优化路由逻辑，合并用户类型获取逻辑，简化代码结构，提升可读性和维护性。

src/router/index.js

@@ -1,6 +1,6 @@
 import { createRouter, createWebHistory } from 'vue-router'
 import { isLoggedIn } from '@/utils/auth'
-import { canAccessRoute } from '@/utils/permission'
+import { canAccessRoute, getCurrentUserType } from '@/utils/permission'
 
 const AdminLayout = () => import('@/layouts/AdminLayout.vue')
 const Login = () => import('@/views/Login.vue')
@@ -24,7 +24,6 @@ export const routes = [
         path: '', 
         redirect: (to) => {
           // 根据用户类型重定向到不同的默认页面
-          const { getCurrentUserType } = require('@/utils/permission')
           const userType = getCurrentUserType()
           
           if (userType?.toLowerCase() === 'agent') {
@@ -58,7 +57,6 @@ router.beforeEach((to, from, next) => {
   // 检查路由权限
   if (to.name && !canAccessRoute(to.name)) {
     // 根据用户类型跳转到有权限的默认页面
-    const { getCurrentUserType } = require('@/utils/permission')
     const userType = getCurrentUserType()
     
     if (userType?.toLowerCase() === 'agent') {