fix: 修复启动隐藏与深色主题界面问题

修复托盘退出卡死、启动隐藏闪窗和隐藏实例再次启动无法唤醒的问题。

统一深色主题资源与控件模板，补齐卡片、内置图标、右键菜单和弹窗背景样式。

验证：dotnet build PersonalToolbox.sln；dotnet run --project tests\PersonalToolbox.Tests\PersonalToolbox.Tests.csproj。

src/PersonalToolbox/ViewModels/ToolCardViewModel.cs

@@ -33,16 +33,16 @@ public sealed class ToolCardViewModel : ObservableObject
     public bool ShowDescription => _settings.ShowToolDescriptions;
     public double CardWidth => _settings.CardSize switch
     {
-        "Small" => 178,
-        "Large" => 248,
-        _ => 210
+        "Small" => 220,
+        "Large" => 320,
+        _ => 260
     };
 
     public double CardHeight => _settings.CardSize switch
     {
-        "Small" => 126,
-        "Large" => 172,
-        _ => 146
+        "Small" => 132,
+        "Large" => 178,
+        _ => 154
     };
 
     public string TypeLabel => Tool.Type switch