岗位推荐固定位置插入改为随机插入

pages/msglog/unread.vue

@@ -1,6 +1,6 @@
 <template>
     <scroll-view scroll-y class="main-scroll">
-        <view class="scrollmain">
+        <view v-if="unreadMsgList.length" class="scrollmain">
             <view
                 class="list-card press-button"
                 v-for="(item, index) in unreadMsgList"
@@ -34,6 +34,7 @@
                 </view>
             </view>
         </view>
+        <empty v-else pdTop="200" content="暂无消息~"></empty>
     </scroll-view>
 </template>