fix(artist): align top-track covers with album grid cover path (#886)

* fix(artist): align top-track covers with album grid cover path

Top tracks now resolve album.id + album.coverArt like AlbumCard, use
the same useAlbumCoverRef/CoverArtImage dense pipeline, and batch-warm
covers on page load instead of a custom sparse resolver.

* docs: CHANGELOG and credits for PR #886 artist top-track covers

* fix(artist): match All Albums cover warm tier and prefetch on detail page

Warm top-track and discography covers at dense grid tier (140px) instead of
32px thumb tier so disk peek hits cached WebP. Register high-priority dense
prefetch like All Albums and ensure top-track cells at high priority so dense
defer-until-visible does not stall visible thumbs.

* fix(artist): satisfy tsc for top-track cover warm helpers

Use optional coverArt access in pushAlbumWarmRow and align album pick
types with topSongAlbumForCover (id + name + coverArt).

src/cover/resolveEntry.ts

@@ -98,10 +98,10 @@ export function coverEntryToRef(
   };
 }
 
-/** Artist top tracks: prefer album row `coverArt` when the grid already has it. */
 /** @deprecated Alias for {@link resolveSongFetchCoverArtId}. */
 export const resolveSubsonicSongCoverArtId = resolveSongFetchCoverArtId;
 
+/** @deprecated Top tracks use album row `id` + `coverArt` like AlbumCard. */
 export function resolveArtistPageSongFetchCoverArtId(
   song: Pick<SubsonicSong, 'id' | 'coverArt' | 'albumId' | 'album' | 'discNumber'>,
   albums: ReadonlyArray<Pick<SubsonicAlbum, 'id' | 'name' | 'coverArt'>>,