fix(admin): update genre counts after song modifications

app/admin/page.tsx

@@ -420,6 +420,7 @@ export default function AdminPage() {
         setFiles([]);
         setIsUploading(false);
         fetchSongs();
+        fetchGenres();
 
         // Auto-trigger categorization after uploads
         const successCount = results.filter(r => r.success).length;
@@ -481,6 +482,7 @@ export default function AdminPage() {
             setUploadedSong(null);
             setUploadGenreIds([]);
             fetchSongs();
+            fetchGenres();
             setMessage(prev => prev + '\n✅ Genres assigned successfully!');
         } else {
             alert('Failed to assign genres');
@@ -519,6 +521,7 @@ export default function AdminPage() {
         if (res.ok) {
             setEditingId(null);
             fetchSongs();
+            fetchGenres();
         } else {
             alert('Failed to update song');
         }
@@ -537,6 +540,7 @@ export default function AdminPage() {
 
         if (res.ok) {
             fetchSongs();
+            fetchGenres();
         } else {
             alert('Failed to delete song');
         }