Update app.py

app.py

@@ -60,9 +60,8 @@ with gr.Blocks(title="Math Tutor AI") as demo:
     """)
 
     chatbot = gr.Chatbot(
-        height = 450,
-        label  = "Math Tutor",
-        type   = "messages",
+        height           = 450,
+        label            = "Math Tutor",
         show_copy_button = True,
     )
 
@@ -78,8 +77,8 @@ with gr.Blocks(title="Math Tutor AI") as demo:
     clear = gr.Button("🗑️ Clear Chat", variant="secondary")
 
     gr.Examples(
-        label   = "Try these examples:",
-        examples=[
+        label    = "Try these examples:",
+        examples = [
             "Solve: 2x² - 7x + 3 = 0",
             "Find the area of a triangle with base 12 cm and height 8 cm.",
             "If sin θ = 3/5, find cos θ and tan θ.",
@@ -87,7 +86,7 @@ with gr.Blocks(title="Math Tutor AI") as demo:
             "Find the compound interest on ₹5000 at 10% per annum for 2 years.",
             "Prove that √2 is irrational.",
         ],
-        inputs  = question,
+        inputs   = question,
     )
 
     gr.Markdown("""
@@ -96,8 +95,15 @@ with gr.Blocks(title="Math Tutor AI") as demo:
     """)
 
     # ── Event Handlers ──────────────────────────────────────
-    submit.click(respond, [question, chatbot], [question, chatbot])
-    question.submit(respond, [question, chatbot], [question, chatbot])
+    def respond_tuple(question, history):
+        if not question.strip():
+            return "", history
+        answer = solve(question, history)
+        history = history + [[question, answer]]
+        return "", history
+
+    submit.click(respond_tuple, [question, chatbot], [question, chatbot])
+    question.submit(respond_tuple, [question, chatbot], [question, chatbot])
     clear.click(lambda: ([], ""), outputs=[chatbot, question])
 
 demo.launch(theme=gr.themes.Soft())