victornpb/undiscord — reverse-engineered prompt

Build me a simple browser userscript called Undiscord that works on Discord in the browser, not the desktop app. I want it to add a small trash can button in the top right when I open a server channel or DM. When I click it, it should open a simple panel that helps me fill in my author ID, server ID, and channel ID, then start bulk deleting my messages from that conversation as quickly as possible.

Make it easy to install in common userscript managers like Tampermonkey, Violentmonkey, or Greasemonkey, and keep the main script ready to publish as a single user.js file. Please include a clear warning that automating Discord actions can risk account termination, and never ask users to share their auth token. If there are browser compatibility quirks, prefer what works best today, and look up current docs online if you need to.