新增paint页面，暂时放弃api来fetch数据构建页面，预计可能还有大量问题，暂时打算先整理所有的文件

templates/blog/include/navbar.html

@@ -4,7 +4,7 @@
             {"id":1, "name": "首页", "url": url_for('blog.home')},
             {"id":2, "name": "关于", "url": url_for('blog.about')},
             {"id":3, "name": "文章", "url": url_for('blog.posts_list')},
-            {"id":4, "name": "mirrors", "url": url_for('blog.autoindex')},
+            {"id":4, "name": "folders", "url": url_for('blog.autoindex')},
             {"id":5, "name": "study", "url": url_for('study.home')},
 ]%}
 <div id="navbar1">
@@ -16,4 +16,5 @@
     {% endfor %}
     <a id="url_" href="https://api.ww3.tw">api</a>
     <a id="url_" href="https://gitea.ww3.tw">gitea</a>
-</div>
+    <a id="url_" href="./class">class</a>
+</div>