v4.4.1 版本问题汇总

# v4.4.1版本问题汇总 [【v4.4.1】修复订单商品包含固定运费商品和运费模版商品时，固定运费无法正常计算的问题](https://www.crmeb.com/thread/7929) [【v4.4.1】修复pc模版个人中心我的余额不能正常显示明细记录的问题](https://www.crmeb.com/thread/7930) [【4.4.1】修复退款报错问题](https://www.crmeb.com/thread/7961) [【4.4.1】修复diy文章无法正常添加显示的问题](https://www.crmeb.com/thread/7962) [【4.4.1】APP好友代付无法分享](https://www.crmeb.com/thread/7964) [【4.4.1】后台商品采集报错问题处理](https://www.crmeb.com/thread/8002) [【4.4.1】退款或者发货的时候，有时候会报错 Undefined index: postage_price](https://www.crmeb.com/thread/8010) [【4.4.1】拆单发货会出现订单商品没有正常拆分的问题](https://www.crmeb.com/thread/8011) [【4.4.1】渠道码无法删除](https://www.crmeb.com/thread/8015) [【4.4.1】修复秒杀分销二维码错误问题](https://www.crmeb.com/thread/8031)