fix(admin): auto-dismiss transient ticket dialog feedback

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

assets/js/admin-tickets.js

@@ -27,6 +27,7 @@
   var readController = null;
   var generation = 0;
   var pointerOutside = false;
+  var feedbackTimer = 0;
 
   function values(form) {
     var result = {};
@@ -94,12 +95,16 @@
     container.querySelectorAll('[data-aksrt-ticket-editor]').forEach(counter);
   }
 
+  /** 成功与可忽略的错误提示自动消失；加载/保存中与需重试的提示保留到状态变化。 */
   function feedback(dialog, message, error, retry) {
     var box = dialog.querySelector('[data-aksrt-ticket-feedback]');
+    clearTimeout(feedbackTimer);
     box.hidden = !message;
     box.classList.toggle('is-error', !!error);
     box.querySelector('p').textContent = message || '';
     box.querySelector('[data-aksrt-ticket-retry]').hidden = !retry;
+    if (!message || retry || message === strings.loading || message === strings.saving) return;
+    feedbackTimer = setTimeout(function () { box.hidden = true; }, error ? 6000 : 3000);
   }
 
   function busy(value) {