Update app.py

app.py

@@ -90,14 +90,18 @@ def chat(message, history):
 #============starting extract_docx_text
 def respond(message, history):
     answer = qa_chain.invoke(message)
-    docs = retriever.invoke(message)  # Global or pass as state
+    docs = retriever.invoke(message)
     refs = [f"Page {d.metadata.get('page', 'N/A')}" for d in docs]
-    full_answer = f"{answer}\n\n**Refs:** {' | '.join(refs)}"
+    full_answer = f"{answer}\n\n**References:**\n" + "\n".join(refs)
+    
+    # CRITICAL: Append ONLY pure dicts - no metadata, tuples, or extras
+    new_history = history + [  # Or history.append() then return history
+        {"role": "user", "content": message},
+        {"role": "assistant", "content": full_answer}
+    ]
     
-    # Append in messages format
-    history.append({"role": "user", "content": message})
-    history.append({"role": "assistant", "content": full_answer})
-    return history
+    # Clear input
+    return "", new_history  # Return cleared msg, updated history
 #====================
 def extract_docx_text(file_path):
     doc = Document(file_path)
@@ -329,13 +333,12 @@ with gr.Blocks(css=css) as demo:
                         </div>"""
                    )
         with gr.TabItem("ChatBot-NRL manual-goods"):
-                gr.Markdown("# RAG Chatbot with Page References")
-                chatbot = gr.Chatbot(height=500)  # No 'type' arg!
-                msg = gr.Textbox(placeholder="What is GeM?", scale=4)
-                submit = gr.Button("Send", scale=1)
-                clear = gr.Button("Clear")
+                gr.Markdown("# RAG Chatbot")
+                chatbot = gr.Chatbot(height=500)  # Defaults to messages
+                msg = gr.Textbox(placeholder="Ask a question...", label="Query")
+                submit_btn = gr.Button("Submit")
                 
-                submit.click(respond, [msg, chatbot], [chatbot, msg])
-                msg.submit(respond, [msg, chatbot], [chatbot, msg])
-                clear.click(lambda: [], None, chatbot, queue=False)
+                # Events
+                submit_btn.click(respond, inputs=[msg, chatbot], outputs=[msg, chatbot])
+                msg.submit(respond, inputs=[msg, chatbot], outputs=[msg, chatbot])
 demo.queue().launch()