Update app.py

app.py

@@ -261,6 +261,9 @@ def create_interface():
     
     js_code = """
     function gradio_init() {
+        document.documentElement.classList.add('dark');
+        
+        // 設定事件監聽
         const observer = new MutationObserver((mutations, obs) => {
             const table = document.getElementById('periodic-table-container');
             if (table) {