Phase 4: 全局快捷键拦截 (Win32 API)

- 新增 HotKeyManager (Helpers/), 使用 user32.dll RegisterHotKey/UnregisterHotKey 注册系统级快捷键

- 支持 Ctrl/Alt/Shift/Win 修饰键组合, 单字符键和命名键(F1-F12等)解析

- MainWindow.OnSourceInitialized 挂载 HwndSource.AddHook 拦截 WM_HOTKEY 消息

- 启动时自动注册所有含快捷键的工具, 工具增删改后自动重新注册

- 快捷键冲突时记录 Win32 错误码, 无效格式打印警告

- 新增 12 个 HotKeyManager 单元测试 (73 tests total)

PersonalToolBox.Tests/ViewModels/MainViewModelTests.cs

@@ -1,5 +1,6 @@
 using Moq;
 using Microsoft.Extensions.DependencyInjection;
+using PersonalToolBox.Helpers;
 using PersonalToolBox.Models;
 using PersonalToolBox.Services;
 using PersonalToolBox.ViewModels;
@@ -12,6 +13,7 @@ public class MainViewModelTests
     private readonly Mock<IDataService> _dataServiceMock = new();
     private readonly Mock<IProcessExecutionService> _processServiceMock = new();
     private readonly Mock<IServiceProvider> _serviceProviderMock = new();
+    private readonly Mock<HotKeyManager> _hotKeyManagerMock;
     private readonly AppConfig _config;
 
     public MainViewModelTests()
@@ -33,11 +35,13 @@ public class MainViewModelTests
             ]
         };
 
+        _hotKeyManagerMock = new Mock<HotKeyManager>(_logServiceMock.Object, _processServiceMock.Object);
         _dataServiceMock.Setup(d => d.Config).Returns(_config);
     }
 
     private MainViewModel CreateViewModel() =>
-        new(_logServiceMock.Object, _dataServiceMock.Object, _processServiceMock.Object, _serviceProviderMock.Object);
+        new(_logServiceMock.Object, _dataServiceMock.Object, _processServiceMock.Object,
+            _serviceProviderMock.Object, _hotKeyManagerMock.Object);
 
     [Fact]
     public void Constructor_LoadsCategories_IncludingAll()