Initial commit: Shopify storefront Next.js template

Next.js 16 + React 19 storefront template with Shopify Storefront API
integration, Tailwind v4, and shadcn/ui components.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0111qSr3KopyGRsJ6LznR1xZ

app/collections/[handle]/page.tsx

@@ -0,0 +1,26 @@
+import Header from '@/components/shopify/header';
+import Footer from '@/components/shopify/footer';
+import CollectionDetail from '@/components/shopify/collection-detail';
+
+export default function Page() {
+  return (
+    <>
+      <Header
+        storeName="Stride"
+        logoUrl=""
+        links={[
+          { label: 'Products', url: '/' },
+          { label: 'Collections', url: '/collections' },
+        ]}
+      />
+      <CollectionDetail />
+      <Footer
+        storeName="Stride"
+        logoUrl=""
+        tagline="Your premium shopping destination"
+        copyright="© 2026 Stride. All rights reserved."
+        links={[]}
+      />
+    </>
+  );
+}