feat：报错修复，练习页面加载，

src/api/modules/system.ts

@@ -1,4 +1,4 @@
-import { request } from '../request'
+import request from '../request'
 import type { ApiResponse } from '../types'
 
 export interface SystemSettings {

src/utils/maintenanceGuard.ts

@@ -34,7 +34,7 @@ export const isAdminRoute = (path: string): boolean => {
 /**
  * 路由守卫：检查网站维护状态
  */
-export const maintenanceGuard = (to: any, from: any, next: any) => {
+export const maintenanceGuard = (to: any, _from: any, next: any) => {
   const siteEnabled = isSiteEnabled()
   const isAdmin = isAdminRoute(to.path)