feat(ai): 添加 Dify聊天功能支持

yudao-module-ai/yudao-module-ai-biz/src/main/java/cn/iocoder/yudao/module/ai/dal/mysql/chat/AiChatConversationMapper.java

@@ -18,7 +18,10 @@ import java.util.List;
 public interface AiChatConversationMapper extends BaseMapperX<AiChatConversationDO> {
 
     default List<AiChatConversationDO> selectListByUserId(Long userId) {
-        return selectList(AiChatConversationDO::getUserId, userId);
+        return selectList(new LambdaQueryWrapperX<AiChatConversationDO>()
+                .eq(AiChatConversationDO::getUserId, userId)
+                .notIn(AiChatConversationDO::getTitle, "新对话")
+                .orderByDesc(AiChatConversationDO::getUpdateTime));
     }
 
     default List<AiChatConversationDO> selectListByUserIdAndPinned(Long userId, boolean pinned) {