When an individual contact is linked to a company but has no company image set, the contact card now shows a company-style placeholder instead of a generic camera icon. This makes company-related contacts easier to recognize visually and improves consistency in the contact overview.

taskid: 2491161

Description of the issue/feature this PR addresses:

Current behavior before PR:

Desired behavior after PR is merged:




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The mail app now handles thread viewer updates through each related model rather than relying on many shared dependencies. This makes the thread viewing experience easier to maintain and adapt across different areas of Odoo, with minimal direct impact on end users.

Instead of thread viewer having many dependencies, this allows models "having
the thread viewer feature" to keep their own logic for themselves.

The "create or update" part has to be done manually in this case (as opposed to
using "insert") because thread viewer has no clear identifying data, since it
would depend on which model is using it in the first place.

This update supports faster setup of core system components by making some internal field behavior explicit. It helps improve reliability during system startup and module loading, with no expected day-to-day workflow changes for users.

Companion of https://github.com/odoo/odoo/pull/69924.

The Helpdesk stage form now aligns its legend fields more consistently, matching the layout used in project stages. This makes the configuration screen cleaner and easier for users to read without changing any underlying helpdesk behavior.

Currently, in the helpdesk stages legend_* fields are not properly aligned.

so in this commit, align the legend fields on helpdesk stage same as aligned in the project stages.

TaskID: 2508642