Admin group: fix script loading (extra div), total submissions counter, label cleanup

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

@@ -12,7 +12,7 @@
         <div class="flex flex-wrap gap-2">
             <button class="btn btn-primary" type="button" onclick="openModal('modal-add-student')">+ Студент</button>
             <a class="btn btn-secondary" th:href="@{/admin/groups/{id}/credentials(id=${group.id}, format='xlsx')}">Скачать пароли</a>
-            <button class="btn btn-secondary" type="button" onclick="openModal('modal-defense-import')">Импорт заданий (CSV)</button>
+            <button class="btn btn-secondary" type="button" onclick="openModal('modal-defense-import')">Импорт заданий</button>
         </div>
     </div>
 
@@ -225,7 +225,6 @@
                 </form>
             </div>
         </div>
-        </div>
     </div>
 </dialog>
 
@@ -234,7 +233,7 @@
 <!-- Диалог импорта CSV -->
 <dialog id="modal-defense-import" class="modal">
     <div class="modal-header">
-        <h2 class="modal-title">Импорт заданий (CSV)</h2>
+        <h2 class="modal-title">Импорт заданий</h2>
         <button class="modal-close" type="button" onclick="closeModal('modal-defense-import')">✕</button>
     </div>
     <div class="modal-body">