"""Source entry point used by Docker and local `python server.py` runs.

Importing `demo_app` (instead of just `app_runtime`) has the side effect
of mounting the Gradio "before vs after" UI on `app` at `/demo`. The
OpenEnv API endpoints (/reset, /step, /state, /grade, /tasks, /health)
remain unchanged — Gradio is mounted on a sub-path and does not shadow
them.
"""

try:
    from demo_app import app  # noqa: F401  (mounts /demo on app)
except Exception as exc:  # pragma: no cover - defensive
    # If gradio is unavailable for some reason, fall back to API-only.
    import logging
    logging.getLogger(__name__).warning(
        "demo_app import failed (%s); serving API only without /demo", exc
    )
    from app_runtime import app  # noqa: F401

from app_runtime import main


if __name__ == "__main__":
    main()