微件:GF立绘切换

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               var base = activeBtn.dataset.filename;
               var isDmg = activeBtn.dataset.state === 'damage';
               var target = isDmg ? base : base.substring(0, base.lastIndexOf('.')) + '_D' + base.substring(base.lastIndexOf('.'));
               
               container.classList.add('loading');
               getImgPath(target, img.src, function(url) {
                   if (url) {
                       var t = new Image();
                       t.onload = function() { img.src = url; activeBtn.dataset.state = isDmg ? 'normal' : 'damage'; container.classList.remove('loading'); };
                       t.onerror = function() { container.classList.remove('loading'); };
                       t.src = url;
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           btns.forEach(function (btn) {
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                   var oldImg = container.querySelector('img');
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                   getImgPath(filename, (oldImg ? oldImg.src : null), function(url) {
                       if (url) {
                           setTimeout(function () {
                               // 彻底修复点：统一切换后的 HTML 结构

container.innerHTML = '

<img src="' + url + '" style="opacity:0;">

';

                               container.appendChild(viewBtn);
                               var n = container.querySelector('img');
                               n.onload = function () { n.style.opacity = '1'; };
                               if (n.complete) n.style.opacity = '1';
                           }, 150);
                       }
                   });
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