Custom post content blocks (images/gallery/video/quote) + backend-driven SEO settings

RichText.tsx switched to Payload's official React renderer + custom
JSXConverters (same call signature, LiveRichText/LivePostContent
untouched) — needed to render the new Lexical Blocks the Payload repo's
Posts.content just gained. Converters follow the existing CMS-image
convention (relative + aspect-[...] + fill + object-cover); the video
block resolves YouTube/Vimeo links to an iframe embed.

New getSeoSettings() fetcher (same pattern as getKleinunternehmer()),
app/layout.tsx now generateMetadata() reading it with the same fallback
values it used to hardcode. Per-post SEO overrides (seoTitle/
seoDescription/seoImage) wired into the blog detail page's metadata,
falling back to title/excerpt/thumbnail when empty.

Also fixed while auditing every page's metadata: missing descriptions on
3 konto pages, a static title on the dynamic order-detail route, and
missing OG images on /shop and /blog.

app/konto/bestellungen/[orderNumber]/page.tsx

@@ -13,10 +13,20 @@ import { buildTrackingUrl, CARRIER_LABELS } from "../../../lib/tracking";
 import { OrderActionButton } from "./components/OrderActionButton";
 import { OrderStatusBadge } from "../../components/OrderStatusBadge";
 
-export const metadata: Metadata = {
-  title: "Bestelldetails",
-  robots: { index: false, follow: true },
-};
+// Dynamic (was a static "Bestelldetails" title despite this being a
+// per-order route) — just formats the already-known order number into
+// the title, no extra fetch needed for a noindex account page.
+export async function generateMetadata({
+  params,
+}: {
+  params: Promise<{ orderNumber: string }>;
+}): Promise<Metadata> {
+  const { orderNumber } = await params;
+  return {
+    title: `Bestellung ${decodeURIComponent(orderNumber)}`,
+    robots: { index: false, follow: true },
+  };
+}
 
 export default async function KontoBestellungDetailPage({ params }: { params: Promise<{ orderNumber: string }> }) {
   const { orderNumber } = await params;