This update simplifies how the enterprise mail form layout handles the chatter area by moving shared logic into the common codebase. The change reduces duplicated customization and should make future maintenance safer without changing day-to-day user workflows.

The invoice document scanning flow now shows more specific error messages when OCR processing fails, such as unsupported image sizes, missing page counts, or PDF conversion problems. This helps users and support teams understand what went wrong and take the right next step faster.

- Added new errors messages to be displayed in the client coming from the OCR

This update strengthens automated checks across Helpdesk workflows, including ticket assignment, portal closure, live chat commands, ratings, service-level policies, field service tasks, and related sales, repair, stock, and accounting actions. It helps reduce the risk of regressions in customer support processes without changing end-user functionality directly.

The mail enterprise form code was reorganized so related sections are grouped and ordered more logically. This is an internal cleanup that makes future maintenance easier without changing user-facing behavior.

Overridden methods from Form view are separated from custom mail methods, and
are sorted according to their call in the lifecycle.

This will make it easier to understand the file, in preparation to clean it
further.

Part of task-2871070

When supplier invoices are processed with the “Single line per tax” option, line descriptions now use a generic supplier-and-date format instead of detailed extracted text. This keeps invoice summaries focused on the amounts and taxes, which is what users of this option typically need.

When the option "Single line per tax" is activated, it will now use
the generic "Supplier - date" description.
This is done as most users of that option don't actually care about the
description of the lines, only the amounts and taxes matter.

Task #2858632