fix(delegate-task): pause timeouts for active sessions

src/features/background-agent/task-poller.ts

@@ -31,6 +31,7 @@ export function pruneStaleTasksAndNotifications(args: {
   notifications: Map<string, BackgroundTask[]>
   onTaskPruned: (taskId: string, task: BackgroundTask, errorMessage: string) => void
   taskTtlMs?: number
+  sessionStatuses?: SessionStatusMap
 }): void {
   const { tasks, notifications, onTaskPruned } = args
   const effectiveTtl = args.taskTtlMs ?? TASK_TTL_MS
@@ -62,6 +63,11 @@ export function pruneStaleTasksAndNotifications(args: {
       continue
     }
 
+    const sessionStatus = task.sessionId ? args.sessionStatuses?.[task.sessionId]?.type : undefined
+    if (task.status === "running" && sessionStatus !== undefined && isActiveSessionStatus(sessionStatus)) {
+      continue
+    }
+
     const lastActivity = task.status === "running" && task.progress?.lastUpdate
       ? task.progress.lastUpdate.getTime()
       : undefined