feat(helpdesk): add refresh button to ticket detail titlebar

Adds 'Refresh data' button that re-fetches the communication feed
with ?refresh=1 to bypass the session cache. Shows loading skeleton
during reload.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

modules/helpdesk/pages/helpdesk/ticket(default).phtml

@@ -31,7 +31,14 @@ $backUrl = $ticketCustomerNo !== '' ? lurl('helpdesk/debitor/' . rawurlencode($t
         'title' => t('Ticket') . ' ' . $ticketNo,
         'backHref' => $backUrl,
         'backTitle' => t('Back'),
-        'actions' => [],
+        'actions' => $ticket !== null ? [
+            [
+                'label' => t('Refresh data'),
+                'type' => 'button',
+                'name' => 'ticket-refresh',
+                'class' => 'secondary outline',
+            ],
+        ] : [],
     ];
     require templatePath('partials/app-details-titlebar.phtml');
     ?>

modules/helpdesk/web/js/helpdesk-ticket.js

@@ -41,16 +41,18 @@ function init(container) {
     if (el) el.hidden = false;
   }
 
-  async function loadCommunication() {
+  async function loadCommunication(refresh = false) {
     const feedEl = document.getElementById('ticket-communication-feed');
     const loadingEl = document.getElementById('ticket-communication-loading');
     const contentEl = document.getElementById('ticket-communication-content');
     if (!feedEl || !loadingEl || !contentEl) return;
 
+    if (contentEl) contentEl.hidden = true;
     showLoading('ticket-communication-loading');
 
     try {
       const params = new URLSearchParams({ ticketNo });
+      if (refresh) params.set('refresh', '1');
       const response = await fetch(communicationUrl + '?' + params.toString(), { credentials: 'same-origin' });
       const data = await response.json();
 
@@ -85,5 +87,10 @@ function init(container) {
     }
   }
 
+  const refreshButton = container.querySelector('button[name="ticket-refresh"]');
+  if (refreshButton) {
+    refreshButton.addEventListener('click', () => loadCommunication(true));
+  }
+
   loadCommunication();
 }