This update simplifies how several messaging-related business app components are defined behind the scenes. It reduces repetitive code and prepares these areas for future improvements without changing day-to-day user workflows.

\* = approvals, voip, website_helpdesk_livechat
Task-2695223
See https://github.com/odoo/odoo/pull/79259

The Project app user experience is clearer with outdated closed-status references removed and planning labels updated. Users now see planned hours described consistently, reducing confusion when reviewing projects, tasks, and field service work.

Purpose of this commit to improve generic UX for the project app.

So, In this commit done following changes:

- remove 'is_closed' references.
- change stat button string 'hours Forecast' to 'hours Planned' in
project and task form view.

task-2536044