新增任务，手动触发定时任务更新

backend/task_scheduler/app/main.py

@@ -44,6 +44,9 @@ _registered_tasks: dict = {}  # task_id -> cron_expression
 SIGNIN_LOG_RETAIN_DAYS = int(os.getenv("SIGNIN_LOG_RETAIN_DAYS", "30"))
 CLEANUP_BATCH_SIZE = 1000
 
+# Redis 订阅线程是否运行
+_redis_listener_running = False
+
 WEIBO_HEADERS = {
     "User-Agent": (
         "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
@@ -384,10 +387,49 @@ async def _async_cleanup():
     return {"deleted": total_deleted, "cutoff": cutoff.isoformat()}
 
 
+# =============== Redis 订阅（实时同步任务变更） ===============
+
+def _start_redis_listener():
+    """启动 Redis pub/sub 监听线程，收到 task_updates 消息后立即同步。"""
+    global _redis_listener_running
+    if not shared_settings.USE_REDIS or not shared_settings.REDIS_URL:
+        logger.info("⚠️ Redis 未启用，任务变更仅靠 5 分钟轮询同步")
+        return
+
+    import threading
+    import redis
+
+    def _listen():
+        global _redis_listener_running
+        _redis_listener_running = True
+        logger.info("📡 Redis 订阅线程启动，监听 task_updates 频道")
+        while _redis_listener_running:
+            try:
+                r = redis.from_url(shared_settings.REDIS_URL, decode_responses=True)
+                pubsub = r.pubsub()
+                pubsub.subscribe("task_updates")
+                for message in pubsub.listen():
+                    if not _redis_listener_running:
+                        break
+                    if message["type"] == "message":
+                        logger.info(f"📡 收到任务变更通知: {message['data'][:200]}")
+                        sync_db_tasks()
+                pubsub.close()
+                r.close()
+            except Exception as e:
+                logger.warning(f"Redis 订阅异常，5 秒后重连: {e}")
+                _time.sleep(5)
+
+    t = threading.Thread(target=_listen, daemon=True, name="redis-listener")
+    t.start()
+
+
 # =============== 启动入口 ===============
 
 def _shutdown(signum, frame):
+    global _redis_listener_running
     logger.info(f"收到信号 {signum}，正在关闭调度器...")
+    _redis_listener_running = False
     scheduler.shutdown(wait=False)
     sys.exit(0)
 
@@ -407,6 +449,9 @@ if __name__ == "__main__":
     # 首次同步 DB 任务
     sync_db_tasks()
 
+    # 启动 Redis 订阅，实时接收任务变更通知
+    _start_redis_listener()
+
     # 每 5 分钟重新同步 DB（处理新增/删除/修改的任务）
     scheduler.add_job(
         sync_db_tasks,