Payroll screens and workflows have been refined to make everyday payroll management easier and clearer for users. The update also standardizes payroll accounting setup by requiring a journal on payroll structures, helping reduce setup mistakes.

This commit aims to improve the usability of payroll with various modifications on views and behaviors.

taskID 2783013

VoIP phone system configuration is now handled directly within the VoIP area instead of a separate setup component. This simplifies maintenance and helps ensure users receive the right calling configuration when messaging starts.

Model and move the PBX configuration to the Voip model.

Part of task-2804807.
Community:  https://github.com/odoo/odoo/pull/94569
Upgrade: https://github.com/odoo/upgrade/pull/3625

Contract addendums now use the salary and benefit details linked to an employee's new job position when their function changes. This prevents outdated contract information from carrying over and makes payroll contract templates easier to use.

When an addendum to an existing contract is made with a changes of function,
the addendum will take details from the new function
(through the default contract of the new job position).
Previously, the details didn't change and were based on the current
contract details.

taskID 2783059 [Payroll] Addendum to contract doesn't take good values