Obx(): Wrapped the heart icon with Obx() to listen for changes in the favorite status, so the UI updates automatically when a product is favorited or unfavorited.
HeroIcon:
Used a conditional check (isFavorite) to decide between HeroIconStyle.solid (filled heart) and HeroIconStyle.outline (outlined heart).
Changed the heart color to Colors.red when the product is favorited and Colors.grey when it’s not.
