FantomStudy/trade-by-yourself — reverse-engineered prompt

Build me a simple web app called Trade By Yourself using this existing Next.js project. I want it to feel like a personal trading journal for someone managing their own trades, not a complicated broker platform.

The main page should let me add a trade with basic details like symbol, buy or sell, entry price, exit price, quantity, date, and notes. Show the saved trades in a clean table and include a small dashboard with total profit or loss, win rate, number of trades, and recent activity. Make it look modern, calm, and easy to use on desktop and mobile.

If there’s no backend already set up, use local storage for now so the app works right away. Add empty states and simple validation so it doesn’t feel broken. Keep the code clean and organized in the current project structure. Look up current Next.js docs online if you need to.