Add shim src/streamlit_app.py so HF Spaces entrypoint src/streamlit_app.py works

src/streamlit_app.py

@@ -0,0 +1,32 @@
+# src/streamlit_app.py
+"""
+Small shim for Hugging Face Spaces compatibility.
+
+Some Spaces start Streamlit with `streamlit run src/streamlit_app.py`.
+If that happens, this shim forwards execution to the real launcher
+at the repository root (streamlit_app.py), which in turn runs src/app.py.
+"""
+from pathlib import Path
+import runpy
+import sys
+import os
+
+ROOT = Path(__file__).parent.parent.resolve()
+
+# Diagnostic print so we can see in HF container logs
+print("shim: running src/streamlit_app.py -> delegating to ../streamlit_app.py")
+sys.stdout.flush()
+
+# If root streamlit_app.py exists, run it; otherwise directly run src/app.py as fallback
+root_launcher = ROOT.joinpath("streamlit_app.py")
+if root_launcher.exists():
+    runpy.run_path(str(root_launcher), run_name="__main__")
+else:
+    # fallback: directly run the app (useful for local sanity checks)
+    app_script = ROOT.joinpath("src", "app.py")
+    if not app_script.exists():
+        raise FileNotFoundError(f"Neither {root_launcher} nor {app_script} exist")
+    # set a little diagnostic in the logs
+    print("shim: root launcher missing — running src/app.py directly")
+    sys.stdout.flush()
+    runpy.run_path(str(app_script), run_name="__main__")