- Add SearchAlbumResult struct to Go backend
- Add album search to Deezer SearchAll() function (returns albums alongside tracks/artists)
- Change artist display from horizontal scroll to vertical list style (consistent with extension search)
- Add SearchAlbum class and searchAlbums field to TrackState
- Add _SearchArtistItemWidget and _SearchAlbumItemWidget for vertical list display
- Add _navigateToSearchAlbum method for navigating to album details
- Remove old horizontal artist scroll (_buildArtistSearchResults, _buildArtistCard)
Now default search (Deezer/Spotify) shows Artists, Albums, and Songs in the same vertical list style as extension search results.