Update post.html

templates/post.html

@@ -88,7 +88,7 @@
     <path d="M7 10h1v2H7v-2zM3 2v2H2v12h12v-3h2v4H2V2h1z"></path>
   </svg>
 </button>
-<button id="alignToggleBtn">切换文字对齐方式</button>
+<button id="alignToggleBtn" class="btn btn-invisible circle" title="切换文字对齐方式">排</button>
 {% endblock %}
 
 {% block content %}