Add the ability to hide irrelevant or empty categories in Xtream playlists.
Users can now manage category visibility through a dialog accessible from
the sidebar header in both VOD/Series and Live TV views.
Features:
- New category management dialog with search filter and select/deselect all
- Visibility settings persisted to database per playlist
- Hidden categories are filtered from sidebar navigation
- New categories added during playlist refresh default to visible
- Database migration for existing installations
Files changed:
- Database: schema.ts, connection.ts (hidden column + migration)
- Backend: category.events.ts, main.preload.ts (IPC handlers)
- Frontend: new dialog component, store method, UI integration
- Translations: en.json
- Documentation: docs/architecture/category-management.md