ykw815/ScreenRecorder — reverse-engineered prompt

Build me a simple browser screen recorder app called ScreenRecorder.

I want a clean page where someone can choose to record their screen, and if possible include microphone or system audio, then start, pause, resume, and stop the recording. After stopping, show a preview of what was captured and let the user download the video file easily. It should feel straightforward for a normal person, with clear buttons and basic status info like whether it is recording and how long it has been running.

Please make it work well in modern browsers and handle the common permission or unsupported browser cases without feeling broken. If there are browser limits around audio or screen capture, explain them in the UI in plain language. Keep the design simple and polished, and wire up whatever frontend code is needed so the app is ready to run locally. If you need details on current browser screen capture behavior, look up the latest docs online.