{"code":200,"msg":"欢迎使用作业识别系统 API","data":{"version":"1.0.0","endpoints":{"POST \/api\/homework\/upload":"上传作业图片并识别","GET \/api\/homework\/pdf\/:filename":"下载PDF文件","POST \/api\/grade\/upload":"上传作业图片并判分","POST \/api\/grade":"直接判分（不上传图片）","GET \/api\/grade\/result\/:id":"获取判分结果","GET \/api\/test":"测试接口","GET \/api\/test\/services":"测试Service类加载","GET \/api\/test\/config":"测试配置读取"}}}