fixed some bugs

src/components/ProductCard/index.jsx

@@ -225,6 +225,12 @@ const ProductCard = ({
 
   const { name, price_amount, old_price_amount, media = [], reviews } = product;
 
+  // Hesaplanmış indirim oranı
+  let calculatedDiscount = null;
+  if (!product.discount && old_price_amount && price_amount && old_price_amount > price_amount) {
+    calculatedDiscount = Math.round(((old_price_amount - price_amount) / old_price_amount) * 100);
+  }
+
   return (
     <>
       <div 
@@ -234,8 +240,10 @@ const ProductCard = ({
         onMouseLeave={() => setIsHovered(false)}
       >
         <div className={styles.imageContainer}>
-          {product.discount && (
-            <span className={styles.discountBadge}>-{product.discount}%</span>
+          {(product.discount || calculatedDiscount) && (
+            <span className={styles.discountBadge}>
+              -{product.discount ? product.discount : calculatedDiscount}%
+            </span>
           )}
           {product.stock === 0 && (
             <span className={`${styles.discountBadge} ${styles.outOfStock}`}>