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/WebSocketService.java

@@ -3,6 +3,7 @@ package com.emotion.service;
 import com.emotion.dto.websocket.ChatRequest;
 import com.emotion.dto.websocket.ConnectRequest;
 import com.emotion.dto.websocket.WebSocketMessage;
+import com.emotion.entity.Message;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.messaging.simp.SimpMessagingTemplate;
@@ -219,14 +220,13 @@ public class WebSocketService {
         new Thread(() -> {
             try {
                 // 保存用户消息到数据库
-                messageService.createMessage(
-                    request.getConversationId(),
-                        request.getSenderId(),
-                            request.getContent(),
-                    request.getMessageType().name(),
-                        request.getSenderType().name(),
-                        request.getSenderId()
-                );
+                Message userMessage = new Message();
+                userMessage.setConversationId(request.getConversationId());
+                userMessage.setCreateBy(request.getSenderId());
+                userMessage.setContent(request.getContent());
+                userMessage.setType(request.getMessageType().name());
+                userMessage.setSender(request.getSenderType().name());
+                messageService.createMessage(userMessage);
 
                 // 调用AI服务
                 String aiReply = aiChatService.sendChatMessage(
@@ -248,14 +248,13 @@ public class WebSocketService {
                         .build();
                 
                 // 保存AI回复到数据库
-                messageService.createMessage(
-                    request.getConversationId(),
-                        "ai",
-                            aiReply,
-                    "text",
-                        "ai",
-                        "ai"
-                );
+                Message aiDbMessage = new Message();
+                aiDbMessage.setConversationId(request.getConversationId());
+                aiDbMessage.setCreateBy("ai");
+                aiDbMessage.setContent(aiReply);
+                aiDbMessage.setType("text");
+                aiDbMessage.setSender("ai");
+                messageService.createMessage(aiDbMessage);
 
                 // 发送AI回复
                 messagingTemplate.convertAndSendToUser(request.getSenderId(), "/queue/messages", aiMessage);