fix: improve accessibility and remove unnecessary attributes

Enhanced accessibility by wrapping time display in a semantic `<time>` element, ensuring better screen reader support. Removed inline styles and onclick attributes from elements, simplifying the code and improving performance.

src/components/item.astro

@@ -20,7 +20,9 @@ const timeago = datetime.isBefore(dayjs().subtract(1, 'w')) ? datetime.format('H
   <div class="time-box">
     <div class="dot"></div>
     <div class="time">
-      <a href={`${SITE_URL}posts/${post.id}`} title={post.datetime} class="item-link">{timeago}</a>
+      <a href={`${SITE_URL}posts/${post.id}`} title={post.datetime} class="item-link">
+        <time datetime={post.datetime} title={timeago}>{timeago}</time>
+      </a>
     </div>
   </div>
   {post.content.length > 0 && <div class={`text-box content`} set:html={post.content} />}