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/utils/permission.js

@@ -43,6 +43,11 @@ export const PERMISSIONS = {
   ANNOUNCEMENT_UPDATE: 'announcement:update',
   ANNOUNCEMENT_DELETE: 'announcement:delete',
   ANNOUNCEMENT_VIEW: 'announcement:view',
+  
+  // 退单管理权限
+  REFUND_MANAGE: 'refund:manage',
+  REFUND_EXECUTE: 'refund:execute',
+  REFUND_VIEW: 'refund:view',
 }
 
 // 角色权限映射
@@ -67,12 +72,17 @@ export const ROLE_PERMISSIONS = {
     PERMISSIONS.ANNOUNCEMENT_UPDATE,
     PERMISSIONS.ANNOUNCEMENT_DELETE,
     PERMISSIONS.ANNOUNCEMENT_VIEW,
+    PERMISSIONS.REFUND_MANAGE,
+    PERMISSIONS.REFUND_EXECUTE,
+    PERMISSIONS.REFUND_VIEW,
   ],
   AGENT: [
     // 代理商只有查看权限，没有管理权限
     PERMISSIONS.LINK_VIEW,
     PERMISSIONS.QR_VIEW,
     PERMISSIONS.ANNOUNCEMENT_VIEW,
+    PERMISSIONS.REFUND_VIEW,
+    PERMISSIONS.REFUND_EXECUTE, // 代理可以执行退单操作
   ]
 }
 
@@ -81,6 +91,7 @@ export const ROUTE_PERMISSIONS = {
   'Users': [PERMISSIONS.USER_VIEW],
   'Settings': [PERMISSIONS.SETTING_MANAGE],
   'Links': [PERMISSIONS.LINK_VIEW],
+  'Refund': [PERMISSIONS.REFUND_VIEW],
   'Announcements': [PERMISSIONS.ANNOUNCEMENT_VIEW],
 }