improvments are done

src/app/utils/item.utils.ts

@@ -0,0 +1,13 @@
+import { Item } from '../models';
+
+export function getDiscountedPrice(item: Item): number {
+  return item.price * (1 - item.discount / 100);
+}
+
+export function getMainImage(item: Item): string {
+  return item.photos?.[0]?.url || '';
+}
+
+export function trackByItemId(index: number, item: Item): number {
+  return item.itemID;
+}