案例助手：增加@Transactional注解

servers/boe-server-all/src/main/java/com/xboe/module/boecase/service/impl/CaseAiChatServiceImpl.java

@@ -45,6 +45,7 @@ import org.jetbrains.annotations.Nullable;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.StringUtils;
 import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
 
@@ -83,6 +84,7 @@ public class CaseAiChatServiceImpl implements ICaseAiChatService {
     private CasesDao casesDao;
 
     @Override
+    @Transactional
     public SseEmitter chat(CaseAiChatDto caseAiChatDto, CurrentUser currentUser) {
         // 1. 获取conversationId
         String conversationId = getOrCreateConversationId(caseAiChatDto, currentUser);
@@ -96,7 +98,7 @@ public class CaseAiChatServiceImpl implements ICaseAiChatService {
             conversation.setAiConversationId(conversationId);
             conversation.setConversationName("AI案例咨询-" + LocalDateTime.now());
             conversation.setConversationUser(currentUser.getAccountId());
-            // 由于编译问题，这里先注释，实际部署时需要取消注释
+            // 保存会话到数据库
             caseAiConversationsDao.save(conversation);
         }
         
@@ -242,6 +244,7 @@ public class CaseAiChatServiceImpl implements ICaseAiChatService {
     }
 
     @Override
+    @Transactional
     public CaseAiConversations createNewConversation(String userId, String conversationName) {
         try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
             String url = caseAiProperties.getBaseUrl() + "/apigateway/knowledge/v1/conversation";