bug fixes

src/modules/home/components/StudentHome.vue

@@ -27,6 +27,8 @@ function handleChange(id: string, type: number) {
 function handleContestChange(data: ContestType) {
   router.push({ path: `/student/contest/lab/${data.id}`, query: { name: data.name } })
 }
+
+const learnURL = import.meta.env.VITE_SAAS_LEARN_URL
 </script>
 
 <template>
@@ -34,7 +36,7 @@ function handleContestChange(data: ContestType) {
     <router-link to="/student/lab" class="link1"></router-link>
     <router-link to="/student/contest/score" class="link2"></router-link>
     <router-link to="/student/contest" class="link3"></router-link>
-    <a :href="import.meta.env.VITE_SAAS_LEARN_URL" target="_blank" class="link4"></a>
+    <a :href="learnURL" target="_blank" class="link4"></a>
   </div>
   <div class="select-group">
     <el-select size="large" placeholder="我的实验课程" @change="handleChange($event, 1)">