add default value for decoding

app_dialogue.py

@@ -289,6 +289,7 @@ with gr.Blocks(title="IDEFICS", theme=gr.themes.Base()) as demo:
                         "sampling_top_k",
                         "sampling_top_p",
                     ],
+                    value="greedy",
                     label="Decoding strategy",
                 )
                 temperature = gr.Slider(