perf(views): 修复“环境监控”二级分组切换画布内容异常问题

src/views/env-monitor/EnvMonitor.vue

@@ -359,6 +359,8 @@ const getRegionsPointsList = (value: number, show: boolean) => {
         });
         monitoringId.value = monitoringPointData.value[0].id;
         selectId.value = monitoringPointData.value[0].regionId;
+      } else {
+        selectId.value = data[0].id;
       }
     }
   });