devanshkorde/EzGrind ? reverse-engineered prompt

Build me a full stack fitness tracker web app called EzGrind that feels clean and easy to use on desktop and mobile. I want users to be able to sign up, log in, reset their password by email, and manage their profile. After login they should see a dashboard with workout streaks, weekly stats, total volume, recent workouts, bodyweight trends, and personal records. They should also be able to log workouts quickly by choosing a muscle group, picking an exercise, entering weight and reps, and seeing the last set prefill automatically. Add a workout history page with filters, an exercise library with search and detail panels, and bodyweight tracking with simple charts. Use Flask on the backend, plain HTML, CSS, and JavaScript on the frontend, and a PostgreSQL database. Keep it simple, no frontend framework, and make sure the app is secure and works as one site with the frontend served by Flask. If you need to look up current docs online, go ahead.