✅ how should I deal with common/similar data types between the backend and front?

namespace BuyMe.ServiceAPI.Models
{
    public class ShopItemDTO
    {
        public string? Title { get; set; }
        public float Rating { get; set; }
        public int Price { get; set; }
        public int Id { get; set; }
        public bool IsOnSale { get; set; }

        public ShopItemDTO() { }
        //ShopItem is unique to the ServiceAPI
        //it has the GUID of the seller that we dont want to share
        public ShopItemDTO(ShopItem ShopItem) =>
        (Title, Rating, Price, Id, IsOnSale) = (ShopItem.Title, ShopItem.Rating, ShopItem.Price, ShopItem.Id, ShopItem.IsOnSale);
    }
}

namespace BuyMe.Models;

public class ShopItem_Front()
{
    public string? Title { get; set; }
    public float Rating {get; set;}
    public int Price { get; set; }
    public int Id { get; set; }
    public bool IsOnSale { get; set; }
};