Voeg CMS voor de Publieke Website toe (overgenomen van rikx-org)

Pagina-editor, hoofdmenu, SEO en media onder Publieke Website → Pagina's
(/website), los van het CMS in rikx-org: eigen tabellen in de beheerdatabase.
Blokken (hero, tekstblok, testimonial, voordelenlijst, call-to-action) met
Quill, NL/EN/DE met terugval op NL, en afbeeldingsupload naar MEDIA_DIR met
een openbare /media-route (CSP-sandbox).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/website/[slug]/page.tsx

@@ -0,0 +1,44 @@
+import Link from "next/link";
+import { notFound } from "next/navigation";
+import { requireAdmin } from "../../../lib/auth";
+import {
+  getPage,
+  listBlockTranslationsForEditor,
+  listContentBlocks,
+  listMediaImages,
+  listPageTranslations,
+} from "../../../lib/cms";
+import { AppHeader } from "../../AppHeader";
+import { PageEditor } from "../PageEditor";
+
+export default async function WebsitePageEditor({ params }: { params: Promise<{ slug: string }> }) {
+  const session = await requireAdmin();
+  const { slug } = await params;
+  const page = getPage(slug);
+  if (!page) notFound();
+
+  return (
+    <div className="min-h-screen bg-zinc-50 dark:bg-zinc-950">
+      <AppHeader email={session.email} active="website" />
+
+      <main className="max-w-5xl mx-auto px-4 sm:px-6 py-10">
+        <Link href="/website" className="text-sm text-zinc-500 hover:text-zinc-900 dark:hover:text-zinc-100">
+          ← Pagina&apos;s
+        </Link>
+        <h1 className="text-lg font-semibold text-zinc-900 dark:text-zinc-100 mt-2">
+          {page.nav_label || page.meta_title || slug}
+        </h1>
+        <p className="text-sm text-zinc-500 mt-1 mb-6">/{slug}</p>
+
+        <PageEditor
+          slug={slug}
+          page={page}
+          blocks={listContentBlocks(slug)}
+          mediaImages={listMediaImages()}
+          pageTranslations={listPageTranslations(slug)}
+          blockTranslations={listBlockTranslationsForEditor(slug)}
+        />
+      </main>
+    </div>
+  );
+}