style(post): enhance post separator and adjust tag display for improved layout

templates/tag.html

@@ -21,9 +21,20 @@
               <span class="post-date" th:text="${#dates.format(post.spec.publishTime,'yyyy-MM-dd')}"
                 >发布时间</span
               >
-              :: <span class="post-list-title" th:text="${post.spec.title}">文章标题</span></a>
+              <span class="post-separator">
+                <span></span>
+                <span></span>
+                <span></span>
+                <span></span>
+              </span>
+              <span class="post-list-title" th:text="${post.spec.title}">文章标题</span></a>
               <span class="post-tags-inline">
-                ::
+                <span class="post-separator">
+                  <span></span>
+                  <span></span>
+                  <span></span>
+                  <span></span>
+                </span>
                 <span th:each="tag : ${post.tags}">
                   <a
                   th:href="@{${post.status.permalink}}"