telegramdesktop/tdesktop ? reverse-engineered prompt

I want to build a desktop messaging app, basically a native client for Telegram. It should let users log into their existing Telegram accounts to have secure, private conversations. The app needs to run on Windows, macOS, and Linux. I'm thinking of a full-featured experience, so it should handle text messages, sending photos and files, stickers, and all the usual chat features. The main thing is that it should be a standalone application that feels fast and reliable, just like the official Telegram Desktop app that people already use. You can look up the official Telegram API docs to make sure it connects correctly and supports all the core functionality. It should look and feel polished.