fix: polish attestation columns and inline grading

- use numeric semesters 1–8 and add show/hide publication per attestation
- edit attestation results directly in the group table without a modal
- hide unpublished attestations from students
- align header separators, average column and action buttons with the existing UI
- remove missed-hours fields until a separate attendance model is ready

web/src/main/resources/templates/fragments/base.html

@@ -17,7 +17,7 @@
     <!-- v=37: сброс кэша стилей после изменения геометрии; при изменении css поднимать версию -->
     <link rel="stylesheet" th:href="@{/css/bootstrap.min.css}">
     <link rel="stylesheet" th:href="@{/css/bootstrap-icons.min.css}">
-        <link rel="stylesheet" th:href="@{/css/app.css(v='38')}">
+        <link rel="stylesheet" th:href="@{/css/app.css(v='39')}">
     <link id="hljs-light" rel="stylesheet" th:href="@{/css/hljs-github.css(v='36')}">
     <link id="hljs-dark" rel="stylesheet" th:href="@{/css/hljs-github-dark.css(v='36')}" disabled>
     <script th:src="@{/js/highlight.min.js(v='36')}" defer></script>
@@ -25,7 +25,7 @@
     <script th:src="@{/js/tablekit.js(v='38')}" defer></script>
     <script th:src="@{/js/bootstrap.bundle.min.js}" defer></script>
     <script th:src="@{/js/theme-init.js(v='36')}"></script>
-    <script th:src="@{/js/app.js(v='39')}" defer></script>
+    <script th:src="@{/js/app.js(v='40')}" defer></script>
     <script th:src="@{/js/ui-state.js(v='36')}" defer></script>
     <script th:src="@{/js/form-feedback.js(v='39')}" defer></script>
     <script th:src="@{/js/modal-ajax.js(v='1')}" defer></script>