Fix Gradio 6.0 API: move theme/css to launch(), remove unsupported show_download_button

app.py

@@ -309,12 +309,14 @@ custom_css = """
 }
 """
 
-with gr.Blocks(title="SAM 3 Asset Extractor", css=custom_css, theme=gr.themes.Soft(
+app_theme = gr.themes.Soft(
     primary_hue="orange",
     secondary_hue="blue",
     neutral_hue="slate",
     font=gr.themes.GoogleFont("Inter"),
-)) as demo:
+)
+
+with gr.Blocks(title="SAM 3 Asset Extractor") as demo:
     gr.Markdown("# SAM 3 Concept Asset Extractor", elem_id="app-title")
     gr.Markdown(
         "Upload a presentation slide to automatically extract all distinct elements "
@@ -349,8 +351,6 @@ with gr.Blocks(title="SAM 3 Asset Extractor", css=custom_css, theme=gr.themes.So
                 columns=3,
                 object_fit="contain",
                 height=650,
-                show_download_button=True,
-                show_share_button=False,
                 elem_classes=["gallery-container"],
                 preview=True,
             )
@@ -358,4 +358,4 @@ with gr.Blocks(title="SAM 3 Asset Extractor", css=custom_css, theme=gr.themes.So
     submit_btn.click(fn=extract_assets, inputs=[input_image], outputs=[output_gallery])
 
 if __name__ == "__main__":
-    demo.launch()
+    demo.launch(css=custom_css, theme=app_theme)