sag-har/Multimodal-Lie-Detection-System ? reverse-engineered prompt

Build me a simple app for detecting whether someone is being truthful or deceptive using multiple signals at once.

I want a frontend where a user can upload or record a short video, audio, and EEG data, then see a clear result showing truth or deception along with a confidence score. The app should also show a few easy to understand visual summaries, like facial expression tracking, audio based cues, and EEG frequency band patterns, so the result does not feel like a black box.

Please set it up with a working backend that can handle the analysis and return predictions to the frontend. Make the experience clean and easy to use, with a straightforward upload or record flow and a results screen that explains what was found. If you need to look up current docs or best practices for any part of it, go ahead and do that.