fix(Remote playback): kludge to scrub after stream move

src/lib/stores/music.ts

@@ -175,10 +175,20 @@ function createMusicStore() {
       const genres = await repo.getGenres(libraryId);
       if (genres.length === 0) return;
 
-      const hasCounts = genres.some(g => g.albumCount != null);
+      // Counts are only *useful* if they actually differentiate genres. Some
+      // servers return Fields=ItemCounts but populate every genre with the same
+      // value (or 0), which leaves the list in its original alphabetical order
+      // after "ranking" — so diversity selection seeds on the first genre and we
+      // get a wall of A-genres ("avangard", "avan-gard", ...) with no Rock.
+      // Treat that as "no usable counts" and fall through to the probe path,
+      // which ranks by genres' real album counts instead.
+      const positiveCounts = genres
+        .map(g => g.albumCount)
+        .filter((c): c is number => c != null && c > 0);
+      const hasUsefulCounts = new Set(positiveCounts).size > 1;
 
       let genreRows: GenreRow[];
-      if (hasCounts) {
+      if (hasUsefulCounts) {
         // Rank by reported count, pick a diverse subset, then fetch only those.
         const ranked = [...genres].sort(
           (a, b) => (b.albumCount ?? 0) - (a.albumCount ?? 0)
@@ -188,7 +198,8 @@ function createMusicStore() {
           row => row.items.length > 0
         );
       } else {
-        // No counts (offline, or a server that ignores Fields=ItemCounts).
+        // No usable counts (offline, a server that ignores Fields=ItemCounts,
+        // or one that returns uniform/zero counts — see hasUsefulCounts above).
         // The genre list is alphabetical, so probing the first N would only
         // ever surface A-genres. Sample at an even stride across the whole
         // list instead, so the probe pool spans A→Z; then drop empties, rank