diff --git a/lib/controllers/playback_controller.dart b/lib/controllers/playback_controller.dart
index 26da116..2f4d8e3 100644
--- a/lib/controllers/playback_controller.dart
+++ b/lib/controllers/playback_controller.dart
@@ -1,4 +1,5 @@
 // lib/controllers/playback_controller.dart
+import 'package:flutter/foundation.dart'; // ⭐ 添加
 import '../services/audio_service.dart';
 import '../services/webdav_service.dart';
 import '../database/song_database.dart';
@@ -12,27 +13,43 @@ class PlaybackController {
   final SongDatabase _db = SongDatabase();
 
   // ════════════════════════════════════════════════════════════
-  // 播放 WebDAV 目录中的歌曲（从点击歌曲开始）
+  // 从 WebDAV 目录播放（点击歌曲）
   // ════════════════════════════════════════════════════════════
   Future<void> playFromWebDAV({
     required String directoryPath,
     required String clickedSongPath,
     required List<WebDAVItem> allItems,
   }) async {
-    final musicFiles = allItems.where((item) => !item.isDirectory).toList();
+    // 1. 过滤出所有音乐文件（去掉目录）
+    final musicFiles = allItems.where((item) => !item.isDirectory).toList()
+      ..sort((a, b) => a.name.toLowerCase().compareTo(b.name.toLowerCase()));
+
     if (musicFiles.isEmpty) return;
 
+    // 2. 调试信息
+    debugPrint('🎯 [PlaybackController] musicFiles:');
+    for (int i = 0; i < musicFiles.length; i++) {
+      debugPrint('  $i: ${musicFiles[i].path}');
+    }
+    debugPrint('🎯 [PlaybackController] clickedSongPath: $clickedSongPath');
+
+    // 3. 找到点击歌曲在音乐文件列表中的位置
     final clickedIndex =
         musicFiles.indexWhere((item) => item.path == clickedSongPath);
+    debugPrint('🎯 [PlaybackController] clickedIndex: $clickedIndex');
+
     if (clickedIndex == -1) {
+      debugPrint(
+          '⚠️ [PlaybackController] clicked song not found, fallback to single play');
       await _playSingleSong(clickedSongPath);
       return;
     }
 
+    // 4. 构建 Song 队列
     final queue = await _buildSongQueue(musicFiles);
 
+    // 5. 应用播放模式
     final playMode = _audioService.playMode;
-    // ⭐ 修复：显式指定类型
     List<Song> finalQueue = List<Song>.from(queue);
     int startIndex = clickedIndex;
 
@@ -43,23 +60,27 @@ class PlaybackController {
       finalQueue = shuffled;
     }
 
+    debugPrint(
+        '🎯 [PlaybackController] finalQueue length: ${finalQueue.length}, startIndex: $startIndex');
+
     _audioService.setQueue(finalQueue, startIndex: startIndex);
   }
 
   // ════════════════════════════════════════════════════════════
-  // 播放整个目录（从第一首开始）
+  // 从 WebDAV 目录播放（全部播放）
   // ════════════════════════════════════════════════════════════
   Future<void> playAllFromWebDAV({
     required String directoryPath,
     required List<WebDAVItem> allItems,
   }) async {
-    final musicFiles = allItems.where((item) => !item.isDirectory).toList();
+    final musicFiles = allItems.where((item) => !item.isDirectory).toList()
+      ..sort((a, b) => a.name.toLowerCase().compareTo(b.name.toLowerCase()));
+
     if (musicFiles.isEmpty) return;
 
     final queue = await _buildSongQueue(musicFiles);
 
     final playMode = _audioService.playMode;
-    // ⭐ 修复：显式指定类型
     List<Song> finalQueue = List<Song>.from(queue);
     if (playMode == PlayMode.shuffle) {
       finalQueue = List<Song>.from(queue)..shuffle();
@@ -69,9 +90,10 @@ class PlaybackController {
   }
 
   // ════════════════════════════════════════════════════════════
-  // 播放单曲（fallback）
+  // 单曲播放（fallback）
   // ════════════════════════════════════════════════════════════
   Future<void> _playSingleSong(String songPath) async {
+    debugPrint('🎯 [PlaybackController] _playSingleSong: $songPath');
     final url = WebDAVService.instance.getFileUrl(songPath);
     final dbSong = await _db.getSongByPath(songPath);
     final song = Song(
@@ -85,7 +107,7 @@ class PlaybackController {
   }
 
   // ════════════════════════════════════════════════════════════
-  // 辅助方法：从音乐文件列表构建 Song 队列
+  // 构建 Song 队列
   // ════════════════════════════════════════════════════════════
   Future<List<Song>> _buildSongQueue(List<WebDAVItem> musicFiles) async {
     final queue = <Song>[];
@@ -113,19 +135,10 @@ class PlaybackController {
   }
 
   // ════════════════════════════════════════════════════════════
-  // 播放控制（透传到 AudioService）
+  // 播放控制透传
   // ════════════════════════════════════════════════════════════
-  void next() {
-    _audioService.next();
-  }
-
-  void previous() {
-    _audioService.previous();
-  }
-
-  void togglePlayMode() {
-    _audioService.togglePlayMode();
-  }
-
+  void next() => _audioService.next();
+  void previous() => _audioService.previous();
+  void togglePlayMode() => _audioService.togglePlayMode();
   PlayMode get playMode => _audioService.playMode;
 }
diff --git a/lib/pages/webdav_file_list_page.dart b/lib/pages/webdav_file_list_page.dart
index c42708a..5c5e024 100644
--- a/lib/pages/webdav_file_list_page.dart
+++ b/lib/pages/webdav_file_list_page.dart
@@ -1,9 +1,6 @@
 // lib/pages/webdav_file_list_page.dart
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
 import '../services/webdav_service.dart';
-import '../services/playback_service.dart';
-import '../services/audio_service.dart';
 import '../constants/ui_constants.dart';
 import '../base/base_state.dart';
 import '../controllers/playback_controller.dart';
@@ -79,12 +76,11 @@ class _WebDAVFileListPageState extends BaseState<WebDAVFileListPage> {
     );
   }
 
-// ============================================================
-// 播放单首（点击歌曲）
-// ============================================================
+  // ============================================================
+  // ⭐ 播放单首（使用 PlaybackController）
+  // ============================================================
   void _playSong(WebDAVItem file) async {
     try {
-      // ⭐ 直接使用 PlaybackController 单例
       await PlaybackController().playFromWebDAV(
         directoryPath: _currentPath,
         clickedSongPath: file.path,
@@ -112,12 +108,11 @@ class _WebDAVFileListPageState extends BaseState<WebDAVFileListPage> {
     }
   }
 
-// ============================================================
-// 全部播放
-// ============================================================
+  // ============================================================
+  // ⭐ 全部播放（使用 PlaybackController）
+  // ============================================================
   void _playAll() async {
     try {
-      // ⭐ 全部播放使用 playAllFromWebDAV
       await PlaybackController().playAllFromWebDAV(
         directoryPath: _currentPath,
         allItems: _items,
diff --git a/lib/services/app_lifecycle_manager.dart b/lib/services/app_lifecycle_manager.dart
index 166ca4c..24d370a 100644
--- a/lib/services/app_lifecycle_manager.dart
+++ b/lib/services/app_lifecycle_manager.dart
@@ -1,8 +1,5 @@
 // lib/services/app_lifecycle_manager.dart
-import 'dart:async';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:media_kit/media_kit.dart';
 
 /// App 生命周期状态（扩展了 Flutter 原生状态）
 enum AppLifecycleStatus {
diff --git a/lib/services/audio_service.dart b/lib/services/audio_service.dart
index 31fcf41..8be63c5 100644
--- a/lib/services/audio_service.dart
+++ b/lib/services/audio_service.dart
@@ -3,14 +3,15 @@ import 'dart:async';
 import 'dart:io';
 import 'dart:typed_data';
 import 'package:flutter/material.dart';
-import 'package:media_kit/media_kit.dart' as media_kit; // ⭐ 加别名
+import 'package:media_kit/media_kit.dart' as media_kit;
 import 'package:path_provider/path_provider.dart';
 import 'playback_service.dart';
 import '../metadata/metadata_service.dart';
 import '../database/song_database.dart';
 import '../utils/artwork_helper.dart';
 import '../repositories/playlist_repository.dart';
-import '../models/playlist.dart'; // ⭐ 你的 Playlist 模型
+import '../models/playlist.dart';
+import 'webdav_service.dart';
 
 enum PlayMode {
   sequential,
@@ -116,7 +117,6 @@ class AudioService extends ChangeNotifier {
     }
     notifyListeners();
 
-    // ⭐ 如果有当前歌单，同步更新歌单的播放模式
     if (_currentPlaylistId != null) {
       _playlistRepo.updatePlaylistPlayMode(_currentPlaylistId!, _playMode);
     }
@@ -154,7 +154,6 @@ class AudioService extends ChangeNotifier {
 
   // ---- 播放指定歌曲 ----
   Future<void> playSong(Song song) async {
-    // 播放单曲时清除歌单上下文
     _currentPlaylistId = null;
     if (_queue.isEmpty || _queue[_currentIndex].id != song.id) {
       setQueue([song], startIndex: 0);
@@ -167,21 +166,17 @@ class AudioService extends ChangeNotifier {
   // 播放歌单
   // ════════════════════════════════════════════════════════════
 
-  /// 播放整个歌单
   Future<void> playPlaylist(String playlistId, {int startIndex = 0}) async {
     _currentPlaylistId = playlistId;
 
-    // 1. 获取歌单的播放模式
     final playlist = await _playlistRepo.getPlaylist(playlistId);
     if (playlist != null) {
       _playMode = playlist.playMode;
     }
 
-    // 2. 获取歌单歌曲 ID 列表
     final songIds = await _playlistRepo.getPlaylistSongIds(playlistId);
     if (songIds.isEmpty) return;
 
-    // 3. 将 song_id 转换为 Song 对象
     final songs = <Song>[];
     for (final id in songIds) {
       final dbSong = await _db.getSongByPath(id);
@@ -193,7 +188,6 @@ class AudioService extends ChangeNotifier {
           url: dbSong['remote_path'] as String,
         ));
       } else {
-        // 如果 songs 表中没有记录，用路径作为 fallback
         songs.add(Song(
           id: id,
           title: id.split('/').last.replaceAll(RegExp(r'\.[^.]*$'), ''),
@@ -208,19 +202,17 @@ class AudioService extends ChangeNotifier {
     }
   }
 
-  /// 将当前播放队列保存为歌单
   Future<Playlist> saveQueueAsPlaylist(String name) async {
-    // ⭐ 等待 createPlaylist 返回 Playlist 对象
     final playlist = await _playlistRepo.createPlaylist(name);
     for (int i = 0; i < _queue.length; i++) {
       final song = _queue[i];
       await _playlistRepo.addSong(playlist.id, song.id);
     }
-    return playlist; // ⭐ 直接返回 Playlist 对象
+    return playlist;
   }
 
   // ════════════════════════════════════════════════════════════
-  // 播放核心
+  // ⭐ 播放核心（修复：自动添加认证头）
   // ════════════════════════════════════════════════════════════
 
   void _playCurrent() {
@@ -242,17 +234,37 @@ class AudioService extends ChangeNotifier {
       return;
     }
 
-    PlaybackService().play(song.url!);
+    // ⭐ 关键修复：播放时自动添加认证头
+    _playWithHeaders(song.url!);
 
     _syncPlayerStateDelayed();
 
-    // ⭐ 立即推送基本信息（无 artwork）
     _onSongChanged?.call(song);
-
-    // ⭐ 异步加载完整 metadata（含 artwork）
     _loadMetadataForCurrentSong(generation);
   }
 
+  /// ⭐ 播放带认证头的 URL
+  Future<void> _playWithHeaders(String url) async {
+    final headers = await _getAuthHeadersForUrl(url);
+    await PlaybackService().play(url, headers: headers);
+  }
+
+  /// ⭐ 获取 URL 对应的认证头（WebDAV 需要，本地文件不需要）
+  Future<Map<String, String>> _getAuthHeadersForUrl(String url) async {
+    if (url.startsWith('http://') || url.startsWith('https://')) {
+      try {
+        final headers = await WebDAVService.instance.getAuthHeaders();
+        if (headers.isNotEmpty) {
+          debugPrint('🔑 [AudioService] 已添加认证头到播放请求');
+          return headers;
+        }
+      } catch (e) {
+        debugPrint('⚠️ [AudioService] 获取认证头失败: $e');
+      }
+    }
+    return {};
+  }
+
   String _generateSongKey(String url, int fileSize, int modifiedTime) {
     final raw = '$url|$fileSize|$modifiedTime';
     return raw.hashCode.toString();