thepranaygupta/khaata ? reverse-engineered prompt

Build me a trading journal web app for Indian retail traders called खाता Khaata.

I want users to be able to sign in with email, upload .xlsx trade exports from brokers like INDmoney, Groww, Zerodha, or Motilal Oswal, and have the app automatically read the transactions, match buys and sells using FIFO, and show any open trades left over. After import, users should be able to review the matched trades before saving them.

The app should also have a dashboard with key performance numbers, monthly and cumulative profit and loss charts, a calendar heatmap for daily results, and a journal page where trades can be sorted, filtered, edited inline, and exported. Add an insights area with things like risk of ruin, Kelly style position sizing, and day of week performance, plus a goal setting and scenario simulator page for improving consistency.

Make it dark mode first, polished, and friendly for Indian users, with INR formatting and Indian date styles. If needed, look up any current docs online while building it.