fix(shop): display Backoffice for Zusatzleistung group in OrderSuccessPage

shop/app/order/success/page.tsx

@@ -118,7 +118,7 @@ export default async function OrderSuccessPage({
               {Object.entries(groupedItems).map(([deviceName, devItems]) => (
                 <div key={deviceName} className="space-y-2 border-b border-white/5 pb-3 last:border-0 last:pb-0">
                   <div className="bg-white/5 px-2 py-1 rounded text-xs text-primary font-bold">
-                    Kasse: {deviceName}
+                    {deviceName === 'Zusatzleistung' ? 'Backoffice' : `Kasse: ${deviceName}`}
                   </div>
                   {devItems.map((item) => (
                     <div key={item.product_id} className="space-y-1 pl-2">