feat: complete Nexus mission-control workflows

backend/Services/TaskService.cs

@@ -11,7 +11,8 @@ public sealed class TaskService(
     INotificationService notificationService,
     IAgentService agentService,
     IHttpContextAccessor httpContextAccessor,
-    ILiveUpdateService liveUpdateService) : ITaskService
+    ILiveUpdateService liveUpdateService,
+    IStaleTaskRecoveryService staleTaskRecoveryService) : ITaskService
 {
     public async Task<IReadOnlyList<WorkTask>> GetAllAsync(CancellationToken ct = default)
         => await taskRepo.GetAllAsync(ct);
@@ -495,30 +496,8 @@ public sealed class TaskService(
         return ResetStaleInProgressTasksAsync(TimeSpan.FromHours(normalizedHours), ct);
     }
 
-    public async Task<int> ResetStaleInProgressTasksAsync(TimeSpan staleThreshold, CancellationToken ct = default)
-    {
-        var all = await taskRepo.GetAllAsync(ct);
-        var threshold = DateTimeOffset.UtcNow - staleThreshold;
-        var staleTasks = all.Where(t => string.Equals(t.State, "In progress", StringComparison.OrdinalIgnoreCase) && t.UpdatedAt < threshold).ToList();
-
-        foreach (var task in staleTasks)
-        {
-            var prevState = task.State;
-            task.State = "Backlog";
-            await taskRepo.UpdateAsync(task, ct);
-            await activityRepo.AddAsync(new ActivityEvent
-            {
-                Type = "task",
-                Message = $"Task \"{task.Title}\" reset from {prevState} to Backlog (stale)",
-                TaskId = task.Id
-            }, ct);
-        }
-
-        if (staleTasks.Count > 0)
-            await PublishBoardSnapshotAsync(ct);
-
-        return staleTasks.Count;
-    }
+    public Task<int> ResetStaleInProgressTasksAsync(TimeSpan staleThreshold, CancellationToken ct = default)
+        => staleTaskRecoveryService.ResetStaleInProgressTasksAsync(staleThreshold, ct);
 
     public async Task<IReadOnlyList<WorkTask>> GetChildTasksAsync(Guid parentId, CancellationToken ct = default)
     {