feat(lang-switch): footer shows single word — 'English' on RU pages, 'Русский' on EN; keep path-aware href

public/cases/task-tracker/index.html

@@ -1151,8 +1151,7 @@
         <span class="footer__chunk footer__chunk--main">Дизайн и разработка сайта — Николай Мамадаев</span>
         <span class="footer__chunk footer__chunk--meta footer__attr"><span class="footer__sep" aria-hidden="true"> · </span><a href="../../cases/design-system/">Design System</a><span class="footer__sep" aria-hidden="true"> · </span><a href="../../cookie-policy/">Политика cookie</a></span>
         <span class="footer__chunk footer__chunk--lang"><span class="footer__sep" aria-hidden="true"> · </span><nav class="lang-switch" aria-label="Выбор языка" data-lang-switch>
-  <a class="lang-switch__btn" data-lang="ru" href="/">RU</a>
-  <a class="lang-switch__btn" data-lang="en" href="/en/">EN</a>
+  <a class="lang-switch__btn" data-lang="en" href="/en/">English</a>
 </nav>
 <script>
   (function () {
@@ -1161,10 +1160,8 @@
     var base = isEn ? p.slice(3) : p;
     var links = document.querySelectorAll("[data-lang-switch] [data-lang]");
     for (var i = 0; i < links.length; i++) {
-      var b = links[i];
-      var l = b.getAttribute("data-lang");
-      b.setAttribute("href", (l === "en" ? "/en/" : "/") + base);
-      if ((l === "en") === isEn) b.setAttribute("aria-current", "true");
+      var l = links[i].getAttribute("data-lang");
+      links[i].setAttribute("href", (l === "en" ? "/en/" : "/") + base);
     }
   })();
 </script>