fix: RC3 queue link underline, genre album artist split, Artists "Other" bucket (#977)

* fix: RC3 queue link underline, genre album artist split, Artists "Other" bucket

Three zunoz reports, one change:

- Queue now-playing card: the artist and album links now underline on hover
  (not just recolour), matching clickable names everywhere else. The album
  link sits on .queue-current-sub itself; artist links are nested .is-link
  spans — both selectors covered.

- Genre album cards split multi-artist credits into individual links like the
  rest of the app. Root cause was the local-index genre query hardcoding NULL
  for the album raw_json column, so OpenSubsonic artists[] never reached the
  card and it fell back to the flat "A • B" single link. Select a.raw_json
  instead (parity with the All Albums / advanced-search album queries).

- Artists page alphabet index: # is now digits-only, and a new "Other" bucket
  collects accented Latin (Æ/Ø/Å…) and non-Latin scripts (CJK, Cyrillic, …)
  that previously fell into the # catch-all. Adds artistBucketKey/compareBuckets
  helpers (unit-tested), an OTHER bucket sorted last, and the artists.other
  label across 9 locales.

* docs(changelog): queue link hover, genre card artist split, Artists Other bucket (#977)

src/styles/layout/queue-panel.css

@@ -224,11 +224,17 @@
   transition: color var(--transition-fast);
 }
 
-.queue-current-sub.is-link {
+/* Album link sits on the .queue-current-sub element itself; artist links are
+   .is-link spans nested inside it (OpenArtistRefInline). Both get the same
+   accent + underline affordance on hover as clickable names everywhere else. */
+.queue-current-sub.is-link,
+.queue-current-sub .is-link {
   cursor: pointer;
 }
-.queue-current-sub.is-link:hover {
+.queue-current-sub.is-link:hover,
+.queue-current-sub .is-link:hover {
   color: var(--accent);
+  text-decoration: underline;
 }
 
 .queue-current-enrichment {