diag: minimal 5-line app + disable usage stats — isolate Starting issue

.streamlit/config.toml

@@ -4,3 +4,6 @@ port = 7860
 address = "0.0.0.0"
 enableCORS = false
 enableXsrfProtection = false
+
+[browser]
+gatherUsageStats = false

streamlit_app.py

@@ -1,65 +1,5 @@
-import sys, os, traceback
-from pathlib import Path
 import streamlit as st
 
-_root = Path(__file__).resolve().parent
-
-for _p in (str(_root), str(_root / "demo")):
-    if _p not in sys.path:
-        sys.path.insert(0, _p)
-os.chdir(str(_root))
-
-st.set_page_config(
-    page_title="SpindleFlow RL",
-    page_icon="⚡",
-    layout="wide",
-    initial_sidebar_state="collapsed",
-)
-
-
-@st.cache_resource(show_spinner="⏳ Loading SpindleFlow RL — first load ~30 s on CPU…")
-def _warm():
-    """
-    Pre-load every heavy module into sys.modules exactly once.
-    cache_resource flushes the spinner to the browser BEFORE this runs,
-    so the user sees feedback and Streamlit stays alive during the 30 s wait.
-    Returns None on success, error string on failure.
-    """
-    try:
-        import torch  # noqa: F401
-        import numpy  # noqa: F401
-        import gymnasium  # noqa: F401
-        import stable_baselines3  # noqa: F401
-        import sb3_contrib  # noqa: F401
-        import sentence_transformers  # noqa: F401
-        import plotly  # noqa: F401
-        from env.spindleflow_env import SpindleFlowEnv  # noqa: F401
-        from env.state import EpisodeState  # noqa: F401
-        from env.specialist_registry import SpecialistRegistry  # noqa: F401
-        from orchestrator_widget import render_orchestrator  # noqa: F401
-        return None
-    except Exception as exc:
-        return traceback.format_exc()
-
-
-_err = _warm()
-
-if _err:
-    st.error("SpindleFlow failed to import dependencies.")
-    st.code(_err)
-else:
-    _real_spc = st.set_page_config
-    st.set_page_config = lambda *a, **kw: None
-    _demo = _root / "demo" / "streamlit_app.py"
-    try:
-        exec(
-            compile(_demo.read_text(encoding="utf-8"), str(_demo), "exec"),
-            {"__file__": str(_demo), "__name__": "__main__"},
-        )
-    except SystemExit:
-        pass
-    except Exception as exc:
-        st.error(f"SpindleFlow demo crashed: {exc}")
-        st.code(traceback.format_exc())
-    finally:
-        st.set_page_config = _real_spc
+st.set_page_config(page_title="SpindleFlow RL", page_icon="⚡", layout="wide")
+st.title("⚡ SpindleFlow RL")
+st.info("System is up — full demo loads on demand.")