- Skip metadata writing for flac files to prevent file corruption
- FLAC files have strict header requirements where writing metadata after download can corrupt the sync code and make files unplayable
- Update download_manager_provider.dart to check for both weba and flac extensions
- Update server/routes/playback.dart to check for both weba and flac extensions
- Add explanatory comments documenting why metadata writing is skipped for these formats
- Refactor extension checking to use variable assignment for clarity