对话逻辑修复

backend-single/src/main/java/com/emotion/controller/WebSocketController.java

@@ -1,12 +1,11 @@
 package com.emotion.controller;
 
-import com.emotion.service.AIChatService;
+import com.emotion.service.AiChatService;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.messaging.handler.annotation.MessageMapping;
 import org.springframework.messaging.handler.annotation.Payload;
-import org.springframework.messaging.handler.annotation.SendTo;
 import org.springframework.messaging.simp.SimpMessageHeaderAccessor;
 import org.springframework.messaging.simp.SimpMessagingTemplate;
 import org.springframework.stereotype.Controller;
@@ -31,7 +30,7 @@ public class WebSocketController {
     private SimpMessagingTemplate messagingTemplate;
 
     @Autowired
-    private AIChatService aiChatService;
+    private AiChatService aiChatService;
 
     // 已移除旧的WebSocket消息处理方法，使用新的ChatWebSocketController