- API endpoint: /api/admin/import/official/sync-all - Fetches all official Habbo furnidata - Compares with database to find missing items - Imports missing items via SSE batch with progress reporting - 500 item limit for safety - Proper abort signal support - Client component: OfficialSyncClient with progress UI - Updated StudioSyncPage to include Official Furnidata sync option - Uses existing importSingleFurni infrastructure