feat(desktop): 增加桌面端系统托盘和窗口管理功能

- 主函数中添加窗口管理初始化，支持Windows、Linux和MacOS平台
- HomeScreen中集成托盘服务和窗口服务，实现托盘菜单交互
- 实现窗口关闭时弹出对话框，支持最小化到托盘或退出程序
- 添加托盘服务TrayService，封装系统托盘图标和菜单的初始化、事件处理
- 添加窗口服务WindowService，实现窗口的显示、隐藏、关闭及事件监听
- 在界面添加最小化到托盘的按钮，仅桌面端显示
- pubspec.yaml添加assets目录，包含托盘图标资源文件

home_monitor/lib/screens/home_screen.dart

@@ -1,6 +1,9 @@
+import 'dart:io';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../providers/providers.dart';
+import '../services/services.dart';
 import '../widgets/widgets.dart';
 
 /// 主页面
@@ -12,6 +15,9 @@ class HomeScreen extends StatefulWidget {
 }
 
 class _HomeScreenState extends State<HomeScreen> {
+  final TrayService _trayService = TrayService();
+  final WindowService _windowService = WindowService();
+
   @override
   void initState() {
     super.initState();
@@ -21,9 +27,71 @@ class _HomeScreenState extends State<HomeScreen> {
       provider.initDefaultDevices();
       provider.refreshAll();
       provider.startAutoRefresh(intervalSeconds: 30);
+      
+      // 初始化系统托盘
+      _initSystemTray(provider);
     });
   }
 
+  /// 初始化系统托盘
+  Future<void> _initSystemTray(MonitorProvider provider) async {
+    if (!_trayService.isSupported) return;
+
+    await _trayService.init(
+      onShow: () => _windowService.showWindow(),
+      onHide: () => _windowService.hideWindow(),
+      onExit: () => _exitApp(),
+      onRefresh: () => provider.refreshAll(),
+    );
+
+    // 设置窗口关闭事件（最小化到托盘）
+    _windowService.onCloseRequested = () => _handleCloseRequest();
+  }
+
+  /// 处理窗口关闭请求
+  void _handleCloseRequest() {
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('关闭窗口'),
+        content: const Text('请选择操作：'),
+        actions: [
+          TextButton(
+            onPressed: () {
+              Navigator.pop(context);
+              _windowService.hideWindow();
+            },
+            child: const Text('最小化到托盘'),
+          ),
+          TextButton(
+            onPressed: () {
+              Navigator.pop(context);
+              _exitApp();
+            },
+            child: const Text('退出程序'),
+          ),
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('取消'),
+          ),
+        ],
+      ),
+    );
+  }
+
+  /// 退出应用
+  Future<void> _exitApp() async {
+    await _trayService.destroy();
+    await _windowService.closeWindow();
+  }
+
+  @override
+  void dispose() {
+    _trayService.destroy();
+    _windowService.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -60,6 +128,13 @@ class _HomeScreenState extends State<HomeScreen> {
           },
           tooltip: '设置',
         ),
+        // 最小化到托盘按钮（仅桌面端）
+        if (!kIsWeb && (Platform.isWindows || Platform.isLinux || Platform.isMacOS))
+          IconButton(
+            icon: const Icon(Icons.minimize),
+            onPressed: () => _windowService.hideWindow(),
+            tooltip: '最小化到托盘',
+          ),
       ],
     );
   }