Pos receipt gift card

When a customer pays with a gift card in the Point of Sale, this module adds the gift card information to the printed receipt. After the order is sent to the server, it looks up the gift cards linked to that order and stores their code and balance.

The receipt then shows a new section titled "Gift Card Codes" below the existing receipt content. For each gift card used, it displays the remaining balance, a scannable barcode, and the gift card code itself. This makes it easy for customers to keep or reuse the card.

The same information is also included when a receipt is reprinted from the ticket screen, so staff can retrieve the gift card details later.

The module works together with the loyalty program features of the Point of Sale. It reads gift card records from the loyalty.card model and extends the POS order, payment screen, and receipt reprint button. No new menus or settings screens are added; the change appears directly on the receipt output.