feat: 活动背景图可配处理

miniprogram/pages/activity/activity.less

@@ -2,7 +2,7 @@
 
 .act_root {
   background-color: #FAFFEE;
-  background-image: url("https://yun.duiba.com.cn/polaris/actBg.5a666aec020bafc3f10a1a967a564c792ccbef72.jpg");
+  // background-image: url("https://yun.duiba.com.cn/polaris/actBg.5a666aec020bafc3f10a1a967a564c792ccbef72.jpg");
   background-size: 750rpx 1624rpx;
   background-repeat: no-repeat;
 

miniprogram/pages/activity/activity.ts

@@ -9,6 +9,7 @@ ComponentWithStore({
         fields: {
             showPhoneBtn: () => !store.homeInfo.mobile,
             activityInfo: () => store.activityInfo,
+            homeInfo: () => store.homeInfo,
         },
         actions: {},
     },

miniprogram/pages/activity/activity.wxml

 <!--pages/activity/activity.wxml-->
-<view class="act_root">
+<view class="act_root" style="background-image: url({{homeInfo.bgImg}})">
     <swiper class="act_swiper" autoplay>
         <swiper-item class="act_swiper_item" wx:for="{{activityInfo.topBanners}}" wx:key="*this">
             <image class="swiper_item_img" src="{{item}}" lazy-load/>