UnifoK/RentalRide ? reverse-engineered prompt

Build me a fleet management web app for a rental company that lets admins, employees, and customers log in and see only what they should.

I want to manage vehicles, employees, customers, and rental bookings in one place. Admins should be able to add, edit, and remove vehicles and staff, while employees can handle bookings and track rental time and cost. Customers should be able to view their booking history and current rentals. Please make it a clean Spring Boot site with simple pages, forms, and a basic dashboard feel, and include REST endpoints too so it can connect to a mobile app later.

Use a MySQL or H2 database, keep the code organized, and make the UI look decent with Bootstrap and Thymeleaf. If you need to check current Spring Boot or library docs online, go ahead and do that.