目前调通了120全局，准备开始介入播放层，在修bug

lib/services/playback_service.dart

@@ -0,0 +1,28 @@
+import 'package:media_kit/media_kit.dart';
+import 'package:media_kit/media_kit.dart' as media_kit;
+
+class PlaybackService {
+  static final PlaybackService _instance = PlaybackService._();
+  factory PlaybackService() => _instance;
+  PlaybackService._();
+
+  late final Player _player;
+  bool get isInitialized => _player.state.playing;
+
+  void init() {
+    _player = Player();
+  }
+
+  Future<void> play(String url) async {
+    await _player.open(Media(url));
+    await _player.play();
+  }
+
+  void pause() => _player.pause();
+  void resume() => _player.play();
+  void stop() => _player.stop();
+  void dispose() => _player.dispose();
+
+  // 状态流
+  Stream<PlayerState> get stateStream => _player.stream;
+}

lib/services/player_service.dart

@@ -0,0 +1,21 @@
+import 'package:media_kit/media_kit.dart';
+
+class PlayerService {
+  static final PlayerService _instance = PlayerService._internal();
+  factory PlayerService() => _instance;
+  PlayerService._internal();
+
+  final Player _player = Player();
+
+  void play(String url) {
+    _player.open(Media(url));
+  }
+
+  void pause() => _player.pause();
+  void resume() => _player.play();
+  void stop() => _player.stop();
+
+  void dispose() => _player.dispose();
+
+  // 状态监听...
+}

lib/services/webdav_service.dart

@@ -0,0 +1,103 @@
+import 'package:webdav_client/webdav_client.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class WebDAVService {
+  static const String _keyBaseUrl = 'webdav_base_url';
+  static const String _keyUsername = 'webdav_username';
+  static const String _keyPassword = 'webdav_password';
+
+  static WebDAVService? _instance;
+  static WebDAVService get instance => _instance ??= WebDAVService._();
+
+  WebDAVService._();
+
+  WebDAVClient? _client;
+  String? _baseUrl;
+
+  bool get isConnected => _client != null;
+
+  // 保存凭据
+  Future<void> saveCredentials(
+      String baseUrl, String username, String password) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_keyBaseUrl, baseUrl);
+    await prefs.setString(_keyUsername, username);
+    await prefs.setString(_keyPassword, password);
+    _baseUrl = baseUrl;
+    _client = WebDAVClient(
+      baseUri: Uri.parse(baseUrl),
+      credentials: '$username:$password',
+    );
+  }
+
+  // 加载已保存的凭据
+  Future<bool> loadCredentials() async {
+    final prefs = await SharedPreferences.getInstance();
+    final baseUrl = prefs.getString(_keyBaseUrl);
+    final username = prefs.getString(_keyUsername);
+    final password = prefs.getString(_keyPassword);
+    if (baseUrl != null && username != null && password != null) {
+      _baseUrl = baseUrl;
+      _client = WebDAVClient(
+        baseUri: Uri.parse(baseUrl),
+        credentials: '$username:$password',
+      );
+      return true;
+    }
+    return false;
+  }
+
+  // 清除凭据
+  Future<void> clearCredentials() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_keyBaseUrl);
+    await prefs.remove(_keyUsername);
+    await prefs.remove(_keyPassword);
+    _client = null;
+    _baseUrl = null;
+  }
+
+  // 获取音乐文件列表（仅 .mp3 .flac .m4a .ape .wav）
+  Future<List<WebDAVFileItem>> getMusicFiles({String path = '/'}) async {
+    if (_client == null) throw Exception('WebDAV 未连接');
+
+    final items = await _client!.listAll(recursive: true);
+    final musicExtensions = ['.mp3', '.flac', '.m4a', '.ape', '.wav', '.opus'];
+
+    return items
+        .where((item) =>
+            item.isFile &&
+            musicExtensions.any((ext) => item.path.toLowerCase().endsWith(ext)))
+        .map((item) => WebDAVFileItem(
+              path: item.path,
+              name: item.path.split('/').last,
+              size: item.size,
+              modified: item.modified,
+            ))
+        .toList();
+  }
+
+  // 获取文件的完整下载 URL（用于播放）
+  String getFileUrl(String path) {
+    if (_baseUrl == null) throw Exception('WebDAV 未配置');
+    // 确保 baseUrl 末尾有 '/'
+    final base = _baseUrl!.endsWith('/') ? _baseUrl! : '$_baseUrl/';
+    // 去掉路径开头的 '/'
+    final cleanPath = path.startsWith('/') ? path.substring(1) : path;
+    return '$base$cleanPath';
+  }
+}
+
+class WebDAVFileItem {
+  final String path;
+  final String name;
+  final int? size;
+  final DateTime? modified;
+
+  WebDAVFileItem({
+    required this.path,
+    required this.name,
+    this.size,
+    this.modified,
+  });
+}