cobanov/autocut ? reverse-engineered prompt

Build me a desktop app where I can drop in a video and it automatically finds the quiet parts, cuts them out, and gives me a clean edit I can preview right away.

I want the timeline to show spoken parts and silent parts clearly, and I should be able to tweak the cut settings like how sensitive it is, how much padding to keep, and minimum silence or speech lengths. The app should keep everything local on my computer, not upload anything, and it should export either a finished MP4 or an FCPXML file that opens nicely in DaVinci Resolve or Premiere without breaking links. If possible, support multiple linked tracks too, so a second camera or separate audio recording stays in sync and gets cut the same way. Make the preview match the export as closely as possible, and keep the whole thing simple enough that I can just open it, drop a file in, and get a usable result.