Mail Print Message

This module adds a print action to messages in the chatter (the discussion area found on records such as contacts, sales orders or any other document).

• On each message that is not an internal note, a "Print Message" action with a printer icon appears in the message actions menu.
• Selecting it opens a PDF report for that message, generated with the standard Odoo report engine.
• The printed page shows the message subject, its date, the sender address, the reply-to address, the list of recipients taken from the message notifications, and the message body.
• The report uses a dedicated A4 portrait paper format named "Mail Message" with its own margins and header spacing.
• The report is defined on the mail.message model and is named "Message"; the printed file is named after the message display name.
• The document is rendered in the language of the message author when that language is set.

The module depends on the mail and contacts applications. It does not add new menus or new database models; it only extends the existing chatter behaviour and adds one report.