7.新增客服

https://line-1258725613.cos.accelerate.myqcloud.com/video/zg/%E5%AE%A2%E6%9C%8D%E8%B4%A6%E5%8F%B7%E5%BB%BA%E7%AB%8B%E7%99%BB%E5%BD%95%E4%BD%BF%E7%94%A8.mp4line-1258725613.cos.accelerate.myqcloud.com

客服账号新建、分配、登录、聊天、备注好友