davidamunga/pesacast ? reverse-engineered prompt

Build me a working app that mirrors M PESA SMS transactions from an Android phone to a desktop app in real time over Bluetooth. I want the Android side to catch incoming M PESA messages, turn them into clean transaction details like amount, sender or recipient, reference code, time, and balance, then keep sending them live in the background. The desktop app should connect automatically, show a live feed of transactions, and pop desktop notifications when new ones come in.

Make it feel polished and easy to use, with a simple way to start the mirror service on Android and see the desktop app scanning and connecting. If you need to check current docs for Android, Tauri, or Bluetooth APIs, look them up online. Keep the setup straightforward and make sure it works well on a normal phone and desktop without extra fuss.