fix: 解决打包时提示 MqttClient is not exported 类型问题；

src/layout/index.vue

@@ -78,7 +78,7 @@ import userDropdown from './components/userDropdown/index.vue'
 import { useRoute, useRouter } from 'vue-router'
 import timeNow from './components/timeNow/index.vue'
 import type { Route } from 'ant-design-vue/es/breadcrumb/Breadcrumb'
-import mqtt, { MqttClient } from 'mqtt'
+import mqtt, { type MqttClient } from 'mqtt'
 import { useUserStore } from '@/stores/user'
 import AlertModal from './components/alertModal/index.vue'
 import { ArrowLeftOutlined, SyncOutlined } from '@ant-design/icons-vue'

src/views/device/detail/index.vue

@@ -344,7 +344,7 @@ import { useRoute } from 'vue-router'
 import { message } from 'ant-design-vue'
 import * as roomApi from '@/api/room'
 import type { Furniture } from '@/api/room/types'
-import mqtt, { MqttClient } from 'mqtt'
+import mqtt, { type MqttClient } from 'mqtt'
 import * as deviceApi from '@/api/device'
 import type { DeviceDetailData } from '@/api/device/types'
 import { deviceOnlineStateMap } from '@/const/device'