feat: Claude Code 原生 Windows 通知（C# / .NET 10 + Avalonia 12）

为 Claude Code 提供原生 Windows toast 通知：点击跳回原窗口、切回 Windows Terminal 标签、跨虚拟桌面、调用方图标、非阻塞投递；NativeAOT 单文件分发。
2026-06-22 18:05:15 +08:00
commit 5ce2c8a982
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+using System;
+
+namespace Notify.Interop;
+
+/// <summary>
+/// 把目标窗口拉回前台
+///
+/// Windows 限制后台进程抢焦点，这里用一套组合技绕过：ALT 键模拟 +
+/// AttachThreadInput 把当前线程与前台/目标线程的输入队列挂接 +
+/// SetWindowPos/BringWindowToTop/SwitchToThisWindow/SetForegroundWindow 多管齐下
+/// </summary>
+public static class WindowActivator
+{
+    public static bool Activate(IntPtr hwnd)
+    {
+        if (hwnd == IntPtr.Zero || !Win32.IsWindow(hwnd))
+        {
+            return false;
+        }
+
+        try
+        {
+            // 最小化的先还原
+            if (Win32.IsIconic(hwnd))
+            {
+                Win32.ShowWindow(hwnd, Win32.SW_RESTORE);
+            }
+
+            var foreground = Win32.GetForegroundWindow();
+            var curThread = Win32.GetCurrentThreadId();
+            var fgThread = Win32.GetWindowThreadProcessId(foreground, out _);
+            var targetThread = Win32.GetWindowThreadProcessId(hwnd, out _);
+
+            // 模拟一次 ALT 抬起，满足 Windows 的"防焦点抢占"前置条件
+            Win32.keybd_event(Win32.VK_MENU, 0, 0, IntPtr.Zero);
+            Win32.keybd_event(Win32.VK_MENU, 0, Win32.KEYEVENTF_KEYUP, IntPtr.Zero);
+
+            if (fgThread != curThread)
+            {
+                Win32.AttachThreadInput(curThread, fgThread, true);
+            }
+
+            if (targetThread != curThread && targetThread != fgThread)
+            {
+                Win32.AttachThreadInput(curThread, targetThread, true);
+            }
+
+            Win32.AllowSetForegroundWindow(Win32.ASFW_ANY);
+            Win32.SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, Win32.SWP_NOMOVE | Win32.SWP_NOSIZE | Win32.SWP_SHOWWINDOW);
+            Win32.BringWindowToTop(hwnd);
+            Win32.SwitchToThisWindow(hwnd, true);
+            Win32.SetForegroundWindow(hwnd);
+            Win32.ShowWindow(hwnd, Win32.SW_SHOW);
+
+            if (targetThread != curThread && targetThread != fgThread)
+            {
+                Win32.AttachThreadInput(curThread, targetThread, false);
+            }
+
+            if (fgThread != curThread)
+            {
+                Win32.AttachThreadInput(curThread, fgThread, false);
+            }
+
+            return Win32.GetForegroundWindow() == hwnd;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+}