fix: null

src/main/java/cn/com/poc/expose/aggregate/impl/AgentApplicationServiceImpl.java

@@ -264,11 +264,14 @@ public class AgentApplicationServiceImpl implements AgentApplicationService {
         }
 
         //判断最后是否为User，若是则删除。
+        if (CollectionUtils.isNotEmpty(messages)) {
             if (LLMRoleEnum.USER.getRole().equals(messages.get(messages.size() - 1).getRole())) {
                 Long recordId = recordEntities.get(recordEntities.size() - 1).getId();
                 bizAgentApplicationDialoguesRecordService.deletedById(recordId);
                 messages.remove(messages.size() - 1);
             }
+        }
+
 
         // 用户输入
         Message message = new Message();