fix : 切换站点当无隧道时提示

src/views/tunnel/index.vue

@@ -257,9 +257,14 @@ const getScreenInfo = (id) => {
 const getTunnel = (id) => {
   getTunnelBySiteId(id).then((res) => {
     if (res?.code === 1000) {
-      getScreenInfo(res.data[0]?.value)
-      tunnelName = res.data[0].label
-      tunnelList.value = res.data
+      if(res.data.length === 0){
+        ElMessage.warning('该站点下无隧道, 请新增隧道后再尝试!')
+        tunnelList.value = []
+      }else {
+        getScreenInfo(res.data[0]?.value)
+        tunnelName = res.data[0].label
+        tunnelList.value = res.data
+      }
     }
   });
 }