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/wh-cm.js

@@ -70,7 +70,7 @@
   function repOf(c, me) { return { p: c.parent, n: me ? '我' : (c.nickname || '孕妈'), me: me, to: c.parentName, t: c.text, ts: c.at, st: me ? c.status : '' }; }
   function load() {
     if (loading || SIM) return; loading = true;
-    fetch('guangchang/cm.json?v=26110640').then(function (r) { return r.json(); }).then(function (j) {
+    fetch('guangchang/cm.json?v=26110641').then(function (r) { return r.json(); }).then(function (j) {
       var PP = j.p;
       SIM = (j.c[PID] || []).map(function (c, k) {
         var p = PP[c[0]];