Update app.py

app.py

@@ -19,10 +19,18 @@ if not HF_TOKEN:
 
 # Initialize backend client
 try:
-    backend_client = Client(BACKEND_URL, hf_token=HF_TOKEN)
+    # For private Spaces, pass token via headers or use HF_TOKEN environment variable
+    # Gradio Client automatically uses HF_TOKEN env var if available
+    if HF_TOKEN:
+        # Set as environment variable for gradio-client to pick up
+        os.environ["HF_TOKEN"] = HF_TOKEN
+        backend_client = Client(BACKEND_URL)
+    else:
+        backend_client = Client(BACKEND_URL)
     print(f"Connected to backend at {BACKEND_URL}")
 except Exception as e:
     print(f"Warning: Could not connect to backend: {e}")
+    print(f"Make sure BACKEND_URL and HF_TOKEN are set correctly.")
     backend_client = None
 
 def add_sentences_ui(sentences_text):
@@ -238,5 +246,7 @@ with gr.Blocks(title="RAM-P - Interactive Learning") as frontend_app:
     """)
 
 if __name__ == "__main__":
-    frontend_app.launch(server_name="0.0.0.0", server_port=7861)
+    # Let Gradio use default port (7860) or GRADIO_SERVER_PORT env var
+    # Don't hardcode port - let Hugging Face Spaces handle it
+    frontend_app.launch()