The Mail app's online status icon logic was reorganized so the display rules live in the underlying data model rather than the screen component. This makes the feature easier to maintain and reduces the risk of inconsistent behavior in places where status icons appear.

+ Turn props on component into fields on PersonImStatusIconView model
+ Move handler from component methods to model record methods

Task-3004188.

The mass mailing composer now hides the mailing name option when the selected records cannot actually create a mailing. This prevents users from thinking a mailing campaign will be created when the system would only send a regular mass email.

## Issue

Currently when creating a composer in mass mode
the composer always shows the 'mass mailing name' option even when a mailing cannot be created.

This silently creates a regular mass mail.

## Fix

This hides that option when selecting records of models that do not inherit from thread. So that users do not falsly believe a mailing will be created.

task #2990447


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The mail activity interface was updated to use a newer internal component structure. This helps keep the messaging area easier to maintain and supports future improvements without changing day-to-day user workflows.

part of task-2783065

Enterprise PR: https://github.com/odoo/enterprise/pull/32360

The mail activity completion popover was updated as part of an internal modernization effort. This helps keep the interface maintainable and consistent without changing the user-facing workflow.

part of task-2783065

The messaging discussion area has been updated to use a newer internal component structure. This helps keep the mail app easier to maintain and prepares it for future improvements, with no expected change to day-to-day user behavior.

part of task-2783065

The Mail app’s attachment preview component was updated to use the newer interface used across Odoo. This keeps attachment viewing aligned with the current platform behavior and removes obsolete event handling that was no longer used.

Since
https://github.com/odoo/enterprise/commit/afcdd1878a2eaf4cbca85d1169dea31a108c8c43#diff-f064a21c91b8daa5d78c44e88e2c02345ff0a7230403dd3600a65d3a6b0653d3L18 there is no listener for preview_attachment_validation.

Part of task-2783065

This update improves internal error messages when configuring mail-related data fields. It helps developers identify incorrect field definitions faster, reducing troubleshooting time and improving reliability for future mail features.

The test mock server used by messaging and related apps has been reorganized into separate pieces by business object and web controller. This makes the test infrastructure easier for developers to navigate and maintain, reducing the effort and risk when updating these areas in the future.

The mail mock server is getting bigger and bigger. As a consequence,
navigating/keeping it up to date is quiet inconvenient.

This commit solves this issue by splitting it by model/controller.

enterprise: https://github.com/odoo/enterprise/pull/32314

The call options menu in Odoo's mail and Discuss area was updated to use the newer interface framework. This helps keep the calling experience easier to maintain and supports future improvements without changing day-to-day behavior for users.

part of task-2783065

The test mock server setup was reorganized into smaller parts by business area and function. This makes the internal test code easier for developers to navigate and update, reducing maintenance effort without changing customer-facing behavior.

*: approvals, documents, voip, website_helpdesk_livechat.

The mail mock server is getting bigger and bigger. As a consequence, navigating/keeping it up to date is quiet inconvenient.

This commit solves this issue by splitting it by model/controller.

community: https://github.com/odoo/odoo/pull/98374

This update removes an unnecessary internal check in the VoIP activity view. It streamlines the code without changing the user experience, helping keep the VoIP module easier to maintain.

part of task-2783065