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/pages/Artists.tsx

@@ -14,6 +14,7 @@ import { usePerfProbeFlags } from '../utils/perf/perfFlags';
 import {
   ALL_SENTINEL,
   ALPHABET,
+  OTHER_BUCKET,
   ARTIST_LIST_LAST_IN_LETTER_EST,
   ARTIST_LIST_LETTER_ROW_EST,
   ARTIST_LIST_ROW_EST,
@@ -375,7 +376,7 @@ export default function Artists() {
                 onClick={() => setLetterFilter(l)}
                 className={`artists-alpha-btn${letterFilter === l ? ' artists-alpha-btn--active' : ''}`}
               >
-                {l === ALL_SENTINEL ? t('artists.all') : l}
+                {l === ALL_SENTINEL ? t('artists.all') : l === OTHER_BUCKET ? t('artists.other') : l}
               </button>
             ))}
           </div>