Article page: offcanvas-lg sidebar (sticky desktop, right slide mobile), compact action row; persistent accordion state (localStorage)

web/src/main/resources/templates/learn/chapter.html

@@ -14,7 +14,7 @@
         <span th:if="${!chapter.published}" class="badge badge-warn ml-2">скрыто</span>
     </h1>
 
-    <div th:if="${currentUser != null and currentUser.admin}" class="flex flex-wrap gap-2 mb-4">
+    <div th:if="${currentUser != null and currentUser.admin}" class="flex flex-wrap gap-2 mb-4 action-row">
         <button class="btn btn-primary" type="button" data-modal="modal-new-section">+ Раздел</button>
         <button class="btn btn-secondary btn-sm p-2" type="button" data-modal="modal-rename-chapter" title="Переименовать главу" aria-label="Переименовать главу"><i class="cell-ico ico bi bi-pencil" aria-hidden="true"></i></button>
         <form class="inline-form" th:action="@{/admin/content/chapters/toggle-published}" method="post">