Frontend support for the Hero block; H1 moves out of the hardcoded wrapper

app/[slug]/page.tsx and LivePageContent.tsx no longer render a
hardcoded H1 from page.title — that's now the Hero block's job (see
HeroBlock.ts's own comment on why). Breadcrumb stays, still built
from page.title.

Also backfilled /lebensuhr's already-migrated Pages document with a
Hero block (order 0) carrying its real headline — without it the
page would have lost its H1 entirely once the hardcoded wrapper was
removed.

app/components/LivePageContent.tsx

@@ -8,8 +8,9 @@ import { mapPayloadPage, type PayloadPage, type Page } from "../lib/payload";
 
 const PAYLOAD_URL = process.env.NEXT_PUBLIC_PAYLOAD_URL || "https://payload.mk360.de";
 
-// Live-previewable subset of a Pages document: breadcrumb/H1 and the
-// layout blocks — same "editable subset only" scope as LivePostContent.tsx
+// Live-previewable subset of a Pages document: the breadcrumb and the
+// layout blocks (the H1 now lives in the first block, usually a "hero" —
+// see HeroBlock.ts) — same "editable subset only" scope as LivePostContent.tsx
 // (see that file's own comment). `testimonialsRef` blocks are skipped here
 // (see renderPageBlockSync's own comment) since they need an async fetch a
 // client component can't perform inline; editing that block still shows up
@@ -30,12 +31,6 @@ export function LivePageContent({ initialPage }: { initialPage: Page }) {
           <span>›</span>
           <span className="text-text-primary">{page.title}</span>
         </p>
-        <p
-          className="font-semibold text-[clamp(2.25rem,1.393rem+1.786vw,3rem)] text-text-primary leading-[1.15]"
-          style={{ fontFamily: "var(--font-playfair)" }}
-        >
-          {page.title}
-        </p>
       </Reveal>
 
       <Reveal delay={0.1} className="w-full max-w-[48rem] mx-auto px-[var(--layout-padding-x)] pb-14 flex flex-col gap-5">