Customer Credit Payments receipt does not show the paid amount

Description:

Title: [BUG] Credit payments receipts do not show the actual amount paid by the customer

Description: There is a bug in the Credit Payments section regarding the receipts/reports generated when a customer pays off or makes a partial payment toward their credit balance.

Issue details: When a customer makes a credit payment (pago de cuenta corriente / fiado), the generated payment report or receipt fails to display the actual amount paid in that specific transaction. Instead, it shows incorrect or incomplete information, making it impossible to properly document the payment for the customer or keep an accurate audit trail.

Steps to reproduce:

Go to Credit Payments.
Select a customer with an outstanding balance .
Process a partial or full payment.
Print the payment receipt.

Expected result: The receipt/report should clearly state the payment details, including:

Amount paid in this transaction (the specific amount the customer just paid)
Remaining balance
[FEATURE] Previous balance

Actual result: The report/receipt does not show the amount paid by the customer in that transaction.

Impact: Without the paid amount displayed on the receipt, store owners cannot provide customers with valid proof of payment, leading to confusion and accounting discrepancies.