shatakshi-1404/mealmind ? reverse-engineered prompt

Build me a full stack meal planning app called MealMind.

I want users to be able to sign up and log in securely, then manage a pantry by adding ingredients with things like category, quantity, and expiry date. The app should use the ingredients they already have to suggest 3 recipe ideas with AI, and for each recipe show what missing ingredients they would need to buy. It should also let users log meals with calories and meal type, then show a simple daily calorie tracker and dashboard with stats like pantry items, meals logged, and calories for today.

Make it feel clean and easy to use, with separate pages for the dashboard, pantry, recipes, and meal log. Use a modern React frontend and a Node and Express backend with MongoDB for storage. Please include authentication, protected pages, and the basic API routes for auth, ingredients, recipes, and meals. If you need to check current docs for anything, feel free to look them up online.