feat: добавил личные уведомления для пользователей

Реализовал хранение, получение и отметку прочитанными пользовательских уведомлений. Обновил фронтенд для отображения и управления уведомлениями в профиле студента.

frontend/src/api/index.ts

@@ -16,6 +16,7 @@ import type {
   UserAchievementDto,
   UserDto,
   UserQuery,
+  UserNotificationDto,
   UserStatsDto,
 } from './types'
 
@@ -85,6 +86,14 @@ export const achievementsApi = {
   },
 }
 
+export const notificationsApi = {
+  async list() {
+    const payload = await apiRequest<PagedResult<UserNotificationDto> | UserNotificationDto[]>('/notifications')
+    return extractItems(payload)
+  },
+  markAllRead: () => apiRequest<void>('/notifications/read-all', { method: 'PATCH' }),
+}
+
 export const reviewsApi = {
   create: (lectureId: string | number, rating: 'Like' | 'Neutral' | 'Dislike', text: string) =>
     apiRequest<ReviewDto>('/reviews', {

frontend/src/api/mappers.ts

@@ -1,4 +1,4 @@
-import type { Achievement, CoinTransaction, Lecture, Review, User, UserRole } from '@/types'
+import type { Achievement, CoinTransaction, Lecture, Notification, Review, User, UserRole } from '@/types'
 import type {
   AchievementDto,
   CoinTransactionDto,
@@ -8,6 +8,7 @@ import type {
   UserDto,
   UserStatsDto,
   UserAchievementDto,
+  UserNotificationDto,
 } from './types'
 
 export function mapApiRole(role: string | undefined): UserRole {
@@ -127,3 +128,14 @@ export function mapApiCoinTransaction(transaction: CoinTransactionDto): CoinTran
     type: transaction.amount >= 0 ? 'earned' : 'spent',
   }
 }
+
+export function mapApiNotification(notification: UserNotificationDto): Notification {
+  return {
+    id: String(notification.id),
+    type: notification.type,
+    title: notification.title,
+    body: notification.body,
+    read: notification.isRead,
+    createdAt: notification.createdAt,
+  }
+}

frontend/src/api/types.ts

@@ -185,6 +185,15 @@ export interface CoinTransactionDto {
   createdAt: string
 }
 
+export interface UserNotificationDto {
+  id: number
+  type: 'reminder' | 'schedule-change' | 'achievement' | 'coins' | 'recommendation'
+  title: string
+  body: string
+  isRead: boolean
+  createdAt: string
+}
+
 export interface LectureQuery {
   DateFrom?: string
   DateTo?: string