页面层级与返回逻辑实现完成，并且去掉web相关代码支持

lib/pages/home_page.dart

@@ -1,4 +1,3 @@
-// lib/pages/home_page.dart
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../services/audio_service.dart';
@@ -7,7 +6,6 @@ import '../services/playback_service.dart';
 import '../widgets/magnetic_scroll_physics.dart';
 import 'webdav_setup_page.dart';
 import 'webdav_file_list_page.dart';
-import 'dart:async';
 
 // ==================================================
 // 歌曲数据模型
@@ -171,7 +169,6 @@ class _HomePageState extends State<HomePage> {
     return (offset / _mediaLibraryHeight).clamp(0.0, 1.0);
   }
 
-  // 媒体库透明度（快速淡出）
   double get _mediaOpacity {
     final p = _progress;
     if (p <= 0.3) {
@@ -181,7 +178,6 @@ class _HomePageState extends State<HomePage> {
     }
   }
 
-  // 列表展开程度
   double get _listReveal {
     if (_progress <= 0.7) return 0.0;
     return (_progress - 0.7) / 0.3;
@@ -204,7 +200,6 @@ class _HomePageState extends State<HomePage> {
     super.dispose();
   }
 
-  // ========== 高度测量（带重试限制） ==========
   void _measureMediaLibraryHeight() {
     final renderBox =
         _mediaLibraryKey.currentContext?.findRenderObject() as RenderBox?;
@@ -231,12 +226,10 @@ class _HomePageState extends State<HomePage> {
     }
   }
 
-  // ========== 滚动监听 ==========
   void _onScroll() {
     if (mounted) setState(() {});
   }
 
-  // ========== 初始化 WebDAV ==========
   Future<void> _initWebDAV() async {
     setState(() => _isLoading = true);
     try {
@@ -249,14 +242,10 @@ class _HomePageState extends State<HomePage> {
     }
   }
 
-  // ============================================================
-  // ⭐ 核心：播放方法（UI 优先响应，然后真正播放）
-  // ============================================================
   void _playSong(SongItem song) async {
     try {
       final url = WebDAVService.instance.getFileUrl(song.path);
 
-      // 1️⃣ 先更新 UI（立即响应）
       final audioService = context.read<AudioService>();
       audioService.playSong(Song(
         id: song.path,
@@ -265,11 +254,9 @@ class _HomePageState extends State<HomePage> {
         url: url,
       ));
 
-      // 2️⃣ 动态获取认证头
       final headers = await WebDAVService.instance.getAuthHeaders();
 
       if (headers.isEmpty) {
-        print('⚠️ 未获取到认证头，请检查 WebDAV 登录状态');
         if (mounted) {
           ScaffoldMessenger.of(context).showSnackBar(
             const SnackBar(
@@ -281,10 +268,6 @@ class _HomePageState extends State<HomePage> {
         return;
       }
 
-      print('🎵 [收藏列表] 播放 URL: $url');
-      print('📋 [收藏列表] 认证头已设置: ${headers.keys}');
-
-      // 3️⃣ 播放
       await PlaybackService().play(url, headers: headers);
     } catch (e) {
       if (mounted) {
@@ -298,7 +281,6 @@ class _HomePageState extends State<HomePage> {
     }
   }
 
-  // ========== 重置磁吸状态 ==========
   void _resetSnapState() {
     if (_scrollController.hasClients) {
       _scrollController.jumpTo(0.0);
@@ -306,21 +288,15 @@ class _HomePageState extends State<HomePage> {
     setState(() {});
   }
 
-  // ================================================================
-  // Build
-  // ================================================================
   @override
   Widget build(BuildContext context) {
     final isConnected = WebDAVService.instance.isConnected;
     final username = WebDAVService.instance.username ?? '点击连接';
-    final audioService = context.watch<AudioService>();
-    final showMiniBar = audioService.currentSong != null;
 
     return Scaffold(
       backgroundColor: const Color(0xFF0E1211),
       body: Column(
         children: [
-          // ---- 固定标题 "清听" ----
           SafeArea(
             bottom: false,
             child: Padding(
@@ -344,8 +320,6 @@ class _HomePageState extends State<HomePage> {
               ),
             ),
           ),
-
-          // ---- 滚动区域 ----
           Expanded(
             child: CustomScrollView(
               controller: _scrollController,
@@ -356,7 +330,6 @@ class _HomePageState extends State<HomePage> {
                     )
                   : const ClampingScrollPhysics(),
               slivers: [
-                // ---- 媒体库 ----
                 SliverToBoxAdapter(
                   child: Opacity(
                     opacity: _mediaOpacity,
@@ -551,8 +524,6 @@ class _HomePageState extends State<HomePage> {
                     ),
                   ),
                 ),
-
-                // ---- "我的收藏" Sticky Header ----
                 SliverPersistentHeader(
                   pinned: true,
                   delegate: _StickyHeaderDelegate(
@@ -578,13 +549,11 @@ class _HomePageState extends State<HomePage> {
                     ),
                   ),
                 ),
-
-                // ---- 收藏列表 ----
                 SliverPadding(
-                  padding: EdgeInsets.only(
+                  padding: const EdgeInsets.only(
                     left: 20,
                     right: 20,
-                    bottom: showMiniBar ? 80.0 : 20.0,
+                    bottom: 20,
                   ),
                   sliver: _isLoading
                       ? const SliverFillRemaining(