host-nav：跳转标记只用真实 localStorage（maternal-bridge 镜像层会换掉 window.localStorage）+ cookie 兜底

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

topic/yingyang/index.html

@@ -178,7 +178,7 @@ h1 em{font-style:normal;background:linear-gradient(transparent 62%,rgba(240,138,
 .fade.in{opacity:1;transform:none}
 @media (prefers-reduced-motion:reduce){.fade{opacity:1;transform:none;transition:none}.amt .tr i{transform:none;transition:none}}
 </style>
-<script src="../../js/host-nav.js?v=26110907"></script>
+<script src="../../js/host-nav.js?v=26110908"></script>
 </head>
 <body>
 <svg width="0" height="0" style="position:absolute" aria-hidden="true">