vanloctech/youwee ? reverse-engineered prompt

Build me a beautiful cross platform desktop app for downloading videos from YouTube, TikTok, Instagram, Facebook, Bilibili, and other supported sites. I want it to feel fast and simple, with a clean library view, queues, batch downloads, playlist support, and easy controls for video quality, audio only, subtitles, and trimming a clip by time range.

Please also add a way to fetch video info without downloading, manage downloaded files, and automatically add metadata, thumbnails, and subtitles when possible. If you can, include AI features too, like summarizing a video and letting me do basic edits with natural language, like cut, convert, resize, or extract audio.

I’d love a few nice themes, support for browser extension sending links into the app, and a polished settings area for download options, post processing, and AI providers. Make it work well on Windows, macOS, and Linux, and look up current docs online if you need to.