vigneswaran7373/qeasy-queuemanagement-mern-project ? reverse-engineered prompt

Build me a smart queue management web app where customers can take a digital ticket from their phone, see their place in line, get an estimated wait time, and watch the screen update live until they are called.

I want a staff side where a manager can log in, see the current queue, call the next person, mark someone as done or a no show, open or close a queue, and add new services like different counters or departments. Each service should have its own ticket number prefix, like G 001 or B 014, and the numbers should reset every day without skipping.

Also make a big display page for a TV or lobby screen that shows who is being served right now. The wait time should get smarter over time based on how long service actually takes, and old tickets from previous days should be cleaned up automatically. If needed, look up current docs online and build it in a clean modern MERN setup with a simple working UI.