MathPractice

docs: update README.md to detail My Pet Room, Grand Trophy Display Shelf, Restart Challenge button, and starter history features

fix: ensure My Pet Room view renders correctly and seed initial starter history data

feat: convert My Trophy Room to My Pet Room, displaying the pet in a cozy living area alongside a Grand Trophy Display Shelf

feat: add a Restart Challenge button to allow re-playing today's challenge with fresh questions

feat: add a customizable Trophy Shelf inside the Pet Arena to celebrate completed daily challenges