added tray menu

CursorLang/Services/SingleInstanceGate.cs

@@ -51,7 +51,17 @@ public sealed class SingleInstanceGate : IDisposable
     /// Takes the single-instance slot. When the application is already running, asks
     /// it to show itself and returns <c>false</c> — the caller is left to exit.
     /// </summary>
-    public bool TryAcquire()
+    public bool TryAcquire() => TryAcquire(showRunningInstance: true);
+
+    /// <summary>
+    /// The same, with a say in what is to happen to the application already running.
+    /// </summary>
+    /// <param name="showRunningInstance">
+    /// Whether the running application is to be brought up. A launch by Windows
+    /// itself passes <c>false</c>: it was not asked for a window, and the
+    /// application already in the tray is answer enough.
+    /// </param>
+    public bool TryAcquire(bool showRunningInstance)
     {
         _mutex = new Mutex(initiallyOwned: false, _mutexName);
 
@@ -73,8 +83,12 @@ public sealed class SingleInstanceGate : IDisposable
 
         if (!_isOwner)
         {
-            ForegroundPermissionNative.GrantToAnyProcess();
-            _activationRequest.Set();
+            if (showRunningInstance)
+            {
+                ForegroundPermissionNative.GrantToAnyProcess();
+                _activationRequest.Set();
+            }
+
             return false;
         }