shrimqy/sefirah ? reverse-engineered prompt

Build me a Windows and Android companion app that works like a simple alternative to Phone Link and KDE Connect.

I want it to let my phone and PC stay in sync over the same network, so I can share clipboard text and images, get my Android notifications on my desktop, send files back and forth, and control media on my PC from my phone. It should also let me see and reply to SMS messages, view and answer calls, and mirror my Android screen from the desktop when I need it.

Please make it feel modern and polished, with clear setup steps, device pairing, and easy to find settings. It should work well on Windows 11, and be usable on Android too. If there are tricky permission or connection details, handle them cleanly and explain them in the app. If you need to check current docs for anything like screen mirroring or permissions, go ahead and look them up online.