feat: the Wanted view lists artists A–Z with their albums inside, each album's tracks a click away (M502 #5572)

The list runs like the library: artists by the library's sort name, each
artist's albums oldest first, grouped under the artist (linked into the
library when it holds them). A filter narrows it to an artist or album by
name, on the server, so it finds what has not been scrolled to. Tracks
opens an album's track list: the library's own for an album it holds, a
lost file marked, otherwise MusicBrainz's standard edition, named.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/lib/api/queries.ts

@@ -41,7 +41,8 @@ export const qk = {
     ['adminRequests', { status: status ?? 'all' }] as const,
   // Wanted list (M502 #5520). Wants sit under ['adminWants'] so one prefix
   // invalidation refreshes every tab and its counts.
-  adminWants:            (state: string) => ['adminWants', { state }] as const,
+  adminWants:            (state: string, q: string = '') => ['adminWants', { state, q }] as const,
+  wantTracks:            (id: string) => ['wantTracks', id] as const,
   adminFollows:          () => ['adminFollows'] as const,
   adminFollow:           (artistMbid: string) => ['adminFollow', artistMbid] as const,
   releaseProfiles:       () => ['releaseProfiles'] as const,