权限配置暂时到此，后台播放问题并入生命周期管理同步开发

lib/main.dart

@@ -1,32 +1,59 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'package:media_kit/media_kit.dart';
+//import 'package:audio_service/audio_service.dart' as audio_service;
+import 'package:permission_handler/permission_handler.dart';
+
 import 'services/audio_service.dart';
 import 'services/playback_service.dart';
 import 'services/app_lifecycle_service.dart';
 import 'services/webdav_service.dart';
+import 'services/audio_player_handler.dart';
 import 'pages/home_page.dart';
 import 'pages/player_page.dart';
 import 'pages/playlist_page.dart';
 import 'widgets/global_mini_player.dart';
 
 final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
-
-// ⏱️ 全局计时器
 final stopwatch = Stopwatch();
 
-void main() {
+// ⭐ 防止 Hot Restart / 热重载时重复初始化
+bool _appInitialized = false;
+
+// ⭐ 全局缓存 Handler
+AudioPlayerHandler? _audioHandler;
+
+void main() async {
+  // ⭐ P0：防止重复初始化
+  if (_appInitialized) {
+    debugPrint('⏱️ main 已初始化，跳过重复执行');
+    return;
+  }
+  _appInitialized = true;
+
   stopwatch.start();
   debugPrint('⏱️ T0 main: ${stopwatch.elapsedMilliseconds}ms');
 
   WidgetsFlutterBinding.ensureInitialized();
   debugPrint('⏱️ T0.5 ensureInitialized: ${stopwatch.elapsedMilliseconds}ms');
 
+  // ⭐ MediaKit 在 runApp 前初始化（官方要求）
+  try {
+    MediaKit.ensureInitialized();
+    debugPrint('⏱️ T0.6 MediaKit 初始化完成');
+  } catch (e) {
+    debugPrint('❌ MediaKit 初始化失败: $e');
+  }
+
+  // ⭐ 创建 Handler（AudioService 稍后初始化）
+  _audioHandler = AudioPlayerHandler();
+
   runApp(
     MultiProvider(
       providers: [
         ChangeNotifierProvider(create: (_) => AudioService()),
         ChangeNotifierProvider(create: (_) => AppLifecycleService()),
+        Provider<AudioPlayerHandler>(create: (_) => _audioHandler!),
       ],
       child: const QTPlayerApp(),
     ),
@@ -35,13 +62,15 @@ void main() {
   debugPrint('⏱️ T0.8 runApp 完成: ${stopwatch.elapsedMilliseconds}ms');
 }
 
+// ════════════════════════════════════════════════════════════
+// 路由管理器（控制 MiniPlayer 显示/隐藏）
+// ════════════════════════════════════════════════════════════
 class RouteManager extends ChangeNotifier {
   static final RouteManager _instance = RouteManager._internal();
   factory RouteManager() => _instance;
   RouteManager._internal();
 
   String _currentRoute = '/';
-
   String get currentRoute => _currentRoute;
 
   bool get showMiniPlayer =>
@@ -56,6 +85,9 @@ class RouteManager extends ChangeNotifier {
   }
 }
 
+// ════════════════════════════════════════════════════════════
+// 导航观察者（监听路由变化）
+// ════════════════════════════════════════════════════════════
 class MiniPlayerNavigatorObserver extends NavigatorObserver {
   void _updateRoute(Route? route) {
     final name = route?.settings.name ?? '/';
@@ -78,6 +110,9 @@ class MiniPlayerNavigatorObserver extends NavigatorObserver {
   }
 }
 
+// ════════════════════════════════════════════════════════════
+// 主应用
+// ════════════════════════════════════════════════════════════
 class QTPlayerApp extends StatefulWidget {
   const QTPlayerApp({super.key});
 
@@ -86,21 +121,123 @@ class QTPlayerApp extends StatefulWidget {
 }
 
 class _QTPlayerAppState extends State<QTPlayerApp> {
+  bool _isInitializing = false;
+
+  // ============================================================
+  // 生命周期
+  // ============================================================
   @override
   void initState() {
     super.initState();
+
     debugPrint('⏱️ T1.5 initState: ${stopwatch.elapsedMilliseconds}ms');
 
     WidgetsBinding.instance.addPostFrameCallback((_) {
       debugPrint('⏱️ T2 首帧回调: ${stopwatch.elapsedMilliseconds}ms');
-      _initializeServices();
+      _startBackgroundInitialization();
     });
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+  }
+
+  // ============================================================
+  // 后台初始化（不阻塞首帧）
+  // ============================================================
+  Future<void> _startBackgroundInitialization() async {
+    if (_isInitializing) return;
+    _isInitializing = true;
+
+    debugPrint('⏱️ T3 后台初始化开始');
+
+    // 1. PlaybackService（轻量级）
+    try {
+      PlaybackService().init();
+      debugPrint('⏱️ T3.1 PlaybackService 初始化完成');
+    } catch (e) {
+      debugPrint('❌ PlaybackService 初始化失败: $e');
+    }
+
+    // 2. ⭐ AudioService 暂时禁用（等 MainActivity 改为 AudioServiceActivity 后启用）
+    // await _initAudioService();
+
+    // 3. WebDAV
+    await _initWebDAV();
+
+    // 4. 通知权限
+    await _requestPermissions();
+
+    debugPrint('⏱️ T4 全部初始化完成');
+  }
+
+  // ════════════════════════════════════════════════════════════
+  // 子初始化方法
+  // ════════════════════════════════════════════════════════════
+
+  // ⭐ 暂时禁用，等 MainActivity 改为 AudioServiceActivity 后启用
+  // Future<void> _initAudioService() async {
+  //   try {
+  //     await audio_service.AudioService.init(
+  //       builder: () => _audioHandler!,
+  //       config: const audio_service.AudioServiceConfig(
+  //         androidNotificationChannelId: 'com.example.qt_player.music',
+  //         androidNotificationChannelName: '清听音乐播放',
+  //         androidNotificationOngoing: true,
+  //         androidStopForegroundOnPause: true,
+  //       ),
+  //     );
+  //     debugPrint('✅ AudioService 初始化完成');
+  //   } catch (e) {
+  //     debugPrint('❌ AudioService 初始化失败: $e');
+  //   }
+  // }
+
+  Future<void> _initWebDAV() async {
+    try {
+      final hasCred = await WebDAVService.instance.loadCredentials();
+      debugPrint('✅ WebDAV 加载完成, 已连接: $hasCred');
+    } catch (e) {
+      debugPrint('❌ WebDAV 加载失败: $e');
+    }
+  }
+
+  Future<void> _requestPermissions() async {
+    try {
+      if (await Permission.notification.isDenied) {
+        final status = await Permission.notification.request();
+        debugPrint('📢 通知权限状态: $status');
+      }
+    } catch (e) {
+      debugPrint('❌ 权限申请失败: $e');
+    }
+  }
+
+  // ============================================================
+  // Build
+  // ============================================================
   @override
   Widget build(BuildContext context) {
     debugPrint('⏱️ T1 build: ${stopwatch.elapsedMilliseconds}ms');
 
+    // 监听歌曲变化，更新通知栏
+    final audioService = context.watch<AudioService>();
+    final handler = context.read<AudioPlayerHandler>();
+    final song = audioService.currentSong;
+
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (song != null) {
+        handler.updateNotification(
+          id: song.id,
+          title: song.title,
+          artist: song.artist,
+        );
+      } else {
+        handler.mediaItem.add(null);
+      }
+    });
+
     return MaterialApp(
       title: '清听',
       theme: ThemeData(
@@ -144,35 +281,3 @@ class _QTPlayerAppState extends State<QTPlayerApp> {
     );
   }
 }
-
-void _initializeServices() async {
-  debugPrint('⏱️ T3 开始初始化: ${stopwatch.elapsedMilliseconds}ms');
-  final lifecycle = AppLifecycleService();
-
-  try {
-    lifecycle.updateStatus(AppStatus.mediaKitInitializing);
-    MediaKit.ensureInitialized();
-    debugPrint('⏱️ T4 MediaKit 完成: ${stopwatch.elapsedMilliseconds}ms');
-    lifecycle.updateStatus(AppStatus.mediaKitReady);
-
-    lifecycle.updateStatus(AppStatus.playerInitializing);
-    PlaybackService().init();
-    debugPrint('⏱️ T5 Player 完成: ${stopwatch.elapsedMilliseconds}ms');
-    lifecycle.updateStatus(AppStatus.playerReady);
-
-    lifecycle.updateStatus(AppStatus.webdavChecking);
-    final hasCred = await WebDAVService.instance.loadCredentials();
-    debugPrint('⏱️ T6 WebDAV 完成: ${stopwatch.elapsedMilliseconds}ms');
-    if (hasCred) {
-      lifecycle.updateStatus(AppStatus.webdavReady);
-    } else {
-      lifecycle.updateStatus(AppStatus.webdavMissing);
-    }
-
-    lifecycle.updateStatus(AppStatus.fullReady);
-    debugPrint('✅ 应用完全就绪: ${stopwatch.elapsedMilliseconds}ms');
-  } catch (e) {
-    debugPrint('❌ 初始化错误: $e');
-    lifecycle.updateStatus(AppStatus.error);
-  }
-}