Fix chat message format to be compatible with Gradio 4.19.2

src/app.py

@@ -27,17 +27,15 @@ class DryingApp:
             # Get response from agent
             messages, processed_image = self.agent.process_message(message, image)
             
-            # Update history with proper message format
+            # Update history with proper message format for Gradio 4.19.2
             if not history:
                 history = []
                 
             # Safely extract the assistant's response
             assistant_response = messages[1]["content"] if len(messages) > 1 else "I apologize, but I couldn't process your message."
             
-            history.extend([
-                {"role": "user", "content": message},
-                {"role": "assistant", "content": assistant_response}
-            ])
+            # Format as tuples (user_message, assistant_message) for Gradio 4.19.2 compatibility
+            history.append((message, assistant_response))
             
             return history, processed_image
         except Exception as e: