修复代码折叠bug

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

@@ -88,9 +88,9 @@ window.initCodeFold = function() {
         var pre = block.querySelector('pre');
         if (!pre) return;
 
-        // Use pre's content height; 0 means layout not ready, wrap conservatively
+        // Use pre's content height; 0 means layout not ready, skip
         var contentHeight = pre.scrollHeight || block.scrollHeight;
-        if (contentHeight && contentHeight <= 360) return;
+        if (!contentHeight || contentHeight <= 360) return;
 
         var wrapper = document.createElement('div');
         wrapper.className = 'code-fold-container collapsed';
@@ -137,7 +137,7 @@ window.initCodeCopy = function() {
         pre.addEventListener('mouseenter', function() { btn.style.opacity = '1'; });
         pre.addEventListener('mouseleave', function() { btn.style.opacity = '0'; });
 
-        if (window.isMobile()) { btn.style.opacity = '1'; }
+        if (typeof window.isMobile === 'function' && window.isMobile()) { btn.style.opacity = '1'; }
 
         btn.addEventListener('click', function(e) {
             e.stopPropagation();