feat: thank Linux.do community in dashboard footer

frontend/src/dashboard.ts

@@ -83,7 +83,7 @@ export class Dashboard {
             <div class="storage-note">${icon('shield')}<div><strong>凭据留在你的加密保险箱</strong><p>管理员认证 · D1 加密存储 · 密钥仅在 Worker</p></div><span class="storage-tag">AES-256-GCM</span></div>
             <button class="quick-card" id="bottom-quick">${icon('terminal')}<span><strong>临时连接</strong><small>打开完整 SSH 工作台</small></span><span>↗</span></button>
           </section>
-          <footer class="home-footer"><span>EdgeSSH / Private workspace</span><span>首次保存时查询公网 IP 位置，失败时仍可连接。</span><a href="https://mappojs.com/" target="_blank" rel="noopener noreferrer">地图数据与灵感来自 Mappo.js</a></footer>
+          <footer class="home-footer"><span>EdgeSSH / Private workspace</span><span>首次保存时查询公网 IP 位置，失败时仍可连接。</span><span>感谢 Linux.do 社区的推广支持与分享空间。</span><a href="https://mappojs.com/" target="_blank" rel="noopener noreferrer">地图数据与灵感来自 Mappo.js</a></footer>
         </main>
       </div>
       <dialog id="host-editor-dialog" class="host-dialog" aria-labelledby="host-dialog-title">