add gradio demo app

app.py

@@ -0,0 +1,10 @@
+"""Hugging Face Space entrypoint (Gradio expects app.py at repo root)."""
+
+from __future__ import annotations
+
+from unplug_tiny_demo import build_demo
+
+demo = build_demo()
+
+if __name__ == "__main__":
+    demo.launch()