Switch to gr.ChatInterface for proper Gradio 6.5 compatibility

- Replaced manual Blocks interface with ChatInterface component
- ChatInterface automatically handles message formatting
- Function now returns just response string (not full history)
- Simplified event handling - ChatInterface manages everything
- Added retry, undo, and clear buttons automatically
- Fixes 'Data incompatible with messages format' error

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app.py

@@ -53,15 +53,16 @@ def chat_with_ceo(message, history):
     Chat function that responds like the CEO
     Args:
         message: User's current message
-        history: List of previous messages [[user_msg, bot_msg], ...]
+        history: List of previous message dictionaries
     """
     # Build conversation context (limit history to last 5 exchanges for speed)
     conversation = []
-    recent_history = history[-5:] if len(history) > 5 else history
-    for user_msg, bot_msg in recent_history:
-        conversation.append({"role": "user", "content": user_msg})
-        conversation.append({"role": "assistant", "content": bot_msg})
 
+    # Process history - in Gradio ChatInterface, history is a list of dicts
+    recent_history = history[-10:] if len(history) > 10 else history  # Last 5 exchanges (10 messages)
+    conversation.extend(recent_history)
+
+    # Add current message
     conversation.append({"role": "user", "content": message})
 
     # Apply chat template
@@ -92,76 +93,38 @@ def chat_with_ceo(message, history):
     # Decode response
     response = tokenizer.decode(outputs[0][inputs['input_ids'].shape[1]:], skip_special_tokens=True)
 
-    # Return updated history in the format Gradio expects
-    history.append([message, response])
-    return history
-
-# Create Gradio interface
-with gr.Blocks() as demo:
-    gr.Markdown(
-        """
-        # 🎯 CEO AI Executive
-
-        Chat with an AI trained on your CEO's writing style and thoughts.
-        Ask questions about business strategy, leadership, technology, or any topic your CEO writes about.
-
-        **Note:** This AI responds based on patterns learned from the CEO's blog posts and writings.
-
-        ---
-
-        ✅ **Model Status:** Loaded and ready! The model is kept in memory for fast responses.
-        """
-    )
-
-    chatbot = gr.Chatbot(
+    # Return just the response string - ChatInterface handles the history
+    return response
+
+# Create Gradio ChatInterface
+demo = gr.ChatInterface(
+    fn=chat_with_ceo,
+    title="🎯 CEO AI Executive",
+    description="""
+    Chat with an AI trained on your CEO's writing style and thoughts.
+    Ask questions about business strategy, leadership, technology, or any topic your CEO writes about.
+
+    **Note:** This AI responds based on patterns learned from the CEO's blog posts and writings.
+
+    ✅ **Model Status:** Loaded and ready! The model is kept in memory for fast responses.
+    """,
+    examples=[
+        "What's your vision for the company?",
+        "How do you approach leadership?",
+        "What are your thoughts on innovation?",
+        "Can you share your perspective on team building?",
+        "What drives your business strategy?"
+    ],
+    chatbot=gr.Chatbot(
         height=500,
-        label="Chat with CEO AI",
-        show_label=True,
         avatar_images=(None, "🎯")
-    )
-
-    with gr.Row():
-        msg = gr.Textbox(
-            label="Your Message",
-            placeholder="Ask me anything...",
-            show_label=False,
-            scale=4
-        )
-        submit = gr.Button("Send", variant="primary", scale=1)
-
-    with gr.Row():
-        clear = gr.Button("Clear Chat")
-
-    gr.Examples(
-        examples=[
-            "What's your vision for the company?",
-            "How do you approach leadership?",
-            "What are your thoughts on innovation?",
-            "Can you share your perspective on team building?",
-            "What drives your business strategy?"
-        ],
-        inputs=msg,
-        label="Example Questions"
-    )
-
-    gr.Markdown(
-        """
-        ---
-        ### About This AI
-        This chatbot uses a fine-tuned Qwen3-30B language model trained on the CEO's blog posts and writings.
-        It attempts to replicate their writing style, thinking patterns, and perspectives on various topics.
-        """
-    )
-
-    # Event handlers
-    msg.submit(chat_with_ceo, inputs=[msg, chatbot], outputs=[chatbot]).then(
-        lambda: "", None, msg
-    )
-    submit.click(chat_with_ceo, inputs=[msg, chatbot], outputs=[chatbot]).then(
-        lambda: "", None, msg
-    )
-    clear.click(lambda: [], None, chatbot, queue=False)
+    ),
+    textbox=gr.Textbox(placeholder="Ask me anything...", container=False, scale=7),
+    submit_btn="Send",
+    retry_btn="🔄 Retry",
+    undo_btn="↩️ Undo",
+    clear_btn="🗑️ Clear",
+)
 
 if __name__ == "__main__":
-    demo.queue()
-    demo.launch(share=False, ssr_mode=False)
+    demo.launch()