private<fix>

1. 聊天列表默认头像使用对象存储上的图片

store/getters.js

+// require('@/assets/img/private-head.png')
 const defaultHead =
 const defaultHead =
   process.env.private === true
   process.env.private === true
-    ? require('@/assets/img/private-head.png')
+    ? `${process.env.DEF_OSS}/static/common/private-head.png`
     : require(`@/assets/img/default-head.jpg`);
     : require(`@/assets/img/default-head.jpg`);
 const phoneHead = require(`@/assets/img/phone-head.png`);
 const phoneHead = require(`@/assets/img/phone-head.png`);