Fix: fix article list observer

src/components/article/ArticleList.vue

@@ -22,8 +22,7 @@ watch(lastElement, (el) => {
   }
   const observer = new IntersectionObserver(
     ([entry]) => {
-      if (entry.isIntersecting && hasNextPage.value) {
-        // params.pageNo += 1;
+      if (entry.isIntersecting && articles.value.length && hasNextPage.value) {
         currentPage.value += 1;
         searchList();
       }