准备进行首帧阻塞分析测试，需要先打一个commit

lib/main.dart

@@ -12,6 +12,9 @@ import 'widgets/global_mini_player.dart';
 
 final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
 
+// ═══════════════════════════════════════════════════
+// main: 只做 runApp，不做任何初始化
+// ═══════════════════════════════════════════════════
 void main() {
   WidgetsFlutterBinding.ensureInitialized();
 
@@ -24,45 +27,10 @@ void main() {
       child: const QTPlayerApp(),
     ),
   );
-
-  // ⭐ 首帧渲染完成后才执行初始化
-  WidgetsBinding.instance.addPostFrameCallback((_) {
-    _initializeServices();
-  });
-}
-
-void _initializeServices() async {
-  final lifecycle = AppLifecycleService();
-
-  try {
-    // 1. MediaKit
-    lifecycle.updateStatus(AppStatus.mediaKitInitializing);
-    MediaKit.ensureInitialized();
-    lifecycle.updateStatus(AppStatus.mediaKitReady);
-
-    // 2. PlaybackService
-    lifecycle.updateStatus(AppStatus.playerInitializing);
-    PlaybackService().init();
-    lifecycle.updateStatus(AppStatus.playerReady);
-
-    // 3. WebDAV
-    lifecycle.updateStatus(AppStatus.webdavChecking);
-    final hasCred = await WebDAVService.instance.loadCredentials();
-    if (hasCred) {
-      lifecycle.updateStatus(AppStatus.webdavReady);
-    } else {
-      lifecycle.updateStatus(AppStatus.webdavMissing);
-    }
-
-    lifecycle.updateStatus(AppStatus.fullReady);
-  } catch (e) {
-    debugPrint('❌ 初始化错误: $e');
-    lifecycle.updateStatus(AppStatus.error);
-  }
 }
 
 // ═══════════════════════════════════════════════════
-// RouteManager
+// RouteManager - 路由状态
 // ═══════════════════════════════════════════════════
 class RouteManager extends ChangeNotifier {
   static final RouteManager _instance = RouteManager._internal();
@@ -86,7 +54,7 @@ class RouteManager extends ChangeNotifier {
 }
 
 // ═══════════════════════════════════════════════════
-// 导航观察者
+// MiniPlayerNavigatorObserver - 路由监听
 // ═══════════════════════════════════════════════════
 class MiniPlayerNavigatorObserver extends NavigatorObserver {
   void _updateRoute(Route? route) {
@@ -111,14 +79,31 @@ class MiniPlayerNavigatorObserver extends NavigatorObserver {
 }
 
 // ═══════════════════════════════════════════════════
-// QTPlayerApp - 无状态，只负责组装
+// QTPlayerApp - 主应用
 // ═══════════════════════════════════════════════════
-class QTPlayerApp extends StatelessWidget {
+class QTPlayerApp extends StatefulWidget {
   const QTPlayerApp({super.key});
 
+  @override
+  State<QTPlayerApp> createState() => _QTPlayerAppState();
+}
+
+class _QTPlayerAppState extends State<QTPlayerApp> {
+  @override
+  void initState() {
+    super.initState();
+
+    // 首帧完成后才开始初始化
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      debugPrint('🖼️ Flutter 首帧已完成');
+      _initializeServices();
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
-    debugPrint('🔥 QTPlayerApp.build() 执行，首帧即将渲染');
+    debugPrint('🎨 QTPlayerApp.build()');
+
     return MaterialApp(
       title: '清听',
       theme: ThemeData(
@@ -162,3 +147,34 @@ class QTPlayerApp extends StatelessWidget {
     );
   }
 }
+
+// ═══════════════════════════════════════════════════
+// 后台初始化 - 在首帧完成后执行
+// ═══════════════════════════════════════════════════
+void _initializeServices() async {
+  final lifecycle = AppLifecycleService();
+
+  try {
+    lifecycle.updateStatus(AppStatus.mediaKitInitializing);
+    MediaKit.ensureInitialized();
+    lifecycle.updateStatus(AppStatus.mediaKitReady);
+
+    lifecycle.updateStatus(AppStatus.playerInitializing);
+    PlaybackService().init();
+    lifecycle.updateStatus(AppStatus.playerReady);
+
+    lifecycle.updateStatus(AppStatus.webdavChecking);
+    final hasCred = await WebDAVService.instance.loadCredentials();
+    if (hasCred) {
+      lifecycle.updateStatus(AppStatus.webdavReady);
+    } else {
+      lifecycle.updateStatus(AppStatus.webdavMissing);
+    }
+
+    lifecycle.updateStatus(AppStatus.fullReady);
+    debugPrint('✅ 应用完全就绪');
+  } catch (e) {
+    debugPrint('❌ 初始化错误: $e');
+    lifecycle.updateStatus(AppStatus.error);
+  }
+}