Rewrite on the Bennett platform: Spring Boot + Vite/React SPA

Replaces the Next.js app. Same site, same look; the parts that were decisions rather
than markup now live in Java.

- catalogue, curated order, category filter and image URLs move from a TypeScript array
  into Postgres behind /api/products and /api/categories
- contact form uses the shared platform-starter-contact: validate, RECORD, send, then
  fan out to n8n. Recording first means a relay outage costs a notification, not an enquiry
- PageMetaController rewrites title/description/OG per route, replacing what Next's SSR
  gave crawlers and link-preview scrapers
- 50MB of photos leave the repo for the MinIO bucket, re-encoded to webp (14MB) with EXIF
  (including phone GPS) stripped
- fixes a catalogue typo: 'Strawberry Pie' was category 'Pies', which no filter matched, so
  it was unreachable unless browsing All

frontend/src/App.tsx

@@ -0,0 +1,40 @@
+import { useEffect } from 'react';
+import { Route, Routes, useLocation } from 'react-router-dom';
+import Header from '@/components/Header';
+import Footer from '@/components/Footer';
+import HomePage from '@/pages/Home';
+import ProductsPage from '@/pages/Products';
+import HistoryPage from '@/pages/History';
+import ContactPage from '@/pages/Contact';
+import NotFoundPage from '@/pages/NotFound';
+
+/**
+ * Client-side navigation keeps the previous scroll position, which lands you halfway down a page you
+ * just opened. Anchors like /#visit still need to work, so only reset when there isn't one.
+ */
+const ScrollToTop = () => {
+  const { pathname, hash } = useLocation();
+  useEffect(() => {
+    if (!hash) window.scrollTo(0, 0);
+  }, [pathname, hash]);
+  return null;
+};
+
+const App = () => (
+  <div className="min-h-screen bg-bakery-50 flex flex-col">
+    <ScrollToTop />
+    <Header />
+    <main className="flex-grow">
+      <Routes>
+        <Route path="/" element={<HomePage />} />
+        <Route path="/products" element={<ProductsPage />} />
+        <Route path="/history" element={<HistoryPage />} />
+        <Route path="/contact" element={<ContactPage />} />
+        <Route path="*" element={<NotFoundPage />} />
+      </Routes>
+    </main>
+    <Footer />
+  </div>
+);
+
+export default App;