armanlife/arman-vpn-client ? reverse-engineered prompt

Build me a simple open source VPN client that works on Android, Windows, macOS, and Linux, using a Firefox account to connect. I want the app to feel easy enough for a normal person to use, with a clean home screen, sign in, a way to pick a country or let it choose the best server, and clear connect and disconnect controls.

It should support split tunneling so I can choose apps and sites that skip the VPN, encrypted DNS, and handle blocked networks as well as possible. Please include a lightweight web panel for Linux server use, plus a terminal based management menu, logs, status, updates, and basic setup and uninstall flow.

Make the interface support light and dark themes, a few languages, and Android TV remote friendly controls. If you need current implementation details, look up the latest docs online before coding.