fix bug

py-client/strategy/trend/order.py

@@ -41,9 +41,9 @@ class OrderBook:
         self.mutex = Lock()
 
     @staticmethod
-    def new_order_id(leg: str) -> str:
-        """生成短订单号，为 QMT 备注中的信号键预留空间。"""
-        return f"zt-{leg[:1]}-{secrets.token_hex(4)}"
+    def new_order_id(_leg: str) -> str:
+        """生成 ``trend-xxxxxxxx`` 格式的本地订单号。"""
+        return f"trend-{secrets.token_hex(4)}"
 
     def busy(self, code: str, side: str) -> bool:
         """判断证券是否存在仍在处理中的同方向委托。"""