fix: 修复getUsername未导出的错误，改用uni.getStorageSync直接获取

src/pages/index/index.vue

@@ -154,7 +154,7 @@
 </template>
 
 <script>
-import { isAdmin, isSales, isCustomer, isGuest, getUsername } from '@/utils/auth'
+import { isAdmin, isSales, isCustomer, isGuest } from '@/utils/auth'
 
 export default {
   data() {
@@ -176,7 +176,7 @@ export default {
     isLoggedIn() { return !isGuest() }
   },
   onShow() {
-    this.username = getUsername() || ''
+    this.username = uni.getStorageSync('username') || '' || ''
     this.setGreeting()
   },
   methods: {