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/jisuan/index.html

@@ -45,6 +45,7 @@ button{font:inherit;border:0;background:none;color:inherit;cursor:pointer}
 .mb-brand{text-align:center;color:#C29A8F;font-size:11.5px;line-height:1.7}.mb-brand img{display:block;width:86px;height:auto;margin:0 auto 6px;opacity:.6}.mb-brand p{display:flex;align-items:center;justify-content:center;gap:8px;margin:0;letter-spacing:.06em}.mb-brand p::before,.mb-brand p::after{content:'';width:28px;height:1px;background:#EAD3CC}
 #scroll .mb-brand{margin:20px 0 0;padding-bottom:calc(120px + env(safe-area-inset-bottom))}   /* 给底部 Tab 让位 */
 </style>
+<script src="../../js/host-nav.js?v=26110903"></script>
 </head>
 <body>
 <div id="scroll">
@@ -133,6 +134,7 @@ button{font:inherit;border:0;background:none;color:inherit;cursor:pointer}
   });
   /* 返回：从首页点进来就 back；直接打开（分享 / 刷新）就回首页，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;
   });