fix(web): 注册页 API URL 改用 site.appBaseUrl，修正成功提示导航路径

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/register.njk

@@ -161,7 +161,7 @@ pageStyle: |
         </table>
       </div>
 
-      <p class="success-note">如忘记门店编码，登录后可在「系统设置 → 关于」中查看。</p>
+      <p class="success-note">如忘记门店编码，登录后可在「系统设置」中查看。</p>
       <a href="/app/" class="btn btn-primary" style="display:inline-flex;align-items:center;gap:8px;">
         <i data-lucide="log-in" class="icon"></i>前往登录
       </a>
@@ -172,7 +172,7 @@ pageStyle: |
 
 <script>
 (function() {
-  var API_URL = window.location.origin + '/api/v1/public/register';
+  var API_URL = "{{ site.appBaseUrl }}/api/v1/public/register";
 
   function $(id) { return document.getElementById(id); }