feat: BLACK HEART DANCE HOUSE landing page

Landing page with Hero, About, Team, Classes, and Contact sections.
Light/dark mode, scroll reveal animations, Yandex Maps, responsive design.
Next.js 16 + Tailwind v4 + TypeScript.

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

src/components/layout/Footer.tsx

@@ -0,0 +1,18 @@
+import { BRAND } from "@/lib/constants";
+import { siteContent } from "@/data/content";
+import { SocialLinks } from "@/components/ui/SocialLinks";
+
+export function Footer() {
+  const { contact } = siteContent;
+  const year = new Date().getFullYear();
+
+  return (
+    <footer className="surface-muted theme-border border-t">
+      <div className="section-container flex flex-col items-center gap-4 py-8 sm:flex-row sm:justify-between">
+        <p className="muted-text text-sm">
+          &copy; {year} {BRAND.name}
+        </p>
+      </div>
+    </footer>
+  );
+}