feat(nav): complete remaining zibll parity (search, i18n, senior menus, CSS)

- Remove obsolete dual-path nav CSS; add utilities + language dropdown styles
- Wire header/mobile translate switcher from i18n config
- Layout-2 inline search hot keywords panel; nav_folding on resize
- NavMenuOptions JSON editors for graphic_card / multi_column_links
- Section-navs zibll posts-nav-lists; page-navs enqueue; mobile article TOC box
- SPA/PHP user-card publish type; rebuild admin assets

assets/js/core/nav.js

@@ -1,13 +1,15 @@
 /**
- * AKSRT nav chrome — zibll contract (body.mobile-navbar-show, folding, chevron).
- * Drawer open/close is handled by aksrt-runtime [data-toggle-class].
+ * AKSRT nav chrome — zibll contract (folding, chevron, language, drawer a11y).
+ * Drawer open/close via aksrt-runtime [data-toggle-class] → body.mobile-navbar-show.
  */
 (function () {
   "use strict";
 
-  function appendChevrons() {
-    document.querySelectorAll(".navbar-top li.menu-item-has-children > a").forEach(function (a) {
-      if (a.querySelector(".fa-angle-down")) return;
+  var foldTimer = null;
+
+  function appendChevrons(root) {
+    (root || document).querySelectorAll(".navbar-top li.menu-item-has-children > a").forEach(function (a) {
+      if (a.querySelector(".fa-angle-down, .fas.fa-angle-down")) return;
       var i = document.createElement("i");
       i.className = "fa fa-angle-down ml6";
       i.setAttribute("aria-hidden", "true");
@@ -15,18 +17,30 @@
     });
   }
 
+  function clearFolding() {
+    var more = document.querySelector(".navbar-nav > li.aksrt-nav-more");
+    if (!more) return;
+    var sub = more.querySelector(".sub-menu");
+    var nav = more.parentNode;
+    if (sub && nav) {
+      while (sub.firstChild) {
+        nav.insertBefore(sub.firstChild, more);
+      }
+    }
+    more.remove();
+  }
+
   function navFolding() {
     var collapse = document.querySelector(".navbar-collapse");
     var nav = document.querySelector(".navbar-nav");
     if (!collapse || !nav) return;
-    if (window.innerWidth <= 996) return;
 
+    clearFolding();
+
+    if (window.innerWidth <= 996) return;
     var header = document.querySelector(".header");
     if (header && header.offsetHeight <= 81) return;
 
-    // Already folded?
-    if (nav.querySelector("li.aksrt-nav-more")) return;
-
     var surplus = collapse.clientWidth;
     Array.prototype.forEach.call(collapse.children, function (child) {
       if (!child.classList.contains("navbar-nav")) {
@@ -40,9 +54,7 @@
     var foldItems = [];
     Array.prototype.forEach.call(nav.children, function (li) {
       navsWidth += li.offsetWidth || 0;
-      if (navsWidth > surplus) {
-        foldItems.push(li);
-      }
+      if (navsWidth > surplus) foldItems.push(li);
     });
     if (!foldItems.length) return;
 
@@ -51,14 +63,33 @@
     more.innerHTML =
       '<a href="javascript:void(0);"><i class="fas fa-bars" aria-hidden="true"></i></a><ul class="sub-menu"></ul>';
     var sub = more.querySelector(".sub-menu");
-    foldItems.forEach(function (li) {
-      sub.appendChild(li);
-    });
+    foldItems.forEach(function (li) { sub.appendChild(li); });
     nav.appendChild(more);
+    appendChevrons(more);
+  }
+
+  function scheduleFold() {
+    if (foldTimer) clearTimeout(foldTimer);
+    foldTimer = setTimeout(function () {
+      try { navFolding(); } catch (e) {}
+    }, 80);
+  }
+
+  function bindLanguage() {
+    document.addEventListener("click", function (e) {
+      var btn = e.target && e.target.closest ? e.target.closest(".translate-button[data-language]") : null;
+      if (!btn) return;
+      e.preventDefault();
+      var lang = btn.getAttribute("data-language");
+      if (!lang) return;
+      try { localStorage.setItem("aksrt_lang", lang); } catch (err) {}
+      var url = new URL(window.location.href);
+      url.searchParams.set("lang", lang);
+      window.location.href = url.toString();
+    });
   }
 
   function bindDrawerA11y() {
-    // Esc closes mobile nav via body class.
     document.addEventListener("keydown", function (e) {
       if (e.key === "Escape" && document.body.classList.contains("mobile-navbar-show")) {
         document.body.classList.remove("mobile-navbar-show");
@@ -68,18 +99,14 @@
 
   function init() {
     appendChevrons();
-    try {
-      navFolding();
-    } catch (err) {
-      // ignore fold failures
-    }
+    scheduleFold();
+    bindLanguage();
     bindDrawerA11y();
+    window.addEventListener("resize", scheduleFold, { passive: true });
   }
 
   if (window.AksrtFrontend && typeof window.AksrtFrontend.register === "function") {
-    window.AksrtFrontend.register("aksrt-nav-chrome", function () {
-      init();
-    });
+    window.AksrtFrontend.register("aksrt-nav-chrome", function () { init(); });
   } else if (document.readyState === "loading") {
     document.addEventListener("DOMContentLoaded", init);
   } else {