fix: 后端代码格式化

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

@@ -1,15 +1,15 @@
 package com.openisle.dto;
 
-import lombok.Data;
-
 import java.util.List;
+import lombok.Data;
 
 /** DTO representing a saved draft. */
 @Data
 public class DraftDto {
-    private Long id;
-    private String title;
-    private String content;
-    private Long categoryId;
-    private List<Long> tagIds;
+
+  private Long id;
+  private String title;
+  private String content;
+  private Long categoryId;
+  private List<Long> tagIds;
 }