fixed 昼夜切换模式逻辑

themes/Ying/assets/js/main.js

@@ -231,6 +231,31 @@ function toggleTheme() {
     }
 }
 
+// Listen for system theme changes
+try {
+    const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
+    const handleSystemThemeChange = (e) => {
+        // Only follow system if user hasn't manually set a preference
+        if (!localStorage.getItem('theme')) {
+            const newTheme = e.matches ? 'dark' : 'light';
+            document.documentElement.setAttribute('data-theme', newTheme);
+            if (window.Artalk) {
+                Artalk.setDarkMode(newTheme === 'dark');
+            }
+        }
+    };
+    
+    // Modern browsers
+    if (mediaQuery.addEventListener) {
+        mediaQuery.addEventListener('change', handleSystemThemeChange);
+    } else if (mediaQuery.addListener) {
+        // Old Safari/IE
+        mediaQuery.addListener(handleSystemThemeChange);
+    }
+} catch (e) {
+    console.warn('System theme detection not supported', e);
+}
+
 // Update Floating Tools Visibility based on current page
 function updateFloatingToolsVisibility() {
     const tools = document.querySelector('.floating-tools');