fix: bugs

pages/cert/type/_id.vue

@@ -4,7 +4,7 @@
     <section class="apply-top">
       <h1>{{detail.name}}认证</h1>
       <section class="info" v-html="detail.description" />
-      <section v-if="showCats.length > 0" class="developer-show">
+      <section v-if="showCats && showCats.length > 0" class="developer-show">
         <h4>认证开发者展示</h4>
         <div class="developer_show-list">
           <div class="avatar_list">