fix: 后端代码格式化

backend/src/main/java/com/openisle/dto/PostDetailDto.java

@@ -1,16 +1,15 @@
 package com.openisle.dto;
 
+import java.util.List;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 
-import java.util.List;
-
 /**
  * Detailed DTO for a post, including comments.
  */
 @Data
 @EqualsAndHashCode(callSuper = true)
 public class PostDetailDto extends PostSummaryDto {
-    private List<CommentDto> comments;
-}
 
+  private List<CommentDto> comments;
+}