PrioxisTechnologies/FitnessApp ? reverse-engineered prompt

Build me a polished Flutter fitness workout app template that feels like a real product, with a clean Material style and a modern mobile UI.

It should help people follow preset workout plans for bodybuilding, weight gain, weight loss, and general fitness, and make it easy to track workouts and schedules. I want screens for workout details with step by step exercise instructions, progress charts like pie, line, and progress views, a progress photo gallery, a profile page, and a notifications page. Include custom reusable widgets and keep the code clean and organized so it’s easy to extend later.

Make it look good out of the box, with smooth navigation between screens and a professional fitness app feel. If you need current Flutter guidance or widget ideas, look up the latest docs online.