Enatega Admin Dashboard: When adding a Coupon, Discount field is allowing to enter more than 100%

Describe the bug

When adding a coupon, the Discount field allows users to enter a value greater than 100%, which is invalid. This could lead to incorrect calculations and potential financial losses or Also display an error message that discount percentage should not exceed 100%.

To Reproduce

Steps to reproduce the behavior:

1. Navigate to the Coupon Management section.
2. Click on Add New Coupon.
3. Enter a discount value greater than 100% (e.g., 150%).
4. Save the coupon, it will not save it so it should display an error message or restrict it to not enter amount greater than 100%.

Expected behavior

The system should restrict the Discount field to a maximum of 100% and display a validation error if a higher value is entered.

Desktop (please complete the following information):

OS: [e.g. Windows]
Browser [e.g. Chrome]
Version [e.g. Latest]

Inizia nel flusso Coupon Management dell'Enatega Admin Dashboard, nello specifico nel campo Add New Coupon Discount. Riproduci il problema con un valore superiore al 100%, quindi traccia il comportamento esistente di salvataggio e validazione; il lavoro è completato quando i valori superiori al 100% vengono rifiutati e viene visualizzato un errore di validazione appropriato.