fix 书籍介绍展开显示优化

@@ -17,7 +17,7 @@
     <div class="text-wrapper" @click="handle">
       <van-row align="center" justify="center" style="position: relative; top: 50%; transform: translateY(-50%);">
         <van-col span="20" style="color: #713610;"><slot></slot></van-col>
-        <van-col span="4"><van-icon name="arrow" color="#c5c5c5" size="1.25rem" /></van-col>
+        <van-col span="4" style="text-align: center;"><van-icon name="arrow" color="#c5c5c5" size="1.25rem" /></van-col>
       </van-row>
     </div>
   </div>

@@ -141,12 +141,13 @@ const onToggle = (v) => {
   isToggle.value = v
 }
 
-onMounted(() => {
+// DOM操作需要等待执行
+setTimeout(() => {
   // 判断是否显示简介的展开图标
   nextTick(() => {
     hasToggle.value = tools.hasEllipsis('book-intro');
   })
-})
+}, 500);
 
 /**
  * 书籍订阅