ESP32 Pomodoro Timer (NeoPixel Ring + Button + Buzzer)

A glowing desk timer that keeps you off your phone while you study! The **24-LED NeoPixel ring** shows the time left like a clock face: work is **red**, short breaks are **green** and the long break after every four sessions is **blue**. In the last 5 seconds the ring flashes and the **passive buzzer** ticks, then a rainbow celebrates the finished phase. One **button** starts, pauses and resets, all on an **ESP32** without a single `delay()`.