vantixt777/doxbean ? reverse-engineered prompt

Build me a desktop app in Python that acts like a simulated HTTP load testing tool with a clean terminal style GUI. I want to be able to enter a target URL, choose how many requests to send, pick between three modes, one slow and sequential, one threaded, and one more aggressive burst mode, then start the run and watch a live log with a progress bar.

It should also have an optional proxy mode that can fetch public proxies automatically, plus basic validation so bad URLs or request counts are caught before starting. Add an Abort button so I can stop the run safely at any time. Keep it simple to run from one main Python file, and make the interface look polished and easy to use.

If you need to look up current PyQt5 or requests docs online, feel free to do that.