feat: initial commit — backend API + student cabinet frontend

- Go backend: auth (JWT), points earn/spend, QR token generation,
  partners, admin grant/stats endpoints with chi router
- Next.js 14 frontend: login, student dashboard, transaction history,
  QR display, partners list
- PostgreSQL migrations (4 tables), Redis cache, Docker Compose
- CORS middleware, role-based route protection, Zustand auth store

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

frontend/app/(student)/qr/page.tsx

@@ -0,0 +1,22 @@
+'use client';
+
+import Link from 'next/link';
+import { QRDisplay } from '@/components/QRDisplay';
+
+export default function QRPage() {
+  return (
+    <main className="flex min-h-screen flex-col items-center justify-center gap-6 p-6">
+      <h1 className="text-xl font-bold text-white">Оплата поинтами</h1>
+
+      <QRDisplay />
+
+      <p className="max-w-xs text-center text-sm text-gray-500">
+        Покажи этот QR кассиру. Он действителен 5 минут и может быть использован только один раз.
+      </p>
+
+      <Link href="/dashboard" className="text-sm text-blue-400 hover:text-blue-300">
+        ← Назад
+      </Link>
+    </main>
+  );
+}