### Added
- Personal discovery support for Last.fm and ListenBrainz to fetch user-specific top/recommended artists.
- Profile fields for Last.fm username, ListenBrainz username and user token, with UI controls to add or remove the token.
- Sidebar controls, spinners and socket events to initiate and stream personal recommendations.
- Database migration adding user columns for listening service integration.
### Changed
- Recommendation flow now streams seed artists, deduplicates against the user's library, and presents missing/skip feedback.
- Session and socket logic extended to emit per-user service availability and detailed error/ack responses.
- Service initialization wires up Last.fm and ListenBrainz clients and broadcasts availability state to connected sessions.
### Fixed
- Ensures personal discovery state and UI refresh after profile updates and when opening the sidebar so availability is accurate.
### Security
- ListenBrainz token handling added with an option to clear the stored token; token input is treated as a secret in the UI.
