fix UI

layouts/admin.vue

 <template>
-  <div>
+  <v-app>
     <NavBar />
     <nuxt />
-  </div>
+  </v-app>
 </template>
 
 <script>

pages/users/index.vue

+<!-- eslint-disable vue/valid-v-slot -->
 <template>
   <v-app>
     <div>
-    <div />
       <div>
         <v-breadcrumbs :items="items">
           <template #divider>
@@ -155,6 +155,7 @@
             <v-spacer />
           </v-toolbar>
         </template>
+        // eslint-disable-next-line vue/valid-v-slot
         <template #item.actions="{ item }">
           <v-icon :id="item.id" small class="mr-2" @click="dialog2 = true; editUser(item);">
             mdi-pencil
@@ -170,7 +171,7 @@
         </template>
       </v-data-table>
     </div>
-</v-app>
+  </v-app>
 </template>
 <script>
 export default {