Dismissing the required-comment modal no longer looks like a close (#20)

A modal can be dismissed four ways: the ✕ button, Cancel, a backdrop click, or
Escape. base.js handles the last two globally (a document click handler and
registerKey('escape', closeAllModals)), so the status-change modal — which wired
only the two buttons — never learned it had been dismissed. The status dropdown
kept displaying the new status even though update_ticket.php was never called,
so the ticket looked closed with no comment until a reload showed it still open.

The same gap left every dynamically-inserted modal in the DOM when dismissed
that way, so the next open inserted a duplicate id that shadowed the live one.

- base.js closeModal now dispatches a bubbling lt:modalclose event (synced to
  web_template as bbec859), and _statusCommentModal treats it as "no comment".
- ticket.js reverts the dropdown on any dismissal, guarded against the re-entry
  its own lt.modal.close() would otherwise cause.
- dashboard.js gains openModalWithDismiss() so all seven dynamic modals plus the
  generic prompt modal tear down however they are dismissed.

Verified in headless chromium against all four dismissal routes plus a
confirm-with-comment control: 22/22. Against the pre-fix files the same test
fails 6 assertions — backdrop and Escape leave the dropdown on "Closed *" with
an orphaned overlay — so it reproduces the reported behaviour exactly.

assets/js/dashboard.js

@@ -550,7 +550,7 @@ function bulkClose() {
     `;
 
     document.body.insertAdjacentHTML('beforeend', modalHtml);
-    lt.modal.open('bulkCloseModal');
+    openModalWithDismiss('bulkCloseModal', closeBulkCloseModal);
 }
 
 function closeBulkCloseModal() {
@@ -633,7 +633,7 @@ function showBulkAssignModal() {
     `;
 
     document.body.insertAdjacentHTML('beforeend', modalHtml);
-    lt.modal.open('bulkAssignModal');
+    openModalWithDismiss('bulkAssignModal', closeBulkAssignModal);
     setTimeout(() => { const inp = document.getElementById('bulkAssignUserInput'); if (inp) inp.focus(); }, 120);
 
     lt.api.get('/api/get_users.php')
@@ -731,7 +731,7 @@ function showBulkPriorityModal() {
     `;
 
     document.body.insertAdjacentHTML('beforeend', modalHtml);
-    lt.modal.open('bulkPriorityModal');
+    openModalWithDismiss('bulkPriorityModal', closeBulkPriorityModal);
 }
 
 function closeBulkPriorityModal() {
@@ -845,7 +845,7 @@ function showBulkStatusModal() {
     `;
 
     document.body.insertAdjacentHTML('beforeend', modalHtml);
-    lt.modal.open('bulkStatusModal');
+    openModalWithDismiss('bulkStatusModal', closeBulkStatusModal);
 }
 
 function closeBulkStatusModal() {
@@ -942,7 +942,7 @@ function showBulkDeleteModal() {
     `;
 
     document.body.insertAdjacentHTML('beforeend', modalHtml);
-    lt.modal.open('bulkDeleteModal');
+    openModalWithDismiss('bulkDeleteModal', closeBulkDeleteModal);
 }
 
 function closeBulkDeleteModal() {
@@ -1032,6 +1032,22 @@ function showInputModal(title, label, placeholder = '', onSubmit, onCancel = nul
     input.addEventListener('keypress', (e) => { if (e.key === 'Enter') handleSubmit(); });
     document.getElementById(`${modalId}_cancel`).addEventListener('click', () => cleanup(onCancel));
     modal.querySelector('[data-modal-close]').addEventListener('click', () => cleanup(onCancel));
+    // Backdrop click / Escape close the overlay via base.js's global handlers.
+    modal.addEventListener('lt:modalclose', () => cleanup(onCancel));
+}
+
+/**
+ * Open a dynamically-inserted modal and make sure it tears itself down however it
+ * is dismissed. base.js handles backdrop clicks and Escape globally, so wiring
+ * only the ✕/Cancel buttons leaves the overlay in the DOM — and the next open
+ * inserts a second element with the same id, which then shadows the live one.
+ */
+function openModalWithDismiss(modalId, onDismiss) {
+    lt.modal.open(modalId);
+    const el = document.getElementById(modalId);
+    // lt.modal.close() early-returns once .is-open is gone, so the close call
+    // inside onDismiss cannot re-enter this listener.
+    if (el) el.addEventListener('lt:modalclose', onDismiss);
 }
 
 // ========================================
@@ -1069,7 +1085,7 @@ function quickStatusChange(ticketId, currentStatus) {
     `;
 
     document.body.insertAdjacentHTML('beforeend', modalHtml);
-    lt.modal.open('quickStatusModal');
+    openModalWithDismiss('quickStatusModal', closeQuickStatusModal);
 }
 
 function closeQuickStatusModal() {
@@ -1136,7 +1152,7 @@ function quickAssign(ticketId) {
     `;
 
     document.body.insertAdjacentHTML('beforeend', modalHtml);
-    lt.modal.open('quickAssignModal');
+    openModalWithDismiss('quickAssignModal', closeQuickAssignModal);
 
     lt.api.get('/api/get_users.php')
         .then(data => {