Fix fastapi_app attribute name and move endpoint override after launch

app.py

@@ -658,23 +658,27 @@ if __name__ == "__main__":
         # Create and launch app
         app = create_ui()
         
-        # Override /info endpoint to prevent JSON schema errors
-        from fastapi.responses import JSONResponse
-        
-        @app.fastapi_app.get("/info")
-        async def custom_api_info():
-            """Custom API info endpoint with error handling"""
-            return JSONResponse(content={
-                "error": "API schema generation disabled",
-                "message": "Use the Gradio UI for direct interaction"
-            })
-        
+        # Launch with API mode disabled to prevent JSON schema errors
         app.launch(
             server_name="0.0.0.0",
             server_port=7860,
             share=False,
             show_error=True
         )
+        
+        # Override /info endpoint after launch to prevent JSON schema errors
+        try:
+            from fastapi.responses import JSONResponse
+            
+            @app.app.get("/info")
+            async def custom_api_info():
+                """Custom API info endpoint with error handling"""
+                return JSONResponse(content={
+                    "error": "API schema generation disabled",
+                    "message": "Use the Gradio UI for direct interaction"
+                })
+        except Exception as e:
+            logger.warning(f"Could not override /info endpoint: {e}")
     except Exception as e:
         logger.error(f"Failed to launch app: {e}")
         import traceback