feat(helpdesk): align module with core list/drawer standards

- add helpdesk module pages, services, settings and tests

- standardize debtor list on drawer/grid contracts and robust filter drawer behavior

- add helpdesk aside panel navigation and settings visibility provider

- switch primary list slug to helpdesk/debitor and remove helpdesk/search compatibility

- include required core contract updates for list contracts and detail/drawer integration

modules/helpdesk/web/js/helpdesk-clickable-rows.js

@@ -0,0 +1,29 @@
+/**
+ * Shared clickable-row behaviour for helpdesk tables.
+ * Navigates to `data-href` on click or Enter/Space key.
+ */
+export function initClickableRows() {
+  const rows = document.querySelectorAll('.app-clickable-row[data-href]');
+
+  rows.forEach((row) => {
+    row.addEventListener('click', (event) => {
+      if (event.target.closest('a')) {
+        return;
+      }
+      const href = row.dataset.href;
+      if (href) {
+        window.location.href = href;
+      }
+    });
+
+    row.addEventListener('keydown', (event) => {
+      if (event.key === 'Enter' || event.key === ' ') {
+        event.preventDefault();
+        const href = row.dataset.href;
+        if (href) {
+          window.location.href = href;
+        }
+      }
+    });
+  });
+}