client: Windows 客户端（WinUI3 壳 + agent-core；调试用 Electron 壳存档）；localserver token 改为常数时间比较

client/ui/Services/SimpleCommand.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Windows.Input;
+
+namespace EveryPublish.Client.Services;
+
+/// <summary>极简 ICommand 实现（托盘命令用，免 CommunityToolkit 依赖）</summary>
+public class SimpleCommand : ICommand
+{
+    private readonly Action _action;
+
+    public SimpleCommand(Action action)
+    {
+        _action = action;
+    }
+
+    public event EventHandler? CanExecuteChanged { add { } remove { } }
+
+    public bool CanExecute(object? parameter) => true;
+
+    public void Execute(object? parameter) => _action();
+}