feat: album names use Navidrome sortName tag when showRomaji is on

dispAlbumName now takes the full album object and reads album.sortName
directly — no kuromoji fallback, no backend translation.
dispAlbum (song context) also drops the kuromoji fallback, keeping only
the sortAlbum/albumSort file tag.

Override list → Navidrome sort tag → raw Japanese name.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/api.js

@@ -178,11 +178,15 @@ export function dispArtistById(id, name) {
   if (sort) return sort;
   return _artistRomajiMap?.get(String(id)) || name || '';
 }
-export function dispAlbumName(name) {
-  if (!S.cfg.showRomaji) return name || '';
+// Takes a full album object so it can read the Navidrome sortName tag.
+export function dispAlbumName(album) {
+  const name = album?.name || '';
+  if (!S.cfg.showRomaji) return name;
   const ov = getRomajiOverrides();
   if (name && ov[name]) return ov[name];
-  return _albumRomajiMap?.get(name) || name || '';
+  const sort = album?.sortName;
+  if (sort && !_isJp(sort)) return sort;
+  return name;
 }
 
 // Synchronous lookup — returns index entry for a song ID, or null if not in index.
@@ -215,7 +219,7 @@ export function dispAlbum(s) {
   if (s.album && ov[s.album]) return ov[s.album];
   const st = s.sortAlbum || s.albumSort;
   if (st && !_isJp(st)) return st;
-  return romajiLookup(s.id)?.albumRomaji || s.album || '';
+  return s.album || '';
 }
 // Returns [{name, id}] like parseArtists but with romaji display names when showRomaji is on.
 // Multi-artist romaji is collapsed into one entry since we can't reliably split the converted string.