BeyondDimension/SteamTools ? reverse-engineered prompt

I want to build a cross-platform desktop utility for Steam users, something like the "Watt Toolkit" app. It should be a multi-functional toolbox that makes managing Steam easier and more powerful.

The most important feature is an account switcher to let me quickly hop between different Steam, Epic, or Uplay accounts without having to log in and out all the time. It should also include a network acceleration feature to make the Steam store, community pages, and downloads feel faster.

For game management, I want tools to let users idle games to get trading cards without a full install, manage cloud saves, and unlock or re-lock achievements. Also, please build in a local authenticator for 2FA codes, like a desktop version of the Steam Guard mobile app, that can handle batch confirmations for market items.

It needs to run on Windows, macOS, and Linux. You can use C# and Avalonia UI to build the interface.