diff --git a/public/js/app.js b/public/js/app.js
index 27a65f3..a2293a0 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -1682,9 +1682,6 @@
       if (dom.faviconUrlInput) dom.faviconUrlInput.value = settings.favicon_url || '';
       if (dom.showPageNameInput) dom.showPageNameInput.value = settings.show_page_name !== undefined ? settings.show_page_name.toString() : "1";
 
-      // Apply to UI
-      applySiteSettings(settings);
-
       // Handle Theme Priority: localStorage > Site Default
       const savedTheme = localStorage.getItem('theme');
       const themeToApply = savedTheme || settings.default_theme || 'dark';
@@ -1773,11 +1770,6 @@
     // Default Theme
     if (settings.default_theme) {
       if (dom.defaultThemeInput) dom.defaultThemeInput.value = settings.default_theme;
-      // If setting is 'auto', we also sync immediately
-      const savedTheme = localStorage.getItem('theme');
-      if (!savedTheme || savedTheme === 'auto') {
-        applyTheme(settings.default_theme);
-      }
     }
 
     // Filing info
@@ -1843,7 +1835,9 @@
         showSiteMessage('设置保存成功', 'success');
         // Update global object and UI immediately
         window.SITE_SETTINGS = { ...window.SITE_SETTINGS, ...settings };
-        applySiteSettings(window.SITE_SETTINGS);
+        const savedTheme = localStorage.getItem('theme');
+        const themeToApply = savedTheme || settings.default_theme || 'dark';
+        applyTheme(themeToApply);
       } else {
         const err = await response.json();
         showSiteMessage(`保存失败: ${err.error || '未知错误'}`, 'error');