Migrate to Stack A: PHP-fpm + nginx + supervisord, drop flat HTML + Python API

- Remove old flat HTML pages (index, about, blog, contact, reviews, services/*, locations/*)
- Remove Python/Flask API container (api/)
- Remove old root nginx.conf and components/
- Add infra/: full nginx.conf (http block at /etc/nginx/nginx.conf), php-fpm-pool.conf (TCP listen), supervisord.conf, entrypoint.sh (auto-generates ALTCHA_HMAC_KEY)
- Add src/: PHP router, page/service/location/blog templates, contact handler, altcha handler, promo endpoint, SQLite data files
- Rewrite Dockerfile: single container, tini PID 1, healthcheck, all env vars declared
- Update docker-compose.yml: port 8096, env_file, healthcheck
- Update .dockerignore: exclude .env.*, include robots.txt/sitemap.xml/404.html/500.html
- Update assets: tokens.css, promo-popup.css/js, altcha.min.js, refactored form.js/main.js

Verified: all 17 routes 200, protection audit PASS, Resend confirmed working

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

assets/js/main.js

@@ -1,5 +1,5 @@
 /* ============================================================
-   main.js — Scroll animations, counters, FAQ, BA slider
+   main.js: Scroll animations, counters, FAQ, BA slider
    ============================================================ */
 
 (function () {
@@ -128,7 +128,7 @@
     const video = document.querySelector('.hero-video-wrap video');
     if (!video) return;
     video.play().catch(() => {
-      // autoplay blocked — poster image is visible; nothing to do
+      // autoplay blocked: poster image is visible; nothing to do
     });
   }
 
@@ -145,8 +145,42 @@
     track.setAttribute('tabindex', '0');
   }
 
-  /* --- Boot ---------------------------------------------- */
+  /* --- Header scroll + mobile nav ------------------------- */
+  function initNav() {
+    var header  = document.getElementById('site-header');
+    var mobileNav = document.getElementById('mobileNav');
+    var menuBtn = document.querySelector('.header-menu-btn');
+    var closeBtn = document.getElementById('mobileNavClose');
+    var overlay = document.getElementById('mobileNavOverlay');
+
+    if (!header) return;
+
+    window.addEventListener('scroll', function () {
+      header.classList.toggle('scrolled', window.scrollY > 40);
+    }, { passive: true });
+
+    function openNav() {
+      mobileNav.classList.add('open');
+      mobileNav.setAttribute('aria-hidden', 'false');
+      if (menuBtn) menuBtn.setAttribute('aria-expanded', 'true');
+      document.body.style.overflow = 'hidden';
+    }
+
+    function closeNav() {
+      mobileNav.classList.remove('open');
+      mobileNav.setAttribute('aria-hidden', 'true');
+      if (menuBtn) menuBtn.setAttribute('aria-expanded', 'false');
+      document.body.style.overflow = '';
+    }
+
+    if (menuBtn)  menuBtn.addEventListener('click', openNav);
+    if (closeBtn) closeBtn.addEventListener('click', closeNav);
+    if (overlay)  overlay.addEventListener('click', closeNav);
+  }
+
+  /* --- Boot: initialize all modules ------------------------ */
   function boot() {
+    initNav();
     initScrollAnimations();
     initCounters();
     initFAQ();