This update introduces a timeline-style view for messages, helping users follow conversations and activity history more clearly. It also updates related mail, HR, and gamification screens so messaging feels more consistent and easier to scan across the system.

- Task: https://www.odoo.com/web/#id=9367&view_type=form&model=project.task
- Pad: https://pad.odoo.com/p/r.R0YWt0jSBGBNI0aU

Adds a clear warning when a user's selected timezone differs from their browser timezone. This helps users spot configuration mismatches that could cause appointments, deadlines, or activity times to appear incorrectly.