🐛 Bug fixes and optimization

lib/screens/library/view.dart

@@ -3,6 +3,7 @@ import 'package:get/get.dart';
 import 'package:rhythm_box/providers/auth.dart';
 import 'package:rhythm_box/widgets/no_login_fallback.dart';
 import 'package:rhythm_box/widgets/playlist/user_playlist_list.dart';
+import 'package:rhythm_box/widgets/sized_container.dart';
 
 class LibraryScreen extends StatefulWidget {
   const LibraryScreen({super.key});
@@ -18,16 +19,22 @@ class _LibraryScreenState extends State<LibraryScreen> {
   Widget build(BuildContext context) {
     return Material(
       color: Theme.of(context).colorScheme.surface,
-      child: SafeArea(
-        child: Obx(() {
+      child: Scaffold(
+        appBar: AppBar(
+          title: const Text('Library'),
+          centerTitle: MediaQuery.of(context).size.width >= 720,
+        ),
+        body: Obx(() {
           if (_authenticate.auth.value == null) {
             return const NoLoginFallback();
           }
 
-          return const Column(
-            children: [
-              Expanded(child: UserPlaylistList()),
-            ],
+          return const CenteredContainer(
+            child: Column(
+              children: [
+                Expanded(child: UserPlaylistList()),
+              ],
+            ),
           );
         }),
       ),

lib/widgets/lyrics/synced_lyrics.dart

@@ -48,10 +48,31 @@ class _SyncedLyricsState extends State<SyncedLyrics> {
   Color get _unFocusColor =>
       Theme.of(context).colorScheme.onSurface.withOpacity(0.5);
 
+  void _syncLyricsProgress() {
+    for (var idx = 0; idx < _lyric!.lyrics.length; idx++) {
+      final lyricSlice = _lyric!.lyrics[idx];
+      final lyricNextSlice =
+          idx + 1 < _lyric!.lyrics.length ? _lyric!.lyrics[idx + 1] : null;
+      final isActive = _playback.durationCurrent.value.inSeconds >=
+              lyricSlice.time.inSeconds &&
+          (lyricNextSlice == null ||
+              lyricNextSlice.time.inSeconds >
+                  _playback.durationCurrent.value.inSeconds);
+      if (isActive) {
+        _autoScrollController.scrollToIndex(
+          idx,
+          preferPosition: AutoScrollPosition.middle,
+        );
+      }
+    }
+  }
+
   @override
   void initState() {
     super.initState();
-    _pullLyrics();
+    _pullLyrics().then((_) {
+      _syncLyricsProgress();
+    });
     _subscriptions = [
       _playback.state.listen((value) {
         if (value.activeTrack == null) return;