NEZ-3220 fix：当角色只存在 Dashboard.view 权限时，无法看到 dashboard 列表

nezha-fronted/src/components/page/dashboard/dashboard.vue

@@ -11,8 +11,7 @@
           <div v-if="panelData.length === 0" class="top-tool-left" style="margin-left: 10px;">
             <button id="dashboard-add-panel" class="nz-btn nz-btn-style-light nz-btn-size-small" v-has="'main_add'" @click="toAdd"><i class="nz-icon nz-icon-create-square"></i>&nbsp;&nbsp;{{$t("overall.addDashboard")}}</button>
           </div>
-          <template v-if="panelData.length">
-            <div class="top-tool-left" style="cursor: pointer;">
+          <div  v-if="panelData.length" class="top-tool-left" style="cursor: pointer;">
             <select-dashboard
               ref="selectDashboard"
               :panel-data="panelData"
@@ -47,7 +46,7 @@
             </select-dashboard>
           </div>
 
-            <div class="top-tool-right">
+          <div v-if="panelData.length" class="top-tool-right">
             <!-- 仪表盘轮播 -->
             <playlist v-if="playListControls" :playlistObj="playlistObj" :panelData="panelData" @stopPlaylist="stopPlaylist" @changePlay="panelChange"></playlist>
 
@@ -95,7 +94,6 @@
               </top-tool-more-options>
             </template>
           </div>
-          </template>
         </div>
         <div id="tableList" class="table-list" style='overflow-y: unset'>
           <div class="table-list-box">