Dynamic AGB address, real shipping costs on /versand instead of hardcoded constants

- AGB: name/address/email now come from company-settings via new
  VertragspartnerBlock (mid-document, see LegalPages.ts's contentPart2).
- VersandSections/VersandModal/CartContent/CheckoutContent/versand page:
  shipping cost and free-shipping threshold now come from the real
  ShippingMethods data (already fetched elsewhere for checkout), not the
  hardcoded lib/shipping.ts constants — those had already drifted from
  the real Payload values once. lib/shipping.ts deleted, nothing left to
  export.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/versand/page.tsx

@@ -4,7 +4,7 @@ import { Reveal } from "../components/Reveal";
 import { Footer } from "../components/Footer";
 import { VersandSections } from "./components/VersandSections";
 import { VersandTOC, MobileVersandTOC } from "./components/VersandTOC";
-import { getShippingSettings } from "../lib/payload";
+import { getShippingSettings, getShippingMethods } from "../lib/payload";
 
 export const metadata: Metadata = {
   title: "Versand",
@@ -14,7 +14,12 @@ export const metadata: Metadata = {
 };
 
 export default async function VersandPage() {
-  const shipping = await getShippingSettings();
+  const [shipping, shippingMethods] = await Promise.all([getShippingSettings(), getShippingMethods()]);
+  // Same "first active method / lowest threshold among active methods"
+  // convention as CartContent.tsx/getTrustBadges() — see VersandSections.tsx.
+  const shippingCost = shippingMethods[0]?.price ?? 0;
+  const shippingMethodThresholds = shippingMethods.map((m) => m.freeShippingThreshold).filter((t): t is number => t !== null);
+  const freeShippingThreshold = shippingMethodThresholds.length > 0 ? Math.min(...shippingMethodThresholds) : null;
 
   return (
     <>
@@ -47,7 +52,7 @@ export default async function VersandPage() {
             <VersandTOC />
           </div>
           <div className="w-full lg:flex-1 max-w-[45rem]">
-            <VersandSections withAnchors shipping={shipping} />
+            <VersandSections withAnchors shipping={shipping} shippingCost={shippingCost} freeShippingThreshold={freeShippingThreshold} />
           </div>
         </div>
       </main>