fix: небольшие фиксы фронта

frontend/src/views/student/NotificationsView.vue

@@ -70,6 +70,7 @@ const typeIcon: Record<string, string> = {
   min-height: calc(100vh - var(--topbar-height) - 28px - 80px);
 }
 .header { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
+.header .page-title { margin-bottom: 0; }
 .notification-groups { display: flex; flex-direction: column; gap: 14px; }
 .group-title { font-weight: 700; margin-bottom: 10px; }
 .items { display: flex; flex-direction: column; gap: 10px; }