fix(install): bring install.sh up to Node 22 and document both Linux scripts (#165)

install.sh still installed Node 20 (dropped in #152), ran the Debian-only
NodeSource script on yum systems, and hard-coded /usr/bin/node. The
README only mentioned install.sh, not setup.sh.

install.sh now:
- installs Node 22 LTS from the right NodeSource repo per distro and
  checks the same 22.12+/24+ floor as setup.sh
- delegates npm install, mirror detection, native-binary checks and the
  build to setup.sh, so the two scripts share one install path
- stops the service and replaces dist/node_modules on re-install (data/
  is kept), copies bin/ (yt-dlp), and uses the real node path in the unit

README explains the difference between the two scripts and when to use
which. setup.sh's "Node.js not found" message no longer says 20+.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

README.md

@@ -136,14 +136,35 @@ ports:
 
 </details>
 
-### 方式四：Linux 一键安装
+### 方式四：Linux 安装脚本
+
+Linux 下有两个脚本，按需二选一：
+
+| | `scripts/install.sh`（一键安装 + 系统服务） | `scripts/setup.sh`（只安装构建） |
+|---|---|---|
+| 适合 | 想开箱即用、开机自启的服务器 | 想自己决定怎么常驻（screen / tmux / pm2 / 自写服务）的用户，或 macOS |
+| Node.js | 没有或版本过低时**自动安装 Node 22 LTS**（apt / yum / pacman） | **不会安装**，需先自行装好 Node 22.12+ |
+| 系统依赖 | 自动安装构建工具（和 FFmpeg，作为内置 FFmpeg 的后备） | 不安装，只提示 |
+| 安装位置 | 构建后复制到 `/opt/tsmusicbot`（重装时保留 `data/`） | 就在当前项目目录 |
+| 系统服务 | 自动配置 systemd 服务 `tsmusicbot` 并开机自启 | **不配置服务**，完成后自己 `npm start` |
+| 需要 root | 是（`sudo`） | 否 |
+
+两者共用同一套安装逻辑：`install.sh` 会调用 `setup.sh` 完成依赖安装、国内网络镜像切换、原生模块校验和构建，然后再复制文件、配置服务。
+
+**一键安装 + systemd 服务：**
 
 ```bash
 chmod +x scripts/install.sh
 sudo ./scripts/install.sh
+# 之后：systemctl status|restart|stop tsmusicbot，日志：journalctl -u tsmusicbot -f
 ```
 
-自动安装 Node.js 和依赖，配置 systemd 服务，支持开机自启。
+**只安装构建（不装 Node、不配服务）：**
+
+```bash
+bash scripts/setup.sh
+npm start
+```
 
 ## 更新升级
 
@@ -364,7 +385,6 @@ 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） |
@@ -496,6 +516,7 @@ teamspeak-music-bot/
 ├── scripts/                    # 部署脚本
 │   ├── setup.bat               # Windows 首次安装
 │   ├── start.bat               # Windows 启动脚本
+│   ├── setup.sh                # Linux/macOS 首次安装（只安装构建）
 │   ├── install.sh              # Linux 一键安装 + systemd 服务
 │   └── docker/                 # Docker 部署文件
 │       ├── Dockerfile

scripts/install.sh

@@ -1,6 +1,16 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+#
+# TSMusicBot Installer (Linux, systemd)
+# - Installs system packages and Node.js 22 LTS
+# - Runs scripts/setup.sh to install dependencies, verify native binaries and build
+# - Copies the build to /opt/tsmusicbot and registers a systemd service (auto-start on boot)
+#
+# Only want to build and run it yourself (no Node install, no service)?
+# Use scripts/setup.sh instead — see README「Linux 安装脚本」.
+#
+
 echo "╔══════════════════════════════════════╗"
 echo "║       TSMusicBot Installer           ║"
 echo "╚══════════════════════════════════════╝"
@@ -11,6 +21,9 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
 INSTALL_DIR="/opt/tsmusicbot"
 SERVICE_NAME="tsmusicbot"
+# Node LTS line to install when a supported Node is missing. Keep in sync with
+# package.json "engines" and the floor check in setup.sh (#152).
+NODE_LTS_MAJOR=22
 
 # Verify we're in a valid project directory
 if [ ! -f "$PROJECT_DIR/package.json" ]; then
@@ -28,42 +41,66 @@ else
     exit 1
 fi
 
-echo "[1/6] Installing system dependencies..."
+# Supported: 22.12+ or 24+ (odd majors are excluded by better-sqlite3 and vitest).
+node_supported() {
+    command -v node &> /dev/null &&
+        node -e 'const v=process.versions.node.split(".").map(Number); process.exit((v[0]===22&&v[1]>=12)||v[0]>=24?0:1)'
+}
+
+echo "[1/5] Installing system dependencies..."
 case $OS in
     ubuntu|debian)
         sudo apt-get update -qq
-        sudo apt-get install -y -qq curl build-essential python3
+        sudo apt-get install -y -qq curl ca-certificates build-essential python3 ffmpeg
         ;;
-    centos|rhel|fedora)
+    centos|rhel|fedora|rocky|almalinux)
         sudo yum install -y curl gcc gcc-c++ make python3
         ;;
     arch|manjaro)
-        sudo pacman -S --noconfirm curl base-devel python
+        sudo pacman -S --noconfirm --needed curl base-devel python ffmpeg
         ;;
     *)
-        echo "Unsupported OS: $OS. Please install Node.js 20, build tools, and FFmpeg manually."
+        echo "Unsupported OS: $OS. Please install Node.js ${NODE_LTS_MAJOR}.12+ and build tools manually."
         ;;
 esac
 
-echo "[2/6] Installing Node.js 20 LTS..."
-if ! command -v node &> /dev/null || [[ $(node -v | cut -d. -f1 | tr -d 'v') -lt 20 ]]; then
-    curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
-    sudo apt-get install -y -qq nodejs 2>/dev/null || sudo yum install -y nodejs 2>/dev/null
+echo "[2/5] Installing Node.js ${NODE_LTS_MAJOR} LTS..."
+if node_supported; then
+    echo "Node.js $(node -v) already installed"
+else
+    case $OS in
+        ubuntu|debian)
+            curl -fsSL "https://deb.nodesource.com/setup_${NODE_LTS_MAJOR}.x" | sudo -E bash -
+            sudo apt-get install -y -qq nodejs
+            ;;
+        centos|rhel|fedora|rocky|almalinux)
+            curl -fsSL "https://rpm.nodesource.com/setup_${NODE_LTS_MAJOR}.x" | sudo bash -
+            sudo yum install -y nodejs
+            ;;
+        arch|manjaro)
+            sudo pacman -S --noconfirm --needed nodejs npm
+            ;;
+    esac
+    if ! node_supported; then
+        echo "Error: Node.js 22.12+ (or 24+) is required, found: $(node -v 2>/dev/null || echo none)."
+        echo "Install it from https://nodejs.org/ (or https://nodejs.cn/) and re-run this script."
+        exit 1
     fi
     echo "Node.js $(node -v) installed"
-
-echo "[3/6] Installing dependencies..."
-cd "$PROJECT_DIR"
-npm install
-if [ -d "$PROJECT_DIR/web/package.json" ] || [ -f "$PROJECT_DIR/web/package.json" ]; then
-    (cd "$PROJECT_DIR/web" && npm install)
 fi
 
-echo "[4/6] Building project..."
-npm run build
+echo "[3/5] Installing dependencies and building (scripts/setup.sh)..."
+bash "$SCRIPT_DIR/setup.sh"
 
-echo "[5/6] Copying to $INSTALL_DIR..."
+echo "[4/5] Copying to $INSTALL_DIR..."
+# Stop a running copy before replacing its files (re-install / upgrade).
+if systemctl is-active --quiet "$SERVICE_NAME" 2>/dev/null; then
+    sudo systemctl stop "$SERVICE_NAME"
+fi
 sudo mkdir -p "$INSTALL_DIR"
+# Replace build output wholesale so files removed upstream don't linger.
+# data/ (config, database, cookies) is never touched.
+sudo rm -rf "$INSTALL_DIR/dist" "$INSTALL_DIR/node_modules" "$INSTALL_DIR/web/dist"
 sudo cp -r "$PROJECT_DIR/dist" "$INSTALL_DIR/"
 sudo cp -r "$PROJECT_DIR/node_modules" "$INSTALL_DIR/"
 sudo cp "$PROJECT_DIR/package.json" "$INSTALL_DIR/"
@@ -72,13 +109,18 @@ if [ -d "$PROJECT_DIR/web/dist" ]; then
     sudo mkdir -p "$INSTALL_DIR/web"
     sudo cp -r "$PROJECT_DIR/web/dist" "$INSTALL_DIR/web/"
 fi
+# yt-dlp is looked up in bin/ next to dist/ before falling back to PATH
+if [ -d "$PROJECT_DIR/bin" ]; then
+    sudo cp -r "$PROJECT_DIR/bin" "$INSTALL_DIR/"
+fi
 # Copy scripts for future use
 sudo mkdir -p "$INSTALL_DIR/scripts"
 sudo cp -r "$PROJECT_DIR/scripts/"* "$INSTALL_DIR/scripts/" 2>/dev/null || true
 # Create data directory
 sudo mkdir -p "$INSTALL_DIR/data"
 
-echo "[6/6] Creating systemd service..."
+echo "[5/5] Creating systemd service..."
+NODE_BIN="$(command -v node)"
 sudo tee /etc/systemd/system/${SERVICE_NAME}.service > /dev/null <<EOL
 [Unit]
 Description=TSMusicBot - TeamSpeak Music Bot
@@ -88,7 +130,7 @@ After=network.target
 Type=simple
 User=root
 WorkingDirectory=${INSTALL_DIR}
-ExecStart=/usr/bin/node ${INSTALL_DIR}/dist/index.js
+ExecStart=${NODE_BIN} ${INSTALL_DIR}/dist/index.js
 Restart=on-failure
 RestartSec=5
 Environment=NODE_ENV=production
@@ -99,7 +141,7 @@ EOL
 
 sudo systemctl daemon-reload
 sudo systemctl enable ${SERVICE_NAME}
-sudo systemctl start ${SERVICE_NAME}
+sudo systemctl restart ${SERVICE_NAME}
 
 echo ""
 echo "╔══════════════════════════════════════╗"

scripts/setup.sh

@@ -21,7 +21,7 @@ echo ""
 
 # ---- Check Node.js ----
 if ! command -v node &>/dev/null; then
-    echo "[ERROR] Node.js not found. Please install Node.js 20+ from https://nodejs.org"
+    echo "[ERROR] Node.js not found. Please install Node.js 22.12+ LTS from https://nodejs.org"
     echo "        or https://nodejs.cn/ (China mirror)."
     exit 1
 fi

src/bot/instance.test.ts

@@ -1590,70 +1590,3 @@ describe("BotInstance Bilibili multi-P resolution", () => {
   });
 });
 
-
-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");
-  });
-});

src/bot/instance.ts

@@ -13,13 +13,7 @@ import {
   canRunCommand,
   type ParsedCommand,
 } from "./commands.js";
-import {
-  parseSongRef,
-  parseSelectionIndex,
-  parsePlaylistRef,
-  findShareShortLink,
-  resolveShareLink,
-} from "./song-ref.js";
+import { parseSongRef, parseSelectionIndex } from "./song-ref.js";
 import { splitTextIntoChunks } from "./text-chunk.js";
 import type { Logger } from "../logger.js";
 import { SHARED_QUEUE_OWNER, type BotDatabase, type ProfileConfig, type StoredSong } from "../data/database.js";
@@ -1519,21 +1513,8 @@ export class BotInstance extends EventEmitter {
   }
 
   private async cmdPlaylist(cmd: ParsedCommand, requesterName?: string): Promise<string> {
-    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);
+    if (!cmd.args) return "Usage: !playlist <playlist name or ID>";
+    const provider = this.getProvider(cmd.flags);
 
     // Determine if input is a direct ID (numeric / Jellyfin GUID) or a name search
     const id = this.extractId(cmd.args);
@@ -1541,9 +1522,7 @@ export class BotInstance extends EventEmitter {
 
     let playlistId: string;
 
-    if (ref) {
-      playlistId = ref.id;
-    } else if (isDirectId || id !== cmd.args) {
+    if (isDirectId || id !== cmd.args) {
       // Input is a direct ID or URL containing an ID — use existing logic
       playlistId = id;
     } else {

src/bot/song-ref.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect } from "vitest";
-import { parseSongRef, parseSelectionIndex, parsePlaylistRef, findShareShortLink, resolveShareLink } from "./song-ref.js";
+import { parseSongRef, parseSelectionIndex } from "./song-ref.js";
 
 describe("parseSongRef (#90 exact-song selection)", () => {
   it("returns null for a plain search term", () => {
@@ -120,65 +120,3 @@ 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();
-  });
-});

src/bot/song-ref.ts

@@ -1,5 +1,3 @@
-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
@@ -100,82 +98,3 @@ 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;
-  }
-}