Lab variants: redirect back anchors to the saved variant with highlight

web/src/main/resources/templates/admin/lab.html

@@ -99,7 +99,7 @@
                 </div>
             </div>
 
-            <div th:each="v : ${level.variants}" class="variant-block mb-4">
+            <div th:each="v : ${level.variants}" class="variant-block mb-4" th:id="'variant-' + ${v.id}">
                 <div class="flex flex-wrap items-center justify-between gap-2">
                     <div class="variant-name">Вариант <b th:text="${v.number}">—</b><span th:if="${v.title}"
                                                                                           class="text-muted"