update 公共样式、加载效果、$message、api去掉不用的接口

src/main.js

@@ -4,7 +4,7 @@ import router from './router'
 import store from './store'
 import Storage from 'vue-ls'
 
-import Vant from 'vant'
+import Vant, { Toast } from 'vant'
 import 'vant/lib/index.css'
 import 'vant/lib/index.less'
 
@@ -13,10 +13,12 @@ import LangENUS from './common/lang/en-us'
 import LangZHCN from './common/lang/zh-cn'
 import { ACCESS_TOKEN, USER_INFO } from '@/store/mutation-types'
 import './permission'
+
 Vue.config.productionTip = false
 
 Vue.use(Vant)
 Vue.use(VueI18n)
+Vue.prototype.$message = Toast
 
 const i18n = new VueI18n({
   locale: 'zh-CN',