Phase 5: 系统托盘与开机自启

- 系统托盘: NotifyIcon 常驻, 程序化生成 32x32 图标, 左键切换显示/隐藏, 右键菜单(显示主界面/设置/彻底退出)

- 窗口关闭拦截: OnClosing 取消关闭改为 Hide(), 退出菜单执行真实 Shutdown()

- 开机自启: AutoStartHelper 写入/删除 HKCU\...\Run 注册表项, UI 开关按钮显示 ✔/⊗ 状态

- 静默启动: -autostart 参数下 mainWindow.Hide() 直接最小化到托盘

- 类型冲突解决: ImplicitUsings=disable + GlobalUsings.cs 统一全局 using, 消除 WPF/WinForms 共享类型冲突

- 测试: 75 tests total (含 AutoStartHelper 2 tests)

PersonalToolBox/GlobalUsings.cs

@@ -0,0 +1,20 @@
+global using System;
+global using System.Collections.Generic;
+global using System.Collections.ObjectModel;
+global using System.Collections.Specialized;
+global using System.ComponentModel;
+global using System.Diagnostics;
+global using System.IO;
+global using System.Linq;
+global using System.Runtime.InteropServices;
+global using System.Threading;
+global using System.Threading.Tasks;
+global using System.Windows;
+global using System.Windows.Controls;
+global using System.Windows.Data;
+global using System.Windows.Input;
+global using System.Windows.Interop;
+global using System.Windows.Media;
+global using System.Windows.Threading;
+global using Microsoft.Extensions.DependencyInjection;
+global using Microsoft.Win32;