刷新回子页面二修：不看 referrer，改看用户是否点过才离开（usernav）；从别的应用回首页、后退照旧算回首页；防来回跳；ugc 关时不记；广场标签方案 A 压回三行 (v26110641)

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

js/ugc.js

@@ -34,7 +34,7 @@
     }).catch(function () {});
 
   function apply(v) { on = !!v; window.__mbUgc = on; de.classList.toggle('ugc-off', !on); }
-  function goHome() { location.replace(home + (location.hash || '')); }
+  function goHome() { try { localStorage.removeItem('mmbox.lastsub.v1'); } catch (e) {} location.replace(home + (location.hash || '')); }   /* 11-07 别让首页「刷新回子页面」又送回来 */
   apply(on);
   if (guard && !on) de.style.visibility = 'hidden';   /* 还不知道开没开：先别露内容，免得关着时闪一下 */