Feature Request: Display Overpaid Amount on Invoice/Payment Voucher

The customer is requesting a feature enhancement in Wafeq where, if a customer pays more than the invoice amount, the extra payment should appear directly within the invoice or payment voucher as an overpaid amount.

Currently, the extra amount only appears in the customer statement, but the customer would like it to be clearly reflected in the invoice/payment record itself, not just as a separate receipt.