fix(FlowEditor): 防止事件列表为空时设置选项

- 添加了对 eventList 的空值检查- 避免在 eventList 未定义时调用 setOptions
- 提高组件在数据加载前的稳定性

src/components/FlowEditor/nodeEditors/components/EventSelect.tsx

@@ -23,7 +23,7 @@ const EventSelect: React.FC<EventSelectProps> = ({ eventList, type, onUpdateData
   const [showModal, setShowModal] = useState(false);
 
   useEffect(() => {
-    setOptions(eventList);
+    eventList && setOptions(eventList);
   }, [eventList]);
 
   const addItem = () => {