Abhi-A-S/OpenAudit ? reverse-engineered prompt

Build me a full web app called Open Audit that helps people manage expenses and receipts with AI.

I want users to be able to sign up, log in, and upload receipt files like PDF, JPG, and PNG. After upload, the app should extract the vendor, amount, date, category, item details, and a confidence score, then show the receipt in a dashboard with flags for things like duplicates, missing details, and unusually high amounts. I also want a tax calculator for Indian old and new regimes, with deductions like 80C, HRA, and standard deduction, plus a comparison of tax saved.

Make it feel clean and easy to use, with a simple dashboard, upload page, login and register screens, and an admin view for flagged receipts. Use a modern React frontend and a Node backend with a PostgreSQL database. If you need current docs or APIs for the AI or auth setup, look them up online as you go.