Mail Template Substitute Account Move

This module works together with the Mail Template Substitute feature and the Accounting app. It changes what happens when a user clicks the send-and-print action on an invoice, bill, credit note or other accounting entry (account.move).

• Before the email composer opens, the module looks up whether a substitute email template has been configured for the relevant composition mode and the currently selected mail template.
• If a substitute template is found, it is used as the default template in the email composer instead of the original one.
• If no substitute is configured, nothing changes and the normal template is used.

The substitution is applied automatically, so users do not have to pick the correct template manually each time. The module does not add new menus, screens, fields or reports of its own; it only extends the existing send-and-print flow in the Accounting app. It also does not change any amounts, taxes or accounting entries — it only affects which email template is proposed when sending an accounting document.