fix.修ci，修融合桌面，修启动器

LanMountainDesktop.Tests/SingleInstanceServiceTests.cs

@@ -0,0 +1,102 @@
+using System;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+using LanMountainDesktop.Services;
+using Xunit;
+
+namespace LanMountainDesktop.Tests;
+
+public sealed class SingleInstanceServiceTests
+{
+    [Fact]
+    public async Task TryNotifyPrimaryInstance_ReturnsTrue_WhenPrimaryAcknowledges()
+    {
+        var mutexName = $"Local\\LanMountainDesktop.Tests.SingleInstance.{Guid.NewGuid():N}";
+        var pipeName = $"LanMountainDesktop.Tests.Activate.{Guid.NewGuid():N}";
+
+        using var primary = CreateService(mutexName, pipeName);
+        using var secondary = CreateSecondaryService(mutexName, pipeName);
+        Assert.True(primary.IsPrimaryInstance);
+        MarkAsSecondaryForTest(secondary);
+
+        var activated = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
+        primary.StartActivationListener(() => activated.TrySetResult());
+
+        var acknowledged = secondary.TryNotifyPrimaryInstance(TimeSpan.FromSeconds(2), out var failureReason);
+
+        Assert.True(acknowledged);
+        Assert.Null(failureReason);
+
+        var completed = await Task.WhenAny(activated.Task, Task.Delay(TimeSpan.FromSeconds(2)));
+        Assert.Same(activated.Task, completed);
+    }
+
+    [Fact]
+    public void TryNotifyPrimaryInstance_ReturnsFalse_WhenListenerIsNotRunning()
+    {
+        var mutexName = $"Local\\LanMountainDesktop.Tests.SingleInstance.{Guid.NewGuid():N}";
+        var pipeName = $"LanMountainDesktop.Tests.Activate.{Guid.NewGuid():N}";
+
+        using var primary = CreateService(mutexName, pipeName);
+        using var secondary = CreateSecondaryService(mutexName, pipeName);
+        Assert.True(primary.IsPrimaryInstance);
+        MarkAsSecondaryForTest(secondary);
+
+        var acknowledged = secondary.TryNotifyPrimaryInstance(TimeSpan.FromMilliseconds(300), out var failureReason);
+
+        Assert.False(acknowledged);
+        Assert.False(string.IsNullOrWhiteSpace(failureReason));
+    }
+
+    private static SingleInstanceService CreateService(string mutexName, string pipeName)
+    {
+        var ctor = typeof(SingleInstanceService).GetConstructor(
+            BindingFlags.Instance | BindingFlags.NonPublic,
+            binder: null,
+            [typeof(string), typeof(string)],
+            modifiers: null);
+
+        Assert.NotNull(ctor);
+        return (SingleInstanceService)ctor!.Invoke([mutexName, pipeName]);
+    }
+
+    private static SingleInstanceService CreateSecondaryService(string mutexName, string pipeName)
+    {
+        SingleInstanceService? created = null;
+        Exception? creationError = null;
+        var thread = new Thread(() =>
+        {
+            try
+            {
+                created = CreateService(mutexName, pipeName);
+            }
+            catch (Exception ex)
+            {
+                creationError = ex;
+            }
+        });
+
+        thread.IsBackground = true;
+        thread.Start();
+        thread.Join();
+
+        if (creationError is not null)
+        {
+            throw new InvalidOperationException("Failed to create secondary SingleInstanceService.", creationError);
+        }
+
+        Assert.NotNull(created);
+        return created!;
+    }
+
+    private static void MarkAsSecondaryForTest(SingleInstanceService service)
+    {
+        var ownsMutexField = typeof(SingleInstanceService).GetField(
+            "_ownsMutex",
+            BindingFlags.Instance | BindingFlags.NonPublic);
+        Assert.NotNull(ownsMutexField);
+        ownsMutexField!.SetValue(service, false);
+        Assert.False(service.IsPrimaryInstance);
+    }
+}