优选集团：有数据才展示招聘职位

src/views/recruit/personal/home/components/preferredGroup/details.vue

@@ -73,7 +73,7 @@
     </div>
 
     <!-- 招聘职位 -->
-    <div class="recruit-position">
+    <div class="recruit-position" v-if="recruitPosition && recruitPosition.length">
       <h2>招聘职位</h2>
       <div>
         <div class="position-item d-flex" v-for="k in recruitPosition" :key="k.job.id">