fix(bestellbestaetigung): rebuild testimonial band, tighten hero, add spotlightEyebrow

Testimonial band: rebuilt as a proper flexbox two-column layout
(photo column with an explicit width, quote in a flex-1 sibling)
instead of an absolutely-positioned text block offset with
percentage margin/padding — that measured against the row's full
width and, combined with a max-w- on the text box, left almost no
room for the actual text on wide viewports (wrapped to one word per
line). Also dropped the muted-bg box behind the quote and widened
the photo fade to match the actual mockup, which has no separate
colored panel there at all.

Hero: removed the separate big checkmark badge — the 4-step bar
right above it already renders every step as a checkmark, so it was
just repeating that. Added more top spacing to compensate. Dropped
"Deine Bestellung macht sich jetzt auf den Weg zu dir." and added
"inkl. MwSt." under Gesamtbetrag for consistency with /cart and
/checkout.

Wired the new Products.spotlightEyebrow field (CMS-editable "Neu im
Shop" label) through lib/payload.ts into ProductSpotlight.tsx.

app/components/ProductSpotlight.tsx

@@ -47,7 +47,7 @@ export async function ProductSpotlight() {
         </div>
 
         <div className="flex flex-col gap-4 items-start flex-1 min-w-0 w-full">
-          <p className="font-bold text-h-small text-brand">Neu im Shop</p>
+          <p className="font-bold text-h-small text-brand">{product.spotlightEyebrow || "Neu im Shop"}</p>
           <p
             className="font-semibold text-h-section text-text-primary"
             style={{ fontFamily: "var(--font-lora)" }}