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/(partner)/scan/page.tsx

@@ -0,0 +1,8 @@
+export default function ScanPage() {
+  // TODO: QR scanner + amount input form → POST /api/v1/partner/spend → show result
+  return (
+    <main className="p-6">
+      <p className="text-gray-500">Partner scan — coming soon</p>
+    </main>
+  );
+}