feat: general lab comment and strict square UI

Add a non-required general comment for a student's lab grade (progress V9, API, admin modal, student card). Empty string is the default. Switch the UI to square corners and bump static asset versions.

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

@@ -57,6 +57,10 @@
         <h2 class="section-title">Оценка и комментарии</h2>
         <div class="card card-body mb-6">
             <p class="mb-4 mt-1">Ваша оценка за лабораторную: <span class="score-big" th:text="${grade}"></span></p>
+            <div th:if="${!#strings.isEmpty(generalComment)}" class="general-comment">
+                <h3 class="group-title">Общий комментарий по лабораторной</h3>
+                <p class="pre-wrap mb-4" th:text="${generalComment}">—</p>
+            </div>
             <div class="review-cols">
                 <div class="review-col" th:if="${!#lists.isEmpty(commentsPositive)}">
                     <h3 class="group-title tone-positive-text">Позитивный</h3>
@@ -107,7 +111,7 @@
             <p class="text-sm text-muted">Ожидайте преподавателя с проверкой.</p>
         </div>
     </div>
-<script th:src="@{/js/defense-timer.js(v='34')}" defer></script>
+<script th:src="@{/js/defense-timer.js(v='35')}" defer></script>
 </div>
 </body>
 </html>