Update app.py

app.py

@@ -14,21 +14,21 @@ def chat(message, history=None):
     if history is None:
         history = []
 
-    # Get agent response as a pure string
+    # Get agent response as a clean string
     result = agent.run(message)
     response = result if isinstance(result, str) else str(result)
 
-    # Append cleanly formatted conversation
+    # Append conversation tuple
     history = list(history)
     history.append((message, response))
 
-    # Return response and full history (Gradio-safe)
+    # Return response and history in valid Gradio format
     return response, history
 
 
-# --- Graph rendering (optional visual debugging tool) ---
+# --- Graph rendering (placeholder for Phase 4 visualization) ---
 def render_graph():
-    return "Graph visualization placeholder (coming Phase 4+)"
+    return "🧠 Graph visualization placeholder — coming in Phase 4"
 
 
 # --- Build Gradio UI ---
@@ -37,7 +37,7 @@ with gr.Blocks(title="Aventra OS") as demo:
 
     chatbot = gr.Chatbot(
         label="Aventra Chat",
-        type="tuple",
+        type="tuples",        # ✅ Correct keyword
         show_label=True,
         height=500
     )
@@ -49,7 +49,6 @@ with gr.Blocks(title="Aventra OS") as demo:
     )
 
     send_btn = gr.Button("Send", variant="primary")
-
     send_btn.click(chat, inputs=[msg_box, chatbot], outputs=[msg_box, chatbot])
 
     gr.Markdown("---")