feat(课程页): 为课程横幅添加点击跳转功能

@@ -19,6 +19,7 @@
             v-for="(banner, index) in bannerList"
             :key="index"
             class="relative"
+            @click="handleBannerClick(banner)"
           >
             <img
               :src="banner.banner || 'https://cdn.ipadbiz.cn/mlaj/images/featured-course.jpg'"
@@ -124,6 +125,15 @@ const $route = useRoute();
 const $router = useRouter();
 useTitle($route.meta.title);
 
+const handleBannerClick = (banner) => {
+  if (!banner.post_link) return;
+  if (banner.post_link.startsWith('http')) {
+    window.location.href = banner.post_link;
+  } else {
+    $router.push(banner.post_link);
+  }
+};
+
 // Current time for the countdown timer
 const todayDate = new Date();
 const formattedTime = featuredCourse.liveTime.split(":");