Defense: sync admin/student timers from server every 10s; toasts with ready reason; live eye counter

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

@@ -94,7 +94,7 @@
             </form>
         </th:block>
         <div th:if="${defense != null and defense.status == 'started'}">
-            <p class="text-sm defense-timer" th:data-seconds="${defense.secondsLeft}"></p>
+            <p class="text-sm defense-timer" th:attr="data-seconds=${defense.secondsLeft},data-lab=${lab.id}"></p>
             <h3 class="group-title">Ваше индивидуальное задание</h3>
             <div class="md-body" th:utext="${defense.assignmentHtml}"></div>
             <form class="mt-4" th:action="'/student/defenses/' + ${defense.id} + '/finish?labId=' + ${lab.id}" method="post">