加入昼夜切换的动画优化

themes/Ying/assets/js/modules/utils.js

@@ -1,41 +1,23 @@
 function themeSweep(newTheme, callback) {
-    // View Transition API — browser-native crossfade, zero JS animation overhead.
-    // Same principle as image lightbox transitions. Chrome/Edge 111+, Opera 97+.
+    // View Transition API — best quality if available
     if (document.startViewTransition) {
         document.startViewTransition(function() { callback(); });
         return;
     }
 
-    // Fallback: lightweight overlay for Safari / Firefox
-    var oldTheme = document.documentElement.getAttribute('data-theme');
-    var tint = oldTheme === 'dark'
-        ? 'rgba(15,23,42,0.95)'
-        : 'rgba(255,255,255,0.95)';
-
-    var overlay = document.createElement('div');
-    overlay.style.cssText =
-        'position:fixed;inset:0;z-index:9999;pointer-events:none;' +
-        'background:' + tint + ';opacity:1;' +
-        'transition:opacity 0.22s ease;' +
-        'will-change:opacity;contain:paint;';
-    document.body.appendChild(overlay);
-
-    var cleaned = false;
-    function cleanup() {
-        if (cleaned) return;
-        cleaned = true;
-        if (overlay.parentNode) overlay.parentNode.removeChild(overlay);
+    // UIkit animate fallback
+    if (window.UIkit && UIkit.animate) {
+        var body = document.body;
+        UIkit.animate(body, 'uk-animation-fade uk-animation-fast');
+        setTimeout(function() {
+            callback();
+            UIkit.animate(body, 'uk-animation-fade uk-animation-fast');
+        }, 150);
+        return;
     }
 
+    // Last resort: simple opacity
     callback();
-    overlay.offsetWidth;
-    overlay.style.opacity = '0';
-
-    overlay.addEventListener('transitionend', function(e) {
-        if (e.propertyName !== 'opacity') return;
-        cleanup();
-    });
-    setTimeout(cleanup, 380);
 }
 
 // Toast Message Helper