Varun-Realify/shopify-meta-ads-analytics-engine ? reverse-engineered prompt

Build me a business intelligence dashboard for an ecommerce store that connects Shopify, Meta Ads, and Google Merchant Center so I can see the real impact of my marketing in one place.

I want a FastAPI backend with a simple React dashboard that shows store revenue, ad spend, ROAS, profit, sales lift, and campaign performance in clean charts and tables. It should pull live data from Shopify and Meta Ads, and also compare product prices against Google Merchant benchmarks so I can spot items that are priced too high or too low. Please include a way to track competitor Shopify stores too, so I can compare things like catalog size, average price, discounts, categories, and best sellers.

Make it feel like a real analytics product, with a polished dashboard, useful insights, and clear recommendations. If you need to check current API docs or best practices for the integrations, look them up online as you go.