重构项目结构：迁移到单体架构并优化代码组织

- 删除分布式架构相关文件和配置
- 将backend-distributed重命名为backend保留分布式代码作为参考
- 优化backend-single单体架构实现
- 添加Coze API集成相关文档和测试
- 清理项目根目录的部署脚本和配置文件
- 更新WebSocket和消息服务实现
- 完善认证服务和密码加密功能

backend-single/src/main/java/com/emotion/service/impl/MessageServiceImpl.java

@@ -148,17 +148,17 @@ public class MessageServiceImpl extends ServiceImpl<MessageMapper, Message> impl
     }
 
     @Override
-    public Message createMessage(String conversationId, String userId, String content, 
-                                String contentType, String senderType, String senderId) {
-        Message message = new Message();
-        message.setConversationId(conversationId);
-        message.setContent(content);
-        message.setType(contentType);
-        message.setSender(senderType);
-        message.setCreateBy(userId);
-        message.setTimestamp(LocalDateTime.now());
-        message.setStatus("sent");
-        message.setIsRead(0);
+    public Message createMessage(Message message) {
+        // 设置默认值
+        if (message.getTimestamp() == null) {
+            message.setTimestamp(LocalDateTime.now());
+        }
+        if (message.getStatus() == null) {
+            message.setStatus("sent");
+        }
+        if (message.getIsRead() == null) {
+            message.setIsRead(0);
+        }
 
         this.save(message);
         return message;