fix: 修正下载协议功能，正确处理PDF文件流

tony.cheng

2026-03-04 9167ea7dca015c7ff1f35fa7eb63161fe10eac7b

 web-app/src/components/dashboard/TabContainer.jsx

@@ -1090,13 +1090,20 @@
                            <Image.PreviewGroup>
                              <div style={{ display: 'flex', gap: 12, flexWrap: 'wrap' }}>
                                {evidenceImages.map((img, index) => {
                                  // 判断 show_url 是否以 http 开头
                                  const isFullUrl = img.show_url && img.show_url.startsWith('http');
                                  // 如果是完整URL直接使用，否则拼接 platformUrl
                                  const imgUrl = img.show_url 
                                    ? (platformUrl ? `${platformUrl}/${img.show_url}` : img.show_url)
                                    ? (isFullUrl ? img.show_url : (platformUrl ? `${platformUrl}/${img.show_url}` : img.show_url))
                                    : '';
                                  // 获取文件名：true_name 为空时取 file_name
                                  const fileName = img.true_name || img.file_name || `材料${index + 1}`;
                                  const rawFileName = img.true_name || img.file_name || `材料${index + 1}`;
                                  // 获取文件类型后缀
                                  const suffix = img.suffix || '';
                                  // 检查文件名是否已包含后缀，避免重复
                                  const fileName = suffix && rawFileName.toLowerCase().endsWith(`.${suffix.toLowerCase()}`) 
                                    ? rawFileName 
                                    : (suffix ? `${rawFileName}.${suffix}` : rawFileName);
                                  const isPdf = suffix.toLowerCase() === 'pdf';
                                  
                                  if (isPdf) {
@@ -1125,7 +1132,7 @@
                                      >
                                        <i className="fas fa-file-pdf" style={{ fontSize: 32, color: '#ff4d4f' }} />
                                        <span style={{ fontSize: 10, color: '#666', marginTop: 4, maxWidth: 90, overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
                                          {fileName}.{suffix}
                                          {fileName}
                                        </span>
                                      </div>
                                    );
@@ -1387,7 +1394,28 @@
    if (!caseId) return;
    setActionLoading(prev => ({ ...prev, download: true }));
    try {
      await MediationAgreementAPIService.downloadAgreement(caseId);
      // 调用API获取PDF文件流
      const response = await MediationAgreementAPIService.downloadAgreement(caseId);
      
      // 创建Blob对象（PDF格式）
      const blob = new Blob([response.data], { 
        type: 'application/pdf' 
      });
      
      // 创建下载链接
      const url = window.URL.createObjectURL(blob);
      const link = document.createElement('a');
      link.href = url;
      link.download = `调解协议_${caseId}.pdf`;
      
      // 触发下载
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link);
      
      // 清理URL对象
      window.URL.revokeObjectURL(url);
      
      message.success('协议下载成功！');
    } catch (err) {
      console.error('下载协议失败:', err);