I need a developer who knows their way around Kimai’s Symfony/PHP code-base to extend my current installation with concrete capabilities: • Advanced user-permission controls: I need to a project manager role to Kimai. The project manager can approve only the tasks which belong to their projects as 1st level of approval , and then when all projects tasks which belong to the project managers are approved the team leader can start to approve the whole week as 2nd level of approval, also when employee submit the timesheet for a certain week this timesheet week should be locked, and in case of rejections the lock should be released for rework. Please build this as a clean plugin , include clear patch notes so I can re-apply them after updates. Unit tests or a quick demo instance showing both features in action will be the acceptance criteria.