umalavanya/PulseMarket-ecommerce-MERN-AI-Chatbot ? reverse-engineered prompt

Build me a full ecommerce app where people can browse products, search and filter by category, price, rating, and sort them, then open a product page, add items to cart, and go through checkout with shipping and payment options like cash on delivery, PayPal, or card. I also want user sign up, login, and profile pages with saved sessions, plus order history and order details for logged in users.

Please add a floating AI shopping assistant on every page that can answer questions like finding products, comparing items, and explaining store policies. It should also be able to help with order status, but only if the user is signed in, and if the AI service is unavailable it should still fall back to a simple local recommendation system.

Make it a polished modern responsive app with a nice storefront look, and set up the backend, database models, API routes, and a simple seeder script so I can load sample products and test users quickly.