feat(admin): dock ticket reply composer in conversation and move notes to a dialog

Put the reply composer at the bottom of the conversation card so the
timeline and composer form one viewport-height panel; the send button is
visible on load and Ctrl/Cmd+Enter submits. Internal notes now open in a
dialog instead of expanding inline, so the sidebar no longer grows.

Remove the shared ticket_composer helper and the inline note expansion CSS;
both dialogs share ticket_dialog_head.

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

assets/js/admin-tickets.js

@@ -1,4 +1,4 @@
-/** 工单后台：列表与处理工作区为页内视图，代客提交为列表页上的原生 dialog；写操作只使用工单 REST 接口，成功后整页跳转刷新。 */
+/** 工单后台：列表与处理工作区为页内视图；代客提交与内部备注为原生 dialog。写操作只使用工单 REST 接口，成功后整页跳转刷新。 */
 (function () {
   'use strict';
 
@@ -7,9 +7,13 @@
   if (!root || !config) return;
 
   var strings = config.strings;
-  var dialog = document.getElementById('aksrt-ticket-create-dialog');
+  var dialogs = Array.prototype.slice.call(root.querySelectorAll('dialog.aksrt-ticket-dialog'));
   var opener = null;
-  var feedbackBox = root.querySelector('[data-aksrt-ticket-feedback]');
+  // 页面级提示（工作区顶部）；弹窗内的表单使用弹窗自己的提示框。
+  var pageFeedback = Array.prototype.slice.call(root.querySelectorAll('[data-aksrt-ticket-feedback]')).filter(function (box) {
+    return !box.closest('dialog');
+  })[0] || null;
+  var feedbackBox = pageFeedback;
   var detail = root.querySelector('[data-aksrt-ticket-detail]');
   var ticketId = detail ? parseInt(detail.dataset.aksrtTicketDetail, 10) : 0;
   var draftKey = 'aksrt-ticket-drafts-' + ticketId;
@@ -177,17 +181,32 @@
     }
   }
 
-  /** 关闭代客提交弹窗：保存中不可关；有未保存输入时先确认。不响应遮罩点击，避免误关丢失输入。 */
-  function closeDialog() {
+  /** 表单所在弹窗的提示框优先，否则用页面级提示框。 */
+  function feedbackFor(node) {
+    var host = node && node.closest('dialog');
+    return (host && host.querySelector('[data-aksrt-ticket-feedback]')) || pageFeedback;
+  }
+
+  /** 只比较弹窗内表单的改动，弹窗外的回复草稿不影响关闭确认。 */
+  function dialogDirty(dialog) {
+    var form = dialog.querySelector('[data-aksrt-ticket-form]');
+    if (!form) return false;
+    var base = baselines.get(form) || {};
+    var current = values(form);
+    return Object.keys(current).some(function (key) { return current[key] !== base[key]; });
+  }
+
+  /** 关闭弹窗：保存中不可关；有未保存输入时先确认。不响应遮罩点击，避免误关丢失输入。 */
+  function closeDialog(dialog) {
     if (saving || !dialog.open) return;
-    if (!stale && Object.keys(drafts()).length && !window.confirm(strings.discard)) return;
+    if (!stale && dialogDirty(dialog) && !window.confirm(strings.discard)) return;
     dialog.close();
   }
 
-  if (dialog) {
+  dialogs.forEach(function (dialog) {
     dialog.addEventListener('cancel', function (event) {
       event.preventDefault();
-      closeDialog();
+      closeDialog(dialog);
     });
     dialog.addEventListener('close', function () {
       var form = dialog.querySelector('[data-aksrt-ticket-form]');
@@ -196,11 +215,14 @@
         baselines.set(form, values(form));
         form.querySelectorAll('[name]').forEach(validateText);
         form.querySelectorAll('[data-aksrt-ticket-editor]').forEach(counter);
+        feedbackBox = feedbackFor(dialog);
         feedback('', false, false);
       }
+      feedbackBox = pageFeedback;
       if (opener && opener.isConnected) opener.focus();
+      opener = null;
     });
-  }
+  });
 
   root.addEventListener('click', function (event) {
     if (event.target.closest('[data-aksrt-ticket-reload]')) {
@@ -208,17 +230,22 @@
       window.location.reload();
       return;
     }
-    if (dialog && event.target.closest('[data-aksrt-dialog-close]')) {
-      closeDialog();
+    var closer = event.target.closest('[data-aksrt-dialog-close]');
+    if (closer && closer.closest('dialog')) {
+      closeDialog(closer.closest('dialog'));
       return;
     }
-    var open = dialog && event.target.closest('[data-aksrt-dialog-open="' + dialog.id + '"]');
-    if (open) {
+    var open = event.target.closest('[data-aksrt-dialog-open]');
+    var target = open && document.getElementById(open.dataset.aksrtDialogOpen);
+    if (target && dialogs.indexOf(target) !== -1) {
       if (saving) return;
       opener = open;
+      feedbackBox = feedbackFor(target);
       // 结果未确认时保留「重新加载」提示，重新打开也不能再提交。
       if (!stale) feedback('', false, false);
-      dialog.showModal();
+      target.showModal();
+      var focus = target.querySelector('[autofocus]') || target.querySelector('h2');
+      if (focus) focus.focus();
       return;
     }
     if (saving || stale) return;
@@ -241,6 +268,18 @@
     if (event.target.matches('[data-aksrt-ticket-editor]')) counter(event.target);
   });
 
+  // 回复框 Ctrl/⌘ + Enter 直接发送；输入法组字中不触发。
+  root.addEventListener('keydown', function (event) {
+    if (event.key !== 'Enter' || !(event.ctrlKey || event.metaKey) || event.isComposing) return;
+    if (!event.target.matches('[data-aksrt-ticket-send-shortcut]')) return;
+    var form = event.target.form;
+    if (!form) return;
+    event.preventDefault();
+    // 走 submit 事件，保证与点击「发送回复」经过同一套校验与防重。
+    if (typeof form.requestSubmit === 'function') form.requestSubmit();
+    else form.querySelector('[type="submit"]').click();
+  });
+
   root.addEventListener('change', function (event) {
     var select = event.target;
     if (select.matches('[data-aksrt-ticket-status]')) {
@@ -256,6 +295,7 @@
     var insert = (before && !/\n$/.test(before) ? '\n' : '') + select.value;
     var next = before + insert + field.value.slice(end);
     if (next.length > field.maxLength) {
+      feedbackBox = feedbackFor(field);
       feedback(strings.tooLong, true, false);
     } else {
       field.value = next;
@@ -279,6 +319,7 @@
     var remaining = drafts(form);
     var controller = new AbortController();
     var timer = setTimeout(function () { controller.abort(); }, 30000);
+    feedbackBox = feedbackFor(form);
     busy(form, true);
     feedback(strings.saving, false, false);
     try {