Update app.py

app.py

@@ -626,6 +626,11 @@ with gr.Blocks() as demo:
     with gr.Tab("Step 2: Optimize Portfolio"):
         gr.HTML(STEP3_TITLE)
         with gr.Blocks() as app:
+            with gr.Row():
+                btn1 = gr.Button("Button 1")
+                btn2 = gr.Button("Button 2")
+                btn3 = gr.Button("Button 3")
+                btn4 = gr.Button("Button 4")
             with gr.Row():
                 gr.HTML("<h1>Stock Portfolio Optimizer</h1>")