Fix: Update products/[slug]/page to use showAsReadyMade

Changed related products query to filter by showAsReadyMade instead of deleted showOnProducts column on the Product model.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/app/products/[slug]/page.tsx

@@ -14,7 +14,7 @@ export default async function StandardProductPage({ params }: { params: { slug:
   const product = toProductDTO(row, activePromotions, 'plain');
 
   const relatedRows = await prisma.product.findMany({
-    where: { category: product.category, showOnProducts: true, NOT: { id: product.id } },
+    where: { category: product.category, showAsReadyMade: true, NOT: { id: product.id } },
     take: 4,
   });
   const related = relatedRows.map((p) => toProductDTO(p, activePromotions, 'plain'));