Payment Term Security

This module adds a new permission called "Change payment terms in partners and invoices". It is a hidden group that is automatically granted to the Odoo administrator and superuser, and it also includes the standard invoicing permission.

When a user does not have this permission:

• On invoice forms, the Payment Terms field becomes read-only, so the value can be seen but not modified.
• On contact/partner forms, both the customer Payment Terms and the supplier Payment Terms fields become read-only.

The restriction is applied when the form is opened, so it affects the normal user interface in Odoo. Users who do have the permission can still change payment terms as usual.

The module touches the account.move and res.partner models, which are the models behind invoices and contacts. No new menus or reports are added; the change is only about locking the payment term fields for users who lack the permission.