feat(ui): implement line numbering feature for post content with dynamic updates

templates/index.html

@@ -12,7 +12,7 @@
       <div class="posts">
         <div class="post on-list" th:each="post : ${posts.items}">
           <h1 class="post-title">
-            <a th:text="'<' + ${post.spec.title} + '>'" th:href="${post.status.permalink}">Post Title</a>
+            <a th:text="'< ' + ${post.spec.title} + ' >'" th:href="${post.status.permalink}">Post Title</a>
           </h1>
           <div class="post-meta">
             <span class="post-date" th:text="${#dates.format(post.spec.publishTime,'yyyy-MM-dd')}">