fix(ui): 加入歌单弹层不再被迷你播放器遮挡

原因：迷你播放器挂在 Navigator overlay 上，层级高于底部弹层，
弹层里的歌单列表被它盖住，看起来像"没读到歌单"。
（日志确认查询正常：读到 1 个歌单）

- RouteManager 抽到 services/route_manager.dart，新增临时隐藏开关
- 打开"加入歌单"弹层时隐藏迷你播放器，关闭后恢复
- main.dart 的 shouldShow 改用 showMiniPlayer（原来直接读路由，开关不生效）
- 弹层底部加 SafeArea minimum + 16px 余量，不再贴着手势区

真机验证：弹层正常显示 "TL / 1 首"，底部留出安全距离。

lib/main.dart

@@ -7,6 +7,7 @@ import 'package:permission_handler/permission_handler.dart';
 
 import 'package:flutter/services.dart';
 import 'services/audio_service.dart';
+import 'services/route_manager.dart';
 import 'services/playback_service.dart';
 import 'services/app_lifecycle_service.dart';
 import 'services/webdav_service.dart';
@@ -107,28 +108,6 @@ void main() async {
   });
 }
 
-// ════════════════════════════════════════════════════════════
-// 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 =>
-      _currentRoute != '/player' && _currentRoute != '/playlist';
-
-  void updateRoute(String route) {
-    if (_currentRoute != route) {
-      _currentRoute = route;
-      debugPrint('📌 路由更新: $route');
-      notifyListeners();
-    }
-  }
-}
 
 // ════════════════════════════════════════════════════════════
 // 导航观察者（监听路由变化）
@@ -399,8 +378,7 @@ class _QTPlayerAppState extends State<QTPlayerApp> {
                 animation: RouteManager(),
                 builder: (context, _) {
                   final routeManager = RouteManager();
-                  final shouldShow = routeManager.currentRoute != '/player' &&
+                  final shouldShow = routeManager.showMiniPlayer;
-                      routeManager.currentRoute != '/playlist';
 
                   return AnimatedSwitcher(
                     duration: const Duration(milliseconds: 300),
@@ -436,4 +414,4 @@ class _QTPlayerAppState extends State<QTPlayerApp> {
       ),
     );
   }
-}
+}

lib/pages/home_page.dart

@@ -436,9 +436,18 @@ class _HomePageState extends BaseState<HomePage> {
       delegate: SliverChildBuilderDelegate(
         (context, index) {
           final song = _favorites[index];
-          return AnimatedOpacity(
+          return TweenAnimationBuilder<double>(
-            opacity: 1.0,
+            key: ValueKey('fav-$_homeTab-$index'),
-            duration: const Duration(milliseconds: 150),
+            tween: Tween(begin: 0.0, end: 1.0),
+            duration: const Duration(milliseconds: 240),
+            curve: Curves.easeOutCubic,
+            builder: (context, t, child) => Opacity(
+              opacity: t,
+              child: Transform.translate(
+                offset: Offset(0, (1 - t) * 10),
+                child: child,
+              ),
+            ),
             child: Padding(
               padding: const EdgeInsets.symmetric(vertical: 2),
               child: ListTile(
@@ -515,8 +524,20 @@ class _HomePageState extends BaseState<HomePage> {
       delegate: SliverChildBuilderDelegate(
         (context, index) {
           final playlist = _playlistSummaries[index];
-          return Padding(
+          return TweenAnimationBuilder<double>(
-            padding: const EdgeInsets.symmetric(vertical: 2),
+            key: ValueKey('pl-$_homeTab-$index'),
+            tween: Tween(begin: 0.0, end: 1.0),
+            duration: const Duration(milliseconds: 240),
+            curve: Curves.easeOutCubic,
+            builder: (context, t, child) => Opacity(
+              opacity: t,
+              child: Transform.translate(
+                offset: Offset(0, (1 - t) * 10),
+                child: child,
+              ),
+            ),
+            child: Padding(
+              padding: const EdgeInsets.symmetric(vertical: 2),
             child: ListTile(
               contentPadding: EdgeInsets.zero,
               visualDensity: VisualDensity.compact,
@@ -561,7 +582,8 @@ class _HomePageState extends BaseState<HomePage> {
                 if (mounted) safeSetState(() {});
               },
             ),
-          );
+          ),
+        );
         },
         childCount: _playlistSummaries.length,
       ),

lib/services/route_manager.dart

@@ -0,0 +1,34 @@
+// lib/services/route_manager.dart
+import 'package:flutter/foundation.dart';
+
+/// 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;
+
+  /// 弹层/对话框打开时临时隐藏迷你播放器，避免盖住内容
+  bool _temporarilyHidden = false;
+
+  bool get showMiniPlayer =>
+      !_temporarilyHidden &&
+      _currentRoute != '/player' &&
+      _currentRoute != '/playlist';
+
+  void setTemporarilyHidden(bool hidden) {
+    if (_temporarilyHidden == hidden) return;
+    _temporarilyHidden = hidden;
+    notifyListeners();
+  }
+
+  void updateRoute(String route) {
+    if (_currentRoute != route) {
+      _currentRoute = route;
+      debugPrint('📌 路由更新: $route');
+      notifyListeners();
+    }
+  }
+}

lib/widgets/add_to_playlist_sheet.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 
 import '../models/playlist_summary.dart';
 import '../repositories/playlist_repository.dart';
+import '../services/route_manager.dart';
 
 /// 把一首歌加入歌单的底部弹层。
 ///
@@ -26,11 +27,14 @@ Future<void> showAddToPlaylistSheet(
   }
   if (!context.mounted) return;
 
+  RouteManager().setTemporarilyHidden(true);
+  try {
   await showModalBottomSheet<void>(
     context: context,
     backgroundColor: const Color(0xFF1A1F1E),
     builder: (sheetContext) {
       return SafeArea(
+        minimum: const EdgeInsets.only(bottom: 12),
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
@@ -109,12 +113,15 @@ Future<void> showAddToPlaylistSheet(
                   },
                 ),
               ),
-            const SizedBox(height: 8),
+            const SizedBox(height: 16),
           ],
         ),
       );
     },
   );
+  } finally {
+    RouteManager().setTemporarilyHidden(false);
+  }
 }
 
 Future<void> _createPlaylistAndAdd(
@@ -163,4 +170,4 @@ Future<void> _createPlaylistAndAdd(
       SnackBar(content: Text('新建歌单失败: $e')),
     );
   }
-}
+}