feat: implement launcher orchestrator and startup monitoring infrastructure for host lifecycle management

LanMountainDesktop.Launcher/Startup/HostLaunchService.cs

@@ -208,13 +208,15 @@ internal sealed class HostLaunchService
 
     private static async Task EnsureAirAppRuntimeStartedAsync(string appRoot, string? dataRoot)
     {
+        Logger.Info("HOST LAUNCH: Attempting to pre-start AirApp Runtime...");
         try
         {
             await new AirAppRuntimeBridge(appRoot, dataRoot).EnsureStartedAsync().ConfigureAwait(false);
+            Logger.Info("HOST LAUNCH: AirApp Runtime pre-start completed.");
         }
         catch (Exception ex)
         {
-            Logger.Warn($"AirApp Runtime pre-start failed; Host fallback remains available. Error='{ex.Message}'.");
+            Logger.Warn($"HOST LAUNCH: AirApp Runtime pre-start failed; Host fallback remains available. Error='{ex.Message}'");
         }
     }
 
@@ -249,6 +251,11 @@ internal sealed class HostLaunchService
 
         try
         {
+            Logger.Info($"ATTEMPTING HOST START: Path='{plan.HostPath}'; WorkingDir='{plan.WorkingDirectory}'; Mode='{startMode}'");
+            Logger.Info($"  Arguments: {HostLaunchPlanBuilder.FormatArgumentsForLog(plan.Arguments)}");
+            Logger.Info($"  File exists: {File.Exists(plan.HostPath)}");
+            Logger.Info($"  Working dir exists: {Directory.Exists(plan.WorkingDirectory)}");
+
             var process = Process.Start(startInfo);
             Logger.Info(
                 $"Host launch requested. Mode='{startMode}'; RetryTag='{retryTag ?? "<none>"}'; Path='{plan.HostPath}'; " +
@@ -257,15 +264,30 @@ internal sealed class HostLaunchService
 
             if (process is null)
             {
+                Logger.Error($"CRITICAL: Process.Start returned null! Path='{plan.HostPath}'; Mode='{startMode}'");
+                Console.Error.WriteLine($"[CRITICAL] Process.Start returned null for path: {plan.HostPath}");
                 return HostStartAttempt.StartFailed(startMode, "process_start_returned_null", plan);
             }
 
-            await Task.Yield();
+            // 等待一小段时间，检查进程是否立即退出
+            await Task.Delay(500).ConfigureAwait(false);
+
+            if (process.HasExited)
+            {
+                Logger.Error($"CRITICAL: Host process exited immediately! ExitCode={process.ExitCode}; Path='{plan.HostPath}'");
+                Console.Error.WriteLine($"[CRITICAL] Host process exited immediately with code {process.ExitCode}");
+                return HostStartAttempt.StartFailed(startMode, $"process_exited_immediately_code_{process.ExitCode}", plan);
+            }
+
+            Logger.Info($"Host process started successfully and is running. PID={process.Id}");
             return HostStartAttempt.Started(startMode, process, plan);
         }
         catch (Exception ex)
         {
-            Logger.Error($"Host start failed. Mode='{startMode}'.", ex);
+            Logger.Error($"CRITICAL: Host start exception! Path='{plan.HostPath}'; Mode='{startMode}'; Exception={ex.GetType().Name}; Message='{ex.Message}'", ex);
+            Console.Error.WriteLine($"[CRITICAL] Host start failed: {ex.Message}");
+            Console.Error.WriteLine($"[CRITICAL] Path: {plan.HostPath}");
+            Console.Error.WriteLine($"[CRITICAL] Exception: {ex}");
             return HostStartAttempt.StartFailed(startMode, ex.GetType().Name, plan);
         }
     }

LanMountainDesktop.Launcher/Startup/HostStartupMonitor.cs

@@ -86,7 +86,7 @@ internal sealed class HostStartupMonitor
             ]).ConfigureAwait(false);
         if (!connected)
         {
-            Logger.Info("Host public IPC is not ready yet. Launcher will keep monitoring the host process and retry.");
+            Logger.Info("Host public IPC is not ready yet after initial connection attempts. Launcher will keep monitoring the host process and retry periodically.");
         }
         else
         {
@@ -106,6 +106,8 @@ internal sealed class HostStartupMonitor
         var nextShellStatusPollAt = DateTimeOffset.UtcNow + StartupTimeoutPolicy.ShellStatusPollInterval;
         var ipcReconnectAttemptIndex = 0;
         var activationRetryAttempted = false;
+        var lastIpcConnectionFailureReported = DateTimeOffset.MinValue;
+        var ipcConnectionFailureCount = 0;
 
         while (true)
         {
@@ -224,6 +226,7 @@ internal sealed class HostStartupMonitor
                 if (connected)
                 {
                     ipcConnected = true;
+                    Logger.Info($"Host public IPC reconnected successfully after {ipcConnectionFailureCount} failed attempts.");
                     var shellSuccess = await RefreshShellStatusAsync("Host public IPC reconnected; waiting for desktop shell.")
                         .ConfigureAwait(false);
                     if (shellSuccess is not null)
@@ -232,6 +235,18 @@ internal sealed class HostStartupMonitor
                         continue;
                     }
                 }
+                else
+                {
+                    ipcConnectionFailureCount++;
+                    // 每 30 秒报告一次 IPC 连接失败
+                    if ((now - lastIpcConnectionFailureReported).TotalSeconds >= 30)
+                    {
+                        lastIpcConnectionFailureReported = now;
+                        var elapsed = (now - startedAt).TotalSeconds;
+                        Logger.Warn($"Host public IPC connection still unavailable after {elapsed:0}s and {ipcConnectionFailureCount} reconnect attempts. Host process is alive (PID={request.HostProcess.Id}).");
+                        request.Reporter.Report("diagnostic", $"正在等待主应用响应... (已尝试 {ipcConnectionFailureCount} 次)");
+                    }
+                }
 
                 nextReconnectAttemptAt = DateTimeOffset.UtcNow + StartupTimeoutPolicy.IpcReconnectInterval;
             }
@@ -263,6 +278,16 @@ internal sealed class HostStartupMonitor
                 nextCheckpointAt = softTimeoutAt;
             }
 
+            if (!ipcConnected && nextReconnectAttemptAt < nextCheckpointAt)
+            {
+                nextCheckpointAt = nextReconnectAttemptAt;
+            }
+
+            if (ipcConnected && nextShellStatusPollAt < nextCheckpointAt)
+            {
+                nextCheckpointAt = nextShellStatusPollAt;
+            }
+
             var delay = nextCheckpointAt - now;
             if (delay > TimeSpan.FromSeconds(1))
             {
@@ -351,11 +376,11 @@ internal sealed class HostStartupMonitor
         if (!connected && !request.HostProcess.HasExited)
         {
             request.AttemptRegistry.MarkOwnedWaitingForShell("Host process is still running, but public IPC is not ready yet.");
-            request.PublishCoordinatorStatus(true, false, true);
+            request.PublishCoordinatorStatus(true, true, false);
             return new Outcome(
-                true,
-                "startup_pending",
-                "Host process is still running; Launcher will not start another process while public IPC finishes startup.",
+                false,
+                "ipc_connection_failed",
+                $"Host process is still running after {StartupTimeoutPolicy.HardTimeout.TotalSeconds:0} seconds, but public IPC connection could not be established. This may indicate the host is stuck during initialization.",
                 recoveryActivationAttempted,
                 request.ComposeLaunchDetails(true, recoveryActivationAttempted));
         }

LanMountainDesktop.Launcher/Startup/StartupAttemptRegistry.cs

@@ -89,6 +89,14 @@ internal sealed class StartupAttemptRegistry
         ExecuteWithLock(() =>
         {
             var existing = LoadUnsafe();
+
+            // 清理过期的记录
+            if (existing is not null && IsStaleAttempt(existing))
+            {
+                Logger.Info($"Cleaning up stale startup attempt record. AttemptId='{existing.AttemptId}'; State='{existing.State}'; Age={(DateTimeOffset.UtcNow - existing.UpdatedAtUtc).TotalMinutes:0.1}min.");
+                existing = null;
+            }
+
             if (existing is not null && IsCoordinatorLive(existing))
             {
                 active = Clone(existing);
@@ -145,6 +153,34 @@ internal sealed class StartupAttemptRegistry
         return reserved is not null;
     }
 
+    private static bool IsStaleAttempt(StartupAttemptRecord record)
+    {
+        // 记录超过 10 分钟且状态为终结或非活跃状态
+        if (DateTimeOffset.UtcNow - record.UpdatedAtUtc > TimeSpan.FromMinutes(10))
+        {
+            return true;
+        }
+
+        // 进程已死且协调器心跳超时
+        if (record.CoordinatorPid > 0 &&
+            !TryGetLiveProcess(record.CoordinatorPid, out _) &&
+            DateTimeOffset.UtcNow - record.HeartbeatAtUtc > TimeSpan.FromMinutes(2))
+        {
+            return true;
+        }
+
+        // 主进程已死且协调器已死
+        if (record.HostPid > 0 &&
+            !TryGetLiveProcess(record.HostPid, out _) &&
+            record.CoordinatorPid > 0 &&
+            !TryGetLiveProcess(record.CoordinatorPid, out _))
+        {
+            return true;
+        }
+
+        return false;
+    }
+
     public StartupAttemptRecord? GetOwnedAttempt()
     {
         StartupAttemptRecord? result = null;

LanMountainDesktop.Launcher/Startup/StartupTimeoutPolicy.cs

@@ -2,22 +2,26 @@ namespace LanMountainDesktop.Launcher.Startup;
 
 internal static class StartupTimeoutPolicy
 {
-    public static readonly TimeSpan SoftTimeout = TimeSpan.FromSeconds(30);
-    public static readonly TimeSpan HardTimeout = TimeSpan.FromSeconds(120);
+    public static readonly TimeSpan SoftTimeout = TimeSpan.FromSeconds(45);
+    public static readonly TimeSpan HardTimeout = TimeSpan.FromSeconds(180);
 
-    /// <summary>Initial Public IPC connect attempt (AOT cold start may be slower).</summary>
-    public static readonly TimeSpan InitialIpcConnectTimeout = TimeSpan.FromMilliseconds(1200);
+    /// <summary>Initial Public IPC connect attempt (AOT cold start is significantly slower).</summary>
+    public static readonly TimeSpan InitialIpcConnectTimeout = TimeSpan.FromMilliseconds(3000);
 
     /// <summary>Subsequent reconnect attempts use increasing per-try timeouts.</summary>
     public static readonly TimeSpan[] IpcReconnectAttemptTimeouts =
     [
-        TimeSpan.FromMilliseconds(800),
         TimeSpan.FromMilliseconds(1500),
         TimeSpan.FromMilliseconds(3000),
-        TimeSpan.FromMilliseconds(5000)
+        TimeSpan.FromMilliseconds(5000),
+        TimeSpan.FromMilliseconds(8000),
+        TimeSpan.FromMilliseconds(10000)
     ];
 
-    public static readonly TimeSpan ExistingHostProbeTimeout = TimeSpan.FromMilliseconds(900);
+    public static readonly TimeSpan ExistingHostProbeTimeout = TimeSpan.FromMilliseconds(1500);
     public static readonly TimeSpan ShellStatusPollInterval = TimeSpan.FromSeconds(1);
-    public static readonly TimeSpan IpcReconnectInterval = TimeSpan.FromSeconds(2);
+    public static readonly TimeSpan IpcReconnectInterval = TimeSpan.FromSeconds(3);
+
+    /// <summary>Maximum time to wait for host process exit after it starts (for early-exit detection).</summary>
+    public static readonly TimeSpan HostEarlyExitWindow = TimeSpan.FromSeconds(5);
 }