Pay 'any amount' - updated Pay By Bank UX

Some PayID payment requests are set up as open static PayIDs, allowing client's customers to make multiple payments without a predefined amount. Previously, this resulted in a blank amount field in the Pay by Bank checkout UX, which could be unclear for some customers.

The Pay by Bank checkout UX now displays “Pay any amount” when no fixed amount is included in the PayID payment request. This provides clearer guidance, reduces confusion, and helps customers understand that they can enter the amount they wish to pay.