// In-Telegram polish for every site page. No-ops in a normal browser; inside
// the Mini App webview it lazy-loads the vendored Telegram SDK (CSP stays
// script-src 'self') and wires theme + BackButton so pages feel native.
(function () {
  'use strict';
  var inTg = false;
  try { inTg = sessionStorage.getItem('rmcTg') === '1'; } catch (e) {}
  if (!inTg && (window.TelegramWebviewProxy !== undefined || /tgWebApp(Data|Platform)/.test(location.hash))) inTg = true;
  if (!inTg) return;
  try { sessionStorage.setItem('rmcTg', '1'); } catch (e) {}

  function boot() {
    var tg = window.Telegram && window.Telegram.WebApp;
    if (!tg || !tg.initData) return;
    tg.ready();
    try { tg.expand(); } catch (e) {}
    try { tg.setHeaderColor('#071421'); tg.setBackgroundColor('#071421'); } catch (e) {}
    // Back button mirrors webview history: /app enters via location.replace, so
    // the landing dashboard has no history and stays clean; any deeper page
    // (tools, training, another member view) gets a native back arrow.
    var bb = tg.BackButton;
    if (bb && history.length > 1) {
      bb.show();
      bb.onClick(function () { history.back(); });
    }
  }
  if (window.Telegram && window.Telegram.WebApp) { boot(); return; }
  var s = document.createElement('script');
  s.src = '/telegram-web-app.js';
  s.onload = boot;
  document.head.appendChild(s);
})();