Drop the albums_count line from the artist card (Tauri #169: Qobuz's count
includes compilations/tributes and is misleadingly high) — removed from
ArtistCard, map_artist, FavoriteArtistItem and FavArtistCard. Shrink the card
image to a 120px circle to match Tauri. Add derive_artists (name-substring
search filter → artists-visible/artists-shown), seeded on load; grouping +
the alpha strip layer on next.
cc