yaser01/mkv-muxing-batch-gui ? reverse-engineered prompt

Build me a desktop app for batch muxing video files with subtitles, audio tracks, chapters, and attachments.

I want a simple GUI where I can load a bunch of videos, then add matching or different subtitle and audio files, reorder them, and choose which ones get added to which video. It should let me set things like language, track name, delay, default, forced, and where each track goes in the output. I also want options to keep or remove old subtitles and audio, change existing track settings, and add chapters or attachments too. Please make it easy to use for someone who just wants to organize files and export clean MKV outputs without having to touch the command line.

Support common video, subtitle, audio, and chapter formats, and make it remember my usual folders and settings. If it helps, look up current mkvtoolnix docs online while building it.