优化移动端界面，新增退单管理功能，添加相关API接口，更新权限设置，调整布局以支持响应式设计，提升用户体验。

src/main.js

@@ -4,9 +4,16 @@ import 'element-plus/dist/index.css'
 import router from '@/router'
 import App from './App.vue'
 import { setupPermissionDirective } from './directives/permission'
+import mobilePlugin from './plugins/mobile'
 
 const app = createApp(App)
 app.use(ElementPlus)
 app.use(router)
+app.use(mobilePlugin, {
+  preventZoom: true,
+  handleKeyboard: true,
+  networkMonitor: true,
+  touchFeedback: true
+})
 setupPermissionDirective(app)
 app.mount('#app')