add app.py for hf space

app.py

@@ -0,0 +1,25 @@
+import os
+import sys
+from pathlib import Path
+
+# Ensure 'src' directory is importable so we can reuse the existing Gradio app
+ROOT = Path(__file__).resolve().parent
+SRC = ROOT / "src"
+if str(SRC) not in sys.path:
+    sys.path.insert(0, str(SRC))
+
+# Import the existing Gradio Blocks demo from src/sharp/web/app.py
+from sharp.web.app import demo as _demo  # type: ignore
+
+# Expose both names for Hugging Face Spaces compatibility
+demo = _demo
+app = _demo
+
+if __name__ == "__main__":
+    # On Spaces, the platform handles networking; this is for local testing
+    port_env = os.getenv("PORT", "7860")
+    try:
+        port = int(port_env)
+    except ValueError:
+        port = 7860
+    demo.launch(server_name="0.0.0.0", server_port=port)