fix(widget): 完善自动回复与新会话进线提醒

web/public/widget.js

@@ -18,6 +18,7 @@
     console.warn('[kefu-widget] missing data-id on script tag');
     return;
   }
+  var autoOpen = !(script && /^(false|0)$/i.test(script.getAttribute('data-auto-open') || ''));
 
   var src = script && script.src ? script.src : '';
   var base = '';
@@ -139,6 +140,15 @@
     }
   }
 
+  function shouldAutoOpenOnce() {
+    var key = 'kefu_widget_auto_opened_' + channelKey;
+    try {
+      if (window.sessionStorage.getItem(key) === '1') return false;
+      window.sessionStorage.setItem(key, '1');
+    } catch (e) { /* privacy mode: fall back to opening on each page load */ }
+    return true;
+  }
+
   btn.addEventListener('click', function () { setOpen(true); });
 
   window.addEventListener('message', function (event) {
@@ -188,6 +198,11 @@
   function mount() {
     document.body.appendChild(btn);
     document.body.appendChild(panel);
+    if (autoOpen) {
+      window.setTimeout(function () {
+        if (!open && shouldAutoOpenOnce()) setOpen(true);
+      }, 600);
+    }
   }
   if (document.readyState === 'loading') {
     document.addEventListener('DOMContentLoaded', mount);