迁移播放记录到新数据结构，新增自动清理播放记录

src/lib/db.ts

@@ -182,6 +182,7 @@ export class DbManager {
     oidcSub?: string;
     enabledApis?: string[];
     created_at: number;
+    playrecord_migrated?: boolean;
   } | null> {
     if (typeof (this.storage as any).getUserInfoV2 === 'function') {
       return (this.storage as any).getUserInfoV2(userName);
@@ -259,6 +260,13 @@ export class DbManager {
     return [];
   }
 
+  // ---------- 播放记录迁移 ----------
+  async migratePlayRecords(userName: string): Promise<void> {
+    if (typeof (this.storage as any).migratePlayRecords === 'function') {
+      await (this.storage as any).migratePlayRecords(userName);
+    }
+  }
+
   // ---------- 数据迁移 ----------
   async migrateUsersFromConfig(adminConfig: AdminConfig): Promise<void> {
     if (typeof (this.storage as any).createUserV2 !== 'function') {