Update app.py

app.py

@@ -220,7 +220,13 @@ def get_top_bottom_news(date_obj):
     return f"<ul>{top_news_html}</ul>", f"<ul>{bottom_news_html}</ul>"
 
 with gr.Blocks(
-    theme=gr.themes.Soft(primary_hue="sky", secondary_hue="orange")
+    theme=gr.themes.Soft(primary_hue="sky", secondary_hue="orange"), 
+    js="""
+() => {
+    document.body.classList.toggle('dark');
+    document.querySelector('gradio-app').style.backgroundColor = 'var(--color-background-primary)'
+}
+"""
 ) as app:
     gr.Markdown(f"""<div style='text-align: center; padding: 20px; color: white;'><h1 style='font-size: 3em; color: #00BFFF;'>📈 Crypto Pulse</h1><p style='font-size: 1.2em; color: #A9A9A9;'>比特幣新聞情緒與價格分析儀表板</p><p style='font-size: 0.9em; color: #888;'>Designed by: {DEVELOPER_NAME}</p></div>""")