feat: 附件管理拆为独立tab + 员工端附件上传

管理端：
- 花名册详情新增「附件资料」独立tab（人事信息分组下）
- 从 BasicInfo 移除附件管理代码到独立 AttachmentsTab 组件
- shared.ts 添加 attachments tab 类型和计数映射

员工端：
- 后端新增 GET/POST/DELETE /portal/attachments 接口
- 前端 api-services 添加 portalDelete + 附件 API 方法
- MyProfile 新增附件资料卡片，支持上传/查看/删除附件
- 附件类型：身份证/银行卡/学历证书/职业资格证书/合同/照片/其他

frontend/src/pages/roster/BasicInfo.tsx

@@ -563,52 +563,6 @@ export default function BasicInfo({ profile, employeeId, attachments }: { profil
         </div>
       )}
 
-      {/* 附件管理 */}
-      <div className="mt-4 pt-4 border-t">
-        <div className="flex items-center justify-between mb-3">
-          <h3 className="text-xs font-medium text-gray-600">附件管理（{attachments?.length || 0}个）</h3>
-          {!editing && (
-            <div className="flex gap-2 items-center">
-              <Select value={fileType} onChange={(e) => setFileType(e.target.value as any)} className="text-xs !w-28">
-                <option value="ID_CARD">身份证</option><option value="BANK_CARD">银行卡</option><option value="EDUCATION">学历证书</option><option value="CERTIFICATE">职业资格证书</option><option value="CONTRACT">合同扫描件</option><option value="PHOTO">员工照片</option><option value="OTHER">其他</option>
-              </Select>
-              <input ref={fileInputRef} type="file" className="hidden" onChange={handleFileUpload} />
-              <Button size="sm" variant="secondary" onClick={() => fileInputRef.current?.click()} disabled={addAttachmentMutation.isPending} className="shrink-0 whitespace-nowrap">
-                {addAttachmentMutation.isPending ? '上传中...' : '上传附件'}
-              </Button>
-            </div>
-          )}
-        </div>
-        {!editing && attachments?.length ? (
-          <div className="space-y-1.5">
-            {attachments.map((att) => (
-              <div key={att.id} className="flex items-center justify-between bg-gray-50 rounded p-2 text-xs hover:bg-gray-100">
-                <div className="flex items-center gap-2 min-w-0">
-                  <Paperclip className="w-3.5 h-3.5 text-gray-400 shrink-0" />
-                  <div className="min-w-0">
-                    <div className="truncate font-medium text-gray-700">{att.fileName}</div>
-                    <div className="flex items-center gap-2 mt-0.5">
-                      <span className={`px-1.5 py-0.5 rounded text-xs ${fileTypeColors[att.fileType] || 'bg-gray-100 text-gray-500'}`}>{fileTypeLabels[att.fileType] || att.fileType}</span>
-                      <span className="text-gray-400">{formatSize(att.fileSize)}</span>
-                    </div>
-                  </div>
-                </div>
-                <div className="flex items-center gap-1.5 shrink-0 ml-2">
-                  <button onClick={() => window.open(att.fileUrl, '_blank')} className="text-gray-400 hover:text-blue-600" title="查看">
-                    <Eye className="w-3.5 h-3.5" />
-                  </button>
-                  <a href={att.fileUrl} download={att.fileName} className="text-gray-400 hover:text-blue-600" title="下载">
-                    <Download className="w-3.5 h-3.5" />
-                  </a>
-                  <button onClick={() => deleteAttachmentMutation.mutate(att.id)} className="text-gray-300 hover:text-danger" title="删除">
-                    <Trash2 className="w-3.5 h-3.5" />
-                  </button>
-                </div>
-              </div>
-            ))}
-          </div>
-        ) : !editing ? <div className="text-gray-400 text-xs text-center py-3">暂无附件</div> : null}
-      </div>
     </Card>
   )
 }