sowaan/task_tracker ? reverse-engineered prompt

Build me a Frappe app called Task Tracker that helps a team track tasks and manage timesheets in one place.

I want a simple setup page, a dashboard that shows whether someone is working, not working, or working but not productive, and a way for a desktop app to send heartbeat updates into SowaanERP so timesheets can be created and managed automatically. The app should feel clean and easy to use, with the main screens already in place for task tracker settings and the timesheet dashboard.

If anything needs current docs or best practices, look them up online and follow them. Make sure it runs well in a standard Frappe bench setup and include whatever backend and frontend pieces are needed so I can install it on a site and start using it right away.