fix: 修复proxy_service和account_service中不当的顶层import

- proxy_service.py: 将requests和WhitelistManager改为函数内延迟import，
  避免启动时加载不需要的依赖；移除未使用的get_exit_ip_via_proxy导入
- account_service.py: 移除未使用的func、joinedload、AuditLog、
  user_has_permission顶层导入

web/frontend/src/pages/CookiePage.tsx

@@ -2,7 +2,7 @@ import { useEffect, useState } from 'react';
 import { Table, Button, Card, Row, Col, Statistic, message, Tag, Popconfirm, Space, Typography, Input, theme, Dropdown } from 'antd';
 import { DownloadOutlined, DeleteOutlined, CopyOutlined, SearchOutlined } from '@ant-design/icons';
 import { cookieApi, type CookieItem } from '../api/modules';
-import { getUser, hasPerm } from '../store/auth';
+import { usePermissions } from '../hooks/usePermissions';
 import { formatTime } from '../utils/time';
 import { getErrorMessage } from '../utils/error';
 
@@ -14,10 +14,10 @@ export default function CookiePage() {
   const [loading, setLoading] = useState(false);
   const [selectedRowKeys, setSelectedRowKeys] = useState<React.Key[]>([]);
   const [searchText, setSearchText] = useState('');
-  const user = getUser();
+  const { can } = usePermissions();
 
-  const canView = hasPerm(user, 'cookie:view');
-  const canExport = hasPerm(user, 'cookie:export');
+  const canView = can('cookie:view');
+  const canExport = can('cookie:export');
 
   const loadCookies = async () => {
     setLoading(true);