refactor: убрал отображение роли пользователя в топбаре

frontend/src/components/layout/AppTopbar.vue

@@ -13,12 +13,6 @@ const userStore = useUserStore()
 const router = useRouter()
 const searchQuery = ref('')
 
-const roleLabels: Record<string, string> = {
-  student: 'Студент',
-  teacher: 'Преподаватель',
-  admin: 'Администратор',
-}
-
 const unreadCount = computed(() => userStore.unreadCount())
 
 function openProfile() {
@@ -40,10 +34,6 @@ function openProfile() {
     <div class="topbar-right">
       <CoinChip v-if="auth.user" :amount="auth.user.coins" />
 
-      <span class="role-chip" v-if="auth.user">
-        {{ roleLabels[auth.user.activeRole] }}
-      </span>
-
       <button class="notif-btn" @click="$router.push('/notifications')">
         <AppIcon icon="bell" :size="18" />
         <span class="notif-dot" v-if="auth.user && unreadCount > 0">
@@ -108,16 +98,6 @@ function openProfile() {
   gap: 12px;
   flex-shrink: 0;
 }
-.role-chip {
-  background: rgba(34,197,94,0.12);
-  border: 1px solid rgba(34,197,94,0.3);
-  border-radius: var(--radius-sm);
-  padding: 5px 10px;
-  font-size: 12px;
-  font-weight: 600;
-  color: var(--color-primary-dark);  
-  white-space: nowrap;
-}
 .notif-btn {
   position: relative;
   background: none;
@@ -163,6 +143,5 @@ function openProfile() {
   .topbar-center { display: none; }
   .brand-name { display: none; }
   .avatar-name { display: none; }
-  .role-chip { display: none; }
 }
 </style>