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/components/VersandSections.tsx

@@ -1,5 +1,4 @@
 import Link from "next/link";
-import { SHIPPING_COST, FREE_SHIPPING_THRESHOLD } from "../../lib/shipping";
 import { formatPrice } from "../../lib/format";
 import type { ShippingSettings } from "../../lib/payload";
 
@@ -49,9 +48,21 @@ function Section({
 export function VersandSections({
   withAnchors = false,
   shipping,
+  shippingCost,
+  freeShippingThreshold,
 }: {
   withAnchors?: boolean;
   shipping: ShippingSettings;
+  /** Price of the default (first active, i.e. Standard) ShippingMethod —
+   * same value/estimate CartContent.tsx already computes for its own
+   * order-summary line, threaded down here instead of this component
+   * having its own hardcoded lib/shipping.ts constant, which is exactly
+   * what let this text drift from the real Payload ShippingMethods price
+   * (see lib/shipping.ts's own comment on this). */
+  shippingCost: number;
+  /** Lowest freeShippingThreshold among active ShippingMethods, or null if
+   * none has one — same rule CartContent.tsx/getTrustBadges() already use. */
+  freeShippingThreshold: number | null;
 }) {
   return (
     <div className="flex flex-col gap-10 items-start w-full">
@@ -72,9 +83,9 @@ export function VersandSections({
 
       <Section id="versandkosten" title="Versandkosten" withAnchor={withAnchors}>
         <p>
-          Die Versandkosten innerhalb Deutschlands betragen pauschal {formatPrice(SHIPPING_COST)}{" "}
-          pro Bestellung. Ab einem Bestellwert von {formatPrice(FREE_SHIPPING_THRESHOLD)} versenden
-          wir kostenlos.
+          Die Versandkosten innerhalb Deutschlands betragen pauschal {formatPrice(shippingCost)}{" "}
+          pro Bestellung.
+          {freeShippingThreshold !== null && ` Ab einem Bestellwert von ${formatPrice(freeShippingThreshold)} versenden wir kostenlos.`}
         </p>
         <p>Alle angegebenen Preise verstehen sich inklusive der gesetzlichen Mehrwertsteuer.</p>
         <p>