Update app.py

app.py

@@ -768,7 +768,12 @@ with gr.Blocks(css=custom_css, theme=gr.themes.Soft()) as demo:
     # Chat interface
     with gr.Row(elem_classes="container"):
         with gr.Column(scale=2, min_width=600):
-            chatbot = gr.Chatbot(height=400, bubble_full_width=False, show_copy_button=True, elem_classes="chat-container")
+            chatbot = gr.Chatbot(
+                height=400, 
+                show_copy_button=True, 
+                elem_classes="chat-container",
+                type="messages"  # Use the new messages format
+            )
             with gr.Row():
                 msg = gr.Textbox(
                     show_label=False, 
@@ -799,6 +804,15 @@ with gr.Blocks(css=custom_css, theme=gr.themes.Soft()) as demo:
     )
     
     # Event Handlers for Excel processing
+    def update_excel_preview(state):
+        if not state:
+            return "", "No Excel file uploaded yet"
+        preview = state.get("data_preview", "")
+        sheets = state.get("total_sheets", 0)
+        rows = state.get("total_rows", 0)
+        stats = f"**Excel Statistics:**\nSheets: {sheets}\nTotal Rows: {rows}"
+        return preview, stats
+    
     excel_upload_button.click(
         lambda x: ("excel", x),
         inputs=[excel_file],
@@ -808,11 +822,8 @@ with gr.Blocks(css=custom_css, theme=gr.themes.Soft()) as demo:
         inputs=[excel_file],
         outputs=[current_session_id, file_status, excel_state]
     ).then(
-        lambda preview, sheets, rows: (
-            preview, 
-            f"**Excel Statistics:**\nSheets: {sheets}\nTotal Rows: {rows}"
-        ),
-        inputs=[excel_state["data_preview"], excel_state["total_sheets"], excel_state["total_rows"]],
+        update_excel_preview,
+        inputs=[excel_state],
         outputs=[excel_preview, excel_stats]
     )