sindresorhus/caprine ? reverse-engineered prompt

Build me a polished desktop app for Facebook Messenger that feels clean and native on Mac, Windows, and Linux.

I want it to open Messenger in its own window, with a dark mode, a compact layout when the window is small, keyboard shortcuts for switching chats, and a few privacy focused options like hiding names and avatars, blocking read receipts and typing indicators, and keeping Facebook from tracking links I click. It should also support desktop notifications, an option to hide message previews, and a way to mute notifications quickly. On macOS, add nice touches like vibrancy, menu bar mode, Touch Bar support, and respect Do Not Disturb.

Make it easy to customize the look a bit, like text size and styles, and keep it feeling fast and simple. If you need to check current docs or platform behavior while building it, go ahead and look it up online.