- Rewrite favorite_service.dart with proper error handling, auth checks, and timeouts
- Add error state UI to favorites_screen.dart with retry button
- Add SnackBar feedback on toggle failures in home/search/detail screens
- Type-safe parsing with per-item error handling to prevent crashes
- Clean orphan favorite records from database
- Add debugPrint logging for troubleshooting
- All changes maintain backward compatibility
micko samawa