Cookie导出增加格式选择

- 后端: export接口增加 format 参数，支持 csv 和 custom 格式
- custom 格式: 账号----密码----ck，导出为 txt
- 后端: 导出用批量查 Account 替代逐条查询，消除 N+1
- 前端: 导出按钮改为下拉菜单可选格式
- 修复: blob 导出时不再取 .data（拦截器已提取）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

web/frontend/src/api/modules.ts

@@ -67,7 +67,7 @@ export const loginApi = {
 
 export const cookieApi = {
   list: () => api.get<any, any[]>('/cookies'),
-  exportCsv: () => api.get('/cookies/export', { responseType: 'blob' }),
+  exportCsv: (format?: string) => api.get('/cookies/export', { responseType: 'blob', params: format ? { format } : {} }),
   delete: (id: number) => api.delete<any, any>(`/cookies/${id}`),
 };
 

web/frontend/src/pages/CookiePage.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useState } from 'react';
-import { Table, Button, Card, Row, Col, Statistic, message, Tag, Popconfirm, Space, Typography, Input, theme } from 'antd';
+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 } from '../api/modules';
 import { getUser, hasPerm } from '../store/auth';
@@ -34,13 +34,13 @@ export default function CookiePage() {
     loadCookies();
   }, []);
 
-  const handleExport = async () => {
+  const handleExport = async (format: string = 'csv') => {
     try {
-      const res = await cookieApi.exportCsv();
-      const url = URL.createObjectURL(new Blob([res.data]));
+      const blob = await cookieApi.exportCsv(format);
+      const url = URL.createObjectURL(blob instanceof Blob ? blob : new Blob([blob]));
       const a = document.createElement('a');
       a.href = url;
-      a.download = 'cookies.csv';
+      a.download = format === 'custom' ? 'cookies_custom.txt' : 'cookies.csv';
       a.click();
       URL.revokeObjectURL(url);
       message.success('已导出');
@@ -170,9 +170,18 @@ export default function CookiePage() {
             复制选中 {selectedRowKeys.length > 0 && `(${selectedRowKeys.length})`}
           </Button>
           {canExport && (
-            <Button type="primary" icon={<DownloadOutlined />} onClick={handleExport}>
-              导出 CSV
-            </Button>
+            <Dropdown
+              menu={{
+                items: [
+                  { key: 'csv', label: 'CSV（账号, Cookie, 时间）', onClick: () => handleExport('csv') },
+                  { key: 'custom', label: '自定义（账号----密码----ck）', onClick: () => handleExport('custom') },
+                ],
+              }}
+            >
+              <Button type="primary" icon={<DownloadOutlined />}>
+                导出
+              </Button>
+            </Dropdown>
           )}
         </Space>
       </div>