fix

src/main/java/com/knowledge/base/infrastructure/south/minio/MinioOSGatewayImpl.java

@@ -84,7 +84,7 @@ public class MinioOSGatewayImpl implements ObjectStorageGateway {
             return String.format("http://s3.wisdompulse.cn/%s/%s", bucket, objectPath);
         } else {
             // 生成预签名链接（最大 7 天）
-            return localMinioClient.getPresignedObjectUrl(
+            return minioClient.getPresignedObjectUrl(
                     GetPresignedObjectUrlArgs.builder()
                             .method(Method.GET)
                             .bucket(bucket)