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app.py

@@ -1,4 +1,5 @@
 import importlib
+import gradio as gr
 
 _module = importlib.import_module('app_claude_41')
 
@@ -17,4 +18,12 @@ if demo is None:
             demo = getattr(_module, factory_name)()
             break
 
-# If the original app is Streamlit, switch SDK to Streamlit in Space settings.
+# Ultimate fallback to avoid uninitialized app in Spaces
+if demo is None:
+    def _fallback_echo(text: str) -> str:
+        return f"Fallback active. Received: {text}"
+
+    demo = gr.Interface(fn=_fallback_echo, inputs=gr.Textbox(label='Input'), outputs=gr.Textbox(label='Output'), title='Fallback Demo')
+
+if __name__ == '__main__':
+    demo.launch()