chore(device-group): 增加空提示

src/views/device-manage/group/components/GroupList.vue

@@ -2,7 +2,7 @@
 import { ref, watch } from 'vue'
 import { PlusOutlined, SyncOutlined } from '@ant-design/icons-vue'
 import { useAsyncState } from '@vueuse/core'
-import { Popconfirm, Space, Tree } from 'ant-design-vue'
+import { Empty, Popconfirm, Space, Tree } from 'ant-design-vue'
 import GroupFormModal from './GroupFormModal.vue'
 import { useModal } from '@/components/Modal'
 import { deleteDevicegroup, getDeviceGroupTree } from '@/api/device-manage/group'
@@ -90,6 +90,7 @@ const { hasPermission } = usePermission()
             </div>
           </template>
         </Tree>
+        <Empty v-if="!state.length" :image="Empty.PRESENTED_IMAGE_SIMPLE" />
       </div>
     </div>