bug修复

src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java

@@ -147,7 +147,7 @@ public class AdminSearchExamRecordDomainServiceImpl implements AdminSearchExamRe
 
     private ExamRecordPictureDTO buildPictureDTO(ExamRecordPictureEntity entity) {
         ExamRecordPictureDTO dto = entity.toDTO(ExamRecordPictureDTO::new);
-        dto.setPreviewUrl(minIoUtils.getPreviewUrl(entity.getFilePath()));
+        dto.setPreviewUrl(minIoUtils.getPublicUrl(entity.getFilePath()));
         return dto;
     }
 }