This fixes an issue where calendar views did not correctly handle selection fields when they were used to determine event colors. Users should now see calendar items colored consistently according to the configured selection value, improving readability and reducing confusion.

- Task: https://www.odoo.com/web#id=8411&view_type=form&model=project.task
- Pad: https://pad.odoo.com/p/r.PvjYdFX70QJTQioP