Ports Tauri's behavior where clicking an album card's artist name
navigates to that artist (the card body still opens the album).
- AlbumCardItem gains artist-id; populated in every album-card
constructor (home/search/label/foryou/favorites). Artist-page
release cards leave it empty (their subtitle slot shows the year,
not the artist, so it stays non-clickable).
- AlbumCard wraps the artist name in a TouchArea that emits
media-action("artist", artist-id, "open") and brightens on hover
only when an id is known.
- main.rs handles ("artist","open") -> open the artist page;
FavoritesView (which only forwarded clicked) now forwards the
artist action.
cc