The app creator in Studio now uses a border color that contrasts with its background. This makes controls such as checkboxes and section borders visible again, reducing confusion when creating new apps.

Before this commit :
when creating an app using the studio, none of the borders were visible, including the checkboxes in the app creator, because the background color of the app creator and the border color were the same.

After this commit:
the border color for the app creator has been changed to make it visible.

task-5138669

Forward-Port-Of: odoo/enterprise#97454

The WhatsApp discussion participant list was reorganized behind the scenes to use a newer shared component approach. This should make the messaging interface easier to maintain and support future improvements without changing day-to-day user workflows.