Tables: initial ФИО order, click-to-sort columns, substring search

- identity group detail (and thus every student list) is ordered by full name;
  defense rows on the group page sorted by name + lab number
- tablekit.js: click a header to sort (numeric-aware, ru locale), second click
  flips direction (▲/▼ indicator); search input with data-target filters rows
  by substring live
- tables wired: group matrix (with data-sort on variant cells), defense table
  (data-sort on status/date), students table, lab assignment lists per group,
  groups list and labs list; name/number columns pre-marked ascending
- non-sortable columns marked data-nosort (checkbox/actions)

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

@@ -71,13 +71,17 @@
         </div>
     </div>
 
-    <div th:each="g : ${assignmentGroups}" class="card mb-4" th:if="${!#lists.isEmpty(g.students)}">
+    <div th:each="g, gStat : ${assignmentGroups}" class="card mb-4" th:if="${!#lists.isEmpty(g.students)}">
         <div class="card-body">
-            <h3 class="group-title" th:text="${g.groupName}">Группа</h3>
+            <div class="flex flex-wrap items-center justify-between gap-2 mb-2">
+                <h3 class="group-title m-0" th:text="${g.groupName}">Группа</h3>
+                <input class="input input-sm table-search" th:attr="data-target='assign-table-' + ${gStat.index}"
+                       placeholder="Поиск по студенту…" aria-label="Поиск по студентам группы">
+            </div>
             <div class="scroll-x">
-                <table>
+                <table class="tablekit" th:attr="id='assign-table-' + ${gStat.index}">
                     <thead><tr>
-                        <th class="th-w-sm">Выбор</th><th>Студент</th><th class="th-w-md">Уровень</th><th class="th-w-md">Вариант</th>
+                        <th class="th-w-sm" data-nosort>Выбор</th><th class="th-sortable is-asc" title="ФИО — по возрастанию">Студент</th><th class="th-w-md">Уровень</th><th class="th-w-md">Вариант</th>
                         <th class="th-w-sm">Источник</th><th>Сдача</th>
                     </tr></thead>
                     <tbody>