:zap: 修复租户背景读取功能

src/page/login/index.vue

@@ -1,5 +1,6 @@
 <template>
   <div class="login-container"
+       ref="login"
        @keyup.enter.native="handleLogin">
     <top-color v-show="false"></top-color>
     <div class="login-weaper animated bounceInDown">