fix: 后端代码格式化

backend/src/main/java/com/openisle/model/Message.java

@@ -2,40 +2,40 @@ package com.openisle.model;
 
 import com.fasterxml.jackson.annotation.JsonBackReference;
 import jakarta.persistence.*;
+import java.time.LocalDateTime;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
 import org.hibernate.annotations.CreationTimestamp;
 
-import java.time.LocalDateTime;
-
 @Entity
 @Getter
 @Setter
 @NoArgsConstructor
 @Table(name = "messages")
 public class Message {
-    @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private Long id;
 
-    @ManyToOne(optional = false, fetch = FetchType.LAZY)
-    @JoinColumn(name = "conversation_id")
-    @JsonBackReference
-    private MessageConversation conversation;
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
 
-    @ManyToOne(optional = false, fetch = FetchType.LAZY)
-    @JoinColumn(name = "sender_id")
-    private User sender;
+  @ManyToOne(optional = false, fetch = FetchType.LAZY)
+  @JoinColumn(name = "conversation_id")
+  @JsonBackReference
+  private MessageConversation conversation;
 
-    @Column(nullable = false, columnDefinition = "TEXT")
-    private String content;
+  @ManyToOne(optional = false, fetch = FetchType.LAZY)
+  @JoinColumn(name = "sender_id")
+  private User sender;
 
-    @ManyToOne(fetch = FetchType.LAZY)
-    @JoinColumn(name = "reply_to_id")
-    private Message replyTo;
+  @Column(nullable = false, columnDefinition = "TEXT")
+  private String content;
 
-    @CreationTimestamp
-    @Column(nullable = false, updatable = false)
-    private LocalDateTime createdAt;
-}
+  @ManyToOne(fetch = FetchType.LAZY)
+  @JoinColumn(name = "reply_to_id")
+  private Message replyTo;
+
+  @CreationTimestamp
+  @Column(nullable = false, updatable = false)
+  private LocalDateTime createdAt;
+}