Backend (Rust):
- Create session_store module with SQLite database
- Store queue tracks, current index, position, volume, shuffle/repeat
- Add Tauri commands: save_session_state, load_session_state, etc.
- Use WAL mode for better concurrent access
Frontend (TypeScript):
- Create sessionService.ts with save/load functions
- Restore session after login (queue, track info, volume, modes)
- Save session on beforeunload and visibility change
- Clear session on logout
- Debounced position saving during playback
Users can now close the app and resume where they left off.