ataraxia-ashish/Health-AI-Assistant ? reverse-engineered prompt

Build me a simple health companion web app called HealthAI that helps everyday people get quick guidance without visiting a doctor first. I want a clean homepage, a place to sign up and log in, and an AI chat screen where users can type symptoms or health questions and get friendly, easy to understand advice. It should also let users choose a condition and see a symptom based recommendation flow, then generate a health report from what they entered and saved before. Add a step tracker that connects to Google Fit so users can see their daily steps. Keep the data private for each user, and make sure login is secure. Use a straightforward HTML, CSS, and JavaScript front end with a Node and Express backend, MongoDB for storage, and connect the AI chat to Gemini. If you need to check current API details, look them up online first.