OpenSelena/omniget ? reverse-engineered prompt

Build me a free desktop app called OmniGet for Windows, macOS, and Linux that lets people paste a link and quickly download videos, music, courses, PDFs, images, torrents, and other media from a huge range of sites. I want it to feel simple for non technical users, with one main box for links, a preview of what was found, quality choices when available, and an easy download queue with resume and retry.

It should also handle things like YouTube, Udemy, Hotmart, Instagram, X, Pinterest, TikTok, Telegram, and other supported sites, and use browser cookies when needed so logged in content can work. After downloading, the app should let users play, read, transcribe, convert, and manage what they saved, with a clean modern interface and no terminal needed. If you need to check current docs for any integrations, look them up online.