fix: auto add configured device to basket on step 3 transition

shop/components/order-wizard.tsx

@@ -501,7 +501,15 @@ export function OrderWizard({
     })
   }
 
-  const nextStep = () => setStep(s => s + 1)
+  const nextStep = () => {
+    if (step === 3 && allCategoriesFilled && productValidationErrors.length === 0) {
+      const hasProduct = Object.values(selections).some(sel => sel.productId || (sel.productIds && sel.productIds.length > 0))
+      if (hasProduct) {
+        addToBasket()
+      }
+    }
+    setStep(s => s + 1)
+  }
   const prevStep = () => setStep(s => s - 1)
 
   // Abrechnungsmodell wechseln (und Selektionen der Kategorien anpassen)