This update makes work calendars a standard part of company setup so resources consistently have a default schedule. It also cleans up unused calendar-related fields and improves related views and tests, making the system easier to maintain and clearer for users configuring working time.

Task: https://www.odoo.com/web#id=23809&view_type=form&model=project.task&action=333&active_id=248&menu_id=4720

The product margin feature was reorganized to use a dedicated analysis report instead of storing margin calculations directly on product records. Users also get a product form shortcut to open detailed margin analysis, making profitability information easier to review while keeping the underlying feature easier to maintain.

Task : https://www.odoo.com/web#id=20011&view_type=form&model=project.task&menu_id=3942&action=327
Pad : https://pad.odoo.com/p/r.6vTm7HhLsU4uWZCM

Superseding #8209