Admins add employees, employees submit

Admins add employees, employees submit PTO requests, and each request appears in an inbox and notifies the assigned manager. Managers approve or deny in the app or through secure one-time approval links sent by email, the decision is recorded, and the employee is notified. A calendar shows who is off and when, and the app tracks simple PTO balances, conflict warnings against departments, blackout dates, and holidays, minimum-notice rules, settings, and CSV reports. It is deliberately scoped to stay a simple approval tool rather than a full HR platform.