fix Gradio 6 API: theme/css on launch, drop show_download_button

app.py

@@ -268,7 +268,7 @@ NOTES = f"""
   RoPE tables end. It stops itself and says so.
 """
 
-with gr.Blocks(theme=gr.themes.Citrus(), css=CSS, title="LiveWan") as demo:
+with gr.Blocks(title="LiveWan") as demo:
     with gr.Column(elem_id="col-container"):
         gr.Markdown(INTRO)
 
@@ -285,8 +285,7 @@ with gr.Blocks(theme=gr.themes.Citrus(), css=CSS, title="LiveWan") as demo:
             seed = gr.Number(value=0, precision=0, label="Seed", scale=0)
         run_btn = gr.Button("Stream", variant="primary")
 
-        preview = gr.Image(label="Live preview (faster than real time)",
-                           height=368, show_download_button=False)
+        preview = gr.Image(label="Live preview (faster than real time)", height=368)
         stats = gr.Markdown()
         video = gr.Video(label="The clip, at 16 fps", autoplay=True)
 
@@ -305,4 +304,4 @@ with gr.Blocks(theme=gr.themes.Citrus(), css=CSS, title="LiveWan") as demo:
     run_btn.click(run, inputs=[world, steer_to, steer_at, seconds, seed],
                   outputs=[preview, stats, video], concurrency_limit=1)
 
-demo.queue(max_size=12).launch(mcp_server=True)
+demo.queue(max_size=12).launch(theme=gr.themes.Citrus(), css=CSS, mcp_server=True)