Disable Gradio API docs to fix schema parsing crash

The /api/ endpoint was trying to serialize ConversationManager
state and crashing on additionalProperties. Disabling show_api
skips this problematic endpoint.

app.py

@@ -23,5 +23,6 @@ if __name__ == "__main__":
         server_name="0.0.0.0",
         server_port=7860,
         share=False,
-        show_error=True
+        show_error=True,
+        show_api=False  # Disable API docs to avoid schema parsing bug
     )

ui/app.py

@@ -538,5 +538,6 @@ if __name__ == "__main__":
         server_name="0.0.0.0",  # Allow external connections for HF Spaces
         server_port=7860,
         share=False,
-        show_error=True
+        show_error=True,
+        show_api=False  # Disable API docs to avoid schema parsing bug
     )