+function onSeekMove(e: PointerEvent) {
+  if (!seeking.value || e.pointerId !== seekPointerId) return;
+  const ratio = seekRatio(e);
+  if (ratio === null) return;
+  e.stopPropagation();
+  seekPct.value = ratio * 100;
+}
+
+async function onSeekUp(e: PointerEvent) {
+  if (!seeking.value || e.pointerId !== seekPointerId) return;
+  e.stopPropagation();
+  // A tap never moves, so pointerup is also the commit point for tap-to-seek.
+  const ratio = seekRatio(e) ?? seekPct.value / 100;
+  seekPct.value = ratio * 100;
+  const duration = seekableDuration();
+  const generation = seekGeneration;
+  // If the track advanced while the finger was down, the ratio belongs to a
+  // song that is no longer playing — drop the seek rather than applying it to
+  // whatever started next.
+  const sameSong = currentSong.value?.id === seekSongId;
+  endSeekGesture(); // must run synchronously, before the awaited POST
+  try {
+    if (duration > 0 && sameSong) await playerStore.seek(ratio * duration);
+  } catch {
+    // Seek rejected (403/400/offline) — fall back to the server clock below.
+  } finally {
+    // Release the local override only once seek() has resolved. store.seek()
+    // moves its timing anchor to the requested position in the same tick, so
+    // liveElapsed() already reports the new spot and the bar simply carries on
+    // from where the finger left it. Releasing at pointerup instead would show
+    // the *old* position for one round-trip and then jump a second time.
+    // (_syncAfterAction re-polls 500ms later, but that only nudges the bar by
+    // the network delta — not worth freezing the clock for.)
+    if (generation === seekGeneration) seeking.value = false;
+  }
+}
+
+function onSeekCancel(e: PointerEvent) {
+  if (e.pointerId !== seekPointerId) return;
+  // Gesture stolen (system gesture, call, …): abandon without seeking and hand
+  // the bar straight back to the clock.
+  endSeekGesture();
+  seeking.value = false;
+}
+
+// The whole mini player lives inside `v-if="currentSong"`, so when playback
+// stops mid-drag the strip is destroyed and no pointerup/pointercancel can ever
+// reach it — element removal is not a pointercancel trigger. Without this the
+// `seeking` override would stay true and the progress bar would sit frozen for
+// the rest of the session. Bumping the generation also neuters the finally of
+// any seek still in flight.
+watch(currentSong, () => {
+  if (!seeking.value) return;
+  seekGeneration += 1;
+  seekPointerId = null;
+  seekSongId = null;
+  seeking.value = false;
+});
+
+function onPlayerRowClick() {
+  // Both a tap and a drag on the strip emit a trailing `click`, which would
+  // otherwise navigate to /lyrics the moment the user finishes seeking. A
+  // `@click.stop` on the strip is not enough: after a drag the click's target is
+  // the nearest common ancestor of the pointerdown/pointerup hit-tests, i.e.
+  // `.m-player` itself once the finger has left the 12px strip. So the row
+  // swallows any click arriving right after a seek gesture. A timestamp rather
+  // than a flag, so a gesture that produces no click at all (preventDefault,
+  // pointercancel) can't leave the row permanently unclickable — and so an inert
+  // strip (no transport permission, unknown duration) still falls through here
+  // and navigates, exactly as it did before.
+  if (Date.now() - seekEndedAt < 400) return;
+  router.push('/lyrics');
+}
+
 function toggleMobileVolume() {
  mobileVolumeOpen.value = !mobileVolumeOpen.value;
  if (mobileVolumeOpen.value) mobileQueueOpen.value = false;
@@ -166,6 +338,9 @@ onMounted(async () => {
  // Search or Playlist render hearts correctly without first visiting Home.
  // (fire-and-forget; fetchFavorites swallows the 401 when not yet logged in.)
  playerStore.fetchFavorites();
+  // Non-critical: reads savedQueuesEnabled so the nav entry can show/hide.
+  // Guests get a 403 (swallowed) → the entry stays hidden for them.
+  if (!session.isGuest.value) playerStore.fetchBotSettings();
  syncTimer = setInterval(() => playerStore.syncElapsed(), 3000);
  mobileRaf = requestAnimationFrame(updateMobileProgress);
  // Reconcile the dedicated-link scope only after the bot list is known: the
@@ -239,15 +414,69 @@ onUnmounted(() => {
  top: 0;
  left: 10px;
  right: 10px;
+  // The visible track stays 2px, but 2px is not a touch target (#143), so the
+  // hit area is 12px and grows DOWNWARD into the mini player's own 8px top
+  // padding. It must not reach the transport buttons: they are 32px tall and
+  // centred in the 58px row's 42px content box, i.e. their top edge sits at
+  // 8 + (42 - 32) / 2 = 13px. 12px clears them by 1px. Growing upward is not an
+  // option — that is outside the player's rounded top edge.
+  height: 12px;
+  // Without this the browser claims the gesture for page scrolling partway
+  // through the drag and the pointermove stream stops.
+  touch-action: none;
+  cursor: pointer;
+  user-select: none;
+  -webkit-user-select: none;
+
+  // No transport permission → purely decorative (mirrors Player.vue's .no-seek).
+  // Handing touch-action back matters: an inert strip must not eat gestures.
+  &.no-seek {
+    touch-action: auto;
+  }
+}
+
+.m-player-progress-track {
+  position: relative;
+  // Nudged down inside the 12px hit area so the drag thumb, which is centred on
+  // the track, stays within the card instead of poking out above its top edge.
+  // The 8px thumb's box is (3 + 1 - 4) = 0 to 8, i.e. exactly flush with the
+  // card. (The container is absolutely positioned, so it forms a BFC and this
+  // margin cannot collapse through it.)
+  margin-top: 3px;
  height: 2px;
+  border-radius: 1px;
+  background: var(--border-color);
 }

 .m-player-progress-fill {
-  height: 2px;
+  position: absolute;
+  top: 0;
+  left: 0;
+  height: 100%;
  background: var(--color-primary);
  border-radius: 1px;
 }

+.m-player-progress-thumb {
+  position: absolute;
+  top: 1px;
+  width: 8px;
+  height: 8px;
+  margin-top: -4px;
+  margin-left: -4px;
+  background: var(--color-primary);
+  border-radius: var(--radius-full);
+  opacity: 0;
+  transform: scale(0);
+  transition: opacity var(--transition-fast), transform var(--transition-fast);
+  pointer-events: none;
+}
+
+.m-player-progress.dragging .m-player-progress-thumb {
+  opacity: 1;
+  transform: scale(1);
+}
+
 .m-player-info {
  flex: 1;
  min-width: 0;
@@ -0,0 +1,293 @@
+<template>
+  <div v-if="modal.open" class="edit-modal-overlay" @click.self="store.closeBilibiliPartModal">
+    <div class="edit-modal">
+      <h3 class="modal-title">选择分P</h3>
+
+      <div class="form-group">
+        <label>视频名称</label>
+        <div class="video-info-box">
+          <CoverArt :url="modal.coverUrl" :size="44" :radius="8" />
+          <div class="video-meta">
+            <div class="video-title" :title="modal.title">{{ modal.title }}</div>
+            <div class="video-hint">共 {{ modal.parts.length }} 个分P · {{ actionHint }}</div>
+          </div>
+        </div>
+      </div>
+
+      <div class="form-group">
+        <label>分P列表</label>
+        <div class="parts-list">
+          <div
+            v-for="part in modal.parts"
+            :key="part.part"
+            class="part-item"
+            :class="{ active: selectedPart?.part === part.part }"
+            @click="selectedPart = part"
+            @dblclick="confirmSelect(part)"
+          >
+            <span class="part-badge">P{{ part.part }}</span>
+            <span class="part-name" :title="part.title">{{ part.title }}</span>
+            <span class="part-duration">{{ formatDuration(part.duration) }}</span>
+          </div>
+        </div>
+      </div>
+
+      <div class="modal-actions">
+        <button class="btn-secondary" @click="store.closeBilibiliPartModal">取消</button>
+        <button
+          class="btn-primary"
+          :disabled="!selectedPart"
+          @click="selectedPart && confirmSelect(selectedPart)"
+        >
+          {{ confirmBtnText }}
+        </button>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, watch } from 'vue';
+import { usePlayerStore, type BiliPart } from '../stores/player.js';
+import CoverArt from './CoverArt.vue';
+
+const store = usePlayerStore();
+const modal = computed(() => store.biliPartModal);
+
+const selectedPart = ref<BiliPart | null>(null);
+
+// 弹窗打开时默认选中第 1 P
+watch(
+  () => modal.value.open,
+  (open) => {
+    if (open && modal.value.parts.length > 0) {
+      selectedPart.value = modal.value.parts[0];
+    } else {
+      selectedPart.value = null;
+    }
+  },
+  { immediate: true },
+);
+
+const actionHint = computed(() => {
+  if (modal.value.action === 'playNext') return '添加到下一首播放';
+  if (modal.value.action === 'add') return '添加到播放队列';
+  return '立即播放';
+});
+
+const confirmBtnText = computed(() => {
+  if (modal.value.action === 'playNext') return '下一首播放';
+  if (modal.value.action === 'add') return '添加到队列';
+  return '播放';
+});
+
+function confirmSelect(part: BiliPart) {
+  store.selectBilibiliPart(part);
+}
+
+function formatDuration(seconds: number): string {
+  if (!seconds || seconds <= 0) return '--:--';
+  const m = Math.floor(seconds / 60);
+  const s = seconds % 60;
+  return `${m}:${s.toString().padStart(2, '0')}`;
+}
+</script>
+
+<style lang="scss" scoped>
+.edit-modal-overlay {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.5);
+  z-index: 200;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.edit-modal {
+  background: var(--bg-secondary);
+  border-radius: var(--radius-lg);
+  padding: 28px;
+  width: 480px;
+  max-width: 90vw;
+  max-height: 80vh;
+  display: flex;
+  flex-direction: column;
+}
+
+.modal-title {
+  font-size: 20px;
+  font-weight: 700;
+  margin-bottom: 20px;
+  color: var(--text-primary);
+}
+
+.form-group {
+  margin-bottom: 16px;
+  display: flex;
+  flex-direction: column;
+  min-height: 0;
+
+  label {
+    display: block;
+    font-size: 13px;
+    font-weight: 600;
+    margin-bottom: 6px;
+    opacity: 0.7;
+    color: var(--text-primary);
+  }
+}
+
+.video-info-box {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 14px;
+  background: var(--hover-bg);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+
+  .video-meta {
+    flex: 1;
+    min-width: 0;
+  }
+
+  .video-title {
+    font-size: 13px;
+    font-weight: 600;
+    color: var(--text-primary);
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    margin-bottom: 2px;
+  }
+
+  .video-hint {
+    font-size: 12px;
+    color: var(--text-secondary);
+  }
+}
+
+.parts-list {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  max-height: 280px;
+  overflow-y: auto;
+  padding-right: 4px;
+
+  &::-webkit-scrollbar {
+    width: 6px;
+  }
+  &::-webkit-scrollbar-thumb {
+    background: var(--border-color);
+    border-radius: var(--radius-sm);
+  }
+}
+
+.part-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 10px 14px;
+  background: var(--hover-bg);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+
+  &:hover {
+    border-color: var(--color-primary);
+    background: var(--color-primary-10, rgba(0, 161, 214, 0.08));
+  }
+
+  &.active {
+    border-color: var(--color-primary);
+    background: var(--color-primary-15, rgba(0, 161, 214, 0.15));
+
+    .part-badge {
+      background: var(--color-primary);
+      color: white;
+    }
+
+    .part-name {
+      color: var(--color-primary);
+      font-weight: 600;
+    }
+  }
+
+  .part-badge {
+    font-size: 11px;
+    font-weight: 700;
+    padding: 2px 6px;
+    border-radius: var(--radius-xs);
+    background: var(--color-primary-10, rgba(0, 161, 214, 0.1));
+    color: var(--color-primary);
+    flex-shrink: 0;
+    transition: all var(--transition-fast);
+  }
+
+  .part-name {
+    flex: 1;
+    font-size: 13px;
+    color: var(--text-primary);
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+
+  .part-duration {
+    font-size: 12px;
+    color: var(--text-secondary);
+    font-variant-numeric: tabular-nums;
+    flex-shrink: 0;
+  }
+}
+
+.modal-actions {
+  display: flex;
+  gap: 10px;
+  justify-content: flex-end;
+  margin-top: 10px;
+}
+
+.btn-primary {
+  padding: 10px 20px;
+  background: var(--color-primary);
+  color: white;
+  border-radius: var(--radius-sm);
+  font-size: 13px;
+  font-weight: 600;
+  white-space: nowrap;
+  border: none;
+  cursor: pointer;
+  transition: transform var(--transition-fast);
+
+  &:hover:not(:disabled) {
+    transform: scale(1.02);
+  }
+  &:active:not(:disabled) {
+    transform: scale(0.98);
+  }
+  &:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+  }
+}
+
+.btn-secondary {
+  padding: 10px 20px;
+  background: var(--hover-bg);
+  border-radius: var(--radius-sm);
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--text-primary);
+  border: none;
+  cursor: pointer;
+  transition: opacity var(--transition-fast);
+
+  &:hover {
+    opacity: 0.8;
+  }
+}
+</style>
@@ -7,6 +7,12 @@
      <RouterLink to="/search" class="nav-link" active-class="active">搜索</RouterLink>
      <RouterLink to="/library" class="nav-link" active-class="active">音乐库</RouterLink>
      <RouterLink to="/history" class="nav-link" active-class="active">播放历史</RouterLink>
+      <RouterLink
+        v-if="store.savedQueuesEnabled && !session.isGuest.value"
+        to="/saved-queues"
+        class="nav-link"
+        active-class="active"
+      >已存队列</RouterLink>
    </div>

    <div class="nav-right">
@@ -26,6 +26,7 @@
        :key="`${song.id}-${i}`"
        class="queue-item"
        :class="{ active: store.currentSong?.id === song.id }"
+        @click="onRowClick($event, i)"
        @dblclick="playAtIndex(i)"
      >
        <CoverArt :url="song.coverUrl" :size="32" :radius="4" />
@@ -33,7 +34,7 @@
          <div class="queue-song-name">{{ song.name }}</div>
          <div class="queue-song-artist">{{ song.artist }}</div>
        </div>
-        <button v-if="can('player.queue') || guestCan('removeClear')" class="remove-btn" @click="removeSong(i)" title="移除">
+        <button v-if="can('player.queue') || guestCan('removeClear')" class="remove-btn" @click.stop="removeSong(i)" title="移除">
          <Icon icon="mdi:close" />
        </button>
      </div>
@@ -72,6 +73,21 @@ async function playAtIndex(index: number) {
  await store.fetchQueue();
 }

+// Touch has no `dblclick`, so double-click-to-play was dead in the mobile queue
+// drawer (#143). Same per-event touch rule as SongCard.vue — see the full
+// rationale in the `isTouchClick` comment there. Permission gating stays in
+// playAtIndex(); the remove button uses @click.stop so it can't double-fire.
+function isTouchClick(e: MouseEvent): boolean {
+  const pointerType = (e as PointerEvent).pointerType;
+  if (pointerType) return pointerType === 'touch' || pointerType === 'pen';
+  return window.matchMedia?.('(pointer: coarse)').matches ?? false;
+}
+
+function onRowClick(e: MouseEvent, index: number) {
+  if (!isTouchClick(e)) return;
+  void playAtIndex(index);
+}
+
 async function removeSong(index: number) {
  if (!store.activeBotId) return;
  try {
@@ -205,4 +221,15 @@ async function clearAndStop() {
  color: var(--text-tertiary);
  &:hover { color: var(--text-primary); }
 }
+
+// Touch devices have no :hover, so the parent-hover-reveals-the-button pattern
+// leaves an *invisible but still tappable* remove button on the right edge of
+// every row. Now that a single tap on the row plays (#143), that invisible
+// target reads as "I tapped to play and it deleted the song" — show it, same as
+// .song-actions in SongCard.vue.
+@media (pointer: coarse) {
+  .remove-btn {
+    opacity: 1;
+  }
+}
 </style>
@@ -1,5 +1,5 @@
 <template>
-  <div class="song-card" :class="{ active }" @dblclick="showPlay && $emit('play')">
+  <div class="song-card" :class="{ active }" @click="onRowClick" @dblclick="showPlay && $emit('play')">
    <div class="song-index">{{ index }}</div>
    <CoverArt :url="song.coverUrl" :size="36" :radius="6" />
    <div class="song-info">
@@ -51,12 +51,41 @@ const showPlay = computed(() => can('player.control') || guestCan('playNow'));
 const showPlayNext = computed(() => can('player.control') || guestCan('playNext'));
 const showAdd = computed(() => can('player.queue') || guestCan('addToQueue'));

-defineEmits<{
+const emit = defineEmits<{
  play: [];
  playNext: [];
  add: [];
 }>();

+/**
+ * Was this click made with a finger/stylus rather than a mouse? (#143)
+ *
+ * `dblclick` is mouse-only and never fires on touch, so double-tap-to-play was
+ * simply dead on phones. A single *tap* plays instead, while a single mouse
+ * click must keep doing nothing — otherwise desktop behaviour changes and the
+ * surviving dblclick would fire play twice.
+ *
+ * The check is per-EVENT, not per-device: a `click` is a PointerEvent in modern
+ * browsers, so pointerType describes how *this* click was made. A global
+ * matchMedia('(pointer: coarse)') check reports only the *primary* pointer and
+ * is therefore wrong on hybrid laptops (touchscreen + trackpad); it is used only
+ * as a fallback for browsers that give us no pointerType.
+ */
+function isTouchClick(e: MouseEvent): boolean {
+  const pointerType = (e as PointerEvent).pointerType;
+  if (pointerType) return pointerType === 'touch' || pointerType === 'pen';
+  return window.matchMedia?.('(pointer: coarse)').matches ?? false;
+}
+
+// Listening on `click` rather than `pointerup` on purpose: the browser already
+// suppresses the click that ended a scroll gesture, so a tap that was really the
+// start of a flick can't hijack playback for everyone in the channel.
+// (The action buttons stop propagation, so they never double-fire this.)
+function onRowClick(e: MouseEvent) {
+  if (!showPlay.value || !isTouchClick(e)) return;
+  emit('play');
+}
+
 function formatDuration(seconds: number): string {
  const m = Math.floor(seconds / 60);
  const s = seconds % 60;
@@ -0,0 +1,34 @@
+import { describe, it, expect } from 'vitest';
+import { isShared, sortQueues, SHARED_OWNER, type SavedQueueMeta } from './savedQueues';
+
+const meta = (over: Partial<SavedQueueMeta>): SavedQueueMeta => ({
+  id: 1,
+  ownerId: 'u1',
+  name: 'q',
+  songCount: 0,
+  createdAt: '2026-01-01',
+  updatedAt: '2026-01-01',
+  ...over,
+});
+
+describe('savedQueues helper', () => {
+  it('flags the shared owner', () => {
+    expect(isShared({ ownerId: SHARED_OWNER })).toBe(true);
+    expect(isShared({ ownerId: 'u1' })).toBe(false);
+  });
+
+  it('sorts by updatedAt descending (newest first)', () => {
+    const out = sortQueues([
+      meta({ id: 1, updatedAt: '2026-01-01' }),
+      meta({ id: 2, updatedAt: '2026-02-01' }),
+      meta({ id: 3, updatedAt: '2026-01-15' }),
+    ]);
+    expect(out.map((q) => q.id)).toEqual([2, 3, 1]);
+  });
+
+  it('does not mutate the input array', () => {
+    const input = [meta({ id: 1, updatedAt: '2026-01-01' }), meta({ id: 2, updatedAt: '2026-02-01' })];
+    sortQueues(input);
+    expect(input.map((q) => q.id)).toEqual([1, 2]);
+  });
+});
@@ -0,0 +1,27 @@
+// Pure, framework-free helpers for the Saved Queues feature (#119). Kept
+// separate from the API composable so the list/ownership logic is unit-testable
+// without a DOM or axios.
+
+export interface SavedQueueMeta {
+  id: number;
+  ownerId: string;
+  name: string;
+  songCount: number;
+  createdAt: string;
+  updatedAt: string;
+}
+
+/** Must match SHARED_QUEUE_OWNER in src/data/database.ts. */
+export const SHARED_OWNER = '__shared__';
+
+/** Whether a saved queue lives in the shared bucket (vs. private to a user). */
+export function isShared(q: Pick<SavedQueueMeta, 'ownerId'>): boolean {
+  return q.ownerId === SHARED_OWNER;
+}
+
+/** Newest-updated first; stable for equal timestamps. */
+export function sortQueues<T extends { updatedAt: string }>(qs: T[]): T[] {
+  return [...qs].sort((a, b) =>
+    a.updatedAt < b.updatedAt ? 1 : a.updatedAt > b.updatedAt ? -1 : 0,
+  );
+}
@@ -0,0 +1,52 @@
+import { ref } from 'vue';
+import axios from 'axios';
+import { sortQueues, type SavedQueueMeta } from './savedQueues.js';
+
+/**
+ * API composable for the Saved Queues feature (#119). Wraps /api/saved-queues.
+ * `disabled` becomes true when the server returns 403 (savedQueuesEnabled off),
+ * so the page can render a "feature disabled" state instead of an error.
+ */
+export function useSavedQueues() {
+  const queues = ref<SavedQueueMeta[]>([]);
+  const loading = ref(false);
+  const disabled = ref(false);
+  const error = ref<string | null>(null);
+
+  async function list(): Promise<void> {
+    loading.value = true;
+    error.value = null;
+    try {
+      const res = await axios.get('/api/saved-queues');
+      queues.value = sortQueues((res.data?.queues ?? []) as SavedQueueMeta[]);
+      disabled.value = false;
+    } catch (e: unknown) {
+      const status = (e as { response?: { status?: number } })?.response?.status;
+      if (status === 403) {
+        disabled.value = true;
+        queues.value = [];
+      } else {
+        error.value = '加载已保存队列失败';
+      }
+    } finally {
+      loading.value = false;
+    }
+  }
+
+  async function save(botId: string, name: string, shared: boolean): Promise<void> {
+    await axios.post('/api/saved-queues', { botId, name, shared });
+    await list();
+  }
+
+  async function load(id: number, botId: string, mode: 'replace' | 'append'): Promise<{ loaded: number; mode: string }> {
+    const res = await axios.post(`/api/saved-queues/${id}/load`, { botId, mode });
+    return res.data;
+  }
+
+  async function remove(id: number): Promise<void> {
+    await axios.delete(`/api/saved-queues/${id}`);
+    await list();
+  }
+
+  return { queues, loading, disabled, error, list, save, load, remove };
+}
@@ -22,6 +22,7 @@ const router = createRouter({
    },
    { path: '/lyrics', name: 'lyrics', component: () => import('../views/Lyrics.vue') },
    { path: '/history', name: 'history', component: () => import('../views/History.vue') },
+    { path: '/saved-queues', name: 'saved-queues', component: () => import('../views/SavedQueues.vue') },
    { path: '/settings', name: 'settings', component: () => import('../views/Settings.vue') },
    { path: '/setup', name: 'setup', component: () => import('../views/Setup.vue') },
    { path: '/bot/:id', name: 'bot', component: () => import('../views/BotRedirect.vue') },
@@ -17,6 +17,24 @@ export interface Song {

 export type Source = 'jellyfin' | 'netease' | 'qq' | 'kugou' | 'spotify';

+export interface BiliPart {
+  part: number;
+  cid: number;
+  title: string;
+  duration: number;
+}
+
+export interface BiliPartModalState {
+  open: boolean;
+  song: Song | null;
+  action: 'play' | 'playNext' | 'add';
+  bvid: string;
+  title: string;
+  coverUrl: string;
+  artist: string;
+  parts: BiliPart[];
+}
+
 export interface AlbumItem {
  id: string;
  name: string;
@@ -115,6 +133,10 @@ export const usePlayerStore = defineStore('player', {
    enabledProviders: [] as string[],
    defaultSource: 'netease' as string,

+    // Whether the admin enabled save/load queues (#119). Gates the nav entry
+    // and the /saved-queues page. Fetched from /api/bot/settings (non-guest).
+    savedQueuesEnabled: false,
+
    // Home page cache, split by source
    recommendPlaylists: { netease: [] as PlaylistItem[], qq: [] as PlaylistItem[], kugou: [] as PlaylistItem[], spotify: [] as PlaylistItem[] },
    dailySongs:         { netease: [] as Song[],         qq: [] as Song[],         kugou: [] as Song[], spotify: [] as Song[] },
@@ -134,6 +156,18 @@ export const usePlayerStore = defineStore('player', {
    // Transient notification for surfacing failures (e.g., "song not playable")
    // to a global Toast. Bumped `id` triggers re-render of the same message.
    notification: null as { id: number; message: string; type: 'error' | 'info' } | null,
+
+    // Bilibili 多P分P选择弹窗状态
+    biliPartModal: {
+      open: false,
+      song: null,
+      action: 'play',
+      bvid: '',
+      title: '',
+      coverUrl: '',
+      artist: '',
+      parts: [] as BiliPart[],
+    } as BiliPartModalState,
  }),

  getters: {
@@ -407,8 +441,74 @@ export const usePlayerStore = defineStore('player', {
      this.notification = { id: Date.now(), message, type };
    },

-    async playSong(song: Song) {
+    /**
+     * 检查 B站视频是否为多P，若为多P则弹窗询问，单P则直接修正时长并继续
+     */
+    async checkBilibiliMultiPart(song: Song, action: 'play' | 'playNext' | 'add'): Promise<boolean> {
+      try {
+        const cleanBvid = song.id.split('?')[0].split(':')[0];
+        const res = await axios.get('/api/music/bilibili/parts', { params: { bvid: cleanBvid } });
+        const parts: BiliPart[] = res.data?.parts ?? [];
+        if (parts.length > 1) {
+          this.biliPartModal = {
+            open: true,
+            song,
+            action,
+            bvid: cleanBvid,
+            title: res.data.title || song.name,
+            coverUrl: res.data.coverUrl || song.coverUrl,
+            artist: res.data.artist || song.artist,
+            parts,
+          };
+          return true; // 弹窗接管
+        }
+        if (parts.length === 1) {
+          song.duration = parts[0].duration;
+        }
+      } catch {
+        // 网络请求异常则降级为正常播放
+      }
+      return false;
+    },
+
+    selectBilibiliPart(part: BiliPart) {
+      if (!this.biliPartModal.open || !this.biliPartModal.song) return;
+      const { song, action, bvid, title, artist, coverUrl } = this.biliPartModal;
+      this.biliPartModal.open = false;
+
+      const partTitle = part.title && part.title !== title
+        ? `${title} - P${part.part} ${part.title}`
+        : `${title} (P${part.part})`;
+
+      const partSong: Song = {
+        ...song,
+        id: `${bvid}?p=${part.part}`,
+        name: partTitle,
+        artist: artist || song.artist,
+        coverUrl: coverUrl || song.coverUrl,
+        duration: part.duration,
+      };
+
+      if (action === 'play') {
+        this.playSong(partSong, true);
+      } else if (action === 'playNext') {
+        this.playNextSong(partSong, true);
+      } else if (action === 'add') {
+        this.addSong(partSong, true);
+      }
+    },
+
+    closeBilibiliPartModal() {
+      this.biliPartModal.open = false;
+      this.biliPartModal.song = null;
+    },
+
+    async playSong(song: Song, skipPartCheck = false) {
      if (!this.activeBotId) return;
+      if (!skipPartCheck && song.platform === 'bilibili' && !song.id.includes('?p=')) {
+        const handled = await this.checkBilibiliMultiPart(song, 'play');
+        if (handled) return;
+      }
      // Guests use the non-destructive "play now" (insert-next + skip) so they
      // can't wipe everyone else's queue; members/admins keep the normal behavior.
      const endpoint = useSession().isGuest.value ? 'play-now-song' : 'play-song';
@@ -420,8 +520,12 @@ export const usePlayerStore = defineStore('player', {
      this._syncAfterAction();
    },

-    async playNextSong(song: Song) {
+    async playNextSong(song: Song, skipPartCheck = false) {
      if (!this.activeBotId) return;
+      if (!skipPartCheck && song.platform === 'bilibili' && !song.id.includes('?p=')) {
+        const handled = await this.checkBilibiliMultiPart(song, 'playNext');
+        if (handled) return;
+      }
      const res = await axios.post(`/api/player/${this.activeBotId}/play-next-song`, { song });
      if (res.data?.message) {
        this.notify(res.data.message, res.data.ok === false ? 'error' : 'info');
@@ -440,8 +544,12 @@ export const usePlayerStore = defineStore('player', {
      await axios.post(`/api/player/${this.activeBotId}/add-by-id`, { songId, platform });
    },

-    async addSong(song: Song) {
+    async addSong(song: Song, skipPartCheck = false) {
      if (!this.activeBotId) return;
+      if (!skipPartCheck && song.platform === 'bilibili' && !song.id.includes('?p=')) {
+        const handled = await this.checkBilibiliMultiPart(song, 'add');
+        if (handled) return;
+      }
      await axios.post(`/api/player/${this.activeBotId}/add-song`, { song });
    },

@@ -595,6 +703,18 @@ export const usePlayerStore = defineStore('player', {
      return this.favoritedPlaylists.some((f) => f.playlistId === playlistId && f.platform === platform);
    },

+    /** Load global bot settings we care about client-side (currently just the
+     *  saved-queues gate). Guests get a 403 here, which we swallow so the nav
+     *  entry simply stays hidden for them. */
+    async fetchBotSettings() {
+      try {
+        const res = await axios.get('/api/bot/settings');
+        this.savedQueuesEnabled = res.data?.savedQueuesEnabled === true;
+      } catch {
+        // not critical (guests 403; keep previous value otherwise)
+      }
+    },
+
    /** Load the server-side source gate (enabledProviders + default). */
    async fetchProviders() {
      try {
@@ -0,0 +1,301 @@
+<template>
+  <div class="saved-queues-page">
+    <button class="back-btn" @click="$router.back()">
+      <Icon icon="mdi:arrow-left" />
+      返回
+    </button>
+    <h1 class="page-title">已保存队列</h1>
+
+    <div v-if="disabled" class="empty">
+      此功能未启用。请在「设置 → 行为设置」中开启「保存/加载播放清单」。
+    </div>
+
+    <template v-else>
+      <!-- Save current queue -->
+      <section class="save-card">
+        <div class="save-title">保存当前队列</div>
+        <div class="save-hint">
+          将机器人 <strong>{{ activeBotName }}</strong> 当前的播放队列保存为一份清单，稍后可加载或追加。
+        </div>
+        <div class="save-row">
+          <input
+            v-model="newName"
+            class="input"
+            type="text"
+            placeholder="清单名称"
+            maxlength="80"
+            @keyup.enter="onSave"
+          />
+          <label class="shared-check">
+            <input v-model="newShared" type="checkbox" />
+            共享
+          </label>
+          <button class="btn-primary" :disabled="!canSave || saving" @click="onSave">
+            {{ saving ? '保存中…' : '保存' }}
+          </button>
+        </div>
+      </section>
+
+      <div v-if="loading" class="loading">加载中...</div>
+      <div v-else-if="queues.length === 0" class="empty">还没有已保存的队列</div>
+
+      <div v-else class="queue-list">
+        <div v-for="q in queues" :key="q.id" class="queue-row">
+          <div class="queue-info">
+            <span class="queue-name">{{ q.name }}</span>
+            <span v-if="isShared(q)" class="badge shared">共享</span>
+            <span v-else class="badge private">私有</span>
+            <span class="queue-count">{{ q.songCount }} 首</span>
+          </div>
+          <div class="queue-actions">
+            <button class="btn-sm primary" :disabled="!activeBotId || busyId === q.id" @click="onLoad(q, 'replace')">
+              加载
+            </button>
+            <button class="btn-sm" :disabled="!activeBotId || busyId === q.id" @click="onLoad(q, 'append')">
+              追加
+            </button>
+            <button class="btn-sm danger" :disabled="busyId === q.id" @click="onDelete(q)">
+              删除
+            </button>
+          </div>
+        </div>
+      </div>
+    </template>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted } from 'vue';
+import { Icon } from '@iconify/vue';
+import { usePlayerStore } from '../stores/player.js';
+import { useSavedQueues } from '../composables/useSavedQueues.js';
+import { isShared, type SavedQueueMeta } from '../composables/savedQueues.js';
+
+const store = usePlayerStore();
+const { queues, loading, disabled, list, save, load, remove } = useSavedQueues();
+
+const newName = ref('');
+const newShared = ref(false);
+const saving = ref(false);
+const busyId = ref<number | null>(null);
+
+const activeBotId = computed(() => store.activeBotId);
+const activeBotName = computed(() => store.activeBot?.name ?? '（未选择）');
+const canSave = computed(() => !!activeBotId.value && newName.value.trim().length > 0);
+
+async function onSave() {
+  if (!canSave.value || saving.value) return;
+  saving.value = true;
+  try {
+    await save(activeBotId.value!, newName.value.trim(), newShared.value);
+    store.notify(`已保存「${newName.value.trim()}」`, 'info');
+    newName.value = '';
+    newShared.value = false;
+  } catch (e: unknown) {
+    const msg = (e as { response?: { data?: { error?: string } } })?.response?.data?.error;
+    store.notify(msg || '保存失败', 'error');
+  } finally {
+    saving.value = false;
+  }
+}
+
+async function onLoad(q: SavedQueueMeta, mode: 'replace' | 'append') {
+  if (!activeBotId.value) return;
+  busyId.value = q.id;
+  try {
+    const res = await load(q.id, activeBotId.value, mode);
+    store.notify(
+      mode === 'append' ? `已追加「${q.name}」（${res.loaded} 首）` : `已加载「${q.name}」（${res.loaded} 首）`,
+      'info',
+    );
+    store.fetchQueue();
+  } catch {
+    store.notify('加载失败', 'error');
+  } finally {
+    busyId.value = null;
+  }
+}
+
+async function onDelete(q: SavedQueueMeta) {
+  busyId.value = q.id;
+  try {
+    await remove(q.id);
+    store.notify(`已删除「${q.name}」`, 'info');
+  } catch {
+    store.notify('删除失败', 'error');
+  } finally {
+    busyId.value = null;
+  }
+}
+
+onMounted(async () => {
+  if (!store.activeBotId) {
+    await store.fetchBots();
+  }
+  await list();
+});
+</script>
+
+<style lang="scss" scoped>
+.back-btn {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 14px;
+  opacity: 0.7;
+  margin-bottom: 16px;
+  transition: opacity var(--transition-fast);
+  &:hover { opacity: 1; }
+}
+
+.page-title {
+  font-size: 28px;
+  font-weight: 800;
+  margin-bottom: 24px;
+}
+
+.save-card {
+  background: var(--bg-card);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-md);
+  padding: 18px;
+  margin-bottom: 24px;
+}
+
+.save-title {
+  font-size: 16px;
+  font-weight: 700;
+  margin-bottom: 6px;
+}
+
+.save-hint {
+  font-size: 13px;
+  color: var(--text-secondary);
+  margin-bottom: 14px;
+}
+
+.save-row {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  flex-wrap: wrap;
+}
+
+.input {
+  flex: 1;
+  min-width: 180px;
+  padding: 10px 12px;
+  font-size: 14px;
+  background: var(--hover-bg);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+  color: inherit;
+  &:focus { outline: none; border-color: var(--color-primary); }
+}
+
+.shared-check {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 13px;
+  color: var(--text-secondary);
+  white-space: nowrap;
+  cursor: pointer;
+}
+
+.btn-primary {
+  padding: 10px 18px;
+  font-size: 14px;
+  font-weight: 600;
+  border-radius: var(--radius-sm);
+  background: var(--color-primary);
+  color: #fff;
+  border: 1px solid var(--color-primary);
+  cursor: pointer;
+  transition: filter var(--transition-fast);
+  &:hover:not(:disabled) { filter: brightness(1.08); }
+  &:disabled { opacity: 0.5; cursor: not-allowed; }
+}
+
+.queue-list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.queue-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 12px 14px;
+  background: var(--bg-card);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+  flex-wrap: wrap;
+}
+
+.queue-info {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  min-width: 0;
+}
+
+.queue-name {
+  font-size: 15px;
+  font-weight: 600;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.queue-count {
+  font-size: 12px;
+  color: var(--text-tertiary);
+}
+
+.badge {
+  font-size: 10px;
+  font-weight: 700;
+  padding: 2px 6px;
+  border-radius: 4px;
+  flex-shrink: 0;
+  &.shared { background: var(--color-primary-15); color: var(--color-primary); }
+  &.private { background: var(--hover-bg); color: var(--text-secondary); }
+}
+
+.queue-actions {
+  display: flex;
+  gap: 6px;
+}
+
+.btn-sm {
+  padding: 6px 12px;
+  font-size: 12px;
+  font-weight: 600;
+  border-radius: var(--radius-sm);
+  background: var(--hover-bg);
+  border: 1px solid var(--border-color);
+  color: var(--text-primary);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  &:hover:not(:disabled) { background: var(--bg-secondary); border-color: var(--color-primary); }
+  &:disabled { opacity: 0.5; cursor: not-allowed; }
+  &.primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
+  &.danger { color: #ef4444; }
+}
+
+.loading {
+  text-align: center;
+  padding: 60px;
+  color: var(--text-secondary);
+}
+
+.empty {
+  text-align: center;
+  padding: 60px 20px;
+  color: var(--text-tertiary);
+  font-size: 14px;
+}
+</style>
@@ -28,18 +28,18 @@
      >
        <Icon icon="mdi:tray-arrow-up" class="upload-icon" />
        <div class="upload-copy">
-          <div class="upload-title">拖拽本地音频到这里上传</div>
-          <div class="upload-subtitle">支持 mp3、flac、wav、m4a、ogg、opus、aac、webm 等格式，上传后可直接播放或加入队列</div>
+          <div class="upload-title">拖拽本地音频 / 视频到这里上传</div>
+          <div class="upload-subtitle">音频支持 mp3、flac、wav、m4a、ogg、opus、aac、webm 等，视频支持 mp4、mov、avi、mkv、flv、wmv 等（只取其中的音轨播放）；上传后可直接播放或加入队列</div>
        </div>
        <button class="upload-btn" :disabled="uploading" @click="fileInput?.click()">
-          {{ uploading ? '上传中...' : '选择音频' }}
+          {{ uploading ? '上传中...' : '选择文件' }}
        </button>
        <input
          ref="fileInput"
          class="file-input"
          type="file"
          multiple
-          accept="audio/*,.mp3,.flac,.wav,.m4a,.aac,.ogg,.opus,.webm,.wma,.alac,.aiff,.ape"
+          accept="audio/*,video/*,.mp3,.flac,.wav,.m4a,.aac,.ogg,.opus,.webm,.wma,.alac,.aiff,.ape,.mp4,.mov,.avi,.mkv,.flv,.wmv,.m4v,.mpg,.mpeg,.3gp,.ts,.m2ts,.ogv"
          @change="handleFileSelect"
        />
      </div>
@@ -404,8 +404,17 @@ async function doSearch() {
 }


-function isAudioFile(file: File): boolean {
-  return file.type.startsWith('audio/') || /\.(mp3|flac|wav|m4a|aac|ogg|opus|webm|wma|alac|aiff|ape)$/i.test(file.name);
+/** Must match LOCAL_UPLOAD_LIMIT in src/web/api/music.ts. */
+const UPLOAD_MAX_MB = 500;
+const UPLOAD_MAX_BYTES = UPLOAD_MAX_MB * 1024 * 1024;
+
+// Video is accepted too (#149) — the server keeps only the audio track.
+// Keep the extension list in sync with AUDIO_EXTENSIONS / VIDEO_EXTENSIONS in
+// src/music/local.ts; the server re-validates, this just avoids a round-trip.
+function isMediaFile(file: File): boolean {
+  return file.type.startsWith('audio/')
+    || file.type.startsWith('video/')
+    || /\.(mp3|flac|wav|m4a|aac|ogg|opus|webm|wma|alac|aiff|ape|mp4|mov|avi|mkv|flv|wmv|m4v|mpg|mpeg|3gp|ts|m2ts|ogv)$/i.test(file.name);
 }

 async function uploadLocalFiles(fileList: File[]) {
@@ -414,10 +423,22 @@ async function uploadLocalFiles(fileList: File[]) {
    uploadMessage.value = '本地音频播放已关闭';
    return;
  }
-  const files = fileList.filter(isAudioFile);
+  const candidates = fileList.filter(isMediaFile);
+  if (candidates.length === 0) {
+    uploadMessageType.value = 'error';
+    uploadMessage.value = '没有找到可上传的音频 / 视频文件';
+    return;
+  }
+
+  // Reject oversize files before spending minutes uploading them (#149).
+  // The server enforces the same cap (LOCAL_UPLOAD_LIMIT in
+  // src/web/api/music.ts) and answers 413 — this only saves the round-trip,
+  // which matters now that a single video can be hundreds of megabytes.
+  const files = candidates.filter((f) => f.size <= UPLOAD_MAX_BYTES);
+  const oversize = candidates.filter((f) => f.size > UPLOAD_MAX_BYTES);
  if (files.length === 0) {
    uploadMessageType.value = 'error';
-    uploadMessage.value = '没有找到可上传的音频文件';
+    uploadMessage.value = `文件太大，单个文件上限 ${UPLOAD_MAX_MB} MB：${oversize[0].name}`;
    return;
  }

@@ -426,8 +447,19 @@ async function uploadLocalFiles(fileList: File[]) {
  uploadMessage.value = `正在上传 ${files.length} 个文件...`;

  const uploaded: Song[] = [];
-  const failed: string[] = [];
-  for (const file of files) {
+  const failed: string[] = oversize.map((f) => `${f.name}: 超过 ${UPLOAD_MAX_MB} MB 上限`);
+  for (const [i, file] of files.entries()) {
+    // Videos are orders of magnitude bigger than the audio files this used to
+    // handle (#149), so a silent "正在上传..." can sit there for minutes and
+    // look hung. Report per-file percentage while the bytes are in flight, and
+    // switch to a processing note once the server takes over (it still has to
+    // probe the file and remux the audio track out).
+    const label = files.length > 1 ? `（${i + 1}/${files.length}）` : '';
+    const setProgress = (text: string) => {
+      uploadMessageType.value = 'info';
+      uploadMessage.value = `${text}${label}：${file.name}`;
+    };
+    setProgress('正在上传');
    try {
      const res = await axios.post('/api/music/local/upload', file, {
        headers: {
@@ -435,6 +467,11 @@ async function uploadLocalFiles(fileList: File[]) {
          'X-Filename': encodeURIComponent(file.name),
        },
        maxBodyLength: Infinity,
+        onUploadProgress: (e) => {
+          if (!e.total) return;
+          const pct = Math.round((e.loaded / e.total) * 100);
+          setProgress(pct >= 100 ? '服务端处理中' : `正在上传 ${pct}%`);
+        },
      });
      if (res.data?.song) uploaded.push(res.data.song as Song);
    } catch (err: any) {
@@ -387,7 +387,7 @@
            <img :src="qqQr.dataUrl" class="qr-image" alt="QR Code" />
            <div class="qr-status" :class="qqQr.status">
              <template v-if="qqQr.status === 'waiting'">
-                <Icon icon="mdi:cellphone" /> 请使用QQ音乐APP扫码
+                <Icon icon="mdi:cellphone" /> 请使用手机QQ扫码
              </template>
              <template v-else-if="qqQr.status === 'scanned'">
                <Icon icon="mdi:check" /> 已扫码，请在手机上确认
@@ -555,6 +555,36 @@
      </div>
    </section>

+    <!-- Default music source (issue #126): the source used by chat commands
+         (!play/!add …) and the WebUI when no platform flag is given. Saving is a
+         global bot setting, so gate on bot.manage like the other behavior rows. -->
+    <section v-if="can('bot.manage')" class="settings-section">
+      <h2 class="section-title">默认音源</h2>
+      <p class="profile-section-hint">
+        设置不带音源参数时（如聊天里的 <code>!play 歌名</code> 或网页搜索）默认使用的音源。
+        例如把默认音源设为「哔哩哔哩」后，点播 B 站音乐就不用每次都加 <code>-b</code>。
+        选择「自动」则按内置优先级挑选第一个已启用的音源（网易云 → QQ → 酷狗 → Jellyfin → 哔哩哔哩 → YouTube）。
+      </p>
+      <div class="setting-row">
+        <div class="setting-label">
+          <Icon icon="mdi:music-box-multiple-outline" class="setting-icon" />
+          默认音源
+        </div>
+        <div class="prefix-input-wrap">
+          <select v-model="defaultPlatformForm" class="input input-sm default-source-select">
+            <option value="">自动（按优先级）</option>
+            <option v-for="opt in defaultSourceOptions" :key="opt.value" :value="opt.value">
+              {{ opt.label }}
+            </option>
+          </select>
+          <button class="btn-primary" :disabled="defaultSourceSaving" @click="saveDefaultSource">
+            {{ defaultSourceSaving ? '保存中…' : '保存' }}
+          </button>
+        </div>
+      </div>
+      <p v-if="defaultSourceMessage" class="spotify-message" :class="`tone-${defaultSourceMessageTone}`">{{ defaultSourceMessage }}</p>
+    </section>
+
    <!-- Spotify (Connect) playback via librespot — requires platform.auth -->
    <section v-if="can('platform.auth')" class="settings-section">
      <h2 class="section-title">Spotify 播放（实验性）</h2>
@@ -748,6 +778,70 @@
        />
      </label>

+      <label class="profile-toggle behavior-toggle">
+        <div class="profile-toggle-text">
+          <div class="profile-toggle-label">语音闪避</div>
+          <div class="profile-toggle-hint">检测到其他客户端说话时自动压低音乐音量，说话结束后恢复。默认关闭。</div>
+        </div>
+        <input
+          v-model="voiceDuckingEnabled"
+          type="checkbox"
+          class="profile-toggle-switch"
+          :disabled="voiceDuckingControlsDisabled"
+          @change="saveVoiceDucking"
+        />
+      </label>
+
+      <div class="setting-row voice-ducking-volume">
+        <div class="setting-label">
+          <Icon icon="mdi:volume-minus" class="setting-icon" />
+          <div>
+            <div>说话时保留原音量</div>
+            <div class="voice-ducking-hint">例如设为 30%，有人说话时音乐将降至原音量的 30%。</div>
+          </div>
+        </div>
+        <div class="voice-ducking-controls">
+          <input
+            v-model.number="voiceDuckingVolumePercent"
+            type="range"
+            min="0"
+            max="100"
+            step="0.1"
+            class="voice-ducking-range"
+            :disabled="voiceDuckingControlsDisabled"
+            aria-label="说话时保留原音量百分比"
+          />
+          <div class="prefix-input-wrap">
+            <input
+              v-model.number="voiceDuckingVolumePercent"
+              type="number"
+              min="0"
+              max="100"
+              step="0.1"
+              class="input input-sm"
+              style="max-width:80px"
+              :disabled="voiceDuckingControlsDisabled"
+              aria-label="说话时保留原音量百分比"
+              @blur="normalizeVoiceDuckingVolume"
+            />
+            <span class="voice-ducking-unit">%</span>
+            <button class="btn-primary" :disabled="voiceDuckingControlsDisabled" @click="saveVoiceDucking">
+              {{ !voiceDuckingLoaded ? '加载设置…' : voiceDuckingSaving ? '保存中…' : '保存比例' }}
+            </button>
+          </div>
+        </div>
+        <p
+          v-if="voiceDuckingMessage"
+          class="voice-ducking-message"
+          :class="`tone-${voiceDuckingMessageTone}`"
+          :role="voiceDuckingMessageTone === 'warn' ? 'alert' : 'status'"
+          :aria-live="voiceDuckingMessageTone === 'warn' ? 'assertive' : 'polite'"
+          aria-atomic="true"
+        >
+          {{ voiceDuckingMessage }}
+        </p>
+      </div>
+
      <label class="profile-toggle behavior-toggle">
        <div class="profile-toggle-text">
          <div class="profile-toggle-label">本地音频播放</div>
@@ -760,6 +854,32 @@
          @change="saveLocalAudioEnabled"
        />
      </label>
+
+      <label class="profile-toggle behavior-toggle">
+        <div class="profile-toggle-text">
+          <div class="profile-toggle-label">保存/加载播放清单（含重启后自动恢复队列）</div>
+          <div class="profile-toggle-hint">开启后可在网页与聊天命令（!save / !load / !queues）保存和加载播放清单，并在机器人重启后自动恢复并继续播放上次的队列。重启只能从当前曲目的开头恢复（不记忆进度）；Spotify 恢复为尽力而为。默认关闭。</div>
+        </div>
+        <input
+          v-model="savedQueuesEnabled"
+          type="checkbox"
+          class="profile-toggle-switch"
+          @change="saveSavedQueuesEnabled"
+        />
+      </label>
+
+      <label class="profile-toggle behavior-toggle">
+        <div class="profile-toggle-text">
+          <div class="profile-toggle-label">直接播放单曲时不清空队列</div>
+          <div class="profile-toggle-hint">开启后，直接播放单曲会插入到当前歌曲之后并立即播放，播完继续原队列，而不是清空整个队列。仅影响单曲的「直接播放」；歌单/专辑/电台仍会替换队列。默认关闭。</div>
+        </div>
+        <input
+          v-model="playKeepsQueue"
+          type="checkbox"
+          class="profile-toggle-switch"
+          @change="savePlayKeepsQueue"
+        />
+      </label>
    </section>

    <!-- Guest Mode (admin only) -->
@@ -1161,6 +1281,51 @@ function providerOn(p: string): boolean {
  return enabledProviders.value.length === 0 || enabledProviders.value.includes(p);
 }

+// --- Default music source (issue #126) ---
+// Chinese labels for the gateable providers, shown in the default-source select.
+const PROVIDER_LABELS: Record<string, string> = {
+  netease: '网易云音乐',
+  qq: 'QQ音乐',
+  kugou: '酷狗音乐',
+  bilibili: '哔哩哔哩',
+  youtube: 'YouTube',
+  jellyfin: 'Jellyfin',
+};
+// Empty string = "auto" (follow the fixed priority order); persisted as null.
+const defaultPlatformForm = ref('');
+const defaultSourceSaving = ref(false);
+const defaultSourceMessage = ref('');
+const defaultSourceMessageTone = ref<'ok' | 'warn'>('ok');
+// Only currently-enabled sources can be picked as the default.
+const defaultSourceOptions = computed(() =>
+  enabledProviders.value
+    .filter((p) => p in PROVIDER_LABELS)
+    .map((p) => ({ value: p, label: PROVIDER_LABELS[p] })),
+);
+
+async function saveDefaultSource() {
+  defaultSourceSaving.value = true;
+  defaultSourceMessage.value = '';
+  try {
+    const res = await axios.post('/api/bot/settings', {
+      defaultPlatform: defaultPlatformForm.value || null,
+    });
+    defaultPlatformForm.value = res.data?.defaultPlatform ?? '';
+    // Push the new default across the app immediately (search bar / play calls
+    // read store.defaultSource, refreshed via GET /api/music/providers).
+    await store.fetchProviders();
+    defaultSourceMessageTone.value = 'ok';
+    defaultSourceMessage.value = '已保存';
+  } catch (err: any) {
+    defaultSourceMessageTone.value = 'warn';
+    defaultSourceMessage.value = err?.response?.status === 403
+      ? '没有权限修改设置（需要 bot.manage）'
+      : '保存失败，请稍后重试';
+  } finally {
+    defaultSourceSaving.value = false;
+  }
+}
+
 // --- Jellyfin connection (admin-configured; password/apiKey are write-only) ---
 const jellyfinForm = reactive({
  serverUrl: '',
@@ -1217,6 +1382,11 @@ async function saveJellyfin() {
      // Search bar / home sections / FM cards react without a reload.
      store.fetchProviders();
    }
+    // Disabling a source can clear a default that pointed at it (backend
+    // reconciles enabledProviders → defaultPlatform); keep the select in sync.
+    if (res.data && 'defaultPlatform' in res.data) {
+      defaultPlatformForm.value = res.data.defaultPlatform ?? '';
+    }
    jellyfinMessageTone.value = 'ok';
    jellyfinMessage.value = '已保存';
    await checkAuthStatus();
@@ -1489,14 +1659,63 @@ async function savePrefix() {
 const idleTimeout = ref(0);
 // Defaults OFF to match the backend default (config.ts getDefaultConfig).
 const autoPauseOnEmpty = ref(false);
+// Voice ducking defaults OFF and retains 30% of the configured player volume.
+const voiceDuckingEnabled = ref(false);
+const voiceDuckingVolumePercent = ref(30);
+const voiceDuckingLoaded = ref(false);
+const voiceDuckingSaving = ref(false);
+const voiceDuckingControlsDisabled = computed(
+  () => !voiceDuckingLoaded.value || voiceDuckingSaving.value,
+);
+const voiceDuckingMessage = ref('');
+const voiceDuckingMessageTone = ref<'ok' | 'warn'>('ok');
+let savedVoiceDucking = { enabled: false, volumePercent: 30 };
+let voiceDuckingRequestRevision = 0;
 const localAudioEnabled = ref(true);
+// Saved-queues + play-keeps-queue toggles (#119), both default OFF.
+const savedQueuesEnabled = ref(false);
+const playKeepsQueue = ref(false);
+
+function normalizeVoiceDuckingVolume(): number {
+  const raw = voiceDuckingVolumePercent.value as number | string;
+  const value = raw === '' ? Number.NaN : Number(raw);
+  voiceDuckingVolumePercent.value = Number.isFinite(value)
+    ? Math.min(100, Math.max(0, value))
+    : savedVoiceDucking.volumePercent;
+  return voiceDuckingVolumePercent.value;
+}
+
+function applyVoiceDuckingConfig(config: unknown) {
+  if (!config || typeof config !== 'object') return;
+  const value = config as { enabled?: unknown; volumePercent?: unknown };
+  voiceDuckingEnabled.value = typeof value.enabled === 'boolean' ? value.enabled : false;
+  const percent = value.volumePercent;
+  voiceDuckingVolumePercent.value = typeof percent === 'number' && Number.isFinite(percent)
+    ? Math.min(100, Math.max(0, percent))
+    : 30;
+  savedVoiceDucking = {
+    enabled: voiceDuckingEnabled.value,
+    volumePercent: voiceDuckingVolumePercent.value,
+  };
+}

 async function loadIdleTimeout() {
+  const voiceDuckingLoadRevision = voiceDuckingRequestRevision;
  try {
    const res = await axios.get('/api/bot/settings');
    idleTimeout.value = res.data.idleTimeoutMinutes ?? 0;
    autoPauseOnEmpty.value = res.data.autoPauseOnEmpty ?? false;
+    // A later save owns the state. Do not let an older GET response overwrite
+    // it if this loader is ever re-entered while a POST is in flight.
+    if (voiceDuckingLoadRevision === voiceDuckingRequestRevision) {
+      applyVoiceDuckingConfig(res.data.voiceDucking ?? { enabled: false, volumePercent: 30 });
+      voiceDuckingLoaded.value = true;
+      voiceDuckingMessage.value = '';
+    }
    localAudioEnabled.value = res.data.localAudioEnabled ?? true;
+    savedQueuesEnabled.value = res.data.savedQueuesEnabled ?? false;
+    playKeepsQueue.value = res.data.playKeepsQueue ?? false;
+    store.savedQueuesEnabled = savedQueuesEnabled.value;
    applyGuestModeFromServer(res.data.guestMode);
    applyAdminGroupsFromServer(res.data.adminGroups);
    applySpotifyConfig(res.data.spotify);
@@ -1506,7 +1725,14 @@ async function loadIdleTimeout() {
      jellyfinEnabledForm.value = res.data.enabledProviders.includes('jellyfin');
      enabledProvidersLoaded.value = true;
    }
-  } catch { /* ignore */ }
+    // null (unset) → "" so the select shows "自动（按优先级）".
+    defaultPlatformForm.value = res.data.defaultPlatform ?? '';
+  } catch {
+    if (!voiceDuckingLoaded.value) {
+      voiceDuckingMessageTone.value = 'warn';
+      voiceDuckingMessage.value = '语音闪避设置加载失败，请刷新页面重试';
+    }
+  }
 }

 async function saveIdleTimeout() {
@@ -1521,6 +1747,29 @@ async function saveAutoPause() {
  } catch { /* ignore */ }
 }

+async function saveVoiceDucking() {
+  if (!voiceDuckingLoaded.value || voiceDuckingSaving.value) return;
+  voiceDuckingSaving.value = true;
+  voiceDuckingRequestRevision++;
+  voiceDuckingMessage.value = '';
+  const submitted = {
+    enabled: voiceDuckingEnabled.value,
+    volumePercent: normalizeVoiceDuckingVolume(),
+  };
+  try {
+    const res = await axios.post('/api/bot/settings', { voiceDucking: submitted });
+    applyVoiceDuckingConfig(res.data?.voiceDucking ?? submitted);
+    voiceDuckingMessageTone.value = 'ok';
+    voiceDuckingMessage.value = '已保存';
+  } catch {
+    applyVoiceDuckingConfig(savedVoiceDucking);
+    voiceDuckingMessageTone.value = 'warn';
+    voiceDuckingMessage.value = '保存失败，请稍后重试';
+  } finally {
+    voiceDuckingSaving.value = false;
+  }
+}
+
 async function saveLocalAudioEnabled() {
  try {
    const res = await axios.post('/api/bot/settings', { localAudioEnabled: localAudioEnabled.value });
@@ -1528,6 +1777,22 @@ async function saveLocalAudioEnabled() {
  } catch { /* ignore */ }
 }

+async function saveSavedQueuesEnabled() {
+  try {
+    const res = await axios.post('/api/bot/settings', { savedQueuesEnabled: savedQueuesEnabled.value });
+    savedQueuesEnabled.value = res.data.savedQueuesEnabled ?? savedQueuesEnabled.value;
+    // Keep the shared store flag (nav gate) in sync without a reload.
+    store.savedQueuesEnabled = savedQueuesEnabled.value;
+  } catch { /* ignore */ }
+}
+
+async function savePlayKeepsQueue() {
+  try {
+    const res = await axios.post('/api/bot/settings', { playKeepsQueue: playKeepsQueue.value });
+    playKeepsQueue.value = res.data.playKeepsQueue ?? playKeepsQueue.value;
+  } catch { /* ignore */ }
+}
+
 // --- Spotify (Connect) settings (§8) ---
 // NOTE: This card's status comes ONLY from /api/spotify/status (playback OAuth
 // `authorized`). It is deliberately NOT wired to the player store's
@@ -2448,6 +2713,13 @@ onUnmounted(() => {

 .input-sm { max-width: 80px; }

+// The default-source picker holds full source names ("网易云音乐"), so it needs
+// more room than the 80px .input-sm cap.
+.default-source-select {
+  max-width: none;
+  flex: 0 0 160px;
+}
+
 .textarea {
  width: 100%;
  padding: 10px 14px;
@@ -2775,6 +3047,45 @@ onUnmounted(() => {
  padding-top: 4px;
 }

+.voice-ducking-volume {
+  padding: 4px 0 14px;
+}
+
+.voice-ducking-hint {
+  font-size: 12px;
+  color: var(--text-tertiary);
+  margin-top: 4px;
+  line-height: 1.4;
+  font-weight: 400;
+}
+
+.voice-ducking-controls {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  flex-wrap: wrap;
+}
+
+.voice-ducking-range {
+  flex: 1 1 240px;
+  min-width: 160px;
+  accent-color: var(--color-primary);
+  cursor: pointer;
+}
+
+.voice-ducking-unit {
+  font-size: 13px;
+  opacity: 0.7;
+}
+
+.voice-ducking-message {
+  margin: 8px 0 0;
+  font-size: 12px;
+
+  &.tone-ok { color: var(--color-online); }
+  &.tone-warn { color: #e26a6a; }
+}
+
@media (max-width: 768px) {
  .profile-bot-header {
    padding: 14px 12px;
@@ -2802,6 +3113,17 @@ onUnmounted(() => {
      transform: translateX(20px);
    }
  }
+
+  .voice-ducking-controls {
+    align-items: stretch;
+    flex-direction: column;
+    gap: 10px;
+  }
+
+  .voice-ducking-range {
+    flex-basis: auto;
+    width: 100%;
+  }
 }

 // --- User Management ---