style: reduce AppBar title font size to 16px for long titles

lib/screens/album_screen.dart

@@ -228,6 +228,7 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen> {
           style: TextStyle(
             color: colorScheme.onSurface,
             fontWeight: FontWeight.w600,
+            fontSize: 16,
           ),
           maxLines: 1,
           overflow: TextOverflow.ellipsis,

lib/screens/artist_screen.dart

@@ -341,7 +341,13 @@ return SliverAppBar(
         opacity: _showTitleInAppBar ? 1.0 : 0.0,
         child: Text(
           widget.artistName,
-          style: TextStyle(color: colorScheme.onSurface),
+          style: TextStyle(
+            color: colorScheme.onSurface,
+            fontWeight: FontWeight.w600,
+            fontSize: 16,
+          ),
+          maxLines: 1,
+          overflow: TextOverflow.ellipsis,
         ),
       ),
       flexibleSpace: FlexibleSpaceBar(

lib/screens/downloaded_album_screen.dart

@@ -313,6 +313,7 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
           style: TextStyle(
             color: colorScheme.onSurface,
             fontWeight: FontWeight.w600,
+            fontSize: 16,
           ),
           maxLines: 1,
           overflow: TextOverflow.ellipsis,

lib/screens/playlist_screen.dart

@@ -109,6 +109,7 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
           style: TextStyle(
             color: colorScheme.onSurface,
             fontWeight: FontWeight.w600,
+            fontSize: 16,
           ),
           maxLines: 1,
           overflow: TextOverflow.ellipsis,

lib/screens/track_metadata_screen.dart

@@ -152,6 +152,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
                 style: TextStyle(
                   color: colorScheme.onSurface,
                   fontWeight: FontWeight.w600,
+                  fontSize: 16,
                 ),
                 maxLines: 1,
                 overflow: TextOverflow.ellipsis,