飞行控制，无人机状态给个默认值

src/views/demo/workmanagement/flightoperation/src/FlightControl.vue

@@ -194,7 +194,7 @@
   import { airPortStore } from '@/store/modules/airport';
   import { EventBus } from '@/utils/eventBus';
 
-  const uavStatus = ref();
+  const uavStatus = ref(0);
   const airPortStoreVal = airPortStore();
   const uav = airPortStoreVal.getUAV;
   const isTakeOff = ref(false);