侧边栏小工具添加自定义html

<div style="margin: 20px 0;">
  <a href="你的发帖页面链接" 
     style="display: block; width: 100%; background-color: #1677ff; color: white; padding: 12px 0; border-radius: 8px; text-align: center; text-decoration: none; font-size: 16px; font-weight: 500;">
    + 我要发帖
  </a>
</div>