harveyai/deep-research-starter ? reverse-engineered prompt

Build me a simple Streamlit app for trying out the OpenAI Deep Research API.

I want a clean interface where I can enter a research question, run it, and watch the results come back in the app. It should feel like a starter project for experimenting, not a full product, so keep it easy to understand and easy to extend. Include a place to view the raw streaming events too, since I want to inspect what the API is returning while it runs. If it helps, use the sample outputs in the repo as a guide for the event display.

Make sure the app is runnable locally with the existing Python setup, and keep the code straightforward. If you need to check anything about the current API or best way to use it, look up the latest docs online. I’d also like the UI to be polished enough that someone can paste in a prompt and immediately see the research workflow working end to end.