feat(bot): load custom avatar on instance startup

Thread AvatarStore from index.ts → BotManager → BotInstance so every
BotInstance reads the persisted custom avatar from disk at construction
time and hands it to BotProfileManager via setCustomAvatar.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/bot/instance.ts

@@ -16,6 +16,7 @@ import type { Logger } from "../logger.js";
 import type { BotDatabase, ProfileConfig } from "../data/database.js";
 import type { BotConfig } from "../data/config.js";
 import { BotProfileManager } from "./profile.js";
+import type { AvatarStore } from "../data/avatars.js";
 
 export interface BotInstanceOptions {
   id: string;
@@ -28,6 +29,7 @@ export interface BotInstanceOptions {
   database: BotDatabase;
   config: BotConfig;
   logger: Logger;
+  avatarStore: AvatarStore;
 }
 
 export interface BotStatus {
@@ -57,6 +59,7 @@ export class BotInstance extends EventEmitter {
   private database: BotDatabase;
   private config: BotConfig;
   private logger: Logger;
+  private avatarStore: AvatarStore;
   private connected = false;
   private disconnectEmitted = false;
   private voteSkipUsers = new Set<string>();
@@ -77,6 +80,7 @@ export class BotInstance extends EventEmitter {
     this.database = options.database;
     this.config = options.config;
     this.logger = options.logger.child({ botId: this.id });
+    this.avatarStore = options.avatarStore;
 
     this.tsClient = new TS3Client(options.tsOptions, this.logger);
     this.player = new AudioPlayer(this.logger);
@@ -90,6 +94,12 @@ export class BotInstance extends EventEmitter {
       options.tsOptions.nickname,
     );
 
+    const relPath = this.database.getCustomAvatarPath(this.id);
+    if (relPath) {
+      const buf = this.avatarStore.read(relPath);
+      if (buf) this.profileManager.setCustomAvatar(buf);
+    }
+
     this.setupPlayerEvents();
     this.setupTsEvents();
   }