Supplier Invoice Date in header

This module is a small usability change for the supplier invoice screen in Odoo Accounting.

On the supplier invoice form, the accounting date is normally shown in a different part of the form than the invoice date. This module moves the accounting date so that it appears right after the invoice date, keeping the two dates side by side.

• It only changes the layout of the supplier invoice form; no new fields, menus, buttons, reports or business rules are added.
• It affects the account.invoice model's supplier invoice view, which is the screen where users enter and review vendor bills.
• The invoice date and the accounting date remain the same fields with the same behaviour; only their position on the screen changes.

Because the code only repositions an existing field, there are no automatic checks, computations, default values, restrictions, emails or scheduled jobs introduced by this module. Users will simply find the accounting date more visible and quicker to verify when recording supplier invoices.