contaminative-republication958/walletgen ? reverse-engineered prompt

Build me a simple Windows app that helps me recover access to my own Bitcoin and Ethereum wallets by generating and checking seed phrases locally on my computer.

I want it to feel fast, with a clean interface, a progress bar, and clear options for Bitcoin or Ethereum. It should let me try either random seed phrases or a custom word list, and it should use multiple threads so it runs quickly on a normal PC. If it finds a match, show the seed phrase and private key clearly so I can save it right away.

Keep everything local, don’t send anything to a server, and make it easy to run on a private machine. If you need current setup details or library docs, look them up online and use the best current approach.