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/checkout/components/CheckoutContent.tsx

@@ -397,6 +397,11 @@ export function CheckoutContent({
     selectedShipping?.freeShippingThreshold !== undefined &&
     subtotal >= selectedShipping.freeShippingThreshold;
   const shipping = items.length === 0 || !cartHasShippableItem(items) || freeShipping ? 0 : selectedShipping?.price ?? 0;
+  // For VersandModal — same "lowest freeShippingThreshold among active
+  // methods" rule as CartContent.tsx/getTrustBadges(), independent of
+  // whichever method is currently selected in the radio list above.
+  const shippingMethodThresholds = shippingMethods.map((m) => m.freeShippingThreshold).filter((t): t is number => t !== null);
+  const lowestFreeShippingThreshold = shippingMethodThresholds.length > 0 ? Math.min(...shippingMethodThresholds) : null;
   const { totalSavings, discountAmount, total } = computeCartTotals(items, shipping, discount);
   const taxBreakdown = computeTaxBreakdown(
     items.map(({ entry, product }) => ({
@@ -1551,7 +1556,13 @@ export function CheckoutContent({
         </Reveal>
       </form>
 
-      <VersandModal open={versandOpen} onClose={() => setVersandOpen(false)} shipping={shippingSettings} />
+      <VersandModal
+        open={versandOpen}
+        onClose={() => setVersandOpen(false)}
+        shipping={shippingSettings}
+        shippingCost={shippingMethods[0]?.price ?? 0}
+        freeShippingThreshold={lowestFreeShippingThreshold}
+      />
     </>
   );
 }