note-quiz

Implement or review Note Quiz anonymous scoring and country leaderboard changes involving score formulas, session eligibility, payload validation, `/api/leaderboard`, Supabase tables or RPCs, duplicate prevention, retention, ranking displays, privacy disclosures, or related analytics. Use whenever a change affects how practice results become country points.

Implement or review Note Quiz practice experience changes involving `/practice`, sight-reading or ear-training sessions, Zustand lifecycle state, timers, music input, audio or microphone behavior, responsive UI, translations, or practice analytics. Use when a task changes what a learner sees or does during a practice session.