Calsoft-v3

Description:

In the Add Sales page, the system allows the user to enter a discount amount greater than the product value without displaying any validation message.

Steps to Reproduce:
Navigate to Sales → Add Sales.
Add a product with a specific price.
Enter a discount amount greater than the product value.
Observe the discount field and total amount.
Try to save the sale.
The system accepts a discount amount greater than the product value without displaying any validation message.

Expected Result:

The system should validate the discount amount and should not allow a discount greater than the product value. An appropriate validation message should be displayed.