v26110903 补：12 个独立专题页、测一测页接 host-nav（容器页返回走 navigateBack），广场打开测试开容器页

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

topic/zhichang/index.html

@@ -205,6 +205,7 @@ html.cm:not(.cm-all) .cm-more{display:flex;align-items:center;justify-content:ce
 <!-- 11-04 计算器模式（calc=1）走分步：一步一题、最后出结果，见 ../_shared/wizard.js -->
 <link rel="stylesheet" href="../_shared/wizard.css?v=26110464">
 <script src="../_shared/wizard.js?v=26110464"></script>
+<script src="../../js/host-nav.js?v=26110903"></script>
 </head>
 <body>
 <svg class="hide" aria-hidden="true" xmlns="http://www.w3.org/2000/svg">
@@ -410,6 +411,7 @@ html.cm:not(.cm-all) .cm-more{display:flex;align-items:center;justify-content:ce
 
   /* 返回：从首页点进来就 back；直接打开（分享 / 刷新）就回同目录的首页，身份原样带回 */
   $('#back').addEventListener('click', function () {
+    if (window.MBHost && MBHost.back(function () { location.href = '../../' + location.search + location.hash; })) return;   /* 11-09 容器页：回小程序上一页 */
     if (document.referrer && document.referrer.indexOf(location.host) >= 0 && history.length > 1) history.back();
     else location.href = '../../' + location.search + location.hash;
   });