feat(js): 复制链接按钮提供短暂已复制反馈(自动恢复)

public/js/admin.js

@@ -615,6 +615,27 @@
         var btns = document.querySelectorAll('[data-action="copy-link"][data-href]');
         if(!btns || btns.length === 0){return;}
 
+        function markCopied(btn, ok) {
+            try {
+                var orig = btn.getAttribute('data-orig-text');
+                if (!orig) {
+                    orig = String(btn.textContent || '');
+                    btn.setAttribute('data-orig-text', orig);
+                }
+
+                var nextText = ok ? '已复制' : '复制失败';
+                btn.textContent = nextText;
+                btn.disabled = true;
+
+                setTimeout(function(){
+                    try {
+                        btn.textContent = orig;
+                        btn.disabled = false;
+                    } catch (e) {}
+                }, 1200);
+            } catch (e) {}
+        }
+
         btns.forEach(function(btn){
             btn.addEventListener('click', function(){
                 var href = btn.getAttribute('data-href') || '';
@@ -622,11 +643,14 @@
 
                 var abs = absoluteUrl(href);
                 copyToClipboard(abs).then(function(){
+                    markCopied(btn, true);
+
                     if (toastSuccess('已复制' + label + '链接')) {
                         return;
                     }
                     try { window.alert('已复制' + label + '链接'); } catch (e) {}
                 }).catch(function(){
+                    markCopied(btn, false);
                     try { window.alert('复制失败，请手动复制' + label + '链接'); } catch (e) {}
                 });
             });