fix: 修复消息通知websocket的连接问题

nladmin-ui/src/views/system/notice/NoticeIcon.vue

@@ -7,7 +7,7 @@
     <div style="margin: 5px" v-loading="loading">
       <el-tabs v-model="activeName" @tab-click="handleClick">
         <el-tab-pane :label="d.label" :name="d.value" v-for="d in dict.notice_type" :key="d.id">
-          <el-empty v-show="notReadMsgList[d.value-1].length == 0" description="暂无信息" ></el-empty>
+          <el-empty v-if="notReadMsgList && notReadMsgList[d.value-1] && notReadMsgList[d.value-1].length === 0" description="暂无信息" ></el-empty>
           <div v-for="o in notReadMsgList[d.value-1]" :key="o.notice_id">
             <a href="javascript:" @click="showMessage(o)">
               <el-row @click="showMessage">
@@ -52,6 +52,9 @@ export default {
       notReadMsgList: []
     }
   },
+  beforeMount() {
+    this.getMessage()
+  },
   methods: {
     /**
      * 打开列表页