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>

index.html

@@ -19,7 +19,7 @@
 <script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
 <!-- 共享助手：授权/跳商城/位置上报（分享卡片同步，见 docs/h5-auth-standard.md 第四节） -->
 <script src="/common/wx-auth.js?v=26102601"></script>
-<script src="js/host-nav.js?v=26110907"></script>
+<script src="js/host-nav.js?v=26110908"></script>
 <script src="js/login-gate.js?v=26110618"></script>
 <!-- 11-05 用户：「消消乐的推广 banner 图，不要有外面白色的边框」→ 去掉 .game-promo 外层白底（mama-box.css 里和其他模块共用一条白底规则，这里单独盖掉；夜间同） -->
 <style>.game-promo,html.night .game-promo{background:none!important;box-shadow:none!important;backdrop-filter:none!important;-webkit-backdrop-filter:none!important}