初始化v1

src/main/java/com/nlshop/entity/Message.java

@@ -0,0 +1,21 @@
+package com.nlshop.entity;
+
+import lombok.Data;
+import java.time.LocalDateTime;
+
+@Data
+public class Message {
+    private Long id;
+    private Long userId;
+    private Long merchantId;
+    private Long orderId;
+    private String content;
+    private String reply;
+    private Integer status; // 0-未回复，1-已回复
+    private LocalDateTime createTime;
+    private LocalDateTime replyTime;
+    
+    // 关联查询字段
+    private User user;
+    private Order order;
+}