Bug: Streamlit Components Fail in IDX

Summary: Custom Streamlit components consistently fail to load in Project IDX, even w/ ngrok. Error: "app.[comp] from [ngrok_url] hasn't received Streamlit.setComponentReady()." Suggests IDX bug.

To Reproduce: 1. IDX. 2. Basic Streamlit (app.py) + React/Webpack component (frontend/). 3. Simple React comp: Streamlit.setComponentReady() on mount. 4. package.json: webpack serve, Webpack: streamlit external. 5. ngrok.yml: ports 3001, 8501. 6. devserver.sh: ngrok, URLs, start Streamlit. 7. ./build.sh. 8. Start: npm start, ngrok start --all, ./devserver.sh. 9. Access Streamlit.

Expected: Component loads.

Actual: Component fails. Error: "app.[comp] from [ngrok_url] hasn't received Streamlit.setComponentReady()."

Troubleshooting: 1. Minified comp. 2. Verified Streamlit.setComponentReady(). 3. Correct Webpack. 4. ngrok used. 5. Browsers. 6. No index.html. 7. Cleaned env. 8. Dev/prod. 9. Restarts.

Probable Cause: IDX's handling of component requests, even w/ ngrok. Internal proxy issue.

Impact: Impossible to dev/test Streamlit components in IDX.

Request: Investigate.

Code: Code in the env.

Info: Exhaustive troubleshooting done. Problem is in IDX.