saadaslamdev/flutter_social_video_downloader ? reverse-engineered prompt

Build me a Flutter app called Social Saver that lets people paste a link from Instagram, YouTube, YouTube Shorts, TikTok, or Facebook and download the video easily. I want a simple home screen with a clean look, light and dark mode, a splash screen, and clear steps for getting the download link, choosing a quality if needed, and showing download progress.

After the download finishes, let the user open the video right away, retry if something fails, and save it into a dedicated app folder or the gallery. Make sure it handles permissions and checks for internet before trying to download. Use Bloc with a clean architecture style, and keep the code organized and easy to maintain. If you need to check current package docs or platform details, go ahead and look them up online.