veryrareuser/gym-tracker ? reverse-engineered prompt

Build me a mobile first workout tracker web app where people can sign up, log in, and save their workouts to the cloud.

I want it to feel simple on a phone, with a clean home screen for recent workouts, an easy way to add exercises, sets, reps, weights, and notes, and a place to view workout history over time. Please make accounts secure, with password login, session handling, logout from other devices, and a way to change passwords. The app should keep local session data tied to the current tab, clear it when the tab closes, and still keep workouts saved online.

Use the existing Supabase setup for storage and auth, and make sure the app respects row level security and only lets each user see their own data. Keep the build lightweight and polished, and make sure it works well in a browser, especially on mobile. If you need current Supabase or Vite details, look them up online first.