Update app.py

app.py

@@ -2336,6 +2336,8 @@ SELECTION_JS = """
         document.body.classList.toggle('dark', dark);
         const container = document.querySelector('.gradio-container');
         if (container) container.classList.toggle('dark', dark);
+        const el = document.getElementById('theme-emoji');
+        if (el) el.textContent = dark ? '☀️' : '🌙';
     }
     function toggleDark() {
         const url = new URL(window.location);
@@ -2495,7 +2497,7 @@ with gr.Blocks(css_paths="style.css", title="Lolaby", theme=gr.themes.Citrus(),
     gr.HTML("""
     <div style="text-align:right; padding: 12px 18px 0;">
     <label class="dark-toggle-label">
-        <span>☀️🌙</span>
+        <span id="theme-emoji">🌙</span>
         <input type="checkbox" id="dark-toggle-btn" role="switch"
             onchange="window._lolaby_toggleDark && window._lolaby_toggleDark()">
     </label>