播放页部分调整，完整播放链路层级已打通

lib/pages/player_page.dart

@@ -2,15 +2,17 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../services/audio_service.dart';
-import '../main.dart'; // ✅ 导入 navigatorKey
-import 'playlist_page.dart'; // ✅ 导入 PlaylistPage
+import '../main.dart';
+import 'playlist_page.dart';
 
 class PlayerPage extends StatefulWidget {
   final VoidCallback onClose;
+  final VoidCallback onOpenPlaylist;
 
   const PlayerPage({
     super.key,
     required this.onClose,
+    required this.onOpenPlaylist,
   });
 
   @override
@@ -81,7 +83,7 @@ class _PlayerPageState extends State<PlayerPage> {
         elevation: 0,
         leading: IconButton(
           icon: const Icon(Icons.arrow_back_ios_new, color: Colors.white),
-          onPressed: widget.onClose, // ✅ 使用回调关闭
+          onPressed: widget.onClose,
         ),
         title: const Text(
           '正在播放',
@@ -93,17 +95,6 @@ class _PlayerPageState extends State<PlayerPage> {
         ),
         centerTitle: true,
         actions: [
-          IconButton(
-            icon:
-                const Icon(Icons.playlist_play_outlined, color: Colors.white54),
-            onPressed: () {
-              navigatorKey.currentState?.push(
-                MaterialPageRoute(
-                  builder: (_) => const PlaylistPage(),
-                ),
-              );
-            },
-          ),
           IconButton(
             icon: const Icon(Icons.more_vert, color: Colors.white54),
             onPressed: () {},
@@ -309,6 +300,15 @@ class _PlayerPageState extends State<PlayerPage> {
                   color: service.hasQueue ? Colors.white60 : Colors.grey[600],
                   padding: const EdgeInsets.all(12),
                 ),
+                IconButton(
+                  onPressed: widget.onOpenPlaylist,
+                  icon: const Icon(
+                    Icons.playlist_play_outlined,
+                    color: Color(0xFFB8D4D0),
+                    size: 26,
+                  ),
+                  padding: const EdgeInsets.all(8),
+                ),
                 const SizedBox(width: 4),
               ],
             ),