fix.启动器一定要能够启动

LanMountainDesktop/Services/Launcher/LauncherIpcClient.cs

@@ -0,0 +1,82 @@
+using System.IO.Pipes;
+using System.Text.Json;
+using LanMountainDesktop.Shared.Contracts.Launcher;
+
+namespace LanMountainDesktop.Services.Launcher;
+
+/// <summary>
+/// Launcher IPC 客户端 - 向 Launcher 报告启动进度
+/// </summary>
+public class LauncherIpcClient : IDisposable
+{
+    private NamedPipeClientStream? _pipeClient;
+    private bool _isConnected;
+    
+    /// <summary>
+    /// 连接到 Launcher 的 IPC 服务端
+    /// </summary>
+    public async Task<bool> ConnectAsync(CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            _pipeClient = new NamedPipeClientStream(
+                ".",
+                LauncherIpcConstants.PipeName,
+                PipeDirection.Out);
+            
+            await _pipeClient.ConnectAsync(5000, cancellationToken);
+            _isConnected = true;
+            return true;
+        }
+        catch (TimeoutException)
+        {
+            // Launcher 可能没有启动 IPC 服务端，这是正常的
+            return false;
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("LauncherIpc", $"Failed to connect to Launcher IPC: {ex.Message}");
+            return false;
+        }
+    }
+    
+    /// <summary>
+    /// 报告启动进度
+    /// </summary>
+    public async Task ReportProgressAsync(StartupProgressMessage message)
+    {
+        if (!_isConnected || _pipeClient?.IsConnected != true)
+            return;
+        
+        try
+        {
+            var json = JsonSerializer.Serialize(message);
+            using var writer = new StreamWriter(_pipeClient, leaveOpen: true);
+            await writer.WriteAsync(json);
+            await writer.FlushAsync();
+        }
+        catch (IOException)
+        {
+            // 管道断开
+            _isConnected = false;
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("LauncherIpc", $"Failed to report progress: {ex.Message}");
+        }
+    }
+    
+    /// <summary>
+    /// 检查是否从 Launcher 启动
+    /// </summary>
+    public static bool IsLaunchedByLauncher()
+    {
+        return !string.IsNullOrEmpty(
+            Environment.GetEnvironmentVariable(LauncherIpcConstants.LauncherPidEnvVar));
+    }
+    
+    public void Dispose()
+    {
+        _pipeClient?.Dispose();
+    }
+}