Build a web app that cleans up product photos for online sellers. 1. Accept a batch upload of phone-shot product photos (drag and drop, up to 20 at a time). 2. Offer background replacement with 12 studio presets (pure white, seamless gray, wood, marble, lifestyle kitchen, and seasonal sets) plus a custom prompt field. 3. Add automatic lighting cleanup: exposure, color cast, and shadow softening, applied before background work. 4. Keep an original-vs-result slider on every image so sellers can verify the product itself was not distorted. 5. Export at marketplace-ready sizes in one click: Amazon (2000px pure white), Etsy (2000px square), Shopify, and Instagram square. 6. Save a brand kit per account: preferred backgrounds and a consistent style prompt, so the product line looks coherent. 7. Add a batch-apply action that pushes one background choice across the whole upload. 8. Flag images where the product edge looks risky and suggest a manual review. 9. Charge with a metered plan: free tier of a few generations, then per-image credits.