feat: 实现账户批量导出功能和界面优化

- 新增批量导出功能，支持text模式导出账户数据
- 添加导出弹窗，支持文本全选和文件下载
- 移动刷新按钮到全局位置，统一刷新账户和统计数据
- 在统计卡片中将已导出状态计入可用账户
- 创建自定义确认对话框替换系统confirm弹窗
- 统一按钮尺寸，修复刷新和上传按钮大小不一致
- 添加已导出状态的中文映射和样式

🤖 Generated with [Claude Code](https://claude.ai/code)

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

components/accounts/batch-operations.tsx

@@ -3,11 +3,13 @@
 import { useState } from 'react';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
+import { Textarea } from '@/components/ui/textarea';
 import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
-import { Edit3, Trash2 } from 'lucide-react';
+import { Edit3, Trash2, Download } from 'lucide-react';
 import { Account, StatsOverview } from '@/lib/types';
 import { toast } from 'sonner';
 import { PlatformSelector, OwnerSelector, StatusSelector } from '@/components/shared';
+import { apiClient } from '@/lib/api';
 
 interface BatchOperationsProps {
   selectedCount: number;
@@ -15,10 +17,13 @@ interface BatchOperationsProps {
   stats: StatsOverview | null;
   onBatchUpdate: (payload: Partial<Pick<Account, 'status' | 'ownerId' | 'notes' | 'platform'>>, targetIds?: number[]) => Promise<void>;
   onBatchDelete: () => Promise<void>;
+  onRefresh?: () => Promise<void>;
 }
 
-export function BatchOperations({ selectedCount, selectedAccounts, stats, onBatchUpdate, onBatchDelete }: BatchOperationsProps) {
+export function BatchOperations({ selectedCount, selectedAccounts, stats, onBatchUpdate, onBatchDelete, onRefresh }: BatchOperationsProps) {
   const [updateDialog, setUpdateDialog] = useState(false);
+  const [exportDialog, setExportDialog] = useState(false);
+  const [exportData, setExportData] = useState({ count: 0, text: '' });
   const [updateData, setUpdateData] = useState({
     status: '',
     platform: '',
@@ -43,6 +48,54 @@ export function BatchOperations({ selectedCount, selectedAccounts, stats, onBatc
   const selectedStats = getSelectedStats();
 
 
+  const handleBatchExport = async () => {
+    setLoading(true);
+    try {
+      const response = await apiClient.batchExportAccounts({
+        ids: selectedAccounts.map(account => account.id),
+        mode: 'text'
+      });
+      
+      if (response.code === 0 && response.data) {
+        setExportData({
+          count: response.data.exportedCount,
+          text: response.data.data
+        });
+        setExportDialog(true);
+        toast.success(`成功导出 ${response.data.exportedCount} 个账户`);
+        
+        // 导出后刷新数据
+        if (onRefresh) {
+          await onRefresh();
+        }
+      } else {
+        toast.error(response.message || '导出失败');
+      }
+    } catch (error) {
+      console.error('Export error:', error);
+      toast.error('导出失败，请稍后重试');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleDownloadTxt = () => {
+    const blob = new Blob([exportData.text], { type: 'text/plain;charset=utf-8' });
+    const url = URL.createObjectURL(blob);
+    const link = document.createElement('a');
+    link.href = url;
+    link.download = `accounts_export_${new Date().toISOString().slice(0, 19).replace(/:/g, '-')}.txt`;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+    URL.revokeObjectURL(url);
+  };
+
+  const selectAllText = (event: React.MouseEvent<HTMLTextAreaElement>) => {
+    const target = event.target as HTMLTextAreaElement;
+    target.select();
+  };
+
   const handleBatchUpdate = async () => {
     const payload: Partial<Pick<Account, 'status' | 'ownerId' | 'notes' | 'platform'>> = {};
     if (updateData.status) payload.status = updateData.status;
@@ -116,6 +169,15 @@ export function BatchOperations({ selectedCount, selectedAccounts, stats, onBatc
           <Edit3 className="h-4 w-4 mr-1" />
           批量更新
         </Button>
+        <Button
+          variant="outline"
+          size="sm"
+          onClick={handleBatchExport}
+          disabled={loading}
+        >
+          <Download className="h-4 w-4 mr-1" />
+          导出
+        </Button>
         <Button
           variant="destructive"
           size="sm"
@@ -195,6 +257,43 @@ export function BatchOperations({ selectedCount, selectedAccounts, stats, onBatc
           </DialogFooter>
         </DialogContent>
       </Dialog>
+
+      <Dialog open={exportDialog} onOpenChange={setExportDialog}>
+        <DialogContent className="max-w-2xl">
+          <DialogHeader>
+            <DialogTitle>账户导出</DialogTitle>
+            <DialogDescription>
+              成功导出 {exportData.count} 个账户
+            </DialogDescription>
+          </DialogHeader>
+          <div className="space-y-4">
+            <div className="space-y-2">
+              <label className="text-sm font-medium">导出内容（点击文本框全选）:</label>
+              <Textarea
+                value={exportData.text}
+                readOnly
+                onClick={selectAllText}
+                className="min-h-[300px] font-mono text-sm"
+                placeholder="导出的账户数据将显示在这里..."
+              />
+            </div>
+          </div>
+          <DialogFooter>
+            <Button 
+              variant="outline" 
+              onClick={() => setExportDialog(false)}
+            >
+              关闭
+            </Button>
+            <Button 
+              onClick={handleDownloadTxt}
+            >
+              <Download className="h-4 w-4 mr-1" />
+              下载 .txt 文件
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
     </>
   );
 }