Update app.py

app.py

@@ -189,12 +189,14 @@ ANSWER:"""
 
 # =========================
 # 💬 CHAT FUNCTION
+# Gradio 5 uses {"role": ..., "content": ...} dicts, not tuples
 # =========================
 def chat(message, history):
     if not message.strip():
         return "", history
     reply = generate(message)
-    history.append((message, reply))
+    history.append({"role": "user", "content": message})
+    history.append({"role": "assistant", "content": reply})
     return "", history
 
 # =========================
@@ -225,7 +227,8 @@ with gr.Blocks(title="Groq RAG Assistant") as app:
 
         with gr.Column(scale=2):
             gr.Markdown("### 💬 Ask Your Documents")
-            chatbot = gr.Chatbot(height=480, bubble_full_width=False)
+            # Gradio 5: type="messages" uses the new dict format
+            chatbot = gr.Chatbot(height=480, type="messages")
             msg = gr.Textbox(
                 placeholder="Ask a question about your documents…",
                 label="Your question",