chore(deps): update dependency microsoft.aspnetcore.authentication.jwtbearer to 10.0.8

Reviewed-on: #11

.env.example

@@ -0,0 +1,40 @@
+# Postgre
+POSTGRES_USER=universe
+POSTGRES_PASSWORD=
+POSTGRES_DATABASE=universe
+
+# Azure AD
+AzureAd_Instance=https://login.microsoftonline.com/
+AzureAd_TenantId=sfedu.ru
+AzureAd_ClientId=
+AzureAd_ClientSecret=
+AzureAd_Domain=sfedu.onmicrosoft.com
+AzureAd_CallbackPath=/signin-oidc
+
+# JWT
+JWT_SECRET=
+JWT_ISSUER=UniVerse
+JWT_AUDIENCE=UniVerse
+JWT_ACCESS_TOKEN_EXPIRATION_MINUTES=30
+JWT_REFRESH_TOKEN_EXPIRATION_DAYS=30
+
+# CORS
+CORS_ALLOWED_ORIGINS=http://localhost:3000
+
+# LLM
+LLM_BASE_URL=
+LLM_API_KEY=
+LLM_MODEL=
+
+# Modeus API
+MODEUS_API_BASE_URL=
+MODEUS_API_KEY=
+
+# Email SMTP
+EMAIL_SMTP_HOST=
+EMAIL_SMTP_PORT=587
+EMAIL_SMTP_ENABLE_SSL=true
+EMAIL_SMTP_USERNAME=
+EMAIL_SMTP_PASSWORD=
+EMAIL_SMTP_FROM_ADDRESS=no-reply@universe.local
+EMAIL_SMTP_FROM_NAME=UniVerse

.gitea/workflows/backend-ci.yml

@@ -0,0 +1,33 @@
+name: Backend CI
+
+on:
+  push:
+    branches: [ "main", "dev" ]
+    paths:
+      - 'backend/**'
+  pull_request:
+    branches: [ "main", "dev" ]
+    paths:
+      - 'backend/**'
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '10.0.x'
+
+    - name: Restore dependencies
+      run: dotnet restore backend/UniVerse.sln
+
+    - name: Build
+      run: dotnet build backend/UniVerse.sln --no-restore --configuration Release
+
+    - name: Test
+      run: dotnet test backend/UniVerse.sln --no-build --configuration Release --verbosity normal

.gitea/workflows/frontend-ci.yml

@@ -0,0 +1,63 @@
+name: Frontend CI
+
+on:
+  push:
+    branches: [ "main", "dev" ]
+    paths:
+      - 'frontend/**'
+  pull_request:
+    branches: [ "main", "dev" ]
+    paths:
+      - 'frontend/**'
+
+jobs:
+  build-and-check:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: frontend
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Setup pnpm
+      uses: pnpm/action-setup@v4
+      with:
+        version: 10
+        run_install: false
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '22.x'
+        cache: pnpm
+        cache-dependency-path: frontend/pnpm-lock.yaml
+
+    - name: Install dependencies
+      run: pnpm install --frozen-lockfile
+
+    - name: Audit dependencies
+      if: always()
+      run: pnpm audit --audit-level moderate
+
+    - name: Check formatting
+      if: always()
+      run: pnpm exec prettier --check src/
+
+    - name: Lint with oxlint
+      if: always()
+      run: pnpm exec oxlint .
+
+    - name: Lint with ESLint
+      if: always()
+      run: pnpm exec eslint . --max-warnings=0
+
+    - name: Type check
+      if: always()
+      run: pnpm run type-check
+
+    - name: Build
+      if: always()
+      run: pnpm run build-only

.gitea/workflows/gitea-push-docker.yml

@@ -1,17 +1,48 @@
-name: Create and publish a Docker image
+name: 🚀 Create and publish a Docker image
 
 on:
   push:
-    branches: ['main', 'staging']
+    branches: ['main', 'dev']
 
 env:
-  CONTEXT: ./backend
+  BACKEND_PATH: backend
+  FRONTEND_PATH: frontend
+  SERVER_DOMAIN: ${{ gitea.server_url.replace('https://', '') }}
 
 jobs:
-  build-and-push-image:
+  detect-changes:
     runs-on: ubuntu-latest
-    name: Publish image
+    name: Detect changes in backend and frontend
     container: catthehacker/ubuntu:act-latest
+    outputs:
+      backend_changed: ${{ steps.backend-changed.outputs.backend }}
+      frontend_changed: ${{ steps.frontend-changed.outputs.frontend }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Check for backend changes
+        id: backend-changed
+        uses: dorny/paths-filter@v2
+        with:
+          filters: |
+            backend:
+              - '${{ env.BACKEND_PATH }}/**'
+
+      - name: Check for frontend changes
+        id: frontend-changed
+        uses: dorny/paths-filter@v2
+        with:
+          filters: |
+            frontend:
+              - '${{ env.FRONTEND_PATH }}/**'
+
+  backend:
+    runs-on: ubuntu-latest
+    name: Build & publish backend image
+    container: catthehacker/ubuntu:act-latest
+    needs: [detect-changes]
+    if: ${{ needs.detect-changes.outputs.backend_changed == 'true' }}
     permissions:
       contents: read
       packages: write
@@ -24,17 +55,69 @@ jobs:
         id: meta
         uses: https://github.com/docker/metadata-action@v4
         with:
-          images: ${{ vars.SERVER_DOMAIN }}/${{ gitea.repository }}
-      - name: Build an image from Dockerfile
-        run: |
-          cd ${{ env.CONTEXT }} &&
-          docker build -f UniVerse.Api/Dockerfile -t ${{ steps.meta.outputs.tags }} .
+          images: ${{ vars.SERVER_DOMAIN }}/${{ gitea.repository }}/backend
+
       - name: Log in to the Container registry
         uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
         with:
           registry: ${{ vars.SERVER_DOMAIN }}
           username: ${{ gitea.actor }}
           password: ${{ secrets.TOKEN }}
-      - name: Push
-        run: |
-          docker push '${{ steps.meta.outputs.tags }}'
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: ./${{ env.BACKEND_PATH }}
+          file: ./${{ env.BACKEND_PATH }}/UniVerse.Api/Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+  frontend:
+    runs-on: ubuntu-latest
+    name: Build & publish frontend image
+    container: catthehacker/ubuntu:act-latest
+    needs: [detect-changes]
+    if: ${{ needs.detect-changes.outputs.frontend_changed == 'true' }}
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ vars.SERVER_DOMAIN }}
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: https://github.com/docker/metadata-action@v4
+        with:
+          images: ${{ vars.SERVER_DOMAIN }}/${{ gitea.repository }}/frontend
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: ./${{ env.FRONTEND_PATH }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: [frontend, backend]
+    # always() - костыль для того, чтобы деплой выполнялся даже если один из билдов пропущен
+    if: github.ref == 'refs/heads/dev' && always() && (needs.backend.result == 'success' || needs.frontend.result == 'success')
+    name: Update stack on Portainer
+    steps:
+      - name: Deploy Stage
+        uses: fjogeleit/http-request-action@v1
+        with:
+          url: ${{ secrets.PORTAINER_WEBHOOK_URL }}
+          method: 'POST'
+          ignoreSsl: true
+          timeout: 60000

.gitignore

@@ -141,6 +141,7 @@ $RECYCLE.BIN/
 # Icon must end with two \r
 Icon
 
+
 # Thumbnails
 ._*
 
@@ -160,3 +161,4 @@ Network Trash Folder
 Temporary Items
 .apdisk
 
+backend/UniVerse.Api/appsettings.Development.json

README.md

@@ -2,6 +2,9 @@
 
 UniVerse — backend (ASP.NET Core) для университетской платформы расписания, лекций, отзывов и геймификации.
 
+[Документация API](backend/UniVerse.Api/openapi.json)  
+[Документация бекнда](docs/backend.md)  
+
 ## Что внутри
 
 - Расписание/события и сущности: курсы, лекции, аудитории (locations)
@@ -101,9 +104,13 @@ docker run --rm -p 8080:8080 \
 ## Аутентификация
 
 - `POST /api/v1/auth/login/dev` — дев-логин (только в `Development`). Удобно для локальной разработки.
-- `POST /api/v1/auth/login/microsoft` — заготовка под Microsoft Entra ID (сейчас не реализовано).
+- `GET /api/v1/auth/login/microsoft` — старт входа через Microsoft Entra ID (бэкенд сам делает редирект на Microsoft).
+- `GET /api/v1/auth/callback/microsoft` — callback, куда Microsoft возвращает `code`.
+- `POST /api/v1/auth/login/microsoft` — обмен `authorizationCode` на токены (полезно для интеграций/ручных тестов). Тело: `{ "authorizationCode": "...", "redirectUri"?: "..." }`.
 - `POST /api/v1/auth/refresh`, `POST /api/v1/auth/logout`, `GET /api/v1/auth/me`
 
+Для Microsoft Entra ID нужны настройки (через env или appsettings): `AzureAd:TenantId`, `AzureAd:ClientId`, `AzureAd:ClientSecret` (и при необходимости `AzureAd:Instance`, `AzureAd:RedirectUri`, `AzureAd:PostLoginRedirectUri`).
+
 Большинство методов API защищены `[Authorize]`.
 
 ## Фоновый LLM-анализ отзывов
@@ -140,3 +147,19 @@ LLM-ключ задаётся через `Llm:ApiKey`.
 
 Точные схемы запросов/ответов удобнее смотреть в Swagger.
 
+## Тестирование
+
+В проекте настроено модульное и интеграционное тестирование (папка `backend/UniVerse.Api.Tests`):
+
+- **xUnit** в качестве основного фреймворка для тестирования.
+- **NSubstitute** для создания заглушек (моков) зависимостей сервисов.
+- Используется `WebApplicationFactory` (`ApiWebApplicationFactory.cs`) для поднятия интеграционного тестового сервера с подменой БД на `InMemory` и отключенными фоновыми сервисами (например, LLM-интеграциями) для изоляции.
+- Реализованы полные тесты ролевой модели и авторизации (`EndpointAuthorizationTests.cs`), надежно проверяющие все API-конечные точки на политики доступа от имени различных ролей (`Admin`, `Teacher`, `Student`, `Anonymous`).
+
+Запуск тестов:
+
+```bash
+cd backend
+dotnet test
+```
+

backend/.idea/.idea.UniVerse/.idea/.name

@@ -0,0 +1 @@
+UniVerse

backend/.idea/.idea.UniVerse/.idea/indexLayout.xml

@@ -1,7 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="UserContentModel">
-    <attachedFolders />
+    <attachedFolders>
+      <Path>../frontend</Path>
+    </attachedFolders>
     <explicitIncludes />
     <explicitExcludes />
   </component>

backend/.idea/.idea.UniVerse/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

backend/Directory.Build.props

@@ -0,0 +1,6 @@
+<Project>
+  <PropertyGroup>
+    <BuildInParallel>false</BuildInParallel>
+    <RestoreUseStaticGraphEvaluation>true</RestoreUseStaticGraphEvaluation>
+  </PropertyGroup>
+</Project>

backend/UniVerse.Api.Tests/Auth/AuthServiceTests.cs

@@ -0,0 +1,138 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging.Abstractions;
+using NSubstitute;
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Entities;
+using UniVerse.Domain.Enums;
+using UniVerse.Domain.Exceptions;
+using UniVerse.Infrastructure.Data;
+using UniVerse.Infrastructure.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Auth;
+
+public class AuthServiceTests
+{
+    [Fact]
+    public async Task RefreshTokenAsync_InactiveUser_RevokesTokenAndThrowsForbidden()
+    {
+        await using var db = CreateDbContext();
+        db.Users.Add(new User
+        {
+            Id = 1,
+            Email = "blocked@test.local",
+            IsActive = false,
+            Roles = [new UserRoleAssignment { UserId = 1, Role = UserRole.Student }]
+        });
+        db.RefreshTokens.Add(new RefreshToken
+        {
+            Id = 1,
+            UserId = 1,
+            Token = "refresh-token",
+            ExpiresAt = DateTime.UtcNow.AddDays(1),
+            CreatedAt = DateTime.UtcNow
+        });
+        await db.SaveChangesAsync();
+        var service = CreateService(db);
+
+        await Assert.ThrowsAsync<ForbiddenException>(() => service.RefreshTokenAsync("refresh-token"));
+
+        var token = await db.RefreshTokens.SingleAsync(t => t.Token == "refresh-token");
+        Assert.NotNull(token.RevokedAt);
+    }
+
+    [Fact]
+    public async Task GetCurrentUserAsync_InactiveUser_ThrowsForbidden()
+    {
+        await using var db = CreateDbContext();
+        db.Users.Add(new User
+        {
+            Id = 1,
+            Email = "blocked@test.local",
+            IsActive = false,
+            Roles = [new UserRoleAssignment { UserId = 1, Role = UserRole.Student }]
+        });
+        await db.SaveChangesAsync();
+        var service = CreateService(db);
+
+        await Assert.ThrowsAsync<ForbiddenException>(() => service.GetCurrentUserAsync(1));
+    }
+
+    [Fact]
+    public async Task LoginWithMicrosoftAsync_LinksScheduleTeacherBySubId()
+    {
+        await using var db = CreateDbContext();
+        db.Users.Add(new User
+        {
+            Id = 10,
+            Email = "modeus-person-1@modeus.local",
+            DisplayName = "Иванов Иван Иванович",
+            MicrosoftId = "sso-sub-1",
+            IsActive = true,
+            Roles = [new UserRoleAssignment { UserId = 10, Role = UserRole.Teacher }],
+            TeacherProfile = new TeacherProfile { UserId = 10, ModeusId = "person-1" }
+        });
+        await db.SaveChangesAsync();
+        var microsoftAuth = Substitute.For<IMicrosoftAuthClient>();
+        microsoftAuth.ExchangeAuthorizationCodeAsync("code", "http://localhost/callback", Arg.Any<CancellationToken>())
+            .Returns(new MicrosoftTokenResult(BuildIdToken("sso-sub-1", "teacher@sfedu.ru", "Иванов Иван Иванович")));
+        var service = CreateService(db, microsoftAuth);
+
+        var result = await service.LoginWithMicrosoftAsync("code", "http://localhost/callback");
+
+        Assert.Equal(10, result.Response.User.Id);
+        Assert.Equal("teacher@sfedu.ru", result.Response.User.Email);
+        Assert.Contains(UserRole.Teacher, result.Response.User.Roles);
+        Assert.Single(await db.Users.ToListAsync());
+        var user = await db.Users.Include(u => u.TeacherProfile).SingleAsync();
+        Assert.Equal("sso-sub-1", user.MicrosoftId);
+        Assert.Equal("person-1", user.TeacherProfile?.ModeusId);
+    }
+
+    private static AppDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseInMemoryDatabase($"AuthServiceTests_{Guid.NewGuid()}")
+            .Options;
+        return new AppDbContext(options);
+    }
+
+    private static AuthService CreateService(AppDbContext db, IMicrosoftAuthClient? microsoftAuth = null)
+    {
+        var config = new ConfigurationBuilder()
+            .AddInMemoryCollection(new Dictionary<string, string?>
+            {
+                ["Jwt:Secret"] = "test-secret-test-secret-test-secret-test-secret",
+                ["Jwt:Issuer"] = "UniVerse.Tests",
+                ["Jwt:Audience"] = "UniVerse.Tests",
+                ["Jwt:AccessTokenExpirationMinutes"] = "15",
+                ["Jwt:RefreshTokenExpirationDays"] = "30"
+            })
+            .Build();
+
+        var gamification = Substitute.For<IGamificationService>();
+        gamification.CalculateLevelAsync(Arg.Any<int>()).Returns(1);
+
+        var notifications = Substitute.For<INotificationService>();
+        notifications.SendAsync(Arg.Any<NotificationMessage>(), Arg.Any<CancellationToken>())
+            .Returns(Task.CompletedTask);
+
+        microsoftAuth ??= Substitute.For<IMicrosoftAuthClient>();
+        return new AuthService(db, config, microsoftAuth, gamification, notifications, NullLogger<AuthService>.Instance);
+    }
+
+    private static string BuildIdToken(string sub, string email, string name)
+    {
+        var token = new JwtSecurityToken(claims:
+        [
+            new Claim(JwtRegisteredClaimNames.Sub, sub),
+            new Claim("preferred_username", email),
+            new Claim("name", name)
+        ]);
+        return new JwtSecurityTokenHandler().WriteToken(token);
+    }
+}

backend/UniVerse.Api.Tests/Authorization/EndpointAuthorizationTests.cs

@@ -0,0 +1,317 @@
+using System.Net;
+using UniVerse.Api.Tests.Helpers;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Authorization;
+
+/// <summary>
+/// Интеграционные тесты для ролевого контроля доступа ко всем конечным точкам API.
+///
+/// Каждый тестовый случай представляет собой кортеж:
+///   (description, method, url, requiredRole, forbiddenRoles[])
+///
+/// Три типа сценариев для каждой конечной точки:
+///   A) Анонимный → 401 Unauthorized
+///   B) Неправильная роль → 403 Forbidden
+///   C) Правильная роль → не 401 / не 403 (зависит от бизнес-логики: успех или доменная ошибка)
+/// </summary>
+public class EndpointAuthorizationTests : IClassFixture<ApiWebApplicationFactory>
+{
+    private readonly HttpClient _client;
+
+    public EndpointAuthorizationTests(ApiWebApplicationFactory factory)
+    {
+        _client = factory.CreateClient();
+    }
+
+    // ─────────────────────────────────────────────────────────────────────────
+    // Тестовые данные
+    // ─────────────────────────────────────────────────────────────────────────
+
+    /// <summary>
+    /// Конечные точки, требующие аутентификации (не анонимные).
+    /// Формат: (description, method, url, correctRole, forbiddenRoles[])
+    ///
+    /// "AnyAuth" означает, что достаточно любого валидного JWT — без ограничения по роли.
+    /// Для конечных точек с несколькими ролями (Admin,Teacher) обе роли указаны как правильные.
+    /// </summary>
+    public static IEnumerable<object[]> AuthenticatedEndpoints()
+    {
+        // ── Auth ─────────────────────────────────────────────────────────────
+        yield return E("auth/logout [AnyAuth]",            "POST",   "api/v1/auth/logout",    "Student");
+        yield return E("auth/me [AnyAuth]",                "GET",    "api/v1/auth/me",        "Student");
+
+        // ── Users — current user ──────────────────────────────────────────────
+        yield return E("users/me GET [AnyAuth]",           "GET",    "api/v1/users/me",       "Student");
+        yield return E("users/me PUT [AnyAuth]",           "PUT",    "api/v1/users/me",       "Student",
+            body: """{"displayName":"Test","avatarUrl":null}""");
+        yield return E("users/me/stats [AnyAuth]",         "GET",    "api/v1/users/me/stats", "Student");
+        yield return E("users/me/enrollments [AnyAuth]",   "GET",    "api/v1/users/me/enrollments", "Student");
+        yield return E("users/me/reviews [AnyAuth]",       "GET",    "api/v1/users/me/reviews", "Student");
+        yield return E("users/me/achievements [AnyAuth]",  "GET",    "api/v1/users/me/achievements", "Student");
+        yield return E("users/me/transactions [AnyAuth]",  "GET",    "api/v1/users/me/transactions", "Student");
+
+        // ── Users — Admin only ────────────────────────────────────────────────
+        yield return E("users GET [Admin]",                "GET",    "api/v1/users",          "Admin",   forbidden: ["Student", "Teacher"]);
+        yield return E("users/{id} GET [Admin]",           "GET",    "api/v1/users/1",        "Admin",   forbidden: ["Student", "Teacher"]);
+        yield return E("users/{id} PUT [Admin]",           "PUT",    "api/v1/users/1",        "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"displayName":"Test","avatarUrl":null}""");
+        yield return E("users/{id}/stats [Admin]",         "GET",    "api/v1/users/1/stats",  "Admin",   forbidden: ["Student", "Teacher"]);
+        yield return E("users/{id}/enrollments [Admin]",   "GET",    "api/v1/users/1/enrollments", "Admin", forbidden: ["Student", "Teacher"]);
+        yield return E("users/{id}/reviews [Admin]",       "GET",    "api/v1/users/1/reviews","Admin",   forbidden: ["Student", "Teacher"]);
+        yield return E("users/{id}/achievements [Admin]",  "GET",    "api/v1/users/1/achievements","Admin", forbidden: ["Student", "Teacher"]);
+        yield return E("users/{id}/transactions [Admin]",  "GET",    "api/v1/users/1/transactions","Admin", forbidden: ["Student", "Teacher"]);
+        yield return E("users/{id}/role PATCH [Admin]",    "PATCH",  "api/v1/users/1/role",   "Admin",   forbidden: ["Student", "Teacher"],
+            body: "\"Student\"");
+        yield return E("users/{id}/active PATCH [Admin]",  "PATCH",  "api/v1/users/1/active", "Admin",   forbidden: ["Student", "Teacher"],
+            body: "true");
+
+        // ── Courses — any auth ────────────────────────────────────────────────
+        yield return E("courses GET [AnyAuth]",            "GET",    "api/v1/courses",        "Student");
+        yield return E("courses/{id} GET [AnyAuth]",       "GET",    "api/v1/courses/1",      "Student");
+
+        // ── Courses — Admin only ──────────────────────────────────────────────
+        yield return E("courses POST [Admin]",             "POST",   "api/v1/courses",        "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"name":"Course","description":null}""");
+        yield return E("courses/{id} PUT [Admin]",         "PUT",    "api/v1/courses/1",      "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"name":"Course","description":null}""");
+        yield return E("courses/{id} DELETE [Admin]",      "DELETE", "api/v1/courses/1",      "Admin",   forbidden: ["Student", "Teacher"]);
+        yield return E("courses/{id}/tags POST [Admin]",   "POST",   "api/v1/courses/1/tags", "Admin",   forbidden: ["Student", "Teacher"],
+            body: "1");
+        yield return E("courses/{id}/tags/{tagId} DELETE [Admin]","DELETE","api/v1/courses/1/tags/1","Admin",forbidden: ["Student", "Teacher"]);
+
+        // ── Lectures — any auth ───────────────────────────────────────────────
+        yield return E("lectures GET [AnyAuth]",           "GET",    "api/v1/lectures",       "Student");
+        yield return E("lectures/{id} GET [AnyAuth]",      "GET",    "api/v1/lectures/1",     "Student");
+
+        // ── Lectures — Admin only ─────────────────────────────────────────────
+        yield return E("lectures POST [Admin]",            "POST",   "api/v1/lectures",       "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"courseId":1,"teacherId":null,"locationId":null,"title":"T","description":null,"format":"Offline","startsAt":"2026-09-01T10:00:00Z","endsAt":"2026-09-01T12:00:00Z","isOpen":true,"maxEnrollments":30,"onlineUrl":null}""");
+        yield return E("lectures/{id} DELETE [Admin]",     "DELETE", "api/v1/lectures/1",     "Admin",   forbidden: ["Student", "Teacher"]);
+
+        // ── Lectures — Admin OR Teacher ───────────────────────────────────────
+        yield return E("lectures/{id} PUT [Admin]",        "PUT",    "api/v1/lectures/1",     "Admin",   forbidden: ["Student"],
+            body: """{"teacherId":null,"locationId":null,"title":"T","description":null,"format":"Offline","startsAt":"2026-09-01T10:00:00Z","endsAt":"2026-09-01T12:00:00Z","isOpen":true,"maxEnrollments":30,"onlineUrl":null}""");
+        yield return E("lectures/{id} PUT [Teacher]",      "PUT",    "api/v1/lectures/1",     "Teacher", forbidden: ["Student"],
+            body: """{"teacherId":null,"locationId":null,"title":"T","description":null,"format":"Offline","startsAt":"2026-09-01T10:00:00Z","endsAt":"2026-09-01T12:00:00Z","isOpen":true,"maxEnrollments":30,"onlineUrl":null}""");
+        yield return E("lectures/{id}/attendance PATCH [Admin]", "PATCH","api/v1/lectures/1/attendance/2","Admin",  forbidden: ["Student"],
+            body: "true");
+        yield return E("lectures/{id}/attendance PATCH [Teacher]","PATCH","api/v1/lectures/1/attendance/2","Teacher",forbidden: ["Student"],
+            body: "true");
+        yield return E("lectures/{id}/enrollments GET [Admin]",  "GET","api/v1/lectures/1/enrollments","Admin",  forbidden: ["Student"]);
+        yield return E("lectures/{id}/enrollments GET [Teacher]","GET","api/v1/lectures/1/enrollments","Teacher",forbidden: ["Student"]);
+        yield return E("lectures/{id}/reviews GET [Admin]",      "GET","api/v1/lectures/1/reviews","Admin",  forbidden: ["Student"]);
+        yield return E("lectures/{id}/reviews GET [Teacher]",    "GET","api/v1/lectures/1/reviews","Teacher",forbidden: ["Student"]);
+
+        // ── Lectures — Student only ───────────────────────────────────────────
+        yield return E("lectures/{id}/enroll POST [Student]",   "POST",  "api/v1/lectures/1/enroll",  "Student", forbidden: ["Admin", "Teacher"]);
+        yield return E("lectures/{id}/enroll DELETE [Student]", "DELETE","api/v1/lectures/1/enroll",  "Student", forbidden: ["Admin", "Teacher"]);
+
+        // ── Reviews — any auth ────────────────────────────────────────────────
+        yield return E("reviews/{id} PUT [AnyAuth]",       "PUT",    "api/v1/reviews/1",      "Student",
+            body: """{"rating":"Like","text":"Updated"}""");
+        yield return E("reviews/{id} DELETE [AnyAuth]",    "DELETE", "api/v1/reviews/1",      "Student");
+
+        // ── Reviews — Admin OR Teacher ───────────────────────────────────────
+        yield return E("reviews/{id} GET [Admin]",         "GET",    "api/v1/reviews/1",      "Admin",   forbidden: ["Student"]);
+        yield return E("reviews/{id} GET [Teacher]",       "GET",    "api/v1/reviews/1",      "Teacher", forbidden: ["Student"]);
+
+        // ── Reviews — Student only ────────────────────────────────────────────
+        yield return E("reviews POST [Student]",           "POST",   "api/v1/reviews",        "Student", forbidden: ["Admin", "Teacher"],
+            body: """{"lectureId":1,"rating":"Like","text":"Great lecture!"}""");
+
+        // ── Reviews — Admin only ──────────────────────────────────────────────
+        yield return E("reviews GET [Admin]",             "GET",    "api/v1/reviews",        "Admin", forbidden: ["Student", "Teacher"]);
+        yield return E("reviews/llm-prompt GET [Admin]",  "GET",    "api/v1/reviews/llm-prompt","Admin", forbidden: ["Student", "Teacher"]);
+        yield return E("reviews/llm-prompt PUT [Admin]",  "PUT",    "api/v1/reviews/llm-prompt","Admin", forbidden: ["Student", "Teacher"],
+            body: """{"prompt":"Analyze {lectureContext}. Review: {reviewText}"}""");
+        yield return E("reviews/{id}/reanalyze POST [Admin]","POST", "api/v1/reviews/1/reanalyze","Admin",forbidden: ["Student", "Teacher"]);
+
+        // ── Tags — any auth ───────────────────────────────────────────────────
+        yield return E("tags GET [AnyAuth]",               "GET",    "api/v1/tags",           "Student");
+        yield return E("tags/{id} GET [AnyAuth]",          "GET",    "api/v1/tags/1",         "Student");
+        yield return E("tags/tree GET [AnyAuth]",          "GET",    "api/v1/tags/tree",      "Student");
+
+        // ── Tags — Admin only ─────────────────────────────────────────────────
+        yield return E("tags POST [Admin]",                "POST",   "api/v1/tags",           "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"name":"Tag","type":"Topic","parentId":null}""");
+        yield return E("tags/{id} PUT [Admin]",            "PUT",    "api/v1/tags/1",         "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"name":"Tag","type":"Topic","parentId":null}""");
+        yield return E("tags/{id} DELETE [Admin]",         "DELETE", "api/v1/tags/1",         "Admin",   forbidden: ["Student", "Teacher"]);
+
+        // ── Locations — any auth ──────────────────────────────────────────────
+        yield return E("locations GET [AnyAuth]",          "GET",    "api/v1/locations",      "Student");
+        yield return E("locations/{id} GET [AnyAuth]",     "GET",    "api/v1/locations/1",    "Student");
+
+        // ── Locations — Admin only ────────────────────────────────────────────
+        yield return E("locations POST [Admin]",           "POST",   "api/v1/locations",      "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"name":"Room 1","building":null,"room":null,"address":null}""");
+        yield return E("locations/{id} PUT [Admin]",       "PUT",    "api/v1/locations/1",    "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"name":"Room 1","building":null,"room":null,"address":null}""");
+        yield return E("locations/{id} DELETE [Admin]",    "DELETE", "api/v1/locations/1",    "Admin",   forbidden: ["Student", "Teacher"]);
+
+        // ── Achievements — any auth ───────────────────────────────────────────
+        yield return E("achievements GET [AnyAuth]",       "GET",    "api/v1/achievements",   "Student");
+        yield return E("achievements/{id} GET [AnyAuth]",  "GET",    "api/v1/achievements/1", "Student");
+
+        // ── Achievements — Admin only ─────────────────────────────────────────
+        yield return E("achievements POST [Admin]",        "POST",   "api/v1/achievements",   "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"name":"Ach","description":null,"iconUrl":null,"xpReward":10,"coinReward":5,"condition":null}""");
+        yield return E("achievements/{id} PUT [Admin]",    "PUT",    "api/v1/achievements/1", "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"name":"Ach","description":null,"iconUrl":null,"xpReward":10,"coinReward":5,"condition":null}""");
+        yield return E("achievements/{id} DELETE [Admin]", "DELETE", "api/v1/achievements/1", "Admin",   forbidden: ["Student", "Teacher"]);
+
+        // ── Sync — Admin only ─────────────────────────────────────────────────
+        yield return E("sync/schedule POST [Admin]",       "POST",   "api/v1/sync/schedule",  "Admin",   forbidden: ["Student", "Teacher"],
+            body: """{"specialtyCode":null,"timeMin":null,"timeMax":null,"typeId":null}""");
+        yield return E("sync/status GET [Admin]",          "GET",    "api/v1/sync/status",    "Admin",   forbidden: ["Student", "Teacher"]);
+        yield return E("sync/rooms POST [Admin]",          "POST",   "api/v1/sync/rooms",     "Admin",   forbidden: ["Student", "Teacher"]);
+        yield return E("sync/employees POST [Admin]",      "POST",   "api/v1/sync/employees?fullname=test","Admin",forbidden: ["Student", "Teacher"]);
+
+        // ── Notifications — any auth ───────────────────────────────────────────
+        yield return E("notifications GET [AnyAuth]", "GET", "api/v1/notifications", "Student");
+        yield return E("notifications/read-all PATCH [AnyAuth]", "PATCH", "api/v1/notifications/read-all", "Student");
+
+        // ── Notifications — Admin only ─────────────────────────────────────────
+        yield return E("notifications/send POST [Admin]",  "POST",   "api/v1/notifications/send", "Admin", forbidden: ["Student", "Teacher"],
+            body: """{"channel":"email","recipient":"user@test.com","subject":"Test","body":"Hello"}""");
+        yield return E("notifications/schedule POST [Admin]", "POST", "api/v1/notifications/schedule", "Admin", forbidden: ["Student", "Teacher"],
+            body: $$"""{"channel":"email","recipient":"user@test.com","subject":"Test","body":"Hello","sendAt":"{{DateTimeOffset.UtcNow.AddMinutes(5):O}}"}""");
+    }
+
+    /// <summary>
+    /// Анонимные конечные точки — запросы без токена НЕ должны возвращать 401.
+    /// (они могут делать перенаправление или возвращать 500 из-за отсутствия конфигурации, но не 401)
+    /// </summary>
+    public static IEnumerable<object[]> AnonymousEndpoints()
+    {
+        // login/microsoft GET перенаправляет на Microsoft — AzureAd настроен в фабрике
+        yield return new object[] { "auth/login/microsoft GET", "GET", "api/v1/auth/login/microsoft" };
+        // callback разрешает анонимный доступ — возвращает 400, если отсутствует параметр code
+        yield return new object[] { "auth/callback/microsoft GET", "GET", "api/v1/auth/callback/microsoft" };
+        // dev login доступен в окружении Development
+        yield return new object[] { "auth/login/dev POST", "POST", "api/v1/auth/login/dev",
+            """{"email":"test@test.com","displayName":"Test","role":"Student"}""" };
+        // refresh читает из cookie — возвращает 401, если нет cookie, но это не 401 от промежуточного ПО авторизации
+        // (он возвращает 401 явно в теле действия, что отличается от Auth Challenge)
+        // Мы тестируем это отдельно, чтобы убедиться, что заголовок JWT не требуется
+    }
+
+    // ─────────────────────────────────────────────────────────────────────────
+    // Тест: анонимный → 401
+    // ─────────────────────────────────────────────────────────────────────────
+
+    [Theory]
+    [MemberData(nameof(AuthenticatedEndpoints))]
+    public async Task Endpoint_Anonymous_Returns401(
+        string description, string method, string url,
+        string correctRole, string[] forbiddenRoles, string? body)
+    {
+        // Подготовка — без заголовка аутентификации
+        var request = BuildRequest(method, url, body, authHeader: null);
+
+        // Действие
+        var response = await _client.SendAsync(request);
+
+        // Проверка
+        Assert.True(
+            response.StatusCode == HttpStatusCode.Unauthorized,
+            $"[{description}] Ожидался ответ 401 Unauthorized для анонимного запроса, получено {(int)response.StatusCode} {response.StatusCode}");
+    }
+
+    // ─────────────────────────────────────────────────────────────────────────
+    // Тест: неправильная роль → 403
+    // ─────────────────────────────────────────────────────────────────────────
+
+    [Theory]
+    [MemberData(nameof(AuthenticatedEndpoints))]
+    public async Task Endpoint_WrongRole_Returns403(
+        string description, string method, string url,
+        string correctRole, string[] forbiddenRoles, string? body)
+    {
+        foreach (var forbidden in forbiddenRoles)
+        {
+            // Подготовка
+            var request = BuildRequest(method, url, body,
+                authHeader: TestJwtFactory.BearerHeader(forbidden));
+
+            // Действие
+            var response = await _client.SendAsync(request);
+
+            // Проверка
+            Assert.True(
+                response.StatusCode == HttpStatusCode.Forbidden,
+                $"[{description}] Ожидался ответ 403 Forbidden для роли '{forbidden}', получено {(int)response.StatusCode} {response.StatusCode}");
+        }
+    }
+
+    // ─────────────────────────────────────────────────────────────────────────
+    // Тест: правильная роль → не 401 и не 403
+    // ─────────────────────────────────────────────────────────────────────────
+
+    [Theory]
+    [MemberData(nameof(AuthenticatedEndpoints))]
+    public async Task Endpoint_CorrectRole_PassesAuthz(
+        string description, string method, string url,
+        string correctRole, string[] forbiddenRoles, string? body)
+    {
+        // Подготовка
+        var request = BuildRequest(method, url, body,
+            authHeader: TestJwtFactory.BearerHeader(correctRole));
+
+        // Действие
+        var response = await _client.SendAsync(request);
+
+        // Проверка — принимается любой ответ, который НЕ 401/403
+        Assert.True(
+            response.StatusCode != HttpStatusCode.Unauthorized &&
+            response.StatusCode != HttpStatusCode.Forbidden,
+            $"[{description}] Роль '{correctRole}' должна успешно пройти авторизацию, получено {(int)response.StatusCode} {response.StatusCode}");
+    }
+
+    // ─────────────────────────────────────────────────────────────────────────
+    // Тест: анонимные конечные точки не должны возвращать 401
+    // ─────────────────────────────────────────────────────────────────────────
+
+    [Theory]
+    [MemberData(nameof(AnonymousEndpoints))]
+    public async Task AnonymousEndpoint_NoToken_DoesNotReturn401(
+        string description, string method, string url, string? body = null)
+    {
+        var request = BuildRequest(method, url, body, authHeader: null);
+        var response = await _client.SendAsync(request);
+
+        Assert.True(
+            response.StatusCode != HttpStatusCode.Unauthorized,
+            $"[{description}] Анонимная конечная точка не должна возвращать 401, получено {(int)response.StatusCode} {response.StatusCode}");
+    }
+
+    // ─────────────────────────────────────────────────────────────────────────
+    // Вспомогательные методы
+    // ─────────────────────────────────────────────────────────────────────────
+
+    private static HttpRequestMessage BuildRequest(
+        string method, string url, string? body, string? authHeader)
+    {
+        var request = new HttpRequestMessage(new HttpMethod(method), url);
+
+        if (authHeader != null)
+            request.Headers.Add("Authorization", authHeader);
+
+        if (body != null)
+            request.Content = new StringContent(body,
+                System.Text.Encoding.UTF8, "application/json");
+
+        return request;
+    }
+
+    /// <summary>Вспомогательный метод для компактного создания массивов объектов [MemberData].</summary>
+    private static object[] E(
+        string description,
+        string method,
+        string url,
+        string correctRole,
+        string[]? forbidden = null,
+        string? body = null)
+        => [description, method, url, correctRole, forbidden ?? [], body];
+}

backend/UniVerse.Api.Tests/Gamification/GamificationServiceTests.cs

@@ -0,0 +1,183 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging.Abstractions;
+using NSubstitute;
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Entities;
+using UniVerse.Domain.Enums;
+using UniVerse.Infrastructure.Data;
+using UniVerse.Infrastructure.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Gamification;
+
+public class GamificationServiceTests
+{
+    [Fact]
+    public async Task CheckAndAwardAchievementsAsync_AwardsModernConditionsOnce()
+    {
+        await using var db = CreateDbContext();
+        SeedLevelThresholds(db);
+        var service = CreateService(db);
+
+        db.Users.Add(new User
+        {
+            Id = 1,
+            Email = "student@test.local",
+            DisplayName = "Student",
+            AvatarUrl = "avatar.png",
+            Xp = 100,
+            Coins = 510
+        });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(new Lecture
+        {
+            Id = 1,
+            CourseId = 1,
+            Title = "Future lecture",
+            StartsAt = DateTime.UtcNow.AddDays(1),
+            EndsAt = DateTime.UtcNow.AddDays(1).AddHours(2),
+            IsOpen = true
+        });
+        db.LectureEnrollments.Add(new LectureEnrollment { UserId = 1, LectureId = 1 });
+        db.Reviews.AddRange(
+            new Review { Id = 1, UserId = 1, LectureId = 1, Rating = ReviewRating.Like },
+            new Review { Id = 2, UserId = 1, LectureId = 1, Rating = ReviewRating.Neutral },
+            new Review { Id = 3, UserId = 1, LectureId = 1, Rating = ReviewRating.Dislike });
+        db.CoinTransactions.Add(new CoinTransaction
+        {
+            UserId = 1,
+            Amount = 510,
+            Type = CoinTransactionType.AdminAdjustment,
+            Description = "Initial coins"
+        });
+        db.Achievements.AddRange(
+            Achievement(1001, "First activity", "first_activity:1", 10),
+            Achievement(1002, "Reviews", "reviews_written:3", 20),
+            Achievement(1003, "Active registrations", "active_registrations:1", 30),
+            Achievement(1004, "Coins earned", "coins_earned:500", 40),
+            Achievement(1005, "Level reached", "level_reached:2", 50),
+            Achievement(1006, "Profile completed", "profile_completed:1", 60),
+            Achievement(1007, "Old condition", "reviews_1", 100));
+        await db.SaveChangesAsync();
+
+        await service.CheckAndAwardAchievementsAsync(1);
+        await service.CheckAndAwardAchievementsAsync(1);
+
+        var user = await db.Users.FindAsync(1);
+        Assert.NotNull(user);
+        Assert.Equal(720, user!.Coins);
+        Assert.Equal(310, user.Xp);
+        Assert.Equal(6, await db.UserAchievements.CountAsync(ua => ua.UserId == 1));
+        Assert.False(await db.UserAchievements.AnyAsync(ua => ua.AchievementId == 1007));
+        Assert.Equal(6, await db.CoinTransactions.CountAsync(ct =>
+            ct.UserId == 1 && ct.Type == CoinTransactionType.AchievementReward));
+    }
+
+    [Fact]
+    public async Task CheckAndAwardAchievementsAsync_CountsConsecutiveIsoWeeksAcrossYears()
+    {
+        await using var db = CreateDbContext();
+        SeedLevelThresholds(db);
+        var service = CreateService(db);
+
+        db.Users.Add(new User { Id = 1, Email = "student@test.local" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.AddRange(
+            Lecture(1, new DateTime(2025, 12, 29, 10, 0, 0, DateTimeKind.Utc)),
+            Lecture(2, new DateTime(2026, 1, 5, 10, 0, 0, DateTimeKind.Utc)),
+            Lecture(3, new DateTime(2026, 1, 12, 10, 0, 0, DateTimeKind.Utc)));
+        db.LectureEnrollments.AddRange(
+            new LectureEnrollment { UserId = 1, LectureId = 1, Attended = true },
+            new LectureEnrollment { UserId = 1, LectureId = 2, Attended = true },
+            new LectureEnrollment { UserId = 1, LectureId = 3, Attended = true });
+        db.Achievements.Add(Achievement(1001, "Streak", "attendance_streak_weeks:3", 10));
+        await db.SaveChangesAsync();
+
+        await service.CheckAndAwardAchievementsAsync(1);
+
+        Assert.True(await db.UserAchievements.AnyAsync(ua => ua.UserId == 1 && ua.AchievementId == 1001));
+    }
+
+    [Theory]
+    [InlineData(0, 1)]
+    [InlineData(99, 1)]
+    [InlineData(100, 2)]
+    [InlineData(299, 2)]
+    [InlineData(300, 3)]
+    public async Task CalculateLevelAsync_UsesDatabaseThresholds(int xp, int expectedLevel)
+    {
+        await using var db = CreateDbContext();
+        SeedLevelThresholds(db);
+        var service = CreateService(db);
+
+        var level = await service.CalculateLevelAsync(xp);
+
+        Assert.Equal(expectedLevel, level);
+    }
+
+    [Theory]
+    [InlineData(120, 100, 300)]
+    [InlineData(350, 300, null)]
+    public async Task GetLevelProgressAsync_ReturnsCurrentAndNextThresholds(int xp, int currentLevelXp, int? nextLevelXp)
+    {
+        await using var db = CreateDbContext();
+        SeedLevelThresholds(db);
+        var service = CreateService(db);
+
+        var progress = await service.GetLevelProgressAsync(xp);
+
+        Assert.Equal(currentLevelXp, progress.CurrentLevelXp);
+        Assert.Equal(nextLevelXp, progress.NextLevelXp);
+    }
+
+    private static AppDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseInMemoryDatabase($"GamificationTests_{Guid.NewGuid()}")
+            .Options;
+        return new AppDbContext(options);
+    }
+
+    private static GamificationService CreateService(AppDbContext db)
+    {
+        var notifications = Substitute.For<INotificationService>();
+        notifications.CreateUserNotificationAsync(
+                Arg.Any<int>(),
+                Arg.Any<string>(),
+                Arg.Any<string>(),
+                Arg.Any<string>(),
+                Arg.Any<CancellationToken>())
+            .Returns(callInfo => new UserNotificationDto(1, callInfo.ArgAt<string>(1), callInfo.ArgAt<string>(2), callInfo.ArgAt<string>(3), false, DateTime.UtcNow));
+        notifications.SendAsync(Arg.Any<NotificationMessage>(), Arg.Any<CancellationToken>())
+            .Returns(Task.CompletedTask);
+
+        return new GamificationService(db, notifications, NullLogger<GamificationService>.Instance);
+    }
+
+    private static void SeedLevelThresholds(AppDbContext db)
+    {
+        db.LevelThresholds.AddRange(
+            new LevelThreshold { Level = 1, RequiredXp = 0 },
+            new LevelThreshold { Level = 2, RequiredXp = 100 },
+            new LevelThreshold { Level = 3, RequiredXp = 300 });
+        db.SaveChanges();
+    }
+
+    private static Achievement Achievement(int id, string name, string condition, int coinReward) => new()
+    {
+        Id = id,
+        Name = name,
+        Condition = condition,
+        CoinReward = coinReward
+    };
+
+    private static Lecture Lecture(int id, DateTime startsAt) => new()
+    {
+        Id = id,
+        CourseId = 1,
+        Title = $"Lecture {id}",
+        StartsAt = startsAt,
+        EndsAt = startsAt.AddHours(2)
+    };
+}

backend/UniVerse.Api.Tests/Helpers/ApiWebApplicationFactory.cs

@@ -0,0 +1,327 @@
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Hosting;
+using NSubstitute;
+using UniVerse.Application.DTOs.Achievements;
+using UniVerse.Application.DTOs.Auth;
+using UniVerse.Application.DTOs.Common;
+using UniVerse.Application.DTOs.Courses;
+using UniVerse.Application.DTOs.Gamification;
+using UniVerse.Application.DTOs.Lectures;
+using UniVerse.Application.DTOs.Locations;
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.DTOs.Reviews;
+using UniVerse.Application.DTOs.Sync;
+using UniVerse.Application.DTOs.Tags;
+using UniVerse.Application.DTOs.Users;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Enums;
+using UniVerse.Infrastructure.Data;
+
+namespace UniVerse.Api.Tests.Helpers;
+
+/// <summary>
+/// WebApplicationFactory для интеграционных тестов.
+/// Заменяет Npgsql DbContext на InMemory, создает заглушки для всех интерфейсов внешних сервисов
+/// и отключает фоновую службу LLM, чтобы тестам не требовалась реальная инфраструктура.
+/// </summary>
+public class ApiWebApplicationFactory : WebApplicationFactory<Program>
+{
+    protected override void ConfigureWebHost(IWebHostBuilder builder)
+    {
+        // Используем Development, чтобы были включены Swagger и конечная точка DevLogin
+        builder.UseEnvironment("Development");
+
+        builder.ConfigureAppConfiguration((_, config) =>
+        {
+            // Внедряем настройки тестового JWT — должны совпадать с константами TestJwtFactory
+            var testSettings = new Dictionary<string, string?>
+            {
+                ["Jwt:Secret"]   = TestJwtFactory.Secret,
+                ["Jwt:Issuer"]   = TestJwtFactory.Issuer,
+                ["Jwt:Audience"] = TestJwtFactory.Audience,
+                // Отключаем оркестрацию Aspire
+                ["Aspire:Enabled"] = "false",
+                // Фиктивные значения Azure AD (маршруты имеют атрибут [AllowAnonymous] или тестируются отдельно)
+                ["AzureAd:TenantId"] = "test-tenant",
+                ["AzureAd:ClientId"] = "test-client",
+                // Фиктивные значения LLM / Modeus (клиенты заменяются ниже)
+                ["Llm:BaseUrl"]      = "http://localhost:9999/",
+                ["ModeusApi:BaseUrl"] = "http://localhost:9998/",
+            };
+            config.AddInMemoryCollection(testSettings);
+        });
+
+        builder.ConfigureServices(services =>
+        {
+            // ── 1. Заменяем Npgsql DbContext на InMemory ──────────────────────────
+            services.RemoveAll<DbContextOptions<AppDbContext>>();
+            services.RemoveAll<AppDbContext>();
+
+            // Удаляем все регистрации, связанные с DbContext, которые добавил хост
+            var descriptor = services.SingleOrDefault(
+                d => d.ServiceType == typeof(DbContextOptions<AppDbContext>));
+            if (descriptor != null) services.Remove(descriptor);
+
+            // Находим и удаляем все дескрипторы настроек DbContext
+            var dbContextDescriptors = services
+                .Where(d => d.ServiceType == typeof(DbContextOptions<AppDbContext>)
+                         || d.ImplementationType == typeof(AppDbContext))
+                .ToList();
+            foreach (var d in dbContextDescriptors) services.Remove(d);
+
+            services.AddDbContext<AppDbContext>(options =>
+                options.UseInMemoryDatabase($"TestDb_{Guid.NewGuid()}"));
+
+            // ── 2. Отключаем фоновые службы ────────────────────────────────────
+            // Удаляем все регистрации IHostedService, чтобы предотвратить запуск фоновой задачи LLM
+            var hostedServices = services
+                .Where(d => d.ServiceType == typeof(IHostedService))
+                .ToList();
+            foreach (var d in hostedServices) services.Remove(d);
+
+            // ── 3. Создаем заглушки для всех интерфейсов Application сервисов ─────────
+            ReplaceWithSubstitute<IAuthService>(services, CreateAuthServiceStub());
+            ReplaceWithSubstitute<IUserService>(services, CreateUserServiceStub());
+            ReplaceWithSubstitute<ILectureService>(services, CreateLectureServiceStub());
+            ReplaceWithSubstitute<IReviewService>(services, CreateReviewServiceStub());
+            ReplaceWithSubstitute<IReviewPromptService>(services, CreateReviewPromptServiceStub());
+            ReplaceWithSubstitute<ICourseService>(services, CreateCourseServiceStub());
+            ReplaceWithSubstitute<ITagService>(services, CreateTagServiceStub());
+            ReplaceWithSubstitute<ILocationService>(services, CreateLocationServiceStub());
+            ReplaceWithSubstitute<IAchievementService>(services, CreateAchievementServiceStub());
+            ReplaceWithSubstitute<IGamificationService>(services, CreateGamificationServiceStub());
+            ReplaceWithSubstitute<IScheduleSyncService>(services, CreateSyncServiceStub());
+            ReplaceWithSubstitute<ILlmAnalysisService>(services, Substitute.For<ILlmAnalysisService>());
+            ReplaceWithSubstitute<ILlmClient>(services, Substitute.For<ILlmClient>());
+            ReplaceWithSubstitute<IMicrosoftAuthClient>(services, Substitute.For<IMicrosoftAuthClient>());
+            ReplaceWithSubstitute<INotificationService>(services, CreateNotificationServiceStub());
+        });
+    }
+
+    private static void ReplaceWithSubstitute<TService>(IServiceCollection services, TService instance)
+        where TService : class
+    {
+        services.RemoveAll<TService>();
+        services.AddScoped<TService>(_ => instance);
+    }
+
+    // ── Фабрики заглушек ────────────────────────────────────────────────────────────
+
+    private static IAuthService CreateAuthServiceStub()
+    {
+        var stub = Substitute.For<IAuthService>();
+        var authResult = new AuthResult(
+            new AuthResponse("access_token", DateTime.UtcNow.AddHours(1),
+                new UserAuthDto(1, "test@test.com", "Test User", [UserRole.Student])),
+            "refresh_token");
+        stub.LoginWithMicrosoftAsync(Arg.Any<string>(), Arg.Any<string?>(), Arg.Any<string?>())
+            .Returns(authResult);
+        stub.DevLoginAsync(Arg.Any<string>(), Arg.Any<string?>(), Arg.Any<IReadOnlyCollection<UserRole>>(), Arg.Any<string?>())
+            .Returns(authResult);
+        stub.RefreshTokenAsync(Arg.Any<string>()).Returns(authResult);
+        stub.GetCurrentUserAsync(Arg.Any<int>())
+            .Returns(new CurrentUserDto(1, "test@test.com", "Test", null, [UserRole.Student], 0, 0, 1, DateTime.UtcNow));
+        return stub;
+    }
+
+    private static INotificationService CreateNotificationServiceStub()
+    {
+        var stub = Substitute.For<INotificationService>();
+        stub.SendAsync(Arg.Any<NotificationMessage>(), Arg.Any<CancellationToken>())
+            .Returns(Task.CompletedTask);
+        stub.ScheduleAsync(Arg.Any<ScheduleNotificationRequest>(), Arg.Any<CancellationToken>())
+            .Returns(new ScheduledNotificationResponse("test-job", DateTimeOffset.UtcNow.AddMinutes(5)));
+        stub.GetUserNotificationsAsync(Arg.Any<int>(), Arg.Any<PaginationRequest>(), Arg.Any<CancellationToken>())
+            .Returns(PagedResult<UserNotificationDto>.Create([], 0, 1, 20));
+        stub.MarkAllReadAsync(Arg.Any<int>(), Arg.Any<CancellationToken>())
+            .Returns(Task.CompletedTask);
+        stub.CreateUserNotificationAsync(
+                Arg.Any<int>(),
+                Arg.Any<string>(),
+                Arg.Any<string>(),
+                Arg.Any<string>(),
+                Arg.Any<CancellationToken>())
+            .Returns(new UserNotificationDto(1, "achievement", "Title", "Body", false, DateTime.UtcNow));
+        return stub;
+    }
+
+    private static IUserService CreateUserServiceStub()
+    {
+        var stub = Substitute.For<IUserService>();
+        var userDto = new UserDto(1, "test@test.com", "Test", null, [UserRole.Student], true, 0, 0, 1, DateTime.UtcNow);
+        var pagedUsers = PagedResult<UserDto>.Create([userDto], 1, 1, 20);
+        var lectureDto = new LectureDto(1, 1, "Course", null, null, null, null,
+            "Title", null, LectureFormat.Offline,
+            DateTime.UtcNow, DateTime.UtcNow.AddHours(2),
+            true, 30, 0, null, DateTime.UtcNow, true);
+        var pagedLectures = PagedResult<LectureDto>.Create([lectureDto], 1, 1, 20);
+
+        stub.GetByIdAsync(Arg.Any<int>()).Returns(userDto);
+        stub.UpdateProfileAsync(Arg.Any<int>(), Arg.Any<UpdateUserRequest>()).Returns(userDto);
+        stub.GetStatsAsync(Arg.Any<int>()).Returns(new UserStatsDto(
+            0,
+            0,
+            0,
+            0,
+            0,
+            1,
+            0,
+            0,
+            100,
+            0,
+            3,
+            [new EnrollmentSlotRuleDto(1, 3), new EnrollmentSlotRuleDto(3, 5), new EnrollmentSlotRuleDto(4, 7)]));
+        stub.GetEnrollmentsAsync(Arg.Any<int>(), Arg.Any<PaginationRequest>()).Returns(pagedLectures);
+        stub.GetAllAsync(Arg.Any<UserFilterRequest>()).Returns(pagedUsers);
+        stub.SetRolesAsync(Arg.Any<int>(), Arg.Any<IReadOnlyCollection<UserRole>>()).Returns(Task.CompletedTask);
+        stub.SetActiveAsync(Arg.Any<int>(), Arg.Any<bool>()).Returns(Task.CompletedTask);
+        return stub;
+    }
+
+    private static ILectureService CreateLectureServiceStub()
+    {
+        var stub = Substitute.For<ILectureService>();
+        var lectureDto = new LectureDto(1, 1, "Course", null, null, null, null,
+            "Title", null, LectureFormat.Offline,
+            DateTime.UtcNow, DateTime.UtcNow.AddHours(2),
+            true, 30, 0, null, DateTime.UtcNow);
+        var detailDto = new LectureDetailDto(1, 1, "Course", null, null, null, null,
+            "Title", null, LectureFormat.Offline,
+            DateTime.UtcNow, DateTime.UtcNow.AddHours(2),
+            true, 30, 0, null, DateTime.UtcNow, false);
+        var pagedLectures = PagedResult<LectureDto>.Create([lectureDto], 1, 1, 20);
+        var pagedEnrollments = PagedResult<EnrollmentDto>.Create([], 0, 1, 20);
+
+        stub.GetAllAsync(Arg.Any<LectureFilterRequest>(), Arg.Any<int?>()).Returns(pagedLectures);
+        stub.GetByIdAsync(Arg.Any<int>(), Arg.Any<int?>()).Returns(detailDto);
+        stub.CreateAsync(Arg.Any<CreateLectureRequest>()).Returns(lectureDto);
+        stub.UpdateAsync(Arg.Any<int>(), Arg.Any<UpdateLectureRequest>(), Arg.Any<int>(), Arg.Any<bool>()).Returns(lectureDto);
+        stub.DeleteAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        stub.EnrollAsync(Arg.Any<int>(), Arg.Any<int>()).Returns(Task.CompletedTask);
+        stub.UnenrollAsync(Arg.Any<int>(), Arg.Any<int>()).Returns(Task.CompletedTask);
+        stub.MarkAttendanceAsync(Arg.Any<int>(), Arg.Any<int>(), Arg.Any<bool>(), Arg.Any<int>(), Arg.Any<bool>()).Returns(Task.CompletedTask);
+        stub.GetEnrollmentsAsync(Arg.Any<int>(), Arg.Any<PaginationRequest>(), Arg.Any<int>(), Arg.Any<bool>()).Returns(pagedEnrollments);
+        return stub;
+    }
+
+    private static IReviewService CreateReviewServiceStub()
+    {
+        var stub = Substitute.For<IReviewService>();
+        var reviewDto = new ReviewDto(1, 1, "Lecture", 1, "User",
+            ReviewRating.Like, "Great!", ReviewLlmStatus.Pending,
+            null, null, null, null, null, DateTime.UtcNow);
+        var pagedReviews = PagedResult<ReviewDto>.Create([reviewDto], 1, 1, 20);
+
+        stub.CreateAsync(Arg.Any<int>(), Arg.Any<CreateReviewRequest>()).Returns(reviewDto);
+        stub.GetByIdAsync(Arg.Any<int>()).Returns(reviewDto);
+        stub.UpdateAsync(Arg.Any<int>(), Arg.Any<int>(), Arg.Any<UpdateReviewRequest>()).Returns(reviewDto);
+        stub.DeleteAsync(Arg.Any<int>(), Arg.Any<int>(), Arg.Any<bool>()).Returns(Task.CompletedTask);
+        stub.GetByLectureAsync(Arg.Any<int>(), Arg.Any<PaginationRequest>(), Arg.Any<int?>(), Arg.Any<bool>()).Returns(pagedReviews);
+        stub.GetByUserAsync(Arg.Any<int>(), Arg.Any<PaginationRequest>()).Returns(pagedReviews);
+        stub.GetAllAsync(Arg.Any<ReviewFilterRequest>()).Returns(pagedReviews);
+        stub.ReanalyzeAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        return stub;
+    }
+
+    private static IReviewPromptService CreateReviewPromptServiceStub()
+    {
+        var stub = Substitute.For<IReviewPromptService>();
+        var promptDto = new ReviewPromptDto(
+            "Analyze {lectureContext}. Review: {reviewText}",
+            DateTime.UtcNow);
+
+        stub.GetAsync().Returns(promptDto);
+        stub.UpdateAsync(Arg.Any<UpdateReviewPromptRequest>()).Returns(callInfo =>
+            new ReviewPromptDto(callInfo.Arg<UpdateReviewPromptRequest>().Prompt, DateTime.UtcNow));
+        return stub;
+    }
+
+    private static ICourseService CreateCourseServiceStub()
+    {
+        var stub = Substitute.For<ICourseService>();
+        var courseDto = new CourseDto(1, "Course", null, false, [], DateTime.UtcNow);
+        var paged = PagedResult<CourseDto>.Create([courseDto], 1, 1, 20);
+
+        stub.GetAllAsync(Arg.Any<CourseFilterRequest>()).Returns(paged);
+        stub.GetByIdAsync(Arg.Any<int>()).Returns(courseDto);
+        stub.CreateAsync(Arg.Any<CreateCourseRequest>()).Returns(courseDto);
+        stub.UpdateAsync(Arg.Any<int>(), Arg.Any<UpdateCourseRequest>()).Returns(courseDto);
+        stub.DeleteAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        stub.AddTagAsync(Arg.Any<int>(), Arg.Any<int>()).Returns(Task.CompletedTask);
+        stub.RemoveTagAsync(Arg.Any<int>(), Arg.Any<int>()).Returns(Task.CompletedTask);
+        return stub;
+    }
+
+    private static ITagService CreateTagServiceStub()
+    {
+        var stub = Substitute.For<ITagService>();
+        var tagDto = new TagDto(1, "Tag", TagType.Topic, null, DateTime.UtcNow);
+
+        stub.GetAllAsync(Arg.Any<TagType?>(), Arg.Any<int?>()).Returns([tagDto]);
+        stub.GetByIdAsync(Arg.Any<int>()).Returns(tagDto);
+        stub.CreateAsync(Arg.Any<CreateTagRequest>()).Returns(tagDto);
+        stub.UpdateAsync(Arg.Any<int>(), Arg.Any<UpdateTagRequest>()).Returns(tagDto);
+        stub.DeleteAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        stub.GetTreeAsync().Returns(new List<TagTreeDto>());
+        return stub;
+    }
+
+    private static ILocationService CreateLocationServiceStub()
+    {
+        var stub = Substitute.For<ILocationService>();
+        var locationDto = new LocationDto(1, "Room 101", null, null, null, DateTime.UtcNow);
+
+        stub.GetAllAsync().Returns([locationDto]);
+        stub.GetByIdAsync(Arg.Any<int>()).Returns(locationDto);
+        stub.CreateAsync(Arg.Any<CreateLocationRequest>()).Returns(locationDto);
+        stub.UpdateAsync(Arg.Any<int>(), Arg.Any<UpdateLocationRequest>()).Returns(locationDto);
+        stub.DeleteAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        return stub;
+    }
+
+    private static IAchievementService CreateAchievementServiceStub()
+    {
+        var stub = Substitute.For<IAchievementService>();
+        var achievementDto = new AchievementDto(1, "First Review", null, null, 10, 5, null, DateTime.UtcNow);
+
+        stub.GetAllAsync().Returns([achievementDto]);
+        stub.GetByIdAsync(Arg.Any<int>()).Returns(achievementDto);
+        stub.CreateAsync(Arg.Any<CreateAchievementRequest>()).Returns(achievementDto);
+        stub.UpdateAsync(Arg.Any<int>(), Arg.Any<UpdateAchievementRequest>()).Returns(achievementDto);
+        stub.DeleteAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        return stub;
+    }
+
+    private static IGamificationService CreateGamificationServiceStub()
+    {
+        var stub = Substitute.For<IGamificationService>();
+        var paged = PagedResult<CoinTransactionDto>.Create([], 0, 1, 20);
+
+        stub.GetUserAchievementsAsync(Arg.Any<int>()).Returns(new List<UserAchievementDto>());
+        stub.GetTransactionsAsync(Arg.Any<int>(), Arg.Any<PaginationRequest>()).Returns(paged);
+        stub.AwardCoinsAsync(Arg.Any<int>(), Arg.Any<int>(), Arg.Any<CoinTransactionType>(),
+            Arg.Any<int?>(), Arg.Any<int?>(), Arg.Any<string?>()).Returns(Task.CompletedTask);
+        stub.CheckAndAwardAchievementsAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        stub.CalculateLevelAsync(Arg.Any<int>()).Returns(Task.FromResult(1));
+        stub.GetLevelProgressAsync(Arg.Any<int>()).Returns(Task.FromResult(new LevelProgressDto(0, 100)));
+        return stub;
+    }
+
+    private static IScheduleSyncService CreateSyncServiceStub()
+    {
+        var stub = Substitute.For<IScheduleSyncService>();
+        var syncResult = new SyncResultDto(0, 0, 0, null);
+        var syncStatus = new SyncStatusDto(null, "idle", null);
+
+        stub.SyncScheduleAsync(Arg.Any<SyncScheduleRequest>()).Returns(syncResult);
+        stub.SyncRoomsAsync().Returns(syncResult);
+        stub.SearchEmployeesAsync(Arg.Any<string>()).Returns(new List<EmployeeDto>());
+        stub.GetLastSyncStatusAsync().Returns(syncStatus);
+        return stub;
+    }
+}

backend/UniVerse.Api.Tests/Helpers/TestJwtFactory.cs

@@ -0,0 +1,44 @@
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+using Microsoft.IdentityModel.Tokens;
+
+namespace UniVerse.Api.Tests.Helpers;
+
+/// <summary>
+/// Генерирует подписанные JWT токены для использования в интеграционных тестах.
+/// Использует те же секрет/издателя/аудиторию (secret/issuer/audience), которые внедряет ApiWebApplicationFactory.
+/// </summary>
+public static class TestJwtFactory
+{
+    public const string Secret   = "test-super-secret-key-32-chars!!";
+    public const string Issuer   = "UniVerse-Test";
+    public const string Audience = "UniVerse-Test";
+
+    /// <summary>Создает валидную строку токена JWT (bearer) для заданной роли и идентификатора пользователя.</summary>
+    public static string Generate(string role, int userId = 1)
+    {
+        var key     = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Secret));
+        var creds   = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
+
+        var claims = new[]
+        {
+            new Claim(ClaimTypes.NameIdentifier, userId.ToString()),
+            new Claim(ClaimTypes.Role, role),
+            new Claim("sub", userId.ToString()),
+        };
+
+        var token = new JwtSecurityToken(
+            issuer:             Issuer,
+            audience:           Audience,
+            claims:             claims,
+            expires:            DateTime.UtcNow.AddHours(1),
+            signingCredentials: creds);
+
+        return new JwtSecurityTokenHandler().WriteToken(token);
+    }
+
+    /// <summary>Создает значение заголовка Authorization: "Bearer &lt;token&gt;".</summary>
+    public static string BearerHeader(string role, int userId = 1)
+        => $"Bearer {Generate(role, userId)}";
+}

backend/UniVerse.Api.Tests/Lectures/LectureServiceTests.cs

@@ -0,0 +1,241 @@
+using Microsoft.EntityFrameworkCore;
+using NSubstitute;
+using UniVerse.Application.DTOs.Lectures;
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Entities;
+using UniVerse.Domain.Exceptions;
+using UniVerse.Infrastructure.Data;
+using UniVerse.Infrastructure.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Lectures;
+
+public class LectureServiceTests
+{
+    [Fact]
+    public async Task GetAllAsync_MarksLecturesEnrolledByCurrentUser()
+    {
+        await using var db = CreateDbContext();
+        var service = new LectureService(db, Substitute.For<IGamificationService>(), Substitute.For<INotificationScheduler>());
+        var startsAt = DateTime.UtcNow.AddDays(1);
+
+        db.Users.Add(new User { Id = 1, Email = "student@test.local" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.AddRange(
+            Lecture(1, startsAt),
+            Lecture(2, startsAt.AddDays(1)));
+        db.LectureEnrollments.Add(new LectureEnrollment { LectureId = 1, UserId = 1 });
+        await db.SaveChangesAsync();
+
+        var result = await service.GetAllAsync(new LectureFilterRequest(null, null, null, null, null, null, null, null), 1);
+
+        Assert.True(result.Items.Single(item => item.Id == 1).IsEnrolled);
+        Assert.False(result.Items.Single(item => item.Id == 2).IsEnrolled);
+    }
+
+    [Fact]
+    public async Task EnrollAsync_SchedulesLectureReminders()
+    {
+        await using var db = CreateDbContext();
+        var scheduler = Substitute.For<INotificationScheduler>();
+        var service = new LectureService(db, Substitute.For<IGamificationService>(), scheduler);
+        var startsAt = DateTime.UtcNow.AddHours(4);
+
+        db.Users.Add(new User { Id = 1, Email = "student@test.local", DisplayName = "Student" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(Lecture(1, startsAt));
+        await db.SaveChangesAsync();
+
+        await service.EnrollAsync(1, 1);
+
+        await scheduler.Received(1).ScheduleAsync(
+            Arg.Is<NotificationMessage>(m => m.Recipient == "student@test.local" && m.Subject.Contains("через 3 часа")),
+            Arg.Is<DateTimeOffset>(d => d == new DateTimeOffset(startsAt.AddHours(-3))),
+            "lecture-1-user-1-starts-in-3-hours",
+            Arg.Any<CancellationToken>());
+        await scheduler.Received(1).ScheduleAsync(
+            Arg.Is<NotificationMessage>(m => m.Recipient == "student@test.local" && m.Subject.Contains("через 1 час")),
+            Arg.Is<DateTimeOffset>(d => d == new DateTimeOffset(startsAt.AddHours(-1))),
+            "lecture-1-user-1-starts-in-1-hour",
+            Arg.Any<CancellationToken>());
+        await scheduler.Received(1).ScheduleAsync(
+            Arg.Is<NotificationMessage>(m => m.Recipient == "student@test.local" && m.Subject.Contains("Оцените")),
+            Arg.Is<DateTimeOffset>(d => d == new DateTimeOffset(startsAt.AddHours(2))),
+            "lecture-1-user-1-ended",
+            Arg.Any<CancellationToken>());
+    }
+
+    [Fact]
+    public async Task EnrollAsync_SkipsPastLectureReminders()
+    {
+        await using var db = CreateDbContext();
+        var scheduler = Substitute.For<INotificationScheduler>();
+        var service = new LectureService(db, Substitute.For<IGamificationService>(), scheduler);
+        var startsAt = DateTime.UtcNow.AddMinutes(90);
+
+        db.Users.Add(new User { Id = 1, Email = "student@test.local" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(Lecture(1, startsAt));
+        await db.SaveChangesAsync();
+
+        await service.EnrollAsync(1, 1);
+
+        await scheduler.DidNotReceive().ScheduleAsync(
+            Arg.Any<NotificationMessage>(),
+            Arg.Any<DateTimeOffset>(),
+            "lecture-1-user-1-starts-in-3-hours",
+            Arg.Any<CancellationToken>());
+        await scheduler.Received(2).ScheduleAsync(
+            Arg.Any<NotificationMessage>(),
+            Arg.Any<DateTimeOffset>(),
+            Arg.Any<string>(),
+            Arg.Any<CancellationToken>());
+    }
+
+    [Theory]
+    [InlineData(1, 3)]
+    [InlineData(2, 3)]
+    [InlineData(3, 5)]
+    [InlineData(4, 7)]
+    [InlineData(5, 7)]
+    public async Task EnrollAsync_ThrowsWhenActiveEnrollmentLimitReached(int level, int activeEnrollments)
+    {
+        await using var db = CreateDbContext();
+        var gamification = Substitute.For<IGamificationService>();
+        gamification.CalculateLevelAsync(Arg.Any<int>()).Returns(level);
+        var service = new LectureService(db, gamification, Substitute.For<INotificationScheduler>());
+        var startsAt = DateTime.UtcNow.AddDays(1);
+
+        db.Users.Add(new User { Id = 1, Email = "student@test.local" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(Lecture(100, startsAt.AddDays(100)));
+        for (var i = 1; i <= activeEnrollments; i++)
+        {
+            db.Lectures.Add(Lecture(i, startsAt.AddDays(i)));
+            db.LectureEnrollments.Add(new LectureEnrollment { LectureId = i, UserId = 1 });
+        }
+        await db.SaveChangesAsync();
+
+        await Assert.ThrowsAsync<ConflictException>(() => service.EnrollAsync(100, 1));
+    }
+
+    [Fact]
+    public async Task EnrollAsync_ThrowsWhenPastUnattendedEnrollmentsReachLimit()
+    {
+        await using var db = CreateDbContext();
+        var gamification = Substitute.For<IGamificationService>();
+        gamification.CalculateLevelAsync(Arg.Any<int>()).Returns(1);
+        var service = new LectureService(db, gamification, Substitute.For<INotificationScheduler>());
+        var now = DateTime.UtcNow;
+
+        db.Users.Add(new User { Id = 1, Email = "student@test.local" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(Lecture(100, now.AddDays(1)));
+        for (var i = 1; i <= 3; i++)
+        {
+            db.Lectures.Add(Lecture(i, now.AddDays(-i)));
+            db.LectureEnrollments.Add(new LectureEnrollment { LectureId = i, UserId = 1 });
+        }
+        await db.SaveChangesAsync();
+
+        await Assert.ThrowsAsync<ConflictException>(() => service.EnrollAsync(100, 1));
+    }
+
+    [Fact]
+    public async Task EnrollAsync_DoesNotCountAttendedEnrollmentsTowardLimit()
+    {
+        await using var db = CreateDbContext();
+        var gamification = Substitute.For<IGamificationService>();
+        gamification.CalculateLevelAsync(Arg.Any<int>()).Returns(1);
+        var service = new LectureService(db, gamification, Substitute.For<INotificationScheduler>());
+        var now = DateTime.UtcNow;
+
+        db.Users.Add(new User { Id = 1, Email = "student@test.local" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(Lecture(100, now.AddDays(1)));
+        for (var i = 1; i <= 3; i++)
+        {
+            db.Lectures.Add(Lecture(i, now.AddDays(-i)));
+            db.LectureEnrollments.Add(new LectureEnrollment { LectureId = i, UserId = 1, Attended = true });
+        }
+        await db.SaveChangesAsync();
+
+        await service.EnrollAsync(100, 1);
+
+        Assert.True(await db.LectureEnrollments.AnyAsync(e => e.LectureId == 100 && e.UserId == 1));
+    }
+
+    [Fact]
+    public async Task UnenrollAsync_CancelsLectureReminders()
+    {
+        await using var db = CreateDbContext();
+        var scheduler = Substitute.For<INotificationScheduler>();
+        var service = new LectureService(db, Substitute.For<IGamificationService>(), scheduler);
+        var startsAt = DateTime.UtcNow.AddHours(4);
+
+        db.Users.Add(new User { Id = 1, Email = "student@test.local" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(Lecture(1, startsAt));
+        db.LectureEnrollments.Add(new LectureEnrollment { LectureId = 1, UserId = 1 });
+        await db.SaveChangesAsync();
+
+        await service.UnenrollAsync(1, 1);
+
+        await scheduler.Received(1).CancelAsync("lecture-1-user-1-starts-in-3-hours", Arg.Any<CancellationToken>());
+        await scheduler.Received(1).CancelAsync("lecture-1-user-1-starts-in-1-hour", Arg.Any<CancellationToken>());
+        await scheduler.Received(1).CancelAsync("lecture-1-user-1-ended", Arg.Any<CancellationToken>());
+    }
+
+    [Fact]
+    public async Task UpdateAsync_TeacherCannotUpdateAnotherTeachersLecture()
+    {
+        await using var db = CreateDbContext();
+        var service = new LectureService(db, Substitute.For<IGamificationService>(), Substitute.For<INotificationScheduler>());
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        var lecture = Lecture(1, DateTime.UtcNow.AddDays(1));
+        lecture.TeacherId = 2;
+        db.Lectures.Add(lecture);
+        await db.SaveChangesAsync();
+
+        var request = new UpdateLectureRequest(null, null, "Updated", null, Domain.Enums.LectureFormat.Offline,
+            DateTime.UtcNow.AddDays(1), DateTime.UtcNow.AddDays(1).AddHours(2), true, 30, null);
+
+        await Assert.ThrowsAsync<ForbiddenException>(() => service.UpdateAsync(1, request, currentUserId: 1));
+    }
+
+    [Fact]
+    public async Task GetEnrollmentsAsync_AdminCanReadAnyLecture()
+    {
+        await using var db = CreateDbContext();
+        var service = new LectureService(db, Substitute.For<IGamificationService>(), Substitute.For<INotificationScheduler>());
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        var lecture = Lecture(1, DateTime.UtcNow.AddDays(1));
+        lecture.TeacherId = 2;
+        db.Lectures.Add(lecture);
+        await db.SaveChangesAsync();
+
+        var result = await service.GetEnrollmentsAsync(1, new UniVerse.Application.DTOs.Common.PaginationRequest(), currentUserId: 1, isAdmin: true);
+
+        Assert.Empty(result.Items);
+    }
+
+    private static AppDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseInMemoryDatabase($"LectureServiceTests_{Guid.NewGuid()}")
+            .Options;
+        return new AppDbContext(options);
+    }
+
+    private static Lecture Lecture(int id, DateTime startsAt) => new()
+    {
+        Id = id,
+        CourseId = 1,
+        Title = $"Lecture {id}",
+        StartsAt = startsAt,
+        EndsAt = startsAt.AddHours(2),
+        IsOpen = true,
+        MaxEnrollments = 30
+    };
+}

backend/UniVerse.Api.Tests/Reviews/LlmAnalysisServiceTests.cs

@@ -0,0 +1,91 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging.Abstractions;
+using NSubstitute;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Entities;
+using UniVerse.Domain.Enums;
+using UniVerse.Infrastructure.Data;
+using UniVerse.Infrastructure.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Reviews;
+
+public class LlmAnalysisServiceTests
+{
+    [Fact]
+    public async Task AnalyzeReviewAsync_SavesParsedAnalysisResult()
+    {
+        await using var db = CreateDbContext();
+        await SeedPendingReviewAsync(db);
+        var llm = Substitute.For<ILlmClient>();
+        llm.AnalyzeReviewAsync(Arg.Any<string>(), Arg.Any<string>())
+            .Returns(new LlmReviewAnalysis(
+                0.76,
+                "Положительный",
+                ["lecture structure", "practical examples"],
+                true,
+                "{\"quality_score\":0.76,\"sentiment\":\"Положительный\"}"));
+        var gamification = Substitute.For<IGamificationService>();
+        gamification.AwardCoinsAsync(
+                Arg.Any<int>(),
+                Arg.Any<int>(),
+                Arg.Any<CoinTransactionType>(),
+                Arg.Any<int?>(),
+                Arg.Any<int?>(),
+                Arg.Any<string?>())
+            .Returns(Task.CompletedTask);
+        gamification.CheckAndAwardAchievementsAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        var service = new LlmAnalysisService(db, llm, gamification, NullLogger<LlmAnalysisService>.Instance);
+
+        await service.AnalyzeReviewAsync(1);
+
+        var review = await db.Reviews.SingleAsync(r => r.Id == 1);
+        Assert.Equal(ReviewLlmStatus.Analyzed, review.LlmStatus);
+        Assert.Equal(ReviewSentiment.Positive, review.Sentiment);
+        Assert.Equal(0.76, review.QualityScore);
+        Assert.True(review.IsInformative);
+        Assert.Equal(["lecture structure", "practical examples"], review.LlmTags!);
+        Assert.Equal("{\"quality_score\":0.76,\"sentiment\":\"Положительный\"}", review.LlmRawOutput);
+        await gamification.Received(1).AwardCoinsAsync(
+            1,
+            10,
+            CoinTransactionType.ReviewReward,
+            1,
+            null,
+            "Informative review reward");
+    }
+
+    private static async Task SeedPendingReviewAsync(AppDbContext db)
+    {
+        db.Users.Add(new User { Id = 1, Email = "student@test.local", DisplayName = "Student" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(new Lecture
+        {
+            Id = 1,
+            CourseId = 1,
+            Title = "Lecture",
+            StartsAt = DateTime.UtcNow.AddDays(-1),
+            EndsAt = DateTime.UtcNow.AddDays(-1).AddHours(2),
+            IsOpen = true,
+            MaxEnrollments = 30
+        });
+        db.Reviews.Add(new Review
+        {
+            Id = 1,
+            LectureId = 1,
+            UserId = 1,
+            Rating = ReviewRating.Like,
+            Text = "Useful review",
+            LlmStatus = ReviewLlmStatus.Pending
+        });
+        await db.SaveChangesAsync();
+    }
+
+    private static AppDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseInMemoryDatabase($"LlmAnalysisServiceTests_{Guid.NewGuid()}")
+            .Options;
+        return new AppDbContext(options);
+    }
+}

backend/UniVerse.Api.Tests/Reviews/ReviewAnalysisWorkerTests.cs

@@ -0,0 +1,96 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.Extensions.Options;
+using UniVerse.Api.BackgroundServices;
+using UniVerse.Api.Options;
+using UniVerse.Application.Interfaces;
+using UniVerse.Infrastructure.Data;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Reviews;
+
+public class ReviewAnalysisWorkerTests
+{
+    [Theory]
+    [InlineData(1)]
+    [InlineData(2)]
+    public async Task Worker_DoesNotExceedConfiguredConcurrency(int maxConcurrentProcessing)
+    {
+        var queue = new ReviewAnalysisQueue();
+        var analysisService = new RecordingLlmAnalysisService();
+        await using var provider = CreateServiceProvider(analysisService);
+        var worker = new ReviewAnalysisWorker(
+            provider,
+            queue,
+            Microsoft.Extensions.Options.Options.Create(
+                new ReviewAnalysisOptions { MaxConcurrentProcessing = maxConcurrentProcessing }),
+            NullLogger<ReviewAnalysisWorker>.Instance);
+
+        for (var reviewId = 1; reviewId <= 6; reviewId++)
+            await queue.EnqueueAsync(reviewId);
+
+        analysisService.ExpectProcessed(6);
+        await worker.StartAsync(CancellationToken.None);
+        await analysisService.WaitForProcessedAsync();
+        await worker.StopAsync(CancellationToken.None);
+
+        Assert.True(
+            analysisService.MaxRunning <= maxConcurrentProcessing,
+            $"Expected at most {maxConcurrentProcessing} concurrent analyses, got {analysisService.MaxRunning}.");
+    }
+
+    private static ServiceProvider CreateServiceProvider(ILlmAnalysisService analysisService)
+    {
+        var services = new ServiceCollection();
+        services.AddDbContext<AppDbContext>(options =>
+            options.UseInMemoryDatabase($"ReviewAnalysisWorkerTests_{Guid.NewGuid()}"));
+        services.AddScoped(_ => analysisService);
+        return services.BuildServiceProvider();
+    }
+
+    private sealed class RecordingLlmAnalysisService : ILlmAnalysisService
+    {
+        private readonly TaskCompletionSource _processedAll = new(TaskCreationOptions.RunContinuationsAsynchronously);
+        private int _expectedCount;
+        private int _processedCount;
+        private int _running;
+        private int _maxRunning;
+
+        public int MaxRunning => _maxRunning;
+
+        public void ExpectProcessed(int expectedCount)
+        {
+            Volatile.Write(ref _expectedCount, expectedCount);
+        }
+
+        public async Task AnalyzeReviewAsync(int reviewId)
+        {
+            var running = Interlocked.Increment(ref _running);
+            UpdateMaxRunning(running);
+
+            await Task.Delay(50);
+
+            Interlocked.Decrement(ref _running);
+            if (Interlocked.Increment(ref _processedCount) >= Volatile.Read(ref _expectedCount))
+                _processedAll.TrySetResult();
+        }
+
+        public async Task WaitForProcessedAsync()
+        {
+            using var timeout = new CancellationTokenSource(TimeSpan.FromSeconds(5));
+            using var registration = timeout.Token.Register(() => _processedAll.TrySetCanceled(timeout.Token));
+            await _processedAll.Task;
+        }
+
+        private void UpdateMaxRunning(int running)
+        {
+            while (true)
+            {
+                var current = Volatile.Read(ref _maxRunning);
+                if (running <= current) return;
+                if (Interlocked.CompareExchange(ref _maxRunning, running, current) == current) return;
+            }
+        }
+    }
+}

backend/UniVerse.Api.Tests/Reviews/ReviewPromptServiceTests.cs

@@ -0,0 +1,184 @@
+using System.Net;
+using System.Text;
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging.Abstractions;
+using NSubstitute;
+using UniVerse.Application.DTOs.Reviews;
+using UniVerse.Application.Interfaces;
+using UniVerse.Application.Prompts;
+using UniVerse.Domain.Exceptions;
+using UniVerse.Infrastructure.Data;
+using UniVerse.Infrastructure.ExternalServices;
+using UniVerse.Infrastructure.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Reviews;
+
+public class ReviewPromptServiceTests
+{
+    [Fact]
+    public async Task GetAsync_ReturnsDefaultPrompt_WhenSettingDoesNotExist()
+    {
+        await using var db = CreateDbContext();
+        var service = new ReviewPromptService(db);
+
+        var result = await service.GetAsync();
+
+        Assert.Equal(ReviewPromptTemplate.Default, result.Prompt);
+        Assert.Null(result.UpdatedAt);
+    }
+
+    [Fact]
+    public async Task UpdateAsync_UpsertsSingletonPrompt()
+    {
+        await using var db = CreateDbContext();
+        var service = new ReviewPromptService(db);
+
+        await service.UpdateAsync(new UpdateReviewPromptRequest("First {lectureContext} {reviewText}"));
+        var result = await service.UpdateAsync(new UpdateReviewPromptRequest("Second {lectureContext} {reviewText}"));
+
+        Assert.Equal("Second {lectureContext} {reviewText}", result.Prompt);
+        Assert.NotNull(result.UpdatedAt);
+        Assert.Equal(1, await db.ReviewPromptSettings.CountAsync());
+        Assert.Equal("Second {lectureContext} {reviewText}", (await service.GetAsync()).Prompt);
+    }
+
+    [Theory]
+    [InlineData("")]
+    [InlineData("   ")]
+    [InlineData("Prompt without placeholders")]
+    [InlineData("Only lecture {lectureContext}")]
+    [InlineData("Only review {reviewText}")]
+    public async Task UpdateAsync_RejectsInvalidPrompt(string prompt)
+    {
+        await using var db = CreateDbContext();
+        var service = new ReviewPromptService(db);
+
+        await Assert.ThrowsAsync<BadRequestException>(() =>
+            service.UpdateAsync(new UpdateReviewPromptRequest(prompt)));
+    }
+
+    [Fact]
+    public async Task AnalyzeReviewAsync_RendersCustomPrompt()
+    {
+        var handler = new CapturingHandler();
+        var http = new HttpClient(handler)
+        {
+            BaseAddress = new Uri("https://llm.test/")
+        };
+        var config = new ConfigurationBuilder()
+            .AddInMemoryCollection(new Dictionary<string, string?>
+            {
+                ["Llm:Model"] = "test-model",
+                ["Llm:ApiKey"] = "test-key"
+            })
+            .Build();
+        var promptService = Substitute.For<IReviewPromptService>();
+        promptService.GetAsync().Returns(new ReviewPromptDto(
+            "Custom prompt. Context: {lectureContext}. Text: {reviewText}",
+            DateTime.UtcNow));
+        var client = new LlmClient(http, config, promptService, NullLogger<LlmClient>.Instance);
+
+        await client.AnalyzeReviewAsync("Very useful review", "Lecture: Algebra");
+
+        Assert.NotNull(handler.RequestBody);
+        using var requestJson = JsonDocument.Parse(handler.RequestBody!);
+        var content = requestJson.RootElement
+            .GetProperty("messages")[0]
+            .GetProperty("content")
+            .GetString();
+
+        Assert.Contains("Custom prompt", content);
+        Assert.Contains("Lecture: Algebra", content);
+        Assert.Contains("Very useful review", content);
+        Assert.DoesNotContain(ReviewPromptTemplate.LectureContextPlaceholder, content);
+        Assert.DoesNotContain(ReviewPromptTemplate.ReviewTextPlaceholder, content);
+    }
+
+    [Fact]
+    public async Task AnalyzeReviewAsync_ParsesSnakeCaseJsonFromFencedResponse()
+    {
+        var handler = new CapturingHandler("""
+            ```json
+            {"quality_score":0.82,"sentiment":"Положительный","tags":["lecture structure","practical examples"],"is_informative":true}
+            ```
+            """);
+        var http = new HttpClient(handler)
+        {
+            BaseAddress = new Uri("https://llm.test/")
+        };
+        var config = new ConfigurationBuilder()
+            .AddInMemoryCollection(new Dictionary<string, string?>
+            {
+                ["Llm:Model"] = "test-model",
+                ["Llm:ApiKey"] = "test-key"
+            })
+            .Build();
+        var promptService = Substitute.For<IReviewPromptService>();
+        promptService.GetAsync().Returns(new ReviewPromptDto(ReviewPromptTemplate.Default, null));
+        var client = new LlmClient(http, config, promptService, NullLogger<LlmClient>.Instance);
+
+        var result = await client.AnalyzeReviewAsync("Very useful review", "Lecture: Algebra");
+
+        Assert.Equal(0.82, result.QualityScore);
+        Assert.Equal("Положительный", result.Sentiment);
+        Assert.Equal(["lecture structure", "practical examples"], result.Tags);
+        Assert.True(result.IsInformative);
+        Assert.Equal("""
+            ```json
+            {"quality_score":0.82,"sentiment":"Положительный","tags":["lecture structure","practical examples"],"is_informative":true}
+            ```
+            """, result.RawOutput);
+    }
+
+    private static AppDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseInMemoryDatabase($"ReviewPromptServiceTests_{Guid.NewGuid()}")
+            .Options;
+        return new AppDbContext(options);
+    }
+
+    private sealed class CapturingHandler : HttpMessageHandler
+    {
+        private readonly string _analysisContent;
+
+        public CapturingHandler(string? analysisContent = null)
+        {
+            _analysisContent = analysisContent ??
+                "{\"quality_score\":0.8,\"sentiment\":\"Positive\",\"tags\":[\"practice\"],\"is_informative\":true}";
+        }
+
+        public string? RequestBody { get; private set; }
+
+        protected override async Task<HttpResponseMessage> SendAsync(
+            HttpRequestMessage request,
+            CancellationToken cancellationToken)
+        {
+            RequestBody = request.Content is null
+                ? null
+                : await request.Content.ReadAsStringAsync(cancellationToken);
+
+            var responsePayload = JsonSerializer.Serialize(new
+            {
+                choices = new[]
+                {
+                    new
+                    {
+                        message = new
+                        {
+                            content = _analysisContent
+                        }
+                    }
+                }
+            });
+
+            return new HttpResponseMessage(HttpStatusCode.OK)
+            {
+                Content = new StringContent(responsePayload, Encoding.UTF8, "application/json")
+            };
+        }
+    }
+}

backend/UniVerse.Api.Tests/Reviews/ReviewServiceTests.cs

@@ -0,0 +1,145 @@
+using Microsoft.EntityFrameworkCore;
+using NSubstitute;
+using UniVerse.Application.DTOs.Reviews;
+using UniVerse.Application.DTOs.Common;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Entities;
+using UniVerse.Domain.Enums;
+using UniVerse.Domain.Exceptions;
+using UniVerse.Infrastructure.Data;
+using UniVerse.Infrastructure.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Reviews;
+
+public class ReviewServiceTests
+{
+    [Fact]
+    public async Task CreateAsync_EnqueuesReviewAnalysis()
+    {
+        await using var db = CreateDbContext();
+        var queue = Substitute.For<IReviewAnalysisQueue>();
+        var service = CreateService(db, queue);
+        await SeedLectureAsync(db);
+
+        var result = await service.CreateAsync(1, new CreateReviewRequest(1, ReviewRating.Like, "Great lecture"));
+
+        await queue.Received(1).EnqueueAsync(result.Id, Arg.Any<CancellationToken>());
+    }
+
+    [Fact]
+    public async Task UpdateAsync_ResetsAnalysisAndEnqueuesReview()
+    {
+        await using var db = CreateDbContext();
+        var queue = Substitute.For<IReviewAnalysisQueue>();
+        var service = CreateService(db, queue);
+        await SeedAnalyzedReviewAsync(db);
+
+        await service.UpdateAsync(1, 1, new UpdateReviewRequest(ReviewRating.Neutral, "Updated text"));
+
+        var review = await db.Reviews.SingleAsync(r => r.Id == 1);
+        Assert.Equal(ReviewLlmStatus.Pending, review.LlmStatus);
+        Assert.Null(review.Sentiment);
+        Assert.Null(review.QualityScore);
+        Assert.Null(review.IsInformative);
+        Assert.Null(review.LlmTags);
+        Assert.Null(review.LlmRawOutput);
+        await queue.Received(1).EnqueueAsync(1, Arg.Any<CancellationToken>());
+    }
+
+    [Fact]
+    public async Task ReanalyzeAsync_ResetsAnalysisAndEnqueuesReview()
+    {
+        await using var db = CreateDbContext();
+        var queue = Substitute.For<IReviewAnalysisQueue>();
+        var service = CreateService(db, queue);
+        await SeedAnalyzedReviewAsync(db);
+
+        await service.ReanalyzeAsync(1);
+
+        var review = await db.Reviews.SingleAsync(r => r.Id == 1);
+        Assert.Equal(ReviewLlmStatus.Pending, review.LlmStatus);
+        Assert.Null(review.Sentiment);
+        Assert.Null(review.QualityScore);
+        Assert.Null(review.IsInformative);
+        Assert.Null(review.LlmTags);
+        Assert.Null(review.LlmRawOutput);
+        await queue.Received(1).EnqueueAsync(1, Arg.Any<CancellationToken>());
+    }
+
+    [Fact]
+    public async Task GetByLectureAsync_TeacherCannotReadAnotherTeachersReviews()
+    {
+        await using var db = CreateDbContext();
+        var service = CreateService(db, Substitute.For<IReviewAnalysisQueue>());
+        await SeedAnalyzedReviewAsync(db, teacherId: 2);
+
+        await Assert.ThrowsAsync<ForbiddenException>(() =>
+            service.GetByLectureAsync(1, new PaginationRequest(), currentUserId: 1));
+    }
+
+    [Fact]
+    public async Task GetByLectureAsync_AdminCanReadAnyLectureReviews()
+    {
+        await using var db = CreateDbContext();
+        var service = CreateService(db, Substitute.For<IReviewAnalysisQueue>());
+        await SeedAnalyzedReviewAsync(db, teacherId: 2);
+
+        var result = await service.GetByLectureAsync(1, new PaginationRequest(), currentUserId: 1, isAdmin: true);
+
+        Assert.Single(result.Items);
+    }
+
+    private static ReviewService CreateService(AppDbContext db, IReviewAnalysisQueue queue)
+    {
+        var gamification = Substitute.For<IGamificationService>();
+        gamification.CheckAndAwardAchievementsAsync(Arg.Any<int>()).Returns(Task.CompletedTask);
+        return new ReviewService(db, gamification, queue);
+    }
+
+    private static async Task SeedLectureAsync(AppDbContext db, int? teacherId = null)
+    {
+        db.Users.Add(new User { Id = 1, Email = "student@test.local", DisplayName = "Student" });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.Add(new Lecture
+        {
+            Id = 1,
+            CourseId = 1,
+            TeacherId = teacherId,
+            Title = "Lecture",
+            StartsAt = DateTime.UtcNow.AddDays(-1),
+            EndsAt = DateTime.UtcNow.AddDays(-1).AddHours(2),
+            IsOpen = true,
+            MaxEnrollments = 30
+        });
+        await db.SaveChangesAsync();
+    }
+
+    private static async Task SeedAnalyzedReviewAsync(AppDbContext db, int? teacherId = null)
+    {
+        await SeedLectureAsync(db, teacherId);
+        db.Reviews.Add(new Review
+        {
+            Id = 1,
+            LectureId = 1,
+            UserId = 1,
+            Rating = ReviewRating.Like,
+            Text = "Original text",
+            LlmStatus = ReviewLlmStatus.Analyzed,
+            Sentiment = ReviewSentiment.Positive,
+            QualityScore = 0.9,
+            IsInformative = true,
+            LlmTags = ["clear"],
+            LlmRawOutput = "{\"quality_score\":0.9}"
+        });
+        await db.SaveChangesAsync();
+    }
+
+    private static AppDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseInMemoryDatabase($"ReviewServiceTests_{Guid.NewGuid()}")
+            .Options;
+        return new AppDbContext(options);
+    }
+}

backend/UniVerse.Api.Tests/Swagger/SwaggerDocumentTests.cs

@@ -0,0 +1,49 @@
+using System.Net;
+using System.Text.Json;
+using UniVerse.Api.Tests.Helpers;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Swagger;
+
+public class SwaggerDocumentTests : IClassFixture<ApiWebApplicationFactory>
+{
+    private readonly HttpClient _client;
+
+    public SwaggerDocumentTests(ApiWebApplicationFactory factory)
+    {
+        _client = factory.CreateClient();
+    }
+
+    [Fact]
+    public async Task SwaggerJson_IsGenerated()
+    {
+        var response = await _client.GetAsync("api/docs/v1/swagger.json");
+
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+
+        using var document = JsonDocument.Parse(await response.Content.ReadAsStringAsync());
+        var root = document.RootElement;
+
+        Assert.Equal("UniVerse API", root.GetProperty("info").GetProperty("title").GetString());
+        Assert.True(root.GetProperty("components").GetProperty("securitySchemes").TryGetProperty("Bearer", out _));
+    }
+
+    [Fact]
+    public async Task SwaggerJson_DocumentsSecurityOnlyForAuthorizedEndpoints()
+    {
+        using var document = JsonDocument.Parse(await _client.GetStringAsync("api/docs/v1/swagger.json"));
+        var paths = document.RootElement.GetProperty("paths");
+
+        var publicOperation = paths
+            .GetProperty("/api/v1/auth/login/dev")
+            .GetProperty("post");
+        var protectedOperation = paths
+            .GetProperty("/api/v1/users")
+            .GetProperty("get");
+
+        Assert.False(publicOperation.TryGetProperty("security", out _));
+        Assert.True(protectedOperation.TryGetProperty("security", out var security));
+        Assert.Equal("Bearer", security[0].EnumerateObject().Single().Name);
+        Assert.Contains("Required roles:", protectedOperation.GetProperty("description").GetString());
+    }
+}

backend/UniVerse.Api.Tests/Sync/ScheduleSyncServiceTests.cs

@@ -0,0 +1,375 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging.Abstractions;
+using NSubstitute;
+using UniVerse.Application.DTOs.Sync;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Enums;
+using UniVerse.Infrastructure.Data;
+using UniVerse.Infrastructure.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Sync;
+
+public class ScheduleSyncServiceTests
+{
+    private const string EventId = "48102128-2224-4cb9-ae8f-a91d0b7c512a";
+    private const string CourseId = "73aa6226-adbb-4e15-b264-e16fee19fd73";
+    private const string PersonId = "b5a5cad8-60c2-4d94-9972-8a0c2e981440";
+    private const string FullName = "Иванов Иван Иванович";
+
+    [Fact]
+    public async Task SyncScheduleAsync_UsesRoomWorkingCapacityForLectureSeats()
+    {
+        await using var db = CreateDbContext();
+        var modeus = Substitute.For<IModeusApiClient>();
+        modeus.SearchEventsAsync(Arg.Any<SyncScheduleRequest>())
+            .Returns(new ModeusEventsResponse
+            {
+                Embedded = new ModeusEventsEmbedded
+                {
+                    Events =
+                    [
+                        new ModeusEvent
+                        {
+                            Id = "event-1",
+                            Name = "Open lecture",
+                            StartsAt = new DateTime(2026, 5, 13, 9, 0, 0, DateTimeKind.Utc),
+                            EndsAt = new DateTime(2026, 5, 13, 10, 30, 0, DateTimeKind.Utc)
+                        }
+                    ],
+                    EventRooms =
+                    [
+                        new ModeusEventRoom
+                        {
+                            Links = new ModeusEventRoomLinks
+                            {
+                                Event = new ModeusHrefLink("/events/event-1"),
+                                Room = new ModeusHrefLink("/rooms/room-1")
+                            }
+                        }
+                    ],
+                    Rooms =
+                    [
+                        new ModeusRoom("room-1", "Room 101", "101", null, TotalCapacity: 60, WorkingCapacity: 42)
+                    ],
+                    EventTeams =
+                    [
+                        new ModeusEventTeam("event-1", 15)
+                    ]
+                }
+            });
+
+        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);
+
+        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));
+
+        var lecture = await db.Lectures.SingleAsync();
+        Assert.Null(result.Error);
+        Assert.Equal(1, result.Created);
+        Assert.Equal(42, lecture.MaxEnrollments);
+    }
+
+    [Fact]
+    public async Task SyncScheduleAsync_LoadsRoomCapacityWhenEventRoomHasNoCapacity()
+    {
+        await using var db = CreateDbContext();
+        var modeus = Substitute.For<IModeusApiClient>();
+        modeus.SearchEventsAsync(Arg.Any<SyncScheduleRequest>())
+            .Returns(new ModeusEventsResponse
+            {
+                Embedded = new ModeusEventsEmbedded
+                {
+                    Events =
+                    [
+                        new ModeusEvent
+                        {
+                            Id = "event-1",
+                            Name = "Open lecture",
+                            StartsAt = new DateTime(2026, 5, 13, 9, 0, 0, DateTimeKind.Utc),
+                            EndsAt = new DateTime(2026, 5, 13, 10, 30, 0, DateTimeKind.Utc)
+                        }
+                    ],
+                    EventRooms =
+                    [
+                        new ModeusEventRoom
+                        {
+                            Links = new ModeusEventRoomLinks
+                            {
+                                Event = new ModeusHrefLink("/events/event-1"),
+                                Room = new ModeusHrefLink("/rooms/room-1")
+                            }
+                        }
+                    ],
+                    Rooms =
+                    [
+                        new ModeusRoom("room-1", "Room 101", "101", null, TotalCapacity: null, WorkingCapacity: null)
+                    ],
+                    EventTeams =
+                    [
+                        new ModeusEventTeam("event-1", 15)
+                    ]
+                }
+            });
+        modeus.SearchRoomsAsync()
+            .Returns(new ModeusRoomsResponse
+            {
+                Rooms =
+                [
+                    new ModeusRoom("room-1", "Room 101", "101", null, TotalCapacity: 60, WorkingCapacity: 48)
+                ]
+            });
+
+        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);
+
+        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));
+
+        var lecture = await db.Lectures.SingleAsync();
+        Assert.Null(result.Error);
+        Assert.Equal(1, result.Created);
+        Assert.Equal(48, lecture.MaxEnrollments);
+    }
+
+    [Fact]
+    public async Task SyncScheduleAsync_UsesModeusEventAttendeeTeacher()
+    {
+        await using var db = CreateDbContext();
+        var modeus = new FakeModeusApiClient(BuildEventsResponse());
+        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);
+
+        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));
+
+        Assert.Null(result.Error);
+        Assert.Equal(1, result.Created);
+
+        var lecture = await db.Lectures.Include(item => item.Teacher).SingleAsync();
+        Assert.Equal("Иванов Иван Иванович", lecture.Teacher?.DisplayName);
+        Assert.Equal("modeus-b5a5cad8-60c2-4d94-9972-8a0c2e981440@modeus.local", lecture.Teacher?.Email);
+
+        var teacherProfile = await db.TeacherProfiles.Include(item => item.User).SingleAsync();
+        Assert.Equal("b5a5cad8-60c2-4d94-9972-8a0c2e981440", teacherProfile.ModeusId);
+        Assert.Equal(teacherProfile.UserId, lecture.TeacherId);
+
+        var teacherRole = await db.UserRoles.SingleAsync();
+        Assert.Equal(lecture.TeacherId, teacherRole.UserId);
+        Assert.Equal(UserRole.Teacher, teacherRole.Role);
+    }
+
+    [Fact]
+    public async Task SyncScheduleAsync_SavesResolvedTeacherSubId()
+    {
+        await using var db = CreateDbContext();
+        var modeus = new FakeModeusApiClient(BuildEventsResponse(), subId: "sso-sub-1");
+        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);
+
+        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));
+
+        Assert.Null(result.Error);
+        var teacher = await db.Users.Include(user => user.TeacherProfile).SingleAsync();
+        Assert.Equal("sso-sub-1", teacher.MicrosoftId);
+        Assert.Equal($"modeus-{PersonId}@modeus.local", teacher.Email);
+        Assert.Equal(PersonId, teacher.TeacherProfile?.ModeusId);
+    }
+
+    [Fact]
+    public async Task SyncScheduleAsync_UsesPlaceholderWhenSubLookupFails()
+    {
+        await using var db = CreateDbContext();
+        var modeus = new FakeModeusApiClient(BuildEventsResponse(), throwOnSubLookup: true);
+        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);
+
+        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));
+
+        Assert.Null(result.Error);
+        var teacher = await db.Users.Include(user => user.TeacherProfile).SingleAsync();
+        Assert.Null(teacher.MicrosoftId);
+        Assert.Equal($"modeus-{PersonId}@modeus.local", teacher.Email);
+        Assert.Equal(PersonId, teacher.TeacherProfile?.ModeusId);
+    }
+
+    [Fact]
+    public async Task SyncScheduleAsync_AttachesTeacherProfileToExistingSsoUser()
+    {
+        await using var db = CreateDbContext();
+        db.Users.Add(new UniVerse.Domain.Entities.User
+        {
+            Id = 77,
+            Email = "teacher@sfedu.ru",
+            DisplayName = "Old Name",
+            MicrosoftId = "sso-sub-1",
+            Roles = [new UniVerse.Domain.Entities.UserRoleAssignment { UserId = 77, Role = UserRole.Student }]
+        });
+        await db.SaveChangesAsync();
+        var modeus = new FakeModeusApiClient(BuildEventsResponse(), subId: "sso-sub-1");
+        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);
+
+        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));
+
+        Assert.Null(result.Error);
+        Assert.Single(await db.Users.ToListAsync());
+        var teacher = await db.Users.Include(user => user.Roles).Include(user => user.TeacherProfile).SingleAsync();
+        Assert.Equal(77, teacher.Id);
+        Assert.Equal("teacher@sfedu.ru", teacher.Email);
+        Assert.Contains(teacher.Roles, role => role.Role == UserRole.Student);
+        Assert.Contains(teacher.Roles, role => role.Role == UserRole.Teacher);
+        Assert.Equal(PersonId, teacher.TeacherProfile?.ModeusId);
+        Assert.True(await db.Lectures.AnyAsync(lecture => lecture.TeacherId == 77));
+    }
+
+    [Fact]
+    public async Task SyncScheduleAsync_MergesPlaceholderIntoExistingSsoUserOnRetry()
+    {
+        await using var db = CreateDbContext();
+        var placeholder = new UniVerse.Domain.Entities.User
+        {
+            Id = 10,
+            Email = $"modeus-{PersonId}@modeus.local",
+            DisplayName = FullName,
+            Roles = [new UniVerse.Domain.Entities.UserRoleAssignment { UserId = 10, Role = UserRole.Teacher }],
+            TeacherProfile = new UniVerse.Domain.Entities.TeacherProfile { UserId = 10, ModeusId = PersonId }
+        };
+        db.Users.Add(placeholder);
+        db.Users.Add(new UniVerse.Domain.Entities.User
+        {
+            Id = 20,
+            Email = "teacher@sfedu.ru",
+            DisplayName = FullName,
+            MicrosoftId = "sso-sub-1",
+            Roles = [new UniVerse.Domain.Entities.UserRoleAssignment { UserId = 20, Role = UserRole.Student }]
+        });
+        db.Courses.Add(new UniVerse.Domain.Entities.Course { Id = 1, Name = "Course", ExternalId = CourseId, IsSynced = true });
+        db.Lectures.Add(new UniVerse.Domain.Entities.Lecture
+        {
+            Id = 1,
+            CourseId = 1,
+            TeacherId = 10,
+            ExternalId = EventId,
+            Title = "Old",
+            StartsAt = DateTime.UtcNow,
+            EndsAt = DateTime.UtcNow.AddHours(1)
+        });
+        await db.SaveChangesAsync();
+        var modeus = new FakeModeusApiClient(BuildEventsResponse(), subId: "sso-sub-1");
+        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);
+
+        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));
+
+        Assert.Null(result.Error);
+        Assert.Single(await db.Users.ToListAsync());
+        var realUser = await db.Users.Include(user => user.Roles).Include(user => user.TeacherProfile).SingleAsync();
+        Assert.Equal(20, realUser.Id);
+        Assert.Equal(PersonId, realUser.TeacherProfile?.ModeusId);
+        Assert.Contains(realUser.Roles, role => role.Role == UserRole.Teacher);
+        Assert.True(await db.Lectures.AllAsync(lecture => lecture.TeacherId == 20));
+    }
+
+    [Fact]
+    public async Task SyncScheduleAsync_DoesNotLookupSubWhenTeacherAlreadyHasMicrosoftId()
+    {
+        await using var db = CreateDbContext();
+        db.Users.Add(new UniVerse.Domain.Entities.User
+        {
+            Id = 10,
+            Email = "teacher@sfedu.ru",
+            DisplayName = FullName,
+            MicrosoftId = "sso-sub-1",
+            Roles = [new UniVerse.Domain.Entities.UserRoleAssignment { UserId = 10, Role = UserRole.Teacher }],
+            TeacherProfile = new UniVerse.Domain.Entities.TeacherProfile { UserId = 10, ModeusId = PersonId }
+        });
+        await db.SaveChangesAsync();
+        var modeus = Substitute.For<IModeusApiClient>();
+        modeus.SearchEventsAsync(Arg.Any<SyncScheduleRequest>()).Returns(BuildEventsResponse());
+        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);
+
+        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));
+
+        Assert.Null(result.Error);
+        await modeus.DidNotReceive().GetSubIdByFullNameAsync(Arg.Any<string>(), Arg.Any<CancellationToken>());
+    }
+
+    private static AppDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseInMemoryDatabase($"ScheduleSyncTests_{Guid.NewGuid()}")
+            .Options;
+
+        return new AppDbContext(options);
+    }
+
+    private static ModeusEventsResponse BuildEventsResponse()
+    {
+        const string attendeeId = "a894db4e-833f-4f52-a153-fdd7c7d32ca7";
+
+        return new ModeusEventsResponse
+        {
+            Embedded = new ModeusEventsEmbedded
+            {
+                Events =
+                [
+                    new ModeusEvent
+                    {
+                        Id = EventId,
+                        Name = "Тема 20. Управление ресурсами проекта. Часть 2.",
+                        TypeId = "LAB",
+                        StartsAt = new DateTime(2026, 4, 14, 5, 0, 0, DateTimeKind.Utc),
+                        EndsAt = new DateTime(2026, 4, 14, 6, 35, 0, DateTimeKind.Utc),
+                        Links = new ModeusEventLinks
+                        {
+                            CourseUnitRealization = new ModeusHrefLink($"/{CourseId}")
+                        }
+                    }
+                ],
+                CourseUnitRealizations =
+                [
+                    new ModeusCourseUnitRealization(
+                        CourseId,
+                        "Управление проектами разработки программного обеспечения",
+                        "УПРПО")
+                ],
+                EventTeams = [new ModeusEventTeam(EventId, 25)],
+                EventAttendees =
+                [
+                    new ModeusEventAttendee
+                    {
+                        Id = attendeeId,
+                        RoleId = "TEACH",
+                        RoleName = "Преподаватель",
+                        Links = new ModeusEventAttendeeLinks
+                        {
+                            Event = new ModeusHrefLink($"/{EventId}"),
+                            Person = new ModeusHrefLink($"/{PersonId}")
+                        }
+                    }
+                ],
+                Persons =
+                [
+                    new ModeusPerson(
+                        PersonId,
+                        "Иванов",
+                        "Иван",
+                        "Иванович",
+                        FullName)
+                ]
+            }
+        };
+    }
+
+    private sealed class FakeModeusApiClient(
+        ModeusEventsResponse events,
+        string? subId = null,
+        bool throwOnSubLookup = false) : IModeusApiClient
+    {
+        public Task<ModeusEventsResponse> SearchEventsAsync(SyncScheduleRequest request) => Task.FromResult(events);
+
+        public Task<ModeusRoomsResponse> SearchRoomsAsync() => Task.FromResult(new ModeusRoomsResponse());
+
+        public Task<List<ModeusEmployee>> SearchEmployeeAsync(string fullname) => Task.FromResult(new List<ModeusEmployee>());
+
+        public Task<string?> GetSubIdByFullNameAsync(string fullname, CancellationToken cancellationToken = default)
+        {
+            if (throwOnSubLookup)
+                throw new HttpRequestException("lookup failed");
+
+            return Task.FromResult(subId);
+        }
+    }
+}

backend/UniVerse.Api.Tests/UniVerse.Api.Tests.csproj

@@ -0,0 +1,31 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.7" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.4">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\UniVerse.Api\UniVerse.Api.csproj" />
+  </ItemGroup>
+
+</Project>

backend/UniVerse.Api.Tests/Users/UserServiceTests.cs

@@ -0,0 +1,118 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging.Abstractions;
+using NSubstitute;
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Entities;
+using UniVerse.Infrastructure.Data;
+using UniVerse.Infrastructure.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.Users;
+
+public class UserServiceTests
+{
+    [Fact]
+    public async Task GetStatsAsync_ReturnsLevelProgressThresholds()
+    {
+        await using var db = CreateDbContext();
+        SeedLevelThresholds(db);
+        db.Users.Add(new User { Id = 1, Email = "student@test.local", Xp = 120 });
+        await db.SaveChangesAsync();
+        var service = CreateService(db);
+
+        var stats = await service.GetStatsAsync(1);
+
+        Assert.Equal(2, stats.Level);
+        Assert.Equal(100, stats.CurrentLevelXp);
+        Assert.Equal(300, stats.NextLevelXp);
+    }
+
+    [Fact]
+    public async Task GetStatsAsync_ReturnsNullNextLevelAtMaxConfiguredLevel()
+    {
+        await using var db = CreateDbContext();
+        SeedLevelThresholds(db);
+        db.Users.Add(new User { Id = 1, Email = "student@test.local", Xp = 350 });
+        await db.SaveChangesAsync();
+        var service = CreateService(db);
+
+        var stats = await service.GetStatsAsync(1);
+
+        Assert.Equal(3, stats.Level);
+        Assert.Equal(300, stats.CurrentLevelXp);
+        Assert.Null(stats.NextLevelXp);
+    }
+
+    [Fact]
+    public async Task GetStatsAsync_ReturnsEnrollmentSlotStateAndRules()
+    {
+        await using var db = CreateDbContext();
+        SeedLevelThresholds(db);
+        var now = DateTime.UtcNow;
+        db.Users.Add(new User { Id = 1, Email = "student@test.local", Xp = 350 });
+        db.Courses.Add(new Course { Id = 1, Name = "Course" });
+        db.Lectures.AddRange(
+            Lecture(1, now.AddDays(1)),
+            Lecture(2, now.AddDays(2)),
+            Lecture(3, now.AddDays(-1)));
+        db.LectureEnrollments.AddRange(
+            new LectureEnrollment { LectureId = 1, UserId = 1 },
+            new LectureEnrollment { LectureId = 2, UserId = 1 },
+            new LectureEnrollment { LectureId = 3, UserId = 1 });
+        await db.SaveChangesAsync();
+        var service = CreateService(db);
+
+        var stats = await service.GetStatsAsync(1);
+
+        Assert.Equal(3, stats.ActiveEnrollments);
+        Assert.Equal(5, stats.EnrollmentSlotLimit);
+        Assert.Equal(new[] { 1, 3, 4 }, stats.EnrollmentSlotRules.Select(rule => rule.Level));
+        Assert.Equal(new[] { 3, 5, 7 }, stats.EnrollmentSlotRules.Select(rule => rule.Slots));
+    }
+
+    private static AppDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseInMemoryDatabase($"UserServiceTests_{Guid.NewGuid()}")
+            .Options;
+        return new AppDbContext(options);
+    }
+
+    private static UserService CreateService(AppDbContext db)
+    {
+        var notifications = Substitute.For<INotificationService>();
+        notifications.CreateUserNotificationAsync(
+                Arg.Any<int>(),
+                Arg.Any<string>(),
+                Arg.Any<string>(),
+                Arg.Any<string>(),
+                Arg.Any<CancellationToken>())
+            .Returns(callInfo => new UserNotificationDto(1, callInfo.ArgAt<string>(1), callInfo.ArgAt<string>(2), callInfo.ArgAt<string>(3), false, DateTime.UtcNow));
+        notifications.SendAsync(Arg.Any<NotificationMessage>(), Arg.Any<CancellationToken>())
+            .Returns(Task.CompletedTask);
+
+        var gamification = new GamificationService(db, notifications, NullLogger<GamificationService>.Instance);
+        return new UserService(db, gamification);
+    }
+
+    private static void SeedLevelThresholds(AppDbContext db)
+    {
+        db.LevelThresholds.AddRange(
+            new LevelThreshold { Level = 1, RequiredXp = 0 },
+            new LevelThreshold { Level = 2, RequiredXp = 100 },
+            new LevelThreshold { Level = 3, RequiredXp = 300 });
+        db.SaveChanges();
+    }
+
+    private static Lecture Lecture(int id, DateTime startsAt) => new()
+    {
+        Id = id,
+        CourseId = 1,
+        Title = $"Lecture {id}",
+        StartsAt = startsAt,
+        EndsAt = startsAt.AddHours(2),
+        IsOpen = true,
+        MaxEnrollments = 30
+    };
+}

backend/UniVerse.Api/BackgroundServices/AchievementCatalogHostedService.cs

@@ -0,0 +1,17 @@
+using UniVerse.Infrastructure.Data;
+
+namespace UniVerse.Api.BackgroundServices;
+
+public class AchievementCatalogHostedService : IHostedService
+{
+    private readonly IServiceProvider _services;
+
+    public AchievementCatalogHostedService(IServiceProvider services) => _services = services;
+
+    public async Task StartAsync(CancellationToken cancellationToken)
+    {
+        await AchievementCatalogSeeder.SeedAsync(_services, cancellationToken);
+    }
+
+    public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
+}

backend/UniVerse.Api/BackgroundServices/LlmProcessingBackgroundService.cs

@@ -1,36 +0,0 @@
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
-using UniVerse.Application.Interfaces;
-
-namespace UniVerse.Api.BackgroundServices;
-
-public class LlmProcessingBackgroundService : BackgroundService
-{
-    private readonly IServiceProvider _services;
-    private readonly ILogger<LlmProcessingBackgroundService> _logger;
-
-    public LlmProcessingBackgroundService(IServiceProvider services, ILogger<LlmProcessingBackgroundService> logger)
-    {
-        _services = services; _logger = logger;
-    }
-
-    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
-    {
-        _logger.LogInformation("LLM Processing Background Service started");
-        while (!stoppingToken.IsCancellationRequested)
-        {
-            try
-            {
-                using var scope = _services.CreateScope();
-                var llmService = scope.ServiceProvider.GetRequiredService<ILlmAnalysisService>();
-                await llmService.ProcessPendingReviewsAsync();
-            }
-            catch (Exception ex)
-            {
-                _logger.LogError(ex, "Error in LLM processing background service");
-            }
-            await Task.Delay(TimeSpan.FromMinutes(2), stoppingToken);
-        }
-    }
-}

backend/UniVerse.Api/BackgroundServices/ReviewAnalysisQueue.cs

@@ -0,0 +1,21 @@
+using System.Threading.Channels;
+using UniVerse.Application.Interfaces;
+
+namespace UniVerse.Api.BackgroundServices;
+
+public sealed class ReviewAnalysisQueue : IReviewAnalysisQueue
+{
+    private readonly Channel<int> _channel = Channel.CreateUnbounded<int>(new UnboundedChannelOptions
+    {
+        SingleReader = false,
+        SingleWriter = false
+    });
+
+    public async Task EnqueueAsync(int reviewId, CancellationToken cancellationToken = default)
+    {
+        await _channel.Writer.WriteAsync(reviewId, cancellationToken);
+    }
+
+    public IAsyncEnumerable<int> ReadAllAsync(CancellationToken cancellationToken) =>
+        _channel.Reader.ReadAllAsync(cancellationToken);
+}

backend/UniVerse.Api/BackgroundServices/ReviewAnalysisWorker.cs

@@ -0,0 +1,96 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Options;
+using UniVerse.Api.Options;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Enums;
+using UniVerse.Infrastructure.Data;
+
+namespace UniVerse.Api.BackgroundServices;
+
+public sealed class ReviewAnalysisWorker : BackgroundService
+{
+    private readonly IServiceProvider _services;
+    private readonly ReviewAnalysisQueue _queue;
+    private readonly ReviewAnalysisOptions _options;
+    private readonly ILogger<ReviewAnalysisWorker> _logger;
+
+    public ReviewAnalysisWorker(
+        IServiceProvider services,
+        ReviewAnalysisQueue queue,
+        IOptions<ReviewAnalysisOptions> options,
+        ILogger<ReviewAnalysisWorker> logger)
+    {
+        _services = services;
+        _queue = queue;
+        _options = options.Value;
+        _logger = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        var maxConcurrency = Math.Max(1, _options.MaxConcurrentProcessing);
+        _logger.LogInformation(
+            "Review analysis worker started with max concurrency {MaxConcurrency}",
+            maxConcurrency);
+
+        await EnqueueExistingPendingReviewsAsync(stoppingToken);
+
+        var workers = Enumerable.Range(1, maxConcurrency)
+            .Select(workerNumber => ProcessQueueAsync(workerNumber, stoppingToken))
+            .ToArray();
+
+        try
+        {
+            await Task.WhenAll(workers);
+        }
+        catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+        {
+            _logger.LogInformation("Review analysis worker stopped");
+        }
+    }
+
+    private async Task EnqueueExistingPendingReviewsAsync(CancellationToken cancellationToken)
+    {
+        using var scope = _services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+
+        var pendingReviewIds = await db.Reviews
+            .Where(r => r.LlmStatus == ReviewLlmStatus.Pending)
+            .OrderBy(r => r.CreatedAt)
+            .Select(r => r.Id)
+            .ToListAsync(cancellationToken);
+
+        foreach (var reviewId in pendingReviewIds)
+            await _queue.EnqueueAsync(reviewId, cancellationToken);
+
+        if (pendingReviewIds.Count > 0)
+            _logger.LogInformation(
+                "Queued {ReviewCount} pending reviews for immediate analysis",
+                pendingReviewIds.Count);
+    }
+
+    private async Task ProcessQueueAsync(int workerNumber, CancellationToken cancellationToken)
+    {
+        await foreach (var reviewId in _queue.ReadAllAsync(cancellationToken))
+        {
+            try
+            {
+                using var scope = _services.CreateScope();
+                var llmService = scope.ServiceProvider.GetRequiredService<ILlmAnalysisService>();
+                await llmService.AnalyzeReviewAsync(reviewId);
+            }
+            catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(
+                    ex,
+                    "Review analysis worker {WorkerNumber} failed to process review {ReviewId}",
+                    workerNumber,
+                    reviewId);
+            }
+        }
+    }
+}

backend/UniVerse.Api/Controllers/AchievementsController.cs

@@ -5,31 +5,87 @@ using UniVerse.Application.Interfaces;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Управление определениями достижений системы геймификации.</summary>
 [ApiController]
 [Route("api/v1/achievements")]
 [Authorize]
+[Produces("application/json")]
 public class AchievementsController : ControllerBase
 {
     private readonly IAchievementService _achievements;
+
     public AchievementsController(IAchievementService achievements) => _achievements = achievements;
 
+    /// <summary>Получить список всех достижений.</summary>
+    /// <remarks>Возвращает определения достижений (без информации о получении конкретным пользователем).
+    /// Для достижений конкретного пользователя используйте GET /api/v1/users/{id}/achievements.</remarks>
+    /// <response code="200">Список достижений.</response>
+    /// <response code="401">Требуется аутентификация.</response>
     [HttpGet]
+    [ProducesResponseType(typeof(List<AchievementDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
     public async Task<ActionResult> GetAll() => Ok(await _achievements.GetAllAsync());
 
+    /// <summary>Получить достижение по ID.</summary>
+    /// <param name="id">ID достижения.</param>
+    /// <response code="200">Данные достижения.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Достижение не найдено.</response>
     [HttpGet("{id:int}")]
+    [ProducesResponseType(typeof(AchievementDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<AchievementDto>> Get(int id) => Ok(await _achievements.GetByIdAsync(id));
 
+    /// <summary>Создать новое достижение.</summary>
+    /// <remarks>Только Admin. Достижения автоматически присваиваются студентам при выполнении условий.</remarks>
+    /// <param name="req">Название, описание, иконка, награда в XP/монетах и условие получения.</param>
+    /// <response code="201">Достижение создано.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [Authorize(Roles = "Admin")]
     [HttpPost]
+    [ProducesResponseType(typeof(AchievementDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<AchievementDto>> Create([FromBody] CreateAchievementRequest req) =>
         CreatedAtAction(nameof(Get), new { id = 0 }, await _achievements.CreateAsync(req));
 
+    /// <summary>Обновить достижение по ID.</summary>
+    /// <remarks>Только Admin.</remarks>
+    /// <param name="id">ID достижения.</param>
+    /// <param name="req">Обновляемые поля достижения.</param>
+    /// <response code="200">Обновлённые данные достижения.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Достижение не найдено.</response>
     [Authorize(Roles = "Admin")]
     [HttpPut("{id:int}")]
+    [ProducesResponseType(typeof(AchievementDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<AchievementDto>> Update(int id, [FromBody] UpdateAchievementRequest req) =>
         Ok(await _achievements.UpdateAsync(id, req));
 
+    /// <summary>Удалить достижение по ID.</summary>
+    /// <remarks>
+    /// Только Admin. Удаление не отзывает достижение у уже получивших его пользователей.
+    /// </remarks>
+    /// <param name="id">ID достижения.</param>
+    /// <response code="204">Достижение удалено.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Достижение не найдено.</response>
     [Authorize(Roles = "Admin")]
     [HttpDelete("{id:int}")]
-    public async Task<IActionResult> Delete(int id) { await _achievements.DeleteAsync(id); return NoContent(); }
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<IActionResult> Delete(int id)
+    {
+        await _achievements.DeleteAsync(id);
+        return NoContent();
+    }
 }

backend/UniVerse.Api/Controllers/AuthController.cs

@@ -1,37 +1,208 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.WebUtilities;
 using UniVerse.Application.DTOs.Auth;
 using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Enums;
+using System.Security.Cryptography;
 using System.Security.Claims;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Аутентификация и управление сессией пользователя.</summary>
 [ApiController]
 [Route("api/v1/auth")]
+[Produces("application/json")]
 public class AuthController : ControllerBase
 {
     private readonly IAuthService _auth;
-    public AuthController(IAuthService auth) => _auth = auth;
+    private readonly IConfiguration _config;
 
+    private const string MicrosoftStateCookieName    = "msAuthState";
+    private const string MicrosoftReturnUrlCookieName = "msAuthReturnUrl";
+
+    public AuthController(IAuthService auth, IConfiguration config)
+    {
+        _auth   = auth;
+        _config = config;
+    }
+
+    /// <summary>Вход через Microsoft Entra ID (SPA/PKCE flow).</summary>
+    /// <remarks>
+    /// Фронтенд самостоятельно обрабатывает редирект к Microsoft и передаёт сюда
+    /// полученный authorization code. В ответ возвращается пара JWT-токенов;
+    /// refresh token устанавливается в HttpOnly cookie.
+    /// </remarks>
+    /// <param name="request">Authorization code и redirect URI из Microsoft OAuth2.</param>
+    /// <response code="200">Успешный вход — возвращает access token и данные пользователя.</response>
+    /// <response code="400">Неверный или просроченный authorization code.</response>
     [HttpPost("login/microsoft")]
+    [ProducesResponseType(typeof(AuthResponse), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
     public async Task<ActionResult<AuthResponse>> LoginMicrosoft([FromBody] LoginMicrosoftRequest request)
     {
-        var result = await _auth.LoginWithMicrosoftAsync(request.AuthorizationCode);
+        var result = await _auth.LoginWithMicrosoftAsync(request.AuthorizationCode, request.RedirectUri, GetClientIpAddress());
         SetRefreshTokenCookie(result.RefreshToken);
         return Ok(result.Response);
     }
 
+    /// <summary>Инициация server-driven входа через Microsoft (редирект-flow).</summary>
+    /// <remarks>
+    /// Браузер переходит на этот URL; backend строит Microsoft authorize URL с CSRF state
+    /// и редиректит пользователя на `login.microsoftonline.com`.
+    /// После успешного входа Microsoft редиректит на `GET /api/v1/auth/callback/microsoft`.
+    /// </remarks>
+    /// <param name="returnUrl">URL для редиректа после успешного входа (опционально).</param>
+    /// <response code="302">Редирект на Microsoft authorize endpoint.</response>
+    /// <response code="500">Microsoft authentication не настроен (AzureAd:TenantId/ClientId отсутствуют).</response>
+    [HttpGet("login/microsoft")]
+    [AllowAnonymous]
+    [ProducesResponseType(StatusCodes.Status302Found)]
+    [ProducesResponseType(StatusCodes.Status500InternalServerError)]
+    public IActionResult LoginMicrosoftRedirect([FromQuery] string? returnUrl = null)
+    {
+        var tenantId = _config["AzureAd:TenantId"];
+        var clientId = _config["AzureAd:ClientId"];
+        var instance = _config["AzureAd:Instance"] ?? "https://login.microsoftonline.com/";
+
+        if (string.IsNullOrWhiteSpace(tenantId) || string.IsNullOrWhiteSpace(clientId))
+            return Problem("Microsoft authentication is not configured (AzureAd:TenantId/ClientId).", statusCode: StatusCodes.Status500InternalServerError);
+
+        var redirectUri = _config["AzureAd:RedirectUri"] ?? BuildAbsoluteUrl("/api/v1/auth/callback/microsoft");
+
+        var state = Convert.ToBase64String(RandomNumberGenerator.GetBytes(32));
+        Response.Cookies.Append(MicrosoftStateCookieName, state, new CookieOptions
+        {
+            HttpOnly = true,
+            Secure   = Request.IsHttps,
+            SameSite = SameSiteMode.Lax,
+            Expires  = DateTimeOffset.UtcNow.AddMinutes(10)
+        });
+
+        if (!string.IsNullOrWhiteSpace(returnUrl) && IsAllowedReturnUrl(returnUrl))
+        {
+            Response.Cookies.Append(MicrosoftReturnUrlCookieName, returnUrl, new CookieOptions
+            {
+                HttpOnly = true,
+                Secure   = Request.IsHttps,
+                SameSite = SameSiteMode.Lax,
+                Expires  = DateTimeOffset.UtcNow.AddMinutes(10)
+            });
+        }
+
+        var authorizeEndpoint = $"{instance.TrimEnd('/')}/{tenantId}/oauth2/v2.0/authorize";
+        var scope = _config["AzureAd:Scopes"] ?? "openid profile email offline_access User.Read";
+
+        var authorizeUrl = QueryHelpers.AddQueryString(authorizeEndpoint, new Dictionary<string, string?>
+        {
+            ["client_id"]     = clientId,
+            ["response_type"] = "code",
+            ["redirect_uri"]  = redirectUri,
+            ["response_mode"] = "query",
+            ["scope"]         = scope,
+            ["state"]         = state
+        });
+
+        return Redirect(authorizeUrl);
+    }
+
+    /// <summary>OAuth2 callback — обмен code на токены (server-driven flow).</summary>
+    /// <remarks>
+    /// Microsoft редиректит браузер сюда после успешного входа.
+    /// Backend валидирует CSRF state, обменивает code на токены,
+    /// устанавливает refresh token cookie и редиректит на `returnUrl` с access token в URL-фрагменте.
+    /// </remarks>
+    /// <param name="code">Authorization code от Microsoft.</param>
+    /// <param name="state">CSRF state для верификации.</param>
+    /// <param name="error">Код ошибки от Microsoft (если вход не удался).</param>
+    /// <param name="errorDescription">Описание ошибки от Microsoft.</param>
+    /// <response code="302">Успешный вход — редирект на returnUrl с токеном в URL-фрагменте.</response>
+    /// <response code="200">Если returnUrl не задан — возвращает JSON с токенами (удобно для тестирования).</response>
+    /// <response code="400">Отсутствует authorization code.</response>
+    /// <response code="401">Ошибка от Microsoft или невалидный CSRF state.</response>
+    [HttpGet("callback/microsoft")]
+    [AllowAnonymous]
+    [ProducesResponseType(typeof(AuthResponse), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status302Found)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<IActionResult> CallbackMicrosoft(
+        [FromQuery] string? code = null,
+        [FromQuery] string? state = null,
+        [FromQuery] string? error = null,
+        [FromQuery(Name = "error_description")] string? errorDescription = null)
+    {
+        if (!string.IsNullOrEmpty(error))
+        {
+            return Unauthorized(new
+            {
+                error,
+                errorDescription
+            });
+        }
+
+        if (string.IsNullOrWhiteSpace(code))
+            return BadRequest(new { error = "missing_code" });
+
+        var expectedState = Request.Cookies[MicrosoftStateCookieName];
+        if (string.IsNullOrWhiteSpace(expectedState) || string.IsNullOrWhiteSpace(state) || !string.Equals(expectedState, state, StringComparison.Ordinal))
+            return Unauthorized(new { error = "invalid_state" });
+
+        Response.Cookies.Delete(MicrosoftStateCookieName);
+
+        var redirectUri = _config["AzureAd:RedirectUri"] ?? BuildAbsoluteUrl("/api/v1/auth/callback/microsoft");
+
+        var result = await _auth.LoginWithMicrosoftAsync(code, redirectUri, GetClientIpAddress());
+        SetRefreshTokenCookie(result.RefreshToken);
+
+        var returnUrl = Request.Cookies[MicrosoftReturnUrlCookieName] ?? _config["AzureAd:PostLoginRedirectUri"];
+        Response.Cookies.Delete(MicrosoftReturnUrlCookieName);
+
+        if (!string.IsNullOrWhiteSpace(returnUrl) && IsAllowedReturnUrl(returnUrl))
+        {
+            // Put access token in URL fragment so it is not sent as Referer to the backend.
+            // Frontend can read it from location.hash on the landing page.
+            var fragment = $"access_token={Uri.EscapeDataString(result.Response.AccessToken)}&expires_at={Uri.EscapeDataString(result.Response.ExpiresAt.ToString("O"))}";
+            return Redirect($"{returnUrl}#{fragment}");
+        }
+
+        // Useful for manual testing without frontend: you'll see JSON in the browser.
+        return Ok(result.Response);
+    }
+
+    /// <summary>Dev-only вход без OAuth (только в Development-окружении).</summary>
+    /// <remarks>
+    /// Создаёт или находит пользователя по email без реального OAuth flow.
+    /// Возвращает 404 в Production и Staging.
+    /// </remarks>
+    /// <param name="request">Email, отображаемое имя и роль тестового пользователя.</param>
+    /// <response code="200">Успешный вход.</response>
+    /// <response code="404">Endpoint недоступен вне Development.</response>
     [HttpPost("login/dev")]
+    [ProducesResponseType(typeof(AuthResponse), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<AuthResponse>> DevLogin([FromBody] DevLoginRequest request)
     {
         if (!HttpContext.RequestServices.GetRequiredService<IWebHostEnvironment>().IsDevelopment())
             return NotFound();
-        var result = await _auth.DevLoginAsync(request.Email, request.DisplayName, request.Role);
+        var roles = request.Roles?.Count > 0 ? request.Roles : [UserRole.Student];
+        var result = await _auth.DevLoginAsync(request.Email, request.DisplayName, roles, GetClientIpAddress());
         SetRefreshTokenCookie(result.RefreshToken);
         return Ok(result.Response);
     }
 
+    /// <summary>Обновление access token по refresh token из HttpOnly cookie.</summary>
+    /// <remarks>
+    /// Refresh token читается из HttpOnly cookie `refreshToken` (устанавливается при входе).
+    /// Возвращает новую пару токенов и обновляет cookie.
+    /// </remarks>
+    /// <response code="200">Новая пара токенов.</response>
+    /// <response code="401">Refresh token отсутствует, просрочен или отозван.</response>
+    /// <response code="403">Аккаунт деактивирован или refresh token недействителен.</response>
     [HttpPost("refresh")]
+    [ProducesResponseType(typeof(AuthResponse), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<AuthResponse>> Refresh()
     {
         var refreshToken = Request.Cookies["refreshToken"];
@@ -41,8 +212,17 @@ public class AuthController : ControllerBase
         return Ok(result.Response);
     }
 
+    /// <summary>Выход из системы — отзыв refresh token.</summary>
+    /// <remarks>
+    /// Инвалидирует текущий refresh token в БД и удаляет cookie.
+    /// После этого вызова access token остаётся валидным до истечения его TTL (30 минут).
+    /// </remarks>
+    /// <response code="204">Выход выполнен успешно.</response>
+    /// <response code="401">Требуется аутентификация.</response>
     [Authorize]
     [HttpPost("logout")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
     public async Task<IActionResult> Logout()
     {
         var refreshToken = Request.Cookies["refreshToken"];
@@ -52,8 +232,16 @@ public class AuthController : ControllerBase
         return NoContent();
     }
 
+    /// <summary>Получение профиля текущего авторизованного пользователя.</summary>
+    /// <response code="200">Данные текущего пользователя.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Пользователь не найден в БД (рассинхронизация токена).</response>
     [Authorize]
     [HttpGet("me")]
+    [ProducesResponseType(typeof(UniVerse.Application.DTOs.Users.CurrentUserDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult> Me()
     {
         var userId = int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)
@@ -62,6 +250,21 @@ public class AuthController : ControllerBase
         return Ok(user);
     }
 
+    private string? GetClientIpAddress()
+    {
+        if (Request.Headers.TryGetValue("X-Forwarded-For", out var forwardedFor))
+        {
+            var firstForwardedAddress = forwardedFor.ToString().Split(',', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries).FirstOrDefault();
+            if (!string.IsNullOrWhiteSpace(firstForwardedAddress))
+                return firstForwardedAddress;
+        }
+
+        if (Request.Headers.TryGetValue("X-Real-IP", out var realIp) && !string.IsNullOrWhiteSpace(realIp))
+            return realIp;
+
+        return HttpContext.Connection.RemoteIpAddress?.ToString();
+    }
+
     private void SetRefreshTokenCookie(string token)
     {
         Response.Cookies.Append("refreshToken", token, new CookieOptions
@@ -70,4 +273,32 @@ public class AuthController : ControllerBase
             Expires  = DateTime.UtcNow.AddDays(30)
         });
     }
+
+    private string BuildAbsoluteUrl(string path)
+    {
+        if (!path.StartsWith('/')) path = "/" + path;
+        return $"{Request.Scheme}://{Request.Host}{path}";
+    }
+
+    private bool IsAllowedReturnUrl(string returnUrl)
+    {
+        if (Uri.TryCreate(returnUrl, UriKind.Relative, out _))
+            return true;
+
+        if (!Uri.TryCreate(returnUrl, UriKind.Absolute, out var absolute))
+            return false;
+
+        var allowedOrigins = _config.GetSection("Cors:Origins").Get<string[]>() ?? Array.Empty<string>();
+        foreach (var origin in allowedOrigins)
+        {
+            if (!Uri.TryCreate(origin, UriKind.Absolute, out var allowed))
+                continue;
+            if (string.Equals(allowed.Scheme, absolute.Scheme, StringComparison.OrdinalIgnoreCase)
+                && string.Equals(allowed.Host, absolute.Host, StringComparison.OrdinalIgnoreCase)
+                && allowed.Port == absolute.Port)
+                return true;
+        }
+
+        return false;
+    }
 }

backend/UniVerse.Api/Controllers/CoursesController.cs

@@ -1,46 +1,132 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using UniVerse.Application.DTOs.Common;
 using UniVerse.Application.DTOs.Courses;
 using UniVerse.Application.Interfaces;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Управление курсами (дисциплинами) и их тегами.</summary>
 [ApiController]
 [Route("api/v1/courses")]
 [Authorize]
+[Produces("application/json")]
 public class CoursesController : ControllerBase
 {
     private readonly ICourseService _courses;
+
     public CoursesController(ICourseService courses) => _courses = courses;
 
+    /// <summary>Получить список курсов с фильтрацией и пагинацией.</summary>
+    /// <param name="filter">Фильтры: tagId, search, isSynced; параметры пагинации.</param>
+    /// <response code="200">Список курсов (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
     [HttpGet]
+    [ProducesResponseType(typeof(PagedResult<CourseDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
     public async Task<ActionResult> GetAll([FromQuery] CourseFilterRequest filter) =>
         Ok(await _courses.GetAllAsync(filter));
 
+    /// <summary>Получить курс по ID (включая теги).</summary>
+    /// <param name="id">ID курса.</param>
+    /// <response code="200">Данные курса с тегами.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Курс не найден.</response>
     [HttpGet("{id:int}")]
+    [ProducesResponseType(typeof(CourseDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<CourseDto>> Get(int id) => Ok(await _courses.GetByIdAsync(id));
 
+    /// <summary>Создать новый курс.</summary>
+    /// <remarks>Только Admin.</remarks>
+    /// <param name="req">Название и описание курса.</param>
+    /// <response code="201">Курс создан.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [Authorize(Roles = "Admin")]
     [HttpPost]
+    [ProducesResponseType(typeof(CourseDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<CourseDto>> Create([FromBody] CreateCourseRequest req) =>
         CreatedAtAction(nameof(Get), new { id = 0 }, await _courses.CreateAsync(req));
 
+    /// <summary>Обновить курс по ID.</summary>
+    /// <remarks>Только Admin.</remarks>
+    /// <param name="id">ID курса.</param>
+    /// <param name="req">Новое название и/или описание.</param>
+    /// <response code="200">Обновлённые данные курса.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Курс не найден.</response>
     [Authorize(Roles = "Admin")]
     [HttpPut("{id:int}")]
+    [ProducesResponseType(typeof(CourseDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<CourseDto>> Update(int id, [FromBody] UpdateCourseRequest req) =>
         Ok(await _courses.UpdateAsync(id, req));
 
+    /// <summary>Удалить курс по ID.</summary>
+    /// <remarks>Только Admin. Удаление курса каскадно удаляет связанные лекции.</remarks>
+    /// <param name="id">ID курса.</param>
+    /// <response code="204">Курс удалён.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Курс не найден.</response>
     [Authorize(Roles = "Admin")]
     [HttpDelete("{id:int}")]
-    public async Task<IActionResult> Delete(int id) { await _courses.DeleteAsync(id); return NoContent(); }
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<IActionResult> Delete(int id)
+    {
+        await _courses.DeleteAsync(id);
+        return NoContent();
+    }
 
+    /// <summary>Привязать тег к курсу.</summary>
+    /// <remarks>Только Admin. Тег должен существовать в системе.</remarks>
+    /// <param name="id">ID курса.</param>
+    /// <param name="tagId">ID тега.</param>
+    /// <response code="204">Тег привязан.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Курс или тег не найден.</response>
+    /// <response code="409">Тег уже привязан к курсу.</response>
     [Authorize(Roles = "Admin")]
     [HttpPost("{id:int}/tags")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    [ProducesResponseType(StatusCodes.Status409Conflict)]
     public async Task<IActionResult> AddTag(int id, [FromBody] int tagId)
-    { await _courses.AddTagAsync(id, tagId); return NoContent(); }
+    {
+        await _courses.AddTagAsync(id, tagId);
+        return NoContent();
+    }
 
+    /// <summary>Отвязать тег от курса.</summary>
+    /// <remarks>Только Admin.</remarks>
+    /// <param name="id">ID курса.</param>
+    /// <param name="tagId">ID тега.</param>
+    /// <response code="204">Тег отвязан.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Курс или тег не найден, либо связь не существует.</response>
     [Authorize(Roles = "Admin")]
     [HttpDelete("{id:int}/tags/{tagId:int}")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<IActionResult> RemoveTag(int id, int tagId)
-    { await _courses.RemoveTagAsync(id, tagId); return NoContent(); }
+    {
+        await _courses.RemoveTagAsync(id, tagId);
+        return NoContent();
+    }
 }

backend/UniVerse.Api/Controllers/LecturesController.cs

@@ -7,59 +7,203 @@ using System.Security.Claims;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Каталог лекций — просмотр, управление, запись и отзывы.</summary>
 [ApiController]
 [Route("api/v1/lectures")]
 [Authorize]
+[Produces("application/json")]
 public class LecturesController : ControllerBase
 {
     private readonly ILectureService _lectures;
     private readonly IReviewService  _reviews;
+
     public LecturesController(ILectureService lectures, IReviewService reviews)
-    { _lectures = lectures; _reviews = reviews; }
-    private int CurrentUserId => int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier) ?? User.FindFirstValue("sub") ?? "0");
+    {
+        _lectures = lectures;
+        _reviews  = reviews;
+    }
 
+    private int CurrentUserId => int.Parse(
+        User.FindFirstValue(ClaimTypes.NameIdentifier) ?? User.FindFirstValue("sub") ?? "0");
+    private bool CurrentUserIsAdmin => User.IsInRole("Admin");
+
+    /// <summary>Получить каталог лекций с фильтрацией и пагинацией.</summary>
+    /// <param name="filter">
+    /// Фильтры: dateFrom, dateTo, courseId, teacherId, format (Online/Offline),
+    /// isOpen, tagId, search; параметры пагинации.
+    /// </param>
+    /// <remarks>Включает флаг `isEnrolled` — записан ли текущий пользователь на лекцию.</remarks>
+    /// <response code="200">Список лекций (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
     [HttpGet]
+    [ProducesResponseType(typeof(PagedResult<LectureDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
     public async Task<ActionResult> GetAll([FromQuery] LectureFilterRequest filter) =>
-        Ok(await _lectures.GetAllAsync(filter));
+        Ok(await _lectures.GetAllAsync(filter, CurrentUserId));
 
+    /// <summary>Получить детальную карточку лекции по ID.</summary>
+    /// <remarks>
+    /// Включает флаг `isEnrolled` — записан ли текущий пользователь на эту лекцию.
+    /// </remarks>
+    /// <param name="id">ID лекции.</param>
+    /// <response code="200">Детальные данные лекции.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Лекция не найдена.</response>
     [HttpGet("{id:int}")]
+    [ProducesResponseType(typeof(LectureDetailDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult> Get(int id) =>
         Ok(await _lectures.GetByIdAsync(id, CurrentUserId));
 
+    /// <summary>Создать новую лекцию.</summary>
+    /// <remarks>Только Admin. Курс задаётся при создании и не может быть изменён.</remarks>
+    /// <param name="req">Данные лекции: курс, преподаватель, локация, время, формат, вместимость.</param>
+    /// <response code="201">Лекция создана.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [Authorize(Roles = "Admin")]
     [HttpPost]
+    [ProducesResponseType(typeof(LectureDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<LectureDto>> Create([FromBody] CreateLectureRequest req) =>
         CreatedAtAction(nameof(Get), new { id = 0 }, await _lectures.CreateAsync(req));
 
+    /// <summary>Обновить лекцию по ID.</summary>
+    /// <remarks>Admin или Teacher. CourseId изменить нельзя.</remarks>
+    /// <param name="id">ID лекции.</param>
+    /// <param name="req">Обновляемые поля: преподаватель, локация, время, формат, описание.</param>
+    /// <response code="200">Обновлённые данные лекции.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin или Teacher.</response>
+    /// <response code="404">Лекция не найдена.</response>
     [Authorize(Roles = "Admin,Teacher")]
     [HttpPut("{id:int}")]
+    [ProducesResponseType(typeof(LectureDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<LectureDto>> Update(int id, [FromBody] UpdateLectureRequest req) =>
-        Ok(await _lectures.UpdateAsync(id, req));
+        Ok(await _lectures.UpdateAsync(id, req, CurrentUserId, CurrentUserIsAdmin));
 
+    /// <summary>Удалить лекцию по ID.</summary>
+    /// <remarks>Только Admin. Каскадно удаляет записи и отзывы.</remarks>
+    /// <param name="id">ID лекции.</param>
+    /// <response code="204">Лекция удалена.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Лекция не найдена.</response>
     [Authorize(Roles = "Admin")]
     [HttpDelete("{id:int}")]
-    public async Task<IActionResult> Delete(int id) { await _lectures.DeleteAsync(id); return NoContent(); }
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<IActionResult> Delete(int id)
+    {
+        await _lectures.DeleteAsync(id);
+        return NoContent();
+    }
 
+    /// <summary>Записаться на лекцию.</summary>
+    /// <remarks>
+    /// Только Student. Проверяет наличие свободных мест и отсутствие повторной записи.
+    /// После посещения начисляются монеты через gamification.
+    /// </remarks>
+    /// <param name="id">ID лекции.</param>
+    /// <response code="204">Запись выполнена.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Student.</response>
+    /// <response code="404">Лекция не найдена.</response>
+    /// <response code="409">Студент уже записан или мест нет.</response>
     [Authorize(Roles = "Student")]
     [HttpPost("{id:int}/enroll")]
-    public async Task<IActionResult> Enroll(int id) { await _lectures.EnrollAsync(id, CurrentUserId); return NoContent(); }
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    [ProducesResponseType(StatusCodes.Status409Conflict)]
+    public async Task<IActionResult> Enroll(int id)
+    {
+        await _lectures.EnrollAsync(id, CurrentUserId);
+        return NoContent();
+    }
 
+    /// <summary>Отменить запись на лекцию.</summary>
+    /// <remarks>Только Student. Отменить можно только свою запись.</remarks>
+    /// <param name="id">ID лекции.</param>
+    /// <response code="204">Запись отменена.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Student.</response>
+    /// <response code="404">Лекция или запись не найдена.</response>
     [Authorize(Roles = "Student")]
     [HttpDelete("{id:int}/enroll")]
-    public async Task<IActionResult> Unenroll(int id) { await _lectures.UnenrollAsync(id, CurrentUserId); return NoContent(); }
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<IActionResult> Unenroll(int id)
+    {
+        await _lectures.UnenrollAsync(id, CurrentUserId);
+        return NoContent();
+    }
 
+    /// <summary>Отметить посещение студента на лекции.</summary>
+    /// <remarks>
+    /// Admin или Teacher. При отметке `attended=true` начисляются монеты за посещение
+    /// через gamification service.
+    /// </remarks>
+    /// <param name="id">ID лекции.</param>
+    /// <param name="userId">ID студента.</param>
+    /// <param name="attended">true — посетил, false — не посетил.</param>
+    /// <response code="204">Посещение отмечено.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin или Teacher.</response>
+    /// <response code="404">Лекция или запись студента не найдена.</response>
     [Authorize(Roles = "Admin,Teacher")]
     [HttpPatch("{id:int}/attendance/{userId:int}")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<IActionResult> Attendance(int id, int userId, [FromBody] bool attended)
-    { await _lectures.MarkAttendanceAsync(id, userId, attended); return NoContent(); }
+    {
+        await _lectures.MarkAttendanceAsync(id, userId, attended, CurrentUserId, CurrentUserIsAdmin);
+        return NoContent();
+    }
 
+    /// <summary>Получить список записавшихся студентов на лекцию.</summary>
+    /// <remarks>Только Admin или Teacher. Включает флаг посещения (`attended`).</remarks>
+    /// <param name="id">ID лекции.</param>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <response code="200">Список записей (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin или Teacher.</response>
+    /// <response code="404">Лекция не найдена.</response>
     [Authorize(Roles = "Admin,Teacher")]
     [HttpGet("{id:int}/enrollments")]
+    [ProducesResponseType(typeof(PagedResult<EnrollmentDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult> Enrollments(int id, [FromQuery] PaginationRequest pagination) =>
-        Ok(await _lectures.GetEnrollmentsAsync(id, pagination));
+        Ok(await _lectures.GetEnrollmentsAsync(id, pagination, CurrentUserId, CurrentUserIsAdmin));
 
+    /// <summary>Получить отзывы к лекции.</summary>
+    /// <remarks>Только Admin или Teacher.</remarks>
+    /// <param name="id">ID лекции.</param>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <response code="200">Список отзывов (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin или Teacher.</response>
+    /// <response code="404">Лекция не найдена.</response>
+    [Authorize(Roles = "Admin,Teacher")]
     [HttpGet("{id:int}/reviews")]
+    [ProducesResponseType(typeof(PagedResult<UniVerse.Application.DTOs.Reviews.ReviewDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult> Reviews(int id, [FromQuery] PaginationRequest pagination) =>
-        Ok(await _reviews.GetByLectureAsync(id, pagination));
-
+        Ok(await _reviews.GetByLectureAsync(id, pagination, CurrentUserId, CurrentUserIsAdmin));
 }

backend/UniVerse.Api/Controllers/LocationsController.cs

@@ -5,31 +5,85 @@ using UniVerse.Application.Interfaces;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Управление локациями проведения лекций (аудитории, онлайн-площадки).</summary>
 [ApiController]
 [Route("api/v1/locations")]
 [Authorize]
+[Produces("application/json")]
 public class LocationsController : ControllerBase
 {
     private readonly ILocationService _locations;
+
     public LocationsController(ILocationService locations) => _locations = locations;
 
+    /// <summary>Получить список всех локаций.</summary>
+    /// <response code="200">Список локаций.</response>
+    /// <response code="401">Требуется аутентификация.</response>
     [HttpGet]
+    [ProducesResponseType(typeof(List<LocationDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
     public async Task<ActionResult> GetAll() => Ok(await _locations.GetAllAsync());
 
+    /// <summary>Получить локацию по ID.</summary>
+    /// <param name="id">ID локации.</param>
+    /// <response code="200">Данные локации.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Локация не найдена.</response>
     [HttpGet("{id:int}")]
+    [ProducesResponseType(typeof(LocationDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<LocationDto>> Get(int id) => Ok(await _locations.GetByIdAsync(id));
 
+    /// <summary>Создать новую локацию.</summary>
+    /// <remarks>Только Admin. Локации также создаются автоматически при синхронизации с Modeus.</remarks>
+    /// <param name="req">Название, корпус, аудитория и/или адрес.</param>
+    /// <response code="201">Локация создана.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [Authorize(Roles = "Admin")]
     [HttpPost]
+    [ProducesResponseType(typeof(LocationDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<LocationDto>> Create([FromBody] CreateLocationRequest req) =>
         CreatedAtAction(nameof(Get), new { id = 0 }, await _locations.CreateAsync(req));
 
+    /// <summary>Обновить локацию по ID.</summary>
+    /// <remarks>Только Admin.</remarks>
+    /// <param name="id">ID локации.</param>
+    /// <param name="req">Обновляемые поля: название, корпус, аудитория, адрес.</param>
+    /// <response code="200">Обновлённые данные локации.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Локация не найдена.</response>
     [Authorize(Roles = "Admin")]
     [HttpPut("{id:int}")]
+    [ProducesResponseType(typeof(LocationDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<LocationDto>> Update(int id, [FromBody] UpdateLocationRequest req) =>
         Ok(await _locations.UpdateAsync(id, req));
 
+    /// <summary>Удалить локацию по ID.</summary>
+    /// <remarks>
+    /// Только Admin. При удалении локации у связанных лекций поле `locationId` становится null.
+    /// </remarks>
+    /// <param name="id">ID локации.</param>
+    /// <response code="204">Локация удалена.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Локация не найдена.</response>
     [Authorize(Roles = "Admin")]
     [HttpDelete("{id:int}")]
-    public async Task<IActionResult> Delete(int id) { await _locations.DeleteAsync(id); return NoContent(); }
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<IActionResult> Delete(int id)
+    {
+        await _locations.DeleteAsync(id);
+        return NoContent();
+    }
 }

backend/UniVerse.Api/Controllers/NotificationsController.cs

@@ -0,0 +1,94 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using System.Security.Claims;
+using UniVerse.Application.DTOs.Common;
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.Interfaces;
+
+namespace UniVerse.Api.Controllers;
+
+/// <summary>Отправка и планирование уведомлений через доступные каналы.</summary>
+[ApiController]
+[Route("api/v1/notifications")]
+[Authorize]
+[Produces("application/json")]
+public class NotificationsController : ControllerBase
+{
+    private readonly INotificationService _notifications;
+
+    public NotificationsController(INotificationService notifications)
+    {
+        _notifications = notifications;
+    }
+
+    private int CurrentUserId => int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier) ?? User.FindFirstValue("sub") ?? "0");
+
+    /// <summary>Получить уведомления текущего пользователя.</summary>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <param name="cancellationToken">Токен отмены запроса.</param>
+    /// <response code="200">Список уведомлений.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    [HttpGet]
+    [ProducesResponseType(typeof(PagedResult<UserNotificationDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<ActionResult<PagedResult<UserNotificationDto>>> GetMine(
+        [FromQuery] PaginationRequest pagination,
+        CancellationToken cancellationToken) =>
+        Ok(await _notifications.GetUserNotificationsAsync(CurrentUserId, pagination, cancellationToken));
+
+    /// <summary>Отметить все уведомления текущего пользователя как прочитанные.</summary>
+    /// <param name="cancellationToken">Токен отмены запроса.</param>
+    /// <response code="204">Уведомления отмечены прочитанными.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    [HttpPatch("read-all")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<IActionResult> MarkAllRead(CancellationToken cancellationToken)
+    {
+        await _notifications.MarkAllReadAsync(CurrentUserId, cancellationToken);
+        return NoContent();
+    }
+
+    /// <summary>Отправить уведомление немедленно.</summary>
+    /// <remarks>
+    /// Канал задаётся строкой, например `email`. Новые провайдеры добавляются через `INotificationProvider`.
+    /// </remarks>
+    /// <param name="request">Канал, получатель, тема и текст уведомления.</param>
+    /// <response code="202">Уведомление принято к отправке.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    [Authorize(Roles = "Admin")]
+    [HttpPost("send")]
+    [ProducesResponseType(StatusCodes.Status202Accepted)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    public async Task<IActionResult> Send([FromBody] SendNotificationRequest request, CancellationToken cancellationToken)
+    {
+        var message = new NotificationMessage(
+            request.Channel,
+            request.Recipient,
+            request.Subject,
+            request.Body,
+            request.RecipientName,
+            request.Metadata);
+
+        await _notifications.SendAsync(message, cancellationToken);
+        return Accepted();
+    }
+
+    /// <summary>Запланировать отложенную отправку уведомления через Quartz.NET.</summary>
+    /// <param name="request">Уведомление и момент отправки.</param>
+    /// <response code="202">Уведомление поставлено в очередь Quartz.NET.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    [Authorize(Roles = "Admin")]
+    [HttpPost("schedule")]
+    [ProducesResponseType(typeof(ScheduledNotificationResponse), StatusCodes.Status202Accepted)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    public async Task<ActionResult<ScheduledNotificationResponse>> Schedule([FromBody] ScheduleNotificationRequest request, CancellationToken cancellationToken)
+    {
+        var response = await _notifications.ScheduleAsync(request, cancellationToken);
+        return Accepted(response);
+    }
+}

backend/UniVerse.Api/Controllers/ReviewsController.cs

@@ -7,40 +7,161 @@ using System.Security.Claims;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Отзывы студентов на лекции с LLM-анализом и модерацией.</summary>
 [ApiController]
 [Route("api/v1/reviews")]
 [Authorize]
+[Produces("application/json")]
 public class ReviewsController : ControllerBase
 {
     private readonly IReviewService _reviews;
-    public ReviewsController(IReviewService reviews) => _reviews = reviews;
-    private int CurrentUserId => int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier) ?? User.FindFirstValue("sub") ?? "0");
+    private readonly IReviewPromptService _reviewPrompts;
 
+    public ReviewsController(IReviewService reviews, IReviewPromptService reviewPrompts)
+    {
+        _reviews = reviews;
+        _reviewPrompts = reviewPrompts;
+    }
+
+    private int CurrentUserId => int.Parse(
+        User.FindFirstValue(ClaimTypes.NameIdentifier) ?? User.FindFirstValue("sub") ?? "0");
+
+    /// <summary>Создать отзыв к лекции.</summary>
+    /// <remarks>
+    /// Только Student. После создания отзыв отправляется на LLM-анализ
+    /// (статус `Pending`). LLM оценивает содержательность и начисляет монеты
+    /// скрытно от пользователя.
+    /// </remarks>
+    /// <param name="req">ID лекции, оценка (Like/Neutral/Dislike) и текст отзыва.</param>
+    /// <response code="201">Отзыв создан и поставлен в очередь на LLM-анализ.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Student.</response>
+    /// <response code="404">Лекция не найдена.</response>
+    /// <response code="409">Студент уже оставил отзыв к этой лекции.</response>
     [Authorize(Roles = "Student")]
     [HttpPost]
+    [ProducesResponseType(typeof(ReviewDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    [ProducesResponseType(StatusCodes.Status409Conflict)]
     public async Task<ActionResult<ReviewDto>> Create([FromBody] CreateReviewRequest req) =>
         CreatedAtAction(nameof(Get), new { id = 0 }, await _reviews.CreateAsync(CurrentUserId, req));
 
+    /// <summary>Получить список всех отзывов.</summary>
+    /// <remarks>Только Admin. Возвращает все отзывы независимо от LLM-статуса.</remarks>
+    /// <param name="filter">Параметры фильтрации и пагинации.</param>
+    /// <response code="200">Список всех отзывов (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    [Authorize(Roles = "Admin")]
+    [HttpGet]
+    [ProducesResponseType(typeof(PagedResult<ReviewDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    public async Task<ActionResult> List([FromQuery] ReviewFilterRequest filter) =>
+        Ok(await _reviews.GetAllAsync(filter));
+
+    /// <summary>Получить текущий промпт LLM-анализа отзывов.</summary>
+    /// <remarks>Только Admin. Если настройка ещё не сохранена, возвращает базовый промпт.</remarks>
+    /// <response code="200">Текущий шаблон промпта.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    [Authorize(Roles = "Admin")]
+    [HttpGet("llm-prompt")]
+    [ProducesResponseType(typeof(ReviewPromptDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    public async Task<ActionResult<ReviewPromptDto>> GetLlmPrompt() =>
+        Ok(await _reviewPrompts.GetAsync());
+
+    /// <summary>Обновить промпт LLM-анализа отзывов.</summary>
+    /// <remarks>Только Admin. Промпт применяется к следующим анализам и ручным повторам.</remarks>
+    /// <param name="request">Новый шаблон с плейсхолдерами {lectureContext} и {reviewText}.</param>
+    /// <response code="200">Сохранённый шаблон промпта.</response>
+    /// <response code="400">Промпт пустой или не содержит обязательные плейсхолдеры.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    [Authorize(Roles = "Admin")]
+    [HttpPut("llm-prompt")]
+    [ProducesResponseType(typeof(ReviewPromptDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    public async Task<ActionResult<ReviewPromptDto>> UpdateLlmPrompt([FromBody] UpdateReviewPromptRequest request) =>
+        Ok(await _reviewPrompts.UpdateAsync(request));
+
+    /// <summary>Получить отзыв по ID.</summary>
+    /// <remarks>Только Admin или Teacher.</remarks>
+    /// <param name="id">ID отзыва.</param>
+    /// <response code="200">Данные отзыва (включая LLM-статус и сентимент).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin или Teacher.</response>
+    /// <response code="404">Отзыв не найден.</response>
+    [Authorize(Roles = "Admin,Teacher")]
     [HttpGet("{id:int}")]
+    [ProducesResponseType(typeof(ReviewDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<ReviewDto>> Get(int id) => Ok(await _reviews.GetByIdAsync(id));
 
+    /// <summary>Обновить отзыв.</summary>
+    /// <remarks>
+    /// Разрешено любому авторизованному пользователю, но сервис проверяет владельца.
+    /// Изменение текста сбрасывает LLM-статус в `Pending` (повторный анализ).
+    /// </remarks>
+    /// <param name="id">ID отзыва.</param>
+    /// <param name="req">Новая оценка и/или текст.</param>
+    /// <response code="200">Обновлённые данные отзыва.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Отзыв принадлежит другому пользователю.</response>
+    /// <response code="404">Отзыв не найден.</response>
     [HttpPut("{id:int}")]
+    [ProducesResponseType(typeof(ReviewDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<ReviewDto>> Update(int id, [FromBody] UpdateReviewRequest req) =>
         Ok(await _reviews.UpdateAsync(id, CurrentUserId, req));
 
+    /// <summary>Удалить отзыв.</summary>
+    /// <remarks>Владелец может удалить свой отзыв. Admin может удалить любой.</remarks>
+    /// <param name="id">ID отзыва.</param>
+    /// <response code="204">Отзыв удалён.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Нет прав на удаление (не владелец и не Admin).</response>
+    /// <response code="404">Отзыв не найден.</response>
     [HttpDelete("{id:int}")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<IActionResult> Delete(int id)
     {
         await _reviews.DeleteAsync(id, CurrentUserId, User.IsInRole("Admin"));
         return NoContent();
     }
 
-    [Authorize(Roles = "Admin")]
-    [HttpGet("pending")]
-    public async Task<ActionResult> Pending([FromQuery] PaginationRequest pagination) =>
-        Ok(await _reviews.GetPendingAsync(pagination));
-
+    /// <summary>Запустить повторный LLM-анализ отзыва.</summary>
+    /// <remarks>
+    /// Только Admin. Сбрасывает статус отзыва на `Pending` и отправляет его
+    /// на повторную обработку.
+    /// </remarks>
+    /// <param name="id">ID отзыва.</param>
+    /// <response code="204">Повторный анализ запланирован.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Отзыв не найден.</response>
     [Authorize(Roles = "Admin")]
     [HttpPost("{id:int}/reanalyze")]
-    public async Task<IActionResult> Reanalyze(int id) { await _reviews.ReanalyzeAsync(id); return NoContent(); }
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<IActionResult> Reanalyze(int id)
+    {
+        await _reviews.ReanalyzeAsync(id);
+        return NoContent();
+    }
 }

backend/UniVerse.Api/Controllers/SyncController.cs

@@ -5,28 +5,75 @@ using UniVerse.Application.Interfaces;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Синхронизация данных из внешней системы расписания Modeus (только Admin).</summary>
 [ApiController]
 [Route("api/v1/sync")]
 [Authorize(Roles = "Admin")]
+[Produces("application/json")]
 public class SyncController : ControllerBase
 {
     private readonly IScheduleSyncService _sync;
+
     public SyncController(IScheduleSyncService sync) => _sync = sync;
 
+    /// <summary>Запустить синхронизацию расписания лекций из Modeus.</summary>
+    /// <remarks>
+    /// Только Admin. Выполняет upsert лекций и связанных курсов на основе данных
+    /// из внешнего API `schedule.rdcenter.ru`. Поддерживает фильтрацию по периоду,
+    /// размеру выборки, аудиториям, участникам, реализациям курсов/циклов,
+    /// специальностям, годам набора, профилям, учебным планам и типам занятий.
+    /// </remarks>
+    /// <param name="req">Параметры поиска событий во внешнем сервисе расписания.</param>
+    /// <response code="200">Результат синхронизации: кол-во созданных, обновлённых и пропущенных записей.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [HttpPost("schedule")]
+    [ProducesResponseType(typeof(SyncResultDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<SyncResultDto>> SyncSchedule([FromBody] SyncScheduleRequest req) =>
         Ok(await _sync.SyncScheduleAsync(req));
 
+    /// <summary>Получить статус последней синхронизации.</summary>
+    /// <remarks>Только Admin. Возвращает время и результат последней успешной синхронизации.</remarks>
+    /// <response code="200">Статус синхронизации.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [HttpGet("status")]
+    [ProducesResponseType(typeof(SyncStatusDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<SyncStatusDto>> Status() =>
         Ok(await _sync.GetLastSyncStatusAsync());
 
+    /// <summary>Синхронизировать аудитории (локации) из Modeus.</summary>
+    /// <remarks>
+    /// Только Admin. Импортирует аудитории из `schedule.rdcenter.ru` и создаёт
+    /// соответствующие записи в таблице locations.
+    /// </remarks>
+    /// <response code="200">Результат синхронизации аудиторий.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [HttpPost("rooms")]
+    [ProducesResponseType(typeof(SyncResultDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<SyncResultDto>> SyncRooms() =>
         Ok(await _sync.SyncRoomsAsync());
 
+    /// <summary>Поиск преподавателей в Modeus по ФИО.</summary>
+    /// <remarks>
+    /// Только Admin. Ищет преподавателей через внешнее API и возвращает список
+    /// для ручного импорта. Найденные преподаватели не создаются автоматически.
+    /// </remarks>
+    /// <param name="fullname">Полное имя или часть имени преподавателя для поиска.</param>
+    /// <response code="200">Список найденных преподавателей.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [HttpPost("employees")]
+    [ProducesResponseType(typeof(List<EmployeeDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult> SearchEmployees([FromQuery] string fullname) =>
         Ok(await _sync.SearchEmployeesAsync(fullname));
-
 }

backend/UniVerse.Api/Controllers/TagsController.cs

@@ -6,35 +6,101 @@ using UniVerse.Domain.Enums;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Управление тегами для категоризации курсов (институты, факультеты, темы и др.).</summary>
 [ApiController]
 [Route("api/v1/tags")]
 [Authorize]
+[Produces("application/json")]
 public class TagsController : ControllerBase
 {
     private readonly ITagService _tags;
+
     public TagsController(ITagService tags) => _tags = tags;
 
+    /// <summary>Получить список тегов с опциональной фильтрацией по типу и родителю.</summary>
+    /// <param name="type">Тип тега: Institute, Faculty, Subject, Organization, Topic, Other.</param>
+    /// <param name="parentId">ID родительского тега (фильтрация дочерних).</param>
+    /// <response code="200">Список тегов.</response>
+    /// <response code="401">Требуется аутентификация.</response>
     [HttpGet]
+    [ProducesResponseType(typeof(List<TagDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
     public async Task<ActionResult> GetAll([FromQuery] TagType? type, [FromQuery] int? parentId) =>
         Ok(await _tags.GetAllAsync(type, parentId));
 
+    /// <summary>Получить тег по ID.</summary>
+    /// <param name="id">ID тега.</param>
+    /// <response code="200">Данные тега.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Тег не найден.</response>
     [HttpGet("{id:int}")]
+    [ProducesResponseType(typeof(TagDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<TagDto>> Get(int id) => Ok(await _tags.GetByIdAsync(id));
 
+    /// <summary>Получить иерархическое дерево всех тегов.</summary>
+    /// <remarks>
+    /// Возвращает корневые теги с вложенными дочерними тегами.
+    /// Полезно для построения фильтрующих UI-компонентов.
+    /// </remarks>
+    /// <response code="200">Иерархический список тегов.</response>
+    /// <response code="401">Требуется аутентификация.</response>
     [HttpGet("tree")]
+    [ProducesResponseType(typeof(List<TagTreeDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
     public async Task<ActionResult> GetTree() => Ok(await _tags.GetTreeAsync());
 
+    /// <summary>Создать новый тег.</summary>
+    /// <remarks>Только Admin.</remarks>
+    /// <param name="req">Название, тип и опциональный родительский тег.</param>
+    /// <response code="201">Тег создан.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [Authorize(Roles = "Admin")]
     [HttpPost]
+    [ProducesResponseType(typeof(TagDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult<TagDto>> Create([FromBody] CreateTagRequest req) =>
         CreatedAtAction(nameof(Get), new { id = 0 }, await _tags.CreateAsync(req));
 
+    /// <summary>Обновить тег по ID.</summary>
+    /// <remarks>Только Admin.</remarks>
+    /// <param name="id">ID тега.</param>
+    /// <param name="req">Новое название, тип и/или родительский тег.</param>
+    /// <response code="200">Обновлённые данные тега.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Тег не найден.</response>
     [Authorize(Roles = "Admin")]
     [HttpPut("{id:int}")]
+    [ProducesResponseType(typeof(TagDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<TagDto>> Update(int id, [FromBody] UpdateTagRequest req) =>
         Ok(await _tags.UpdateAsync(id, req));
 
+    /// <summary>Удалить тег по ID.</summary>
+    /// <remarks>
+    /// Только Admin. Удаление тега каскадно удаляет привязки к курсам (`course_tags`).
+    /// Дочерние теги остаются, но их `parentId` становится null.
+    /// </remarks>
+    /// <param name="id">ID тега.</param>
+    /// <response code="204">Тег удалён.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Тег не найден.</response>
     [Authorize(Roles = "Admin")]
     [HttpDelete("{id:int}")]
-    public async Task<IActionResult> Delete(int id) { await _tags.DeleteAsync(id); return NoContent(); }
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<IActionResult> Delete(int id)
+    {
+        await _tags.DeleteAsync(id);
+        return NoContent();
+    }
 }

backend/UniVerse.Api/Controllers/UsersController.cs

@@ -8,71 +8,269 @@ using System.Security.Claims;
 
 namespace UniVerse.Api.Controllers;
 
+/// <summary>Управление пользователями, профилями и геймификацией.</summary>
 [ApiController]
 [Route("api/v1/users")]
 [Authorize]
+[Produces("application/json")]
 public class UsersController : ControllerBase
 {
     private readonly IUserService         _users;
     private readonly IReviewService       _reviews;
     private readonly IGamificationService _gamification;
+
     public UsersController(IUserService users, IReviewService reviews, IGamificationService gamification)
     {
         _users = users; _reviews = reviews; _gamification = gamification;
     }
+
     private int CurrentUserId => int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier) ?? User.FindFirstValue("sub") ?? "0");
 
+    private static CurrentUserDto ToCurrentUserDto(UserDto user) => new(
+        user.Id,
+        user.Email,
+        user.DisplayName,
+        user.AvatarUrl,
+        user.Roles,
+        user.Xp,
+        user.Coins,
+        user.Level,
+        user.CreatedAt);
+
+    /// <summary>Получить профиль текущего пользователя.</summary>
+    /// <response code="200">Данные текущего пользователя.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Пользователь не найден.</response>
+    [HttpGet("me")]
+    [ProducesResponseType(typeof(CurrentUserDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<CurrentUserDto>> GetMe() =>
+        Ok(ToCurrentUserDto(await _users.GetByIdAsync(CurrentUserId)));
+
+    /// <summary>Обновить профиль текущего пользователя (displayName, avatarUrl).</summary>
+    /// <param name="req">Обновляемые поля профиля.</param>
+    /// <response code="200">Обновлённые данные текущего пользователя.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Пользователь не найден.</response>
+    [HttpPut("me")]
+    [ProducesResponseType(typeof(CurrentUserDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<CurrentUserDto>> UpdateMe([FromBody] UpdateUserRequest req) =>
+        Ok(ToCurrentUserDto(await _users.UpdateProfileAsync(CurrentUserId, req)));
+
+    /// <summary>Получить статистику текущего пользователя.</summary>
+    /// <response code="200">Статистика текущего пользователя.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Пользователь не найден.</response>
+    [HttpGet("me/stats")]
+    [ProducesResponseType(typeof(UserStatsDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<UserStatsDto>> MyStats() =>
+        Ok(await _users.GetStatsAsync(CurrentUserId));
+
+    /// <summary>Получить список записей текущего пользователя на лекции.</summary>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <response code="200">Список записей (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="404">Пользователь не найден.</response>
+    [HttpGet("me/enrollments")]
+    [ProducesResponseType(typeof(PagedResult<UniVerse.Application.DTOs.Lectures.LectureDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult> MyEnrollments([FromQuery] PaginationRequest pagination) =>
+        Ok(await _users.GetEnrollmentsAsync(CurrentUserId, pagination));
+
+    /// <summary>Получить отзывы текущего пользователя.</summary>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <response code="200">Список отзывов (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    [HttpGet("me/reviews")]
+    [ProducesResponseType(typeof(PagedResult<UniVerse.Application.DTOs.Reviews.ReviewDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<ActionResult> MyReviews([FromQuery] PaginationRequest pagination) =>
+        Ok(await _reviews.GetByUserAsync(CurrentUserId, pagination));
+
+    /// <summary>Получить достижения текущего пользователя.</summary>
+    /// <response code="200">Список полученных достижений.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    [HttpGet("me/achievements")]
+    [ProducesResponseType(typeof(List<UniVerse.Application.DTOs.Achievements.UserAchievementDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<ActionResult> MyAchievements() =>
+        Ok(await _gamification.GetUserAchievementsAsync(CurrentUserId));
+
+    /// <summary>Получить историю транзакций монет текущего пользователя.</summary>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <response code="200">История транзакций (пагинированная).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    [HttpGet("me/transactions")]
+    [ProducesResponseType(typeof(PagedResult<UniVerse.Application.DTOs.Gamification.CoinTransactionDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<ActionResult> MyTransactions([FromQuery] PaginationRequest pagination) =>
+        Ok(await _gamification.GetTransactionsAsync(CurrentUserId, pagination));
+
+    /// <summary>Получить профиль пользователя по ID.</summary>
+    /// <remarks>Только Admin. Для текущего пользователя используйте GET /api/v1/users/me.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <response code="200">Данные пользователя.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Пользователь не найден.</response>
+    [Authorize(Roles = "Admin")]
     [HttpGet("{id:int}")]
+    [ProducesResponseType(typeof(UserDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<UserDto>> Get(int id) => Ok(await _users.GetByIdAsync(id));
 
+    /// <summary>Обновить профиль пользователя (displayName, avatarUrl).</summary>
+    /// <remarks>Только Admin. Для текущего пользователя используйте PUT /api/v1/users/me.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <param name="req">Обновляемые поля профиля.</param>
+    /// <response code="200">Обновлённые данные пользователя.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Пользователь не найден.</response>
+    [Authorize(Roles = "Admin")]
     [HttpPut("{id:int}")]
-    public async Task<ActionResult<UserDto>> Update(int id, [FromBody] UpdateUserRequest req)
-    {
-        if (CurrentUserId != id && !User.IsInRole("Admin")) return Forbid();
-        return Ok(await _users.UpdateProfileAsync(id, req));
-    }
+    [ProducesResponseType(typeof(UserDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<UserDto>> Update(int id, [FromBody] UpdateUserRequest req) =>
+        Ok(await _users.UpdateProfileAsync(id, req));
 
+    /// <summary>Получить статистику пользователя (XP, монеты, уровень, посещения).</summary>
+    /// <remarks>Только Admin. Для текущего пользователя используйте GET /api/v1/users/me/stats.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <response code="200">Статистика пользователя.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Пользователь не найден.</response>
+    [Authorize(Roles = "Admin")]
     [HttpGet("{id:int}/stats")]
+    [ProducesResponseType(typeof(UserStatsDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<UserStatsDto>> Stats(int id) => Ok(await _users.GetStatsAsync(id));
 
+    /// <summary>Получить список записей пользователя на лекции.</summary>
+    /// <remarks>Только Admin. Для текущего пользователя используйте GET /api/v1/users/me/enrollments.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <response code="200">Список записей (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Пользователь не найден.</response>
+    [Authorize(Roles = "Admin")]
     [HttpGet("{id:int}/enrollments")]
-    public async Task<ActionResult> Enrollments(int id, [FromQuery] PaginationRequest pagination)
-    {
-        if (CurrentUserId != id && !User.IsInRole("Admin")) return Forbid();
-        // Delegate to lecture service would be more proper, but returning reviews for now
-        return Ok();
-    }
+    [ProducesResponseType(typeof(PagedResult<UniVerse.Application.DTOs.Lectures.LectureDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult> Enrollments(int id, [FromQuery] PaginationRequest pagination) =>
+        Ok(await _users.GetEnrollmentsAsync(id, pagination));
 
+    /// <summary>Получить отзывы пользователя.</summary>
+    /// <remarks>Только Admin. Для текущего пользователя используйте GET /api/v1/users/me/reviews.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <response code="200">Список отзывов (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    [Authorize(Roles = "Admin")]
     [HttpGet("{id:int}/reviews")]
+    [ProducesResponseType(typeof(PagedResult<UniVerse.Application.DTOs.Reviews.ReviewDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult> Reviews(int id, [FromQuery] PaginationRequest pagination) =>
         Ok(await _reviews.GetByUserAsync(id, pagination));
 
+    /// <summary>Получить достижения пользователя.</summary>
+    /// <remarks>Только Admin. Для текущего пользователя используйте GET /api/v1/users/me/achievements.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <response code="200">Список полученных достижений.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    [Authorize(Roles = "Admin")]
     [HttpGet("{id:int}/achievements")]
+    [ProducesResponseType(typeof(List<UniVerse.Application.DTOs.Achievements.UserAchievementDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult> Achievements(int id) =>
         Ok(await _gamification.GetUserAchievementsAsync(id));
 
+    /// <summary>Получить историю транзакций монет пользователя.</summary>
+    /// <remarks>Только Admin. Для текущего пользователя используйте GET /api/v1/users/me/transactions.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <param name="pagination">Параметры пагинации.</param>
+    /// <response code="200">История транзакций (пагинированная).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    [Authorize(Roles = "Admin")]
     [HttpGet("{id:int}/transactions")]
-    public async Task<ActionResult> Transactions(int id, [FromQuery] PaginationRequest pagination)
-    {
-        if (CurrentUserId != id && !User.IsInRole("Admin")) return Forbid();
-        return Ok(await _gamification.GetTransactionsAsync(id, pagination));
-    }
+    [ProducesResponseType(typeof(PagedResult<UniVerse.Application.DTOs.Gamification.CoinTransactionDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    public async Task<ActionResult> Transactions(int id, [FromQuery] PaginationRequest pagination) =>
+        Ok(await _gamification.GetTransactionsAsync(id, pagination));
 
+    /// <summary>Получить список всех пользователей с фильтрацией и пагинацией.</summary>
+    /// <remarks>Только Admin.</remarks>
+    /// <param name="filter">Параметры фильтрации (поиск, роль, активность) и пагинации.</param>
+    /// <response code="200">Список пользователей (пагинированный).</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
     [Authorize(Roles = "Admin")]
     [HttpGet]
+    [ProducesResponseType(typeof(PagedResult<UserDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
     public async Task<ActionResult> GetAll([FromQuery] UserFilterRequest filter) =>
         Ok(await _users.GetAllAsync(filter));
 
+    /// <summary>Изменить набор ролей пользователя.</summary>
+    /// <remarks>Только Admin. Доступные роли: Student, Teacher, Admin.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <param name="roles">Новый набор ролей пользователя.</param>
+    /// <response code="204">Роли успешно изменены.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Пользователь не найден.</response>
     [Authorize(Roles = "Admin")]
     [HttpPatch("{id:int}/role")]
-    public async Task<IActionResult> SetRole(int id, [FromBody] UserRole role)
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<IActionResult> SetRole(int id, [FromBody] IReadOnlyCollection<UserRole> roles)
     {
-        await _users.SetRoleAsync(id, role);
+        if (roles.Count == 0)
+            return BadRequest("At least one role is required.");
+        await _users.SetRolesAsync(id, roles);
         return NoContent();
     }
 
+    /// <summary>Активировать или деактивировать аккаунт пользователя.</summary>
+    /// <remarks>Только Admin. Деактивированный пользователь не может войти в систему.</remarks>
+    /// <param name="id">ID пользователя.</param>
+    /// <param name="isActive">true — активировать, false — деактивировать.</param>
+    /// <response code="204">Статус успешно изменён.</response>
+    /// <response code="401">Требуется аутентификация.</response>
+    /// <response code="403">Требуется роль Admin.</response>
+    /// <response code="404">Пользователь не найден.</response>
     [Authorize(Roles = "Admin")]
     [HttpPatch("{id:int}/active")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<IActionResult> SetActive(int id, [FromBody] bool isActive)
     {
         await _users.SetActiveAsync(id, isActive);

backend/UniVerse.Api/Filters/AuthorizeOperationFilter.cs

@@ -0,0 +1,81 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.OpenApi;
+using Swashbuckle.AspNetCore.SwaggerGen;
+
+namespace UniVerse.Api.Filters;
+
+/// <summary>
+/// Swagger operation filter that:
+/// 1. Adds Bearer security requirement only to endpoints that actually require authentication.
+/// 2. Appends a "Required roles: ..." remark to the operation description when role restrictions exist.
+///
+/// This replaces the global AddSecurityRequirement approach so anonymous endpoints
+/// (auth/login, auth/refresh, auth/callback) don't show the lock icon in Swagger UI.
+/// </summary>
+public class AuthorizeOperationFilter : IOperationFilter
+{
+    public void Apply(OpenApiOperation operation, OperationFilterContext context)
+    {
+        // Collect [Authorize] and [AllowAnonymous] from both the controller and the action.
+        var actionAttributes     = context.MethodInfo.GetCustomAttributes(inherit: true);
+        var controllerAttributes = context.MethodInfo.DeclaringType?
+            .GetCustomAttributes(inherit: true) ?? [];
+
+        var allAttributes = actionAttributes.Concat(controllerAttributes).ToList();
+
+        var hasAllowAnonymous = allAttributes.OfType<AllowAnonymousAttribute>().Any();
+        if (hasAllowAnonymous)
+            return; // completely public — no lock icon
+
+        var authorizeAttributes = allAttributes.OfType<AuthorizeAttribute>().ToList();
+        if (authorizeAttributes.Count == 0)
+            return; // no [Authorize] at all — also public
+
+        // Collect all distinct roles across all [Authorize(Roles = "...")] attributes.
+        var roles = authorizeAttributes
+            .Where(a => !string.IsNullOrWhiteSpace(a.Roles))
+            .SelectMany(a => a.Roles!.Split(',', StringSplitOptions.TrimEntries))
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .OrderBy(r => r)
+            .ToList();
+
+        // Append role information to the operation description.
+        var roleInfo = roles.Count > 0
+            ? $"**Required roles:** {string.Join(", ", roles)}"
+            : "**Required:** any authenticated user";
+
+        operation.Description = string.IsNullOrWhiteSpace(operation.Description)
+            ? roleInfo
+            : $"{operation.Description}\n\n{roleInfo}";
+
+        operation.Responses ??= new OpenApiResponses();
+
+        // Add 401 / 403 responses if not already declared.
+        if (!operation.Responses.ContainsKey("401"))
+        {
+            operation.Responses.Add("401", new OpenApiResponse
+            {
+                Description = "Unauthorized — JWT token missing or invalid"
+            });
+        }
+
+        if (roles.Count > 0 && !operation.Responses.ContainsKey("403"))
+        {
+            operation.Responses.Add("403", new OpenApiResponse
+            {
+                Description = $"Forbidden — requires role: {string.Join(" or ", roles)}"
+            });
+        }
+
+        // Add Bearer security requirement to this specific operation.
+        // OpenAPI v2 (Microsoft.OpenApi 2.x) uses OpenApiSecuritySchemeReference
+        // instead of OpenApiSecurityScheme with a Reference property.
+        var bearerSchemeRef = new OpenApiSecuritySchemeReference("Bearer", context.Document);
+
+        operation.Security ??= [];
+        operation.Security.Add(new OpenApiSecurityRequirement
+        {
+            [bearerSchemeRef] = []
+        });
+    }
+}

backend/UniVerse.Api/Middleware/ExceptionHandlingMiddleware.cs

@@ -24,6 +24,7 @@ public class ExceptionHandlingMiddleware
     {
         var (statusCode, title) = exception switch
         {
+            BadRequestException => ((int)HttpStatusCode.BadRequest, "Bad Request"),
             NotFoundException => ((int)HttpStatusCode.NotFound, "Not Found"),
             ForbiddenException => ((int)HttpStatusCode.Forbidden, "Forbidden"),
             ConflictException => ((int)HttpStatusCode.Conflict, "Conflict"),

backend/UniVerse.Api/Options/ReviewAnalysisOptions.cs

@@ -0,0 +1,8 @@
+namespace UniVerse.Api.Options;
+
+public class ReviewAnalysisOptions
+{
+    public const string SectionName = "Llm:ReviewAnalysis";
+
+    public int MaxConcurrentProcessing { get; set; } = 1;
+}

backend/UniVerse.Api/Program.cs

@@ -4,16 +4,29 @@ using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.IdentityModel.Tokens;
 using Microsoft.OpenApi;
+using Quartz;
 using Serilog;
 using UniVerse.Api.BackgroundServices;
+using UniVerse.Api.Filters;
 using UniVerse.Api.Middleware;
+using UniVerse.Api.Options;
 using UniVerse.Application.Interfaces;
 using UniVerse.Infrastructure.Services;
 using UniVerse.Infrastructure.Data;
 using UniVerse.Infrastructure.ExternalServices;
+using UniVerse.Infrastructure.Notifications;
 
 var builder = WebApplication.CreateBuilder(args);
 
+var useAspire = builder.Configuration.GetValue<bool>("Aspire:Enabled");
+var isOpenApiGeneration = AppDomain.CurrentDomain.GetAssemblies()
+    .Any(assembly => assembly.GetName().Name == "GetDocument.Insider");
+
+if (useAspire)
+{
+    builder.AddServiceDefaults();
+}
+
 // --- Serilog ---
 Log.Logger = new LoggerConfiguration()
     .ReadFrom.Configuration(builder.Configuration)
@@ -29,7 +42,7 @@ builder.Services.AddDbContext<AppDbContext>(options =>
         npgsql =>
         {
             npgsql.EnableRetryOnFailure(3);
-            npgsql.MigrationsAssembly("UniVerse.Infrastructure");
+            npgsql.MigrationsAssembly("UniVerse.Infrastructure"); // Указывает EF Core, в какой сборке искать/хранить миграции.
         });
 });
 
@@ -50,7 +63,7 @@ builder.Services.AddAuthentication(options =>
         ValidIssuer = builder.Configuration["Jwt:Issuer"],
         ValidAudience = builder.Configuration["Jwt:Audience"],
         IssuerSigningKey = new SymmetricSecurityKey(
-            Encoding.UTF8.GetBytes(builder.Configuration["Jwt:Secret"] ?? "default-dev-secret-key-change-in-production-32chars!!"))
+            Encoding.UTF8.GetBytes(builder.Configuration["Jwt:Secret"]!))
     };
 });
 builder.Services.AddAuthorization();
@@ -77,10 +90,40 @@ builder.Services.AddScoped<ILocationService, LocationService>();
 builder.Services.AddScoped<ICourseService, CourseService>();
 builder.Services.AddScoped<ILectureService, LectureService>();
 builder.Services.AddScoped<IReviewService, ReviewService>();
+builder.Services.AddScoped<IReviewPromptService, ReviewPromptService>();
 builder.Services.AddScoped<IGamificationService, GamificationService>();
 builder.Services.AddScoped<IAchievementService, AchievementService>();
 builder.Services.AddScoped<ILlmAnalysisService, LlmAnalysisService>();
 builder.Services.AddScoped<IScheduleSyncService, ScheduleSyncService>();
+builder.Services.AddScoped<IMicrosoftAuthClient, MicrosoftAuthClient>();
+builder.Services.AddScoped<INotificationService, NotificationService>();
+builder.Services.AddScoped<INotificationProvider, EmailNotificationProvider>();
+builder.Services.AddSingleton<INotificationScheduler, QuartzNotificationScheduler>();
+builder.Services.AddSingleton<ReviewAnalysisQueue>();
+builder.Services.AddSingleton<IReviewAnalysisQueue>(sp => sp.GetRequiredService<ReviewAnalysisQueue>());
+builder.Services.AddTransient<NotificationJob>();
+builder.Services.Configure<EmailNotificationOptions>(builder.Configuration.GetSection("Email:Smtp"));
+builder.Services.AddOptions<ReviewAnalysisOptions>()
+    .Bind(builder.Configuration.GetSection(ReviewAnalysisOptions.SectionName))
+    .Validate(options => options.MaxConcurrentProcessing >= 1,
+        "Llm:ReviewAnalysis:MaxConcurrentProcessing must be greater than or equal to 1.")
+    .ValidateOnStart();
+
+builder.Services.AddQuartz();
+if (!isOpenApiGeneration)
+{
+    builder.Services.AddQuartzHostedService(options =>
+    {
+        options.WaitForJobsToComplete = true;
+    });
+}
+if (builder.Environment.IsDevelopment() && !isOpenApiGeneration)
+{
+    builder.Services.AddQuartzDashboard(options =>
+    {
+        options.ReadOnly = true;
+    });
+}
 
 // --- HTTP Clients ---
 builder.Services.AddHttpClient<ILlmClient, LlmClient>(client =>
@@ -96,7 +139,11 @@ builder.Services.AddHttpClient<IModeusApiClient, ModeusApiClient>(client =>
 });
 
 // --- Background Services ---
-builder.Services.AddHostedService<LlmProcessingBackgroundService>();
+if (!isOpenApiGeneration)
+{
+    builder.Services.AddHostedService<ReviewAnalysisWorker>();
+    builder.Services.AddHostedService<AchievementCatalogHostedService>();
+}
 
 // --- Controllers ---
 builder.Services.AddControllers()
@@ -114,9 +161,16 @@ builder.Services.AddSwaggerGen(options =>
     {
         Title       = "UniVerse API",
         Version     = "v1",
-        Description = "University schedule, reviews, and gamification platform"
+        Description =
+            "REST API веб-платформы UniVerse.\n\n" +
+            "Аутентификация: JWT Bearer (получить через `POST /api/v1/auth/login/microsoft` или `POST /api/v1/auth/login/dev` в Development).",
+        Contact = new OpenApiContact
+        {
+            Name = "UniVerse Dev"
+        }
     });
 
+    // Bearer security scheme definition (used per-endpoint by AuthorizeOperationFilter)
     options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
     {
         Name        = "Authorization",
@@ -124,34 +178,54 @@ builder.Services.AddSwaggerGen(options =>
         Scheme      = "bearer",
         BearerFormat = "JWT",
         In          = ParameterLocation.Header,
-        Description = "Enter your JWT token"
+        Description = "Введите JWT access token, полученный из `/api/v1/auth/login/microsoft`.\n\nПример: `eyJhbGci...`"
     });
 
-    options.AddSecurityRequirement(doc =>
-    {
-        var bearerSchemeRef = new OpenApiSecuritySchemeReference("Bearer", doc, externalResource: null);
-        return new OpenApiSecurityRequirement
-        {
-            [bearerSchemeRef] = new List<string>()
-        };
-    });
+    // Include XML doc comments generated from controller /// summaries
+    var xmlFile = $"{System.Reflection.Assembly.GetExecutingAssembly().GetName().Name}.xml";
+    var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
+    if (File.Exists(xmlPath))
+        options.IncludeXmlComments(xmlPath);
+
+    // Per-endpoint security requirement + role documentation (replaces global AddSecurityRequirement)
+    options.OperationFilter<AuthorizeOperationFilter>();
 });
 
 var app = builder.Build();
 
+if (useAspire)
+{
+    app.MapDefaultEndpoints();
+}
+
 // --- Middleware Pipeline ---
 app.UseMiddleware<RequestLoggingMiddleware>();
 app.UseMiddleware<ExceptionHandlingMiddleware>();
 
 if (app.Environment.IsDevelopment())
 {
-    app.UseSwagger();
-    app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "UniVerse API v1"));
+    app.UseStaticFiles();
+
+    app.UseSwagger(c =>
+    {
+        c.RouteTemplate = "api/docs/{documentName}/swagger.json";
+    });
+
+    app.UseSwaggerUI(c =>
+    {
+        c.RoutePrefix = "api/docs";
+        c.SwaggerEndpoint("v1/swagger.json", "UniVerse API v1");
+    });
 }
 
 app.UseCors();
 app.UseAuthentication();
 app.UseAuthorization();
+if (app.Environment.IsDevelopment())
+{
+    app.UseAntiforgery();
+    app.MapQuartzDashboard();
+}
 app.MapControllers();
 
 app.Run();

backend/UniVerse.Api/Properties/launchSettings.json

@@ -4,7 +4,8 @@
     "http": {
       "commandName": "Project",
       "dotnetRunMessages": true,
-      "launchBrowser": false,
+      "launchBrowser": true,
+      "launchUrl": "api/docs",
       "applicationUrl": "http://localhost:5019",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"

backend/UniVerse.Api/UniVerse.Api.csproj

@@ -7,26 +7,35 @@
         <RootNamespace>UniVerse.Api</RootNamespace>
         <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
         <AllowMissingPrunePackageData>true</AllowMissingPrunePackageData>
+        <GenerateDocumentationFile>true</GenerateDocumentationFile>
+        <OpenApiGenerateDocumentsOnBuild>true</OpenApiGenerateDocumentsOnBuild>
+        <OpenApiDocumentsDirectory>$(BaseIntermediateOutputPath)openapi</OpenApiDocumentsDirectory>
+        <OpenApiGenerateDocumentsOptions>--file-name openapi</OpenApiGenerateDocumentsOptions>
+        <RequiresAspNetWebAssets>true</RequiresAspNetWebAssets>
+        <!-- Suppress warnings for public members without XML docs -->
+        <NoWarn>$(NoWarn);1591</NoWarn>
     </PropertyGroup>
 
     <ItemGroup>
         <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.8" />
-        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.0">
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.7">
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
           <PrivateAssets>all</PrivateAssets>
         </PackageReference>
         <PackageReference Include="Microsoft.Identity.Web" Version="4.9.0" />
         <PackageReference Include="Microsoft.Identity.Web.MicrosoftGraph" Version="4.9.0" />
-        <PackageReference Include="Microsoft.OpenApi" Version="2.4.1" />
+        <PackageReference Include="Quartz.Dashboard" Version="3.18.1" />
         <PackageReference Include="Swashbuckle.AspNetCore" Version="10.1.7" />
-        <PackageReference Include="Serilog.AspNetCore" Version="9.0.0" />
-        <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
-        <PackageReference Include="FluentValidation.AspNetCore" Version="11.3.0" />
+        <PackageReference Include="Serilog.AspNetCore" Version="10.0.0" />
+        <PackageReference Include="Serilog.Sinks.Console" Version="6.1.1" />
+        <PackageReference Include="FluentValidation.AspNetCore" Version="11.3.1" />
+        <PackageReference Include="Quartz.Extensions.Hosting" Version="3.18.1" />
     </ItemGroup>
 
     <ItemGroup>
         <ProjectReference Include="..\UniVerse.Application\UniVerse.Application.csproj" />
         <ProjectReference Include="..\UniVerse.Infrastructure\UniVerse.Infrastructure.csproj" />
+        <ProjectReference Include="..\UniVerse.ServiceDefaults\UniVerse.ServiceDefaults.csproj" />
     </ItemGroup>
 
     <ItemGroup>
@@ -35,4 +44,14 @@
       </Content>
     </ItemGroup>
 
+    <Target
+        Name="CopyGeneratedOpenApiDocument"
+        AfterTargets="Build"
+        Condition="Exists('$(OpenApiDocumentsDirectory)/openapi.json')">
+        <Copy
+            SourceFiles="$(OpenApiDocumentsDirectory)/openapi.json"
+            DestinationFiles="$(MSBuildProjectDirectory)/openapi.json"
+            SkipUnchangedFiles="true" />
+    </Target>
+
 </Project>

backend/UniVerse.Api/appsettings.Development.json

@@ -4,5 +4,23 @@
       "Default": "Information",
       "Microsoft.AspNetCore": "Information"
     }
+  },
+  "ConnectionStrings": {
+    "DefaultConnection": "Host=db;Port=5444;Database=universe;Username=universe;Password=pass"
+  },
+  "Jwt": {
+    "Secret": "default-dev-secret-key-change-in-production-32chars!!",
+    "Issuer": "UniVerse",
+    "Audience": "UniVerse",
+    "AccessTokenExpirationMinutes": "30",
+    "RefreshTokenExpirationDays": "30"
+  },
+  "AzureAd": {
+    "Instance": "https://login.microsoftonline.com/",
+    "TenantId": "sfedu.ru",
+    "ClientId": "",
+    "ClientSecret": "",
+    "Domain": "sfedu.onmicrosoft.com",
+    "CallbackPath": "/signin-oidc"
   }
 }

backend/UniVerse.Api/appsettings.json

@@ -7,16 +7,6 @@
     }
   },
   "AllowedHosts": "*",
-  "ConnectionStrings": {
-    "DefaultConnection": "Host=localhost;Port=5432;Database=universe;Username=postgres;Password=postgres"
-  },
-  "Jwt": {
-    "Secret": "default-dev-secret-key-change-in-production-32chars!!",
-    "Issuer": "UniVerse",
-    "Audience": "UniVerse",
-    "AccessTokenExpirationMinutes": "30",
-    "RefreshTokenExpirationDays": "30"
-  },
   "Cors": {
     "Origins": [
       "http://localhost:5173",
@@ -26,22 +16,33 @@
   "Llm": {
     "BaseUrl": "https://api.openai.com/v1/",
     "ApiKey": "",
-    "Model": "gpt-4o-mini"
+    "Model": "gpt-4o-mini",
+    "ReviewAnalysis": {
+      "MaxConcurrentProcessing": 1
+    }
   },
   "ModeusApi": {
     "BaseUrl": "https://schedule.rdcenter.ru",
     "ApiKey": ""
   },
-  "Gamification": {
-    "XpThresholds": [0, 100, 300, 600, 1000, 1500, 2500, 4000]
-  },
   "Serilog": {
     "MinimumLevel": {
       "Default": "Information",
       "Override": {
-        "Microsoft": "Warning",
-        "System": "Warning"
+        "Microsoft": "Information",
+        "System": "Information"
       }
     }
+  },
+  "Email": {
+    "Smtp": {
+      "Host": "",
+      "Port": 587,
+      "EnableSsl": true,
+      "UserName": "",
+      "Password": "",
+      "FromAddress": "no-reply@universe.local",
+      "FromName": "UniVerse"
+    }
   }
 }

backend/UniVerse.AppHost/AppHost.cs

@@ -0,0 +1,16 @@
+var builder = DistributedApplication.CreateBuilder(args);
+
+var api = builder
+	.AddProject<Projects.UniVerse_Api>("universe-api")
+	.WithEnvironment("Aspire__Enabled", "true");
+
+// Запуск фронтенда (Vue + Vite) в dev-режиме вместе.
+// Требования: установлен pnpm (или включён corepack), зависимости фронта установлены.
+builder
+	.AddExecutable("universe-frontend", "pnpm", workingDirectory: "../../frontend")
+	.WithArgs("run", "dev:aspire")
+	.WithHttpEndpoint(targetPort: 5173, port: 5173, name: "http", isProxied: false)
+	// Используется в vite.config.ts для server.proxy['/api'].target
+	.WithEnvironment("VITE_API_PROXY_TARGET", api.GetEndpoint("http"));
+
+builder.Build().Run();

backend/UniVerse.AppHost/Properties/launchSettings.json

@@ -0,0 +1,48 @@
+{
+  "$schema": "https://json.schemastore.org/launchsettings.json",
+  "profiles": {
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://127.0.0.1:17156;http://127.0.0.1:15060",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development",
+        "DOTNET_ENVIRONMENT": "Development",
+        "HTTP_PROXY": "",
+        "HTTPS_PROXY": "",
+        "ALL_PROXY": "",
+        "http_proxy": "",
+        "https_proxy": "",
+        "all_proxy": "",
+        "NO_PROXY": "localhost,127.0.0.1,::1",
+        "no_proxy": "localhost,127.0.0.1,::1",
+        "ASPIRE_DASHBOARD_OTLP_ENDPOINT_URL": "https://127.0.0.1:21010",
+        "ASPIRE_DASHBOARD_MCP_ENDPOINT_URL": "https://127.0.0.1:23046",
+        "ASPIRE_RESOURCE_SERVICE_ENDPOINT_URL": "https://127.0.0.1:22274"
+      }
+    },
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://127.0.0.1:15060",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development",
+        "DOTNET_ENVIRONMENT": "Development",
+        "ASPIRE_ALLOW_UNSECURED_TRANSPORT": "true",
+        "HTTP_PROXY": "",
+        "HTTPS_PROXY": "",
+        "ALL_PROXY": "",
+        "http_proxy": "",
+        "https_proxy": "",
+        "all_proxy": "",
+        "NO_PROXY": "localhost,127.0.0.1,::1",
+        "no_proxy": "localhost,127.0.0.1,::1",
+        "ASPIRE_DASHBOARD_OTLP_ENDPOINT_URL": "http://127.0.0.1:19138",
+        "ASPIRE_DASHBOARD_MCP_ENDPOINT_URL": "http://127.0.0.1:18238",
+        "ASPIRE_RESOURCE_SERVICE_ENDPOINT_URL": "http://127.0.0.1:20274"
+      }
+    }
+  }
+}

backend/UniVerse.AppHost/UniVerse.AppHost.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Aspire.AppHost.Sdk/13.2.2">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net10.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <UserSecretsId>fb90d29a-6c48-471b-b19f-d2f431a5ef38</UserSecretsId>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\UniVerse.Api\UniVerse.Api.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Aspire.Hosting.AppHost" Version="13.2.2" />
+    </ItemGroup>
+
+</Project>

backend/UniVerse.AppHost/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

backend/UniVerse.AppHost/appsettings.json

@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning",
+      "Aspire.Hosting.Dcp": "Warning"
+    }
+  }
+}

backend/UniVerse.AppHost/aspire.config.json

@@ -0,0 +1,5 @@
+{
+  "appHost": {
+    "path": "UniVerse.AppHost.csproj"
+  }
+}

backend/UniVerse.Application/DTOs/Auth/AuthDtos.cs

@@ -5,8 +5,8 @@ namespace UniVerse.Application.DTOs.Auth;
 public record AuthResponse(string AccessToken, DateTime ExpiresAt, UserAuthDto User);
 public record AuthResult(AuthResponse Response, string RefreshToken);
 
-public record UserAuthDto(int Id, string Email, string? DisplayName, UserRole Role);
+public record UserAuthDto(int Id, string Email, string? DisplayName, IReadOnlyList<UserRole> Roles);
 
-public record LoginMicrosoftRequest(string AuthorizationCode);
+public record LoginMicrosoftRequest(string AuthorizationCode, string? RedirectUri = null);
 
-public record DevLoginRequest(string Email, string? DisplayName = null, UserRole Role = UserRole.Student);
+public record DevLoginRequest(string Email, string? DisplayName = null, IReadOnlyList<UserRole>? Roles = null);

backend/UniVerse.Application/DTOs/Gamification/GamificationDtos.cs

@@ -11,3 +11,8 @@ public record CoinTransactionDto(
     string? Description,
     DateTime CreatedAt
 );
+
+public record LevelProgressDto(
+    int CurrentLevelXp,
+    int? NextLevelXp
+);

backend/UniVerse.Application/DTOs/Lectures/LectureDtos.cs

@@ -19,7 +19,8 @@ public record LectureDto(
     int MaxEnrollments,
     int EnrollmentsCount,
     string? OnlineUrl,
-    DateTime CreatedAt
+    DateTime CreatedAt,
+    bool IsEnrolled = false
 );
 
 public record LectureDetailDto(

backend/UniVerse.Application/DTOs/Notifications/NotificationDtos.cs

@@ -0,0 +1,42 @@
+namespace UniVerse.Application.DTOs.Notifications;
+
+public static class NotificationChannels
+{
+    public const string Email = "email";
+}
+
+public record NotificationMessage(
+    string Channel,
+    string Recipient,
+    string Subject,
+    string Body,
+    string? RecipientName = null,
+    IReadOnlyDictionary<string, string>? Metadata = null);
+
+public record SendNotificationRequest(
+    string Channel,
+    string Recipient,
+    string Subject,
+    string Body,
+    string? RecipientName = null,
+    IReadOnlyDictionary<string, string>? Metadata = null);
+
+public record ScheduleNotificationRequest(
+    string Channel,
+    string Recipient,
+    string Subject,
+    string Body,
+    DateTimeOffset SendAt,
+    string? RecipientName = null,
+    IReadOnlyDictionary<string, string>? Metadata = null);
+
+public record ScheduledNotificationResponse(string JobId, DateTimeOffset SendAt);
+
+public record UserNotificationDto(
+    int Id,
+    string Type,
+    string Title,
+    string Body,
+    bool IsRead,
+    DateTime CreatedAt
+);

backend/UniVerse.Application/DTOs/Reviews/ReviewDtos.cs

@@ -15,9 +15,20 @@ public record ReviewDto(
     double? QualityScore,
     bool? IsInformative,
     string[]? LlmTags,
+    string? LlmRawOutput,
     DateTime CreatedAt
 );
 
 public record CreateReviewRequest(int LectureId, ReviewRating Rating, string? Text);
 
 public record UpdateReviewRequest(ReviewRating Rating, string? Text);
+
+public record ReviewFilterRequest(
+    ReviewLlmStatus? LlmStatus,
+    int Page = 1,
+    int PageSize = 20
+);
+
+public record ReviewPromptDto(string Prompt, DateTime? UpdatedAt);
+
+public record UpdateReviewPromptRequest(string Prompt);

backend/UniVerse.Application/DTOs/Sync/SyncDtos.cs

@@ -1,13 +1,27 @@
 namespace UniVerse.Application.DTOs.Sync;
 
 public record SyncScheduleRequest(
-    string? SpecialtyCode,
+    IReadOnlyList<string>? SpecialtyCode,
     DateTime? TimeMin,
     DateTime? TimeMax,
-    string? TypeId
+    IReadOnlyList<string>? TypeId,
+    int? Size = null,
+    IReadOnlyList<string>? RoomId = null,
+    IReadOnlyList<string>? AttendeePersonId = null,
+    IReadOnlyList<string>? CourseUnitRealizationId = null,
+    IReadOnlyList<string>? CycleRealizationId = null,
+    IReadOnlyList<int>? LearningStartYear = null,
+    IReadOnlyList<string>? ProfileName = null,
+    IReadOnlyList<string>? CurriculumId = null
 );
 
-public record SyncResultDto(int Created, int Updated, int Skipped, string? Error);
+public record SyncResultDto(
+    int Created,
+    int Updated,
+    int Skipped,
+    string? Error,
+    IReadOnlyList<string>? Details = null
+);
 
 public record SyncStatusDto(DateTime? LastSyncAt, string Status, SyncResultDto? LastResult);
 

backend/UniVerse.Application/DTOs/Users/UserDtos.cs

@@ -7,7 +7,7 @@ public record UserDto(
     string Email,
     string? DisplayName,
     string? AvatarUrl,
-    UserRole Role,
+    IReadOnlyList<UserRole> Roles,
     bool IsActive,
     int Xp,
     int Coins,
@@ -15,6 +15,18 @@ public record UserDto(
     DateTime CreatedAt
 );
 
+public record CurrentUserDto(
+    int Id,
+    string Email,
+    string? DisplayName,
+    string? AvatarUrl,
+    IReadOnlyList<UserRole> Roles,
+    int Xp,
+    int Coins,
+    int Level,
+    DateTime CreatedAt
+);
+
 public record UserStatsDto(
     int TotalLectures,
     int AttendedLectures,
@@ -22,9 +34,16 @@ public record UserStatsDto(
     int Xp,
     int Coins,
     int Level,
-    int AchievementsCount
+    int AchievementsCount,
+    int CurrentLevelXp,
+    int? NextLevelXp,
+    int ActiveEnrollments,
+    int EnrollmentSlotLimit,
+    IReadOnlyList<EnrollmentSlotRuleDto> EnrollmentSlotRules
 );
 
+public record EnrollmentSlotRuleDto(int Level, int Slots);
+
 public record UpdateUserRequest(
     string? DisplayName,
     string? AvatarUrl

backend/UniVerse.Application/Interfaces/IAuthService.cs

@@ -5,9 +5,9 @@ namespace UniVerse.Application.Interfaces;
 
 public interface IAuthService
 {
-    Task<AuthResult> LoginWithMicrosoftAsync(string authorizationCode);
-    Task<AuthResult> DevLoginAsync(string email, string? displayName, Domain.Enums.UserRole role);
+    Task<AuthResult> LoginWithMicrosoftAsync(string authorizationCode, string? redirectUri = null, string? ipAddress = null);
+    Task<AuthResult> DevLoginAsync(string email, string? displayName, IReadOnlyCollection<Domain.Enums.UserRole> roles, string? ipAddress = null);
     Task<AuthResult> RefreshTokenAsync(string refreshToken);
     Task RevokeRefreshTokenAsync(string refreshToken);
-    Task<UserDto> GetCurrentUserAsync(int userId);
+    Task<CurrentUserDto> GetCurrentUserAsync(int userId);
 }

backend/UniVerse.Application/Interfaces/IGamificationService.cs

@@ -10,7 +10,8 @@ public interface IGamificationService
     Task AwardCoinsAsync(int userId, int amount, CoinTransactionType type,
         int? reviewId = null, int? achievementId = null, string? description = null);
     Task CheckAndAwardAchievementsAsync(int userId);
-    int CalculateLevel(int xp);
+    Task<int> CalculateLevelAsync(int xp);
+    Task<LevelProgressDto> GetLevelProgressAsync(int xp);
     Task<List<UserAchievementDto>> GetUserAchievementsAsync(int userId);
     Task<PagedResult<CoinTransactionDto>> GetTransactionsAsync(int userId, PaginationRequest pagination);
 }

backend/UniVerse.Application/Interfaces/ILectureService.cs

@@ -5,13 +5,13 @@ namespace UniVerse.Application.Interfaces;
 
 public interface ILectureService
 {
-    Task<PagedResult<LectureDto>> GetAllAsync(LectureFilterRequest filter);
+    Task<PagedResult<LectureDto>> GetAllAsync(LectureFilterRequest filter, int? currentUserId = null);
     Task<LectureDetailDto> GetByIdAsync(int id, int? currentUserId = null);
     Task<LectureDto> CreateAsync(CreateLectureRequest request);
-    Task<LectureDto> UpdateAsync(int id, UpdateLectureRequest request);
+    Task<LectureDto> UpdateAsync(int id, UpdateLectureRequest request, int currentUserId, bool isAdmin = false);
     Task DeleteAsync(int id);
     Task EnrollAsync(int lectureId, int userId);
     Task UnenrollAsync(int lectureId, int userId);
-    Task MarkAttendanceAsync(int lectureId, int userId, bool attended);
-    Task<PagedResult<EnrollmentDto>> GetEnrollmentsAsync(int lectureId, PaginationRequest pagination);
+    Task MarkAttendanceAsync(int lectureId, int userId, bool attended, int currentUserId, bool isAdmin = false);
+    Task<PagedResult<EnrollmentDto>> GetEnrollmentsAsync(int lectureId, PaginationRequest pagination, int currentUserId, bool isAdmin = false);
 }

backend/UniVerse.Application/Interfaces/ILlmAnalysisService.cs

@@ -3,5 +3,4 @@ namespace UniVerse.Application.Interfaces;
 public interface ILlmAnalysisService
 {
     Task AnalyzeReviewAsync(int reviewId);
-    Task ProcessPendingReviewsAsync();
 }

backend/UniVerse.Application/Interfaces/ILlmClient.cs

@@ -4,7 +4,8 @@ public record LlmReviewAnalysis(
     double QualityScore,
     string Sentiment,
     string[] Tags,
-    bool IsInformative
+    bool IsInformative,
+    string RawOutput
 );
 
 public interface ILlmClient

backend/UniVerse.Application/Interfaces/IMicrosoftAuthClient.cs

@@ -0,0 +1,11 @@
+namespace UniVerse.Application.Interfaces;
+
+public interface IMicrosoftAuthClient
+{
+    Task<MicrosoftTokenResult> ExchangeAuthorizationCodeAsync(
+        string authorizationCode,
+        string redirectUri,
+        CancellationToken cancellationToken = default);
+}
+
+public record MicrosoftTokenResult(string IdToken);

backend/UniVerse.Application/Interfaces/INotificationProvider.cs

@@ -0,0 +1,9 @@
+using UniVerse.Application.DTOs.Notifications;
+
+namespace UniVerse.Application.Interfaces;
+
+public interface INotificationProvider
+{
+    string Channel { get; }
+    Task SendAsync(NotificationMessage message, CancellationToken cancellationToken = default);
+}

backend/UniVerse.Application/Interfaces/INotificationScheduler.cs

@@ -0,0 +1,14 @@
+using UniVerse.Application.DTOs.Notifications;
+
+namespace UniVerse.Application.Interfaces;
+
+public interface INotificationScheduler
+{
+    Task<ScheduledNotificationResponse> ScheduleAsync(
+        NotificationMessage message,
+        DateTimeOffset sendAt,
+        string? jobId = null,
+        CancellationToken cancellationToken = default);
+
+    Task CancelAsync(string jobId, CancellationToken cancellationToken = default);
+}

backend/UniVerse.Application/Interfaces/INotificationService.cs

@@ -0,0 +1,13 @@
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.DTOs.Common;
+
+namespace UniVerse.Application.Interfaces;
+
+public interface INotificationService
+{
+    Task SendAsync(NotificationMessage message, CancellationToken cancellationToken = default);
+    Task<ScheduledNotificationResponse> ScheduleAsync(ScheduleNotificationRequest request, CancellationToken cancellationToken = default);
+    Task<UserNotificationDto> CreateUserNotificationAsync(int userId, string type, string title, string body, CancellationToken cancellationToken = default);
+    Task<PagedResult<UserNotificationDto>> GetUserNotificationsAsync(int userId, PaginationRequest pagination, CancellationToken cancellationToken = default);
+    Task MarkAllReadAsync(int userId, CancellationToken cancellationToken = default);
+}

backend/UniVerse.Application/Interfaces/IReviewAnalysisQueue.cs

@@ -0,0 +1,6 @@
+namespace UniVerse.Application.Interfaces;
+
+public interface IReviewAnalysisQueue
+{
+    Task EnqueueAsync(int reviewId, CancellationToken cancellationToken = default);
+}

backend/UniVerse.Application/Interfaces/IReviewPromptService.cs

@@ -0,0 +1,9 @@
+using UniVerse.Application.DTOs.Reviews;
+
+namespace UniVerse.Application.Interfaces;
+
+public interface IReviewPromptService
+{
+    Task<ReviewPromptDto> GetAsync();
+    Task<ReviewPromptDto> UpdateAsync(UpdateReviewPromptRequest request);
+}

backend/UniVerse.Application/Interfaces/IReviewService.cs

@@ -9,8 +9,8 @@ public interface IReviewService
     Task<ReviewDto> GetByIdAsync(int id);
     Task<ReviewDto> UpdateAsync(int id, int userId, UpdateReviewRequest request);
     Task DeleteAsync(int id, int userId, bool isAdmin = false);
-    Task<PagedResult<ReviewDto>> GetByLectureAsync(int lectureId, PaginationRequest pagination);
+    Task<PagedResult<ReviewDto>> GetByLectureAsync(int lectureId, PaginationRequest pagination, int? currentUserId = null, bool isAdmin = false);
     Task<PagedResult<ReviewDto>> GetByUserAsync(int userId, PaginationRequest pagination);
-    Task<PagedResult<ReviewDto>> GetPendingAsync(PaginationRequest pagination);
+    Task<PagedResult<ReviewDto>> GetAllAsync(ReviewFilterRequest filter);
     Task ReanalyzeAsync(int id);
 }

backend/UniVerse.Application/Interfaces/IScheduleSyncService.cs

@@ -1,4 +1,5 @@
 using UniVerse.Application.DTOs.Sync;
+using System.Text.Json.Serialization;
 
 namespace UniVerse.Application.Interfaces;
 
@@ -15,11 +16,102 @@ public interface IModeusApiClient
     Task<ModeusEventsResponse> SearchEventsAsync(SyncScheduleRequest request);
     Task<ModeusRoomsResponse> SearchRoomsAsync();
     Task<List<ModeusEmployee>> SearchEmployeeAsync(string fullname);
+    Task<string?> GetSubIdByFullNameAsync(string fullname, CancellationToken cancellationToken = default);
 }
 
 // Modeus API response models
-public record ModeusEvent(string Id, string Name, DateTime StartsAt, DateTime EndsAt, string? RoomId, string? TeacherId, string? TypeId);
-public record ModeusEventsResponse(List<ModeusEvent> Events);
-public record ModeusRoom(string Id, string Name, string? Building);
-public record ModeusRoomsResponse(List<ModeusRoom> Rooms);
+public class ModeusEvent
+{
+    public string Id { get; init; } = string.Empty;
+    public string Name { get; init; } = string.Empty;
+    public string? NameShort { get; init; }
+    public string? Description { get; init; }
+    public string? TypeId { get; init; }
+    public DateTime StartsAt { get; init; }
+    public DateTime EndsAt { get; init; }
+
+    [JsonPropertyName("_links")]
+    public ModeusEventLinks? Links { get; init; }
+}
+
+public class ModeusEventLinks
+{
+    [JsonPropertyName("course-unit-realization")]
+    public ModeusHrefLink? CourseUnitRealization { get; init; }
+}
+
+public class ModeusEventsResponse
+{
+    [JsonPropertyName("_embedded")]
+    public ModeusEventsEmbedded? Embedded { get; init; }
+    public List<ModeusEvent>? Events { get; init; }
+    public ModeusPage? Page { get; init; }
+
+    [JsonIgnore]
+    public IReadOnlyList<ModeusEvent> EventItems => Embedded?.Events ?? Events ?? [];
+}
+public class ModeusEventsEmbedded
+{
+    public List<ModeusEvent>? Events { get; init; }
+
+    [JsonPropertyName("course-unit-realizations")]
+    public List<ModeusCourseUnitRealization>? CourseUnitRealizations { get; init; }
+
+    [JsonPropertyName("event-rooms")]
+    public List<ModeusEventRoom>? EventRooms { get; init; }
+
+    [JsonPropertyName("event-teams")]
+    public List<ModeusEventTeam>? EventTeams { get; init; }
+
+    [JsonPropertyName("event-attendees")]
+    public List<ModeusEventAttendee>? EventAttendees { get; init; }
+
+    public List<ModeusPerson>? Persons { get; init; }
+
+    public List<ModeusRoom>? Rooms { get; init; }
+}
+public record ModeusHrefLink(string? Href);
+public record ModeusCourseUnitRealization(string Id, string Name, string? NameShort);
+public class ModeusEventRoom
+{
+    public string Id { get; init; } = string.Empty;
+
+    [JsonPropertyName("_links")]
+    public ModeusEventRoomLinks? Links { get; init; }
+}
+public class ModeusEventRoomLinks
+{
+    public ModeusHrefLink? Event { get; init; }
+    public ModeusHrefLink? Room { get; init; }
+}
+public record ModeusEventTeam(string EventId, int? Size);
+public class ModeusEventAttendee
+{
+    public string Id { get; init; } = string.Empty;
+    public string? RoleId { get; init; }
+    public string? RoleName { get; init; }
+
+    [JsonPropertyName("_links")]
+    public ModeusEventAttendeeLinks? Links { get; init; }
+}
+public class ModeusEventAttendeeLinks
+{
+    public ModeusHrefLink? Event { get; init; }
+    public ModeusHrefLink? Person { get; init; }
+}
+public record ModeusPerson(string Id, string? LastName, string? FirstName, string? MiddleName, string? FullName);
+public record ModeusBuilding(string? Id, string? Name, string? NameShort, string? Address);
+public record ModeusRoom(string Id, string Name, string? NameShort, ModeusBuilding? Building, int? TotalCapacity, int? WorkingCapacity);
+public record ModeusRoomsEmbedded(List<ModeusRoom>? Rooms);
+public record ModeusPage(int Size, int TotalElements, int TotalPages, int Number);
+public class ModeusRoomsResponse
+{
+    [JsonPropertyName("_embedded")]
+    public ModeusRoomsEmbedded? Embedded { get; init; }
+    public ModeusPage? Page { get; init; }
+    public List<ModeusRoom>? Rooms { get; init; }
+
+    [JsonIgnore]
+    public IReadOnlyList<ModeusRoom> RoomItems => Embedded?.Rooms ?? Rooms ?? [];
+}
 public record ModeusEmployee(string? Id, string FullName, string? Department);

backend/UniVerse.Application/Interfaces/IUserService.cs

@@ -1,4 +1,5 @@
 using UniVerse.Application.DTOs.Common;
+using UniVerse.Application.DTOs.Lectures;
 using UniVerse.Application.DTOs.Users;
 using UniVerse.Domain.Enums;
 
@@ -9,7 +10,8 @@ public interface IUserService
     Task<UserDto> GetByIdAsync(int id);
     Task<UserDto> UpdateProfileAsync(int id, UpdateUserRequest request);
     Task<UserStatsDto> GetStatsAsync(int id);
+    Task<PagedResult<LectureDto>> GetEnrollmentsAsync(int id, PaginationRequest pagination);
     Task<PagedResult<UserDto>> GetAllAsync(UserFilterRequest filter);
-    Task SetRoleAsync(int id, UserRole role);
+    Task SetRolesAsync(int id, IReadOnlyCollection<UserRole> roles);
     Task SetActiveAsync(int id, bool isActive);
 }

backend/UniVerse.Application/Mappings/MappingExtensions.cs

@@ -16,11 +16,16 @@ public static class MappingExtensions
     // --- User ---
     public static UserDto ToDto(this User user, int level) => new(
         user.Id, user.Email, user.DisplayName, user.AvatarUrl,
-        user.Role, user.IsActive, user.Xp, user.Coins, level, user.CreatedAt
+        user.Roles.Select(r => r.Role).OrderBy(r => r).ToList(), user.IsActive, user.Xp, user.Coins, level, user.CreatedAt
+    );
+
+    public static CurrentUserDto ToCurrentUserDto(this User user, int level) => new(
+        user.Id, user.Email, user.DisplayName, user.AvatarUrl,
+        user.Roles.Select(r => r.Role).OrderBy(r => r).ToList(), user.Xp, user.Coins, level, user.CreatedAt
     );
 
     public static UserAuthDto ToAuthDto(this User user) => new(
-        user.Id, user.Email, user.DisplayName, user.Role
+        user.Id, user.Email, user.DisplayName, user.Roles.Select(r => r.Role).OrderBy(r => r).ToList()
     );
 
     // --- Tag ---
@@ -46,14 +51,14 @@ public static class MappingExtensions
     );
 
     // --- Lecture ---
-    public static LectureDto ToDto(this Lecture lecture) => new(
+    public static LectureDto ToDto(this Lecture lecture, bool isEnrolled = false) => new(
         lecture.Id, lecture.CourseId, lecture.Course?.Name ?? "",
         lecture.TeacherId, lecture.Teacher?.DisplayName,
         lecture.LocationId, lecture.Location?.Name,
         lecture.Title, lecture.Description, lecture.Format,
         lecture.StartsAt, lecture.EndsAt, lecture.IsOpen,
         lecture.MaxEnrollments, lecture.Enrollments.Count,
-        lecture.OnlineUrl, lecture.CreatedAt
+        lecture.OnlineUrl, lecture.CreatedAt, isEnrolled
     );
 
     public static LectureDetailDto ToDetailDto(this Lecture lecture, bool isEnrolled) => new(
@@ -79,7 +84,7 @@ public static class MappingExtensions
         review.UserId, review.User?.DisplayName,
         review.Rating, review.Text, review.LlmStatus,
         review.Sentiment, review.QualityScore, review.IsInformative,
-        review.LlmTags, review.CreatedAt
+        review.LlmTags, review.LlmRawOutput, review.CreatedAt
     );
 
     // --- Achievement ---

backend/UniVerse.Application/Prompts/ReviewPromptTemplate.cs

@@ -0,0 +1,27 @@
+namespace UniVerse.Application.Prompts;
+
+public static class ReviewPromptTemplate
+{
+    public const string LectureContextPlaceholder = "{lectureContext}";
+    public const string ReviewTextPlaceholder = "{reviewText}";
+
+    public const string Default = """
+        Проанализируй отзыв студента о лекции. Верни объект JSON со следующими полями: 
+        - quality_score: число от 0 до 1, указывающее на качество отзыва;
+        - sentiment: «Положительный», «Нейтральный» или «Отрицательный»; 
+        - tags: массив соответствующих тематических тегов;
+        - is_informative: логическое значение, указывающее, является ли отзыв информативным.
+
+        Контекст лекции: {lectureContext}
+        Текст отзыва: {reviewText}
+        """;
+
+    public static bool HasRequiredPlaceholders(string prompt) =>
+        prompt.Contains(LectureContextPlaceholder, StringComparison.Ordinal) &&
+        prompt.Contains(ReviewTextPlaceholder, StringComparison.Ordinal);
+
+    public static string Render(string template, string reviewText, string lectureContext) =>
+        template
+            .Replace(LectureContextPlaceholder, lectureContext)
+            .Replace(ReviewTextPlaceholder, reviewText);
+}

backend/UniVerse.Application/UniVerse.Application.csproj

@@ -8,12 +8,12 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="12.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.0" />
+        <PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="12.1.1" />
+        <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.7" />
         <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.7.0" />
-        <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="8.7.0" />
-        <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.0" />
+        <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="8.18.0" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.7" />
     </ItemGroup>
 
     <ItemGroup>

backend/UniVerse.Domain/Entities/LevelThreshold.cs

@@ -0,0 +1,7 @@
+namespace UniVerse.Domain.Entities;
+
+public class LevelThreshold
+{
+    public int Level { get; set; }
+    public int RequiredXp { get; set; }
+}

backend/UniVerse.Domain/Entities/Review.cs

@@ -14,6 +14,7 @@ public class Review
     public double? QualityScore { get; set; }
     public bool? IsInformative { get; set; }
     public string[]? LlmTags { get; set; }
+    public string? LlmRawOutput { get; set; }
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
     public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
 

backend/UniVerse.Domain/Entities/ReviewPromptSetting.cs

@@ -0,0 +1,11 @@
+namespace UniVerse.Domain.Entities;
+
+public class ReviewPromptSetting
+{
+    public const int SingletonId = 1;
+
+    public int Id { get; set; } = SingletonId;
+    public string Prompt { get; set; } = string.Empty;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+}

backend/UniVerse.Domain/Entities/User.cs

@@ -8,7 +8,6 @@ public class User
     public string Email { get; set; } = string.Empty;
     public string? DisplayName { get; set; }
     public string? AvatarUrl { get; set; }
-    public UserRole Role { get; set; } = UserRole.Student;
     public bool IsActive { get; set; } = true;
     public string? MicrosoftId { get; set; }
     public int Xp { get; set; }
@@ -19,9 +18,11 @@ public class User
     // Navigation properties
     public StudentProfile? StudentProfile { get; set; }
     public TeacherProfile? TeacherProfile { get; set; }
+    public ICollection<UserRoleAssignment> Roles { get; set; } = new List<UserRoleAssignment>();
     public ICollection<LectureEnrollment> Enrollments { get; set; } = new List<LectureEnrollment>();
     public ICollection<Review> Reviews { get; set; } = new List<Review>();
     public ICollection<UserAchievement> UserAchievements { get; set; } = new List<UserAchievement>();
     public ICollection<CoinTransaction> CoinTransactions { get; set; } = new List<CoinTransaction>();
+    public ICollection<UserNotification> Notifications { get; set; } = new List<UserNotification>();
     public ICollection<RefreshToken> RefreshTokens { get; set; } = new List<RefreshToken>();
 }

backend/UniVerse.Domain/Entities/UserNotification.cs

@@ -0,0 +1,14 @@
+namespace UniVerse.Domain.Entities;
+
+public class UserNotification
+{
+    public int Id { get; set; }
+    public int UserId { get; set; }
+    public string Type { get; set; } = string.Empty;
+    public string Title { get; set; } = string.Empty;
+    public string Body { get; set; } = string.Empty;
+    public bool IsRead { get; set; }
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    public User User { get; set; } = null!;
+}

backend/UniVerse.Domain/Entities/UserRoleAssignment.cs

@@ -0,0 +1,11 @@
+using UniVerse.Domain.Enums;
+
+namespace UniVerse.Domain.Entities;
+
+public class UserRoleAssignment
+{
+    public int UserId { get; set; }
+    public UserRole Role { get; set; }
+
+    public User User { get; set; } = null!;
+}

backend/UniVerse.Domain/Exceptions/BadRequestException.cs

@@ -0,0 +1,8 @@
+namespace UniVerse.Domain.Exceptions;
+
+public class BadRequestException : Exception
+{
+    public BadRequestException(string message) : base(message)
+    {
+    }
+}

backend/UniVerse.Domain/Services/EnrollmentSlotPolicy.cs

@@ -0,0 +1,21 @@
+namespace UniVerse.Domain.Services;
+
+public static class EnrollmentSlotPolicy
+{
+    private static readonly IReadOnlyList<EnrollmentSlotRule> SlotRules =
+    [
+        new(1, 3),
+        new(3, 5),
+        new(4, 7)
+    ];
+
+    public static IReadOnlyList<EnrollmentSlotRule> Rules => SlotRules;
+
+    public static int GetLimitForLevel(int level) =>
+        SlotRules
+            .Where(rule => rule.Level <= level)
+            .OrderBy(rule => rule.Level)
+            .LastOrDefault()?.Slots ?? SlotRules[0].Slots;
+}
+
+public sealed record EnrollmentSlotRule(int Level, int Slots);

backend/UniVerse.Infrastructure/Data/AchievementCatalogSeeder.cs

@@ -0,0 +1,92 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using UniVerse.Domain.Entities;
+
+namespace UniVerse.Infrastructure.Data;
+
+public static class AchievementCatalogSeeder
+{
+    private static readonly IReadOnlyList<AchievementSeed> Catalog =
+    [
+        new(1001, "Добро пожаловать в UniVerse", "Совершить первое действие: записаться на лекцию, оставить отзыв или посетить занятие.", "sparkles", 10, "first_activity:1"),
+        new(1002, "Первый шаг", "Посетить первую открытую лекцию.", "book-2", 10, "lectures_attended:1"),
+        new(1003, "Вошел во вкус", "Посетить 3 открытые лекции.", "books", 20, "lectures_attended:3"),
+        new(1004, "Постоянный слушатель", "Посетить 5 открытых лекций.", "calendar-event", 35, "lectures_attended:5"),
+        new(1005, "Академический марафон", "Посетить 10 открытых лекций.", "stopwatch", 60, "lectures_attended:10"),
+        new(1006, "Грандмастер лекций", "Посетить 25 открытых лекций.", "trophy", 120, "lectures_attended:25"),
+        new(1007, "Первый отзыв", "Оставить первый отзыв о посещенной лекции.", "message-circle", 10, "reviews_written:1"),
+        new(1008, "Голос аудитории", "Оставить 3 отзыва о лекциях.", "thumb-up", 25, "reviews_written:3"),
+        new(1009, "Рецензент", "Оставить 10 отзывов о лекциях.", "clipboard-list", 70, "reviews_written:10"),
+        new(1010, "Голос перемен", "Оставить 25 отзывов о лекциях.", "chart-line", 150, "reviews_written:25"),
+        new(1011, "Смелый выбор", "Записаться на первую открытую лекцию.", "calendar", 5, "lectures_registered:1"),
+        new(1012, "План на неделю", "Иметь 3 активные записи на будущие лекции.", "calendar-event", 15, "active_registrations:3"),
+        new(1013, "Полный календарь", "Иметь 5 активных записей на будущие лекции.", "alarm", 30, "active_registrations:5"),
+        new(1014, "Серия интереса", "Посещать открытые лекции 3 недели подряд.", "star", 50, "attendance_streak_weeks:3"),
+        new(1015, "Учебный месяц", "Посещать открытые лекции 4 недели подряд.", "sparkles", 80, "attendance_streak_weeks:4"),
+        new(1016, "Без пропусков", "Посетить 5 лекций, на которые была оформлена запись.", "circle-check", 40, "attended_registered:5"),
+        new(1017, "Надежный участник", "Посетить 10 лекций, на которые была оформлена запись.", "shield", 75, "attended_registered:10"),
+        new(1018, "Капитал знаний", "Получить 500 монет за активность на платформе.", "coin", 80, "coins_earned:500"),
+        new(1019, "Новый уровень", "Достигнуть 2 уровня.", "star", 25, "level_reached:2"),
+        new(1020, "Уверенный рост", "Достигнуть 5 уровня.", "chart-bar", 100, "level_reached:5"),
+        new(1021, "Профиль заполнен", "Заполнить имя и аватар в профиле.", "user", 10, "profile_completed:1")
+    ];
+
+    private static readonly IReadOnlyDictionary<string, string> LegacyConditions = new Dictionary<string, string>
+    {
+        ["reviews_1"] = "reviews_written:1",
+        ["reviews_5"] = "reviews_written:5",
+        ["reviews_10"] = "reviews_written:10",
+        ["attended_5"] = "lectures_attended:5",
+        ["attended_10"] = "lectures_attended:10"
+    };
+
+    public static async Task SeedAsync(IServiceProvider services, CancellationToken cancellationToken = default)
+    {
+        using var scope = services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+        var legacyConditionKeys = LegacyConditions.Keys.ToArray();
+
+        var legacyAchievements = await db.Achievements
+            .Where(a => a.Condition != null && legacyConditionKeys.Contains(a.Condition))
+            .ToListAsync(cancellationToken);
+
+        foreach (var achievement in legacyAchievements)
+            achievement.Condition = LegacyConditions[achievement.Condition!];
+
+        foreach (var seed in Catalog)
+        {
+            var achievement = await db.Achievements.FindAsync([seed.Id], cancellationToken);
+            if (achievement == null)
+            {
+                db.Achievements.Add(new Achievement
+                {
+                    Id = seed.Id,
+                    Name = seed.Name,
+                    Description = seed.Description,
+                    IconUrl = seed.IconUrl,
+                    XpReward = 0,
+                    CoinReward = seed.CoinReward,
+                    Condition = seed.Condition
+                });
+                continue;
+            }
+
+            achievement.Name = seed.Name;
+            achievement.Description = seed.Description;
+            achievement.IconUrl = seed.IconUrl;
+            achievement.XpReward = 0;
+            achievement.CoinReward = seed.CoinReward;
+            achievement.Condition = seed.Condition;
+        }
+
+        await db.SaveChangesAsync(cancellationToken);
+    }
+
+    private sealed record AchievementSeed(
+        int Id,
+        string Name,
+        string Description,
+        string IconUrl,
+        int CoinReward,
+        string Condition);
+}

backend/UniVerse.Infrastructure/Data/AppDbContext.cs

@@ -10,6 +10,7 @@ public class AppDbContext : DbContext
     public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
 
     public DbSet<User> Users { get; set; } = null!;
+    public DbSet<UserRoleAssignment> UserRoles { get; set; } = null!;
     public DbSet<StudentProfile> StudentProfiles { get; set; } = null!;
     public DbSet<TeacherProfile> TeacherProfiles { get; set; } = null!;
     public DbSet<Course> Courses { get; set; } = null!;
@@ -19,9 +20,12 @@ public class AppDbContext : DbContext
     public DbSet<CourseTag> CourseTags { get; set; } = null!;
     public DbSet<LectureEnrollment> LectureEnrollments { get; set; } = null!;
     public DbSet<Review> Reviews { get; set; } = null!;
+    public DbSet<ReviewPromptSetting> ReviewPromptSettings { get; set; } = null!;
     public DbSet<Achievement> Achievements { get; set; } = null!;
     public DbSet<UserAchievement> UserAchievements { get; set; } = null!;
     public DbSet<CoinTransaction> CoinTransactions { get; set; } = null!;
+    public DbSet<LevelThreshold> LevelThresholds { get; set; } = null!;
+    public DbSet<UserNotification> UserNotifications { get; set; } = null!;
     public DbSet<RefreshToken> RefreshTokens { get; set; } = null!;
 
     static AppDbContext()

backend/UniVerse.Infrastructure/Data/Configurations/LevelThresholdConfiguration.cs

@@ -0,0 +1,33 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using UniVerse.Domain.Entities;
+
+namespace UniVerse.Infrastructure.Data.Configurations;
+
+public class LevelThresholdConfiguration : IEntityTypeConfiguration<LevelThreshold>
+{
+    public void Configure(EntityTypeBuilder<LevelThreshold> builder)
+    {
+        builder.ToTable("level_thresholds", table =>
+        {
+            table.HasCheckConstraint("CK_level_thresholds_level_positive", "level > 0");
+            table.HasCheckConstraint("CK_level_thresholds_required_xp_non_negative", "required_xp >= 0");
+        });
+
+        builder.HasKey(t => t.Level);
+        builder.Property(t => t.Level).HasColumnName("level").ValueGeneratedNever();
+        builder.Property(t => t.RequiredXp).HasColumnName("required_xp").IsRequired();
+        builder.HasIndex(t => t.RequiredXp).IsUnique();
+
+        builder.HasData(
+            new LevelThreshold { Level = 1, RequiredXp = 0 },
+            new LevelThreshold { Level = 2, RequiredXp = 100 },
+            new LevelThreshold { Level = 3, RequiredXp = 300 },
+            new LevelThreshold { Level = 4, RequiredXp = 600 },
+            new LevelThreshold { Level = 5, RequiredXp = 1000 },
+            new LevelThreshold { Level = 6, RequiredXp = 1500 },
+            new LevelThreshold { Level = 7, RequiredXp = 2500 },
+            new LevelThreshold { Level = 8, RequiredXp = 4000 }
+        );
+    }
+}

backend/UniVerse.Infrastructure/Data/Configurations/ReviewConfiguration.cs

@@ -21,6 +21,7 @@ public class ReviewConfiguration : IEntityTypeConfiguration<Review>
         builder.Property(r => r.QualityScore).HasColumnName("quality_score");
         builder.Property(r => r.IsInformative).HasColumnName("is_informative");
         builder.Property(r => r.LlmTags).HasColumnName("llm_tags");
+        builder.Property(r => r.LlmRawOutput).HasColumnName("llm_raw_output");
         builder.Property(r => r.CreatedAt).HasColumnName("created_at").HasDefaultValueSql("NOW()");
         builder.Property(r => r.UpdatedAt).HasColumnName("updated_at").HasDefaultValueSql("NOW()");
 

backend/UniVerse.Infrastructure/Data/Configurations/ReviewPromptSettingConfiguration.cs

@@ -0,0 +1,27 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using UniVerse.Domain.Entities;
+
+namespace UniVerse.Infrastructure.Data.Configurations;
+
+public class ReviewPromptSettingConfiguration : IEntityTypeConfiguration<ReviewPromptSetting>
+{
+    public void Configure(EntityTypeBuilder<ReviewPromptSetting> builder)
+    {
+        builder.ToTable("review_prompt_settings");
+
+        builder.HasKey(setting => setting.Id);
+        builder.Property(setting => setting.Id)
+            .HasColumnName("id")
+            .ValueGeneratedNever();
+        builder.Property(setting => setting.Prompt)
+            .HasColumnName("prompt")
+            .IsRequired();
+        builder.Property(setting => setting.CreatedAt)
+            .HasColumnName("created_at")
+            .HasDefaultValueSql("NOW()");
+        builder.Property(setting => setting.UpdatedAt)
+            .HasColumnName("updated_at")
+            .HasDefaultValueSql("NOW()");
+    }
+}

backend/UniVerse.Infrastructure/Data/Configurations/TeacherProfileConfiguration.cs

@@ -24,5 +24,6 @@ public class TeacherProfileConfiguration : IEntityTypeConfiguration<TeacherProfi
             .OnDelete(DeleteBehavior.Cascade);
 
         builder.HasIndex(t => t.UserId).IsUnique();
+        builder.HasIndex(t => t.ModeusId).IsUnique().HasFilter("modeus_id IS NOT NULL");
     }
 }

backend/UniVerse.Infrastructure/Data/Configurations/UserConfiguration.cs

@@ -15,7 +15,6 @@ public class UserConfiguration : IEntityTypeConfiguration<User>
         builder.Property(u => u.Email).HasColumnName("email").HasMaxLength(255).IsRequired();
         builder.Property(u => u.DisplayName).HasColumnName("display_name").HasMaxLength(255);
         builder.Property(u => u.AvatarUrl).HasColumnName("avatar_url").HasMaxLength(500);
-        builder.Property(u => u.Role).HasColumnName("role");
         builder.Property(u => u.IsActive).HasColumnName("is_active").HasDefaultValue(true);
         builder.Property(u => u.MicrosoftId).HasColumnName("microsoft_id").HasMaxLength(255);
         builder.Property(u => u.Xp).HasColumnName("xp").HasDefaultValue(0);
@@ -25,5 +24,10 @@ public class UserConfiguration : IEntityTypeConfiguration<User>
 
         builder.HasIndex(u => u.Email).IsUnique();
         builder.HasIndex(u => u.MicrosoftId).IsUnique().HasFilter("microsoft_id IS NOT NULL");
+
+        builder.HasMany(u => u.Roles)
+            .WithOne(ur => ur.User)
+            .HasForeignKey(ur => ur.UserId)
+            .OnDelete(DeleteBehavior.Cascade);
     }
 }

backend/UniVerse.Infrastructure/Data/Configurations/UserNotificationConfiguration.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using UniVerse.Domain.Entities;
+
+namespace UniVerse.Infrastructure.Data.Configurations;
+
+public class UserNotificationConfiguration : IEntityTypeConfiguration<UserNotification>
+{
+    public void Configure(EntityTypeBuilder<UserNotification> builder)
+    {
+        builder.ToTable("user_notifications");
+
+        builder.HasKey(n => n.Id);
+        builder.Property(n => n.Id).HasColumnName("id");
+        builder.Property(n => n.UserId).HasColumnName("user_id");
+        builder.Property(n => n.Type).HasColumnName("type").HasMaxLength(50).IsRequired();
+        builder.Property(n => n.Title).HasColumnName("title").HasMaxLength(255).IsRequired();
+        builder.Property(n => n.Body).HasColumnName("body").HasMaxLength(1000).IsRequired();
+        builder.Property(n => n.IsRead).HasColumnName("is_read").HasDefaultValue(false);
+        builder.Property(n => n.CreatedAt).HasColumnName("created_at").HasDefaultValueSql("NOW()");
+
+        builder.HasOne(n => n.User)
+            .WithMany(u => u.Notifications)
+            .HasForeignKey(n => n.UserId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasIndex(n => new { n.UserId, n.CreatedAt });
+    }
+}

backend/UniVerse.Infrastructure/Data/Configurations/UserRoleAssignmentConfiguration.cs

@@ -0,0 +1,17 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using UniVerse.Domain.Entities;
+
+namespace UniVerse.Infrastructure.Data.Configurations;
+
+public class UserRoleAssignmentConfiguration : IEntityTypeConfiguration<UserRoleAssignment>
+{
+    public void Configure(EntityTypeBuilder<UserRoleAssignment> builder)
+    {
+        builder.ToTable("user_roles");
+
+        builder.HasKey(ur => new { ur.UserId, ur.Role });
+        builder.Property(ur => ur.UserId).HasColumnName("user_id");
+        builder.Property(ur => ur.Role).HasColumnName("role");
+    }
+}

backend/UniVerse.Infrastructure/ExternalServices/LlmClient.cs

@@ -1,9 +1,10 @@
 using System.Net.Http.Json;
-using System.Text;
 using System.Text.Json;
+using System.Text.Json.Serialization;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
 using UniVerse.Application.Interfaces;
+using UniVerse.Application.Prompts;
 
 namespace UniVerse.Infrastructure.ExternalServices;
 
@@ -11,25 +12,25 @@ public class LlmClient : ILlmClient
 {
     private readonly HttpClient _http;
     private readonly IConfiguration _config;
+    private readonly IReviewPromptService _reviewPrompts;
     private readonly ILogger<LlmClient> _logger;
 
-    public LlmClient(HttpClient http, IConfiguration config, ILogger<LlmClient> logger)
+    public LlmClient(
+        HttpClient http,
+        IConfiguration config,
+        IReviewPromptService reviewPrompts,
+        ILogger<LlmClient> logger)
     {
-        _http = http; _config = config; _logger = logger;
+        _http = http;
+        _config = config;
+        _reviewPrompts = reviewPrompts;
+        _logger = logger;
     }
 
     public async Task<LlmReviewAnalysis> AnalyzeReviewAsync(string reviewText, string lectureContext)
     {
-        var prompt = $"""
-            Analyze the following student review of a lecture. Return a JSON object with:
-            - quality_score: float 0-1 indicating review quality
-            - sentiment: "Positive", "Neutral", or "Negative"
-            - tags: array of relevant topic tags
-            - is_informative: boolean indicating if the review is informative
-
-            Lecture context: {lectureContext}
-            Review text: {reviewText}
-            """;
+        var promptSetting = await _reviewPrompts.GetAsync();
+        var prompt = ReviewPromptTemplate.Render(promptSetting.Prompt, reviewText, lectureContext);
 
         var request = new
         {
@@ -49,11 +50,37 @@ public class LlmClient : ILlmClient
 
         var json = await response.Content.ReadFromJsonAsync<JsonElement>();
         var content = json.GetProperty("choices")[0].GetProperty("message").GetProperty("content").GetString()!;
-        var analysis = JsonSerializer.Deserialize<LlmRawResponse>(content,
+        var analysisJson = NormalizeJsonContent(content);
+        var analysis = JsonSerializer.Deserialize<LlmRawResponse>(analysisJson,
             new JsonSerializerOptions { PropertyNameCaseInsensitive = true })!;
 
-        return new LlmReviewAnalysis(analysis.QualityScore, analysis.Sentiment, analysis.Tags, analysis.IsInformative);
+        return new LlmReviewAnalysis(
+            Math.Clamp(analysis.QualityScore, 0, 1),
+            analysis.Sentiment ?? "",
+            analysis.Tags ?? [],
+            analysis.IsInformative,
+            content);
     }
 
-    private record LlmRawResponse(double QualityScore, string Sentiment, string[] Tags, bool IsInformative);
+    private static string NormalizeJsonContent(string content)
+    {
+        var trimmed = content.Trim();
+        if (!trimmed.StartsWith("```", StringComparison.Ordinal))
+            return trimmed;
+
+        var firstNewLine = trimmed.IndexOf('\n');
+        if (firstNewLine < 0)
+            return trimmed;
+
+        var lastFence = trimmed.LastIndexOf("```", StringComparison.Ordinal);
+        return lastFence > firstNewLine
+            ? trimmed[(firstNewLine + 1)..lastFence].Trim()
+            : trimmed[(firstNewLine + 1)..].Trim();
+    }
+
+    private record LlmRawResponse(
+        [property: JsonPropertyName("quality_score")] double QualityScore,
+        string? Sentiment,
+        string[]? Tags,
+        [property: JsonPropertyName("is_informative")] bool IsInformative);
 }

backend/UniVerse.Infrastructure/ExternalServices/MicrosoftAuthClient.cs

@@ -0,0 +1,52 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Identity.Client;
+using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Exceptions;
+
+namespace UniVerse.Infrastructure.ExternalServices;
+
+public class MicrosoftAuthClient : IMicrosoftAuthClient
+{
+    private readonly IConfiguration _config;
+
+    public MicrosoftAuthClient(IConfiguration config)
+    {
+        _config = config;
+    }
+
+    public async Task<MicrosoftTokenResult> ExchangeAuthorizationCodeAsync(
+        string authorizationCode,
+        string redirectUri,
+        CancellationToken cancellationToken = default)
+    {
+        var tenantId = _config["AzureAd:TenantId"];
+        var clientId = _config["AzureAd:ClientId"];
+        var clientSecret = _config["AzureAd:ClientSecret"];
+        var instance = _config["AzureAd:Instance"] ?? "https://login.microsoftonline.com/";
+
+        if (string.IsNullOrWhiteSpace(tenantId)
+            || string.IsNullOrWhiteSpace(clientId)
+            || string.IsNullOrWhiteSpace(clientSecret))
+            throw new UnauthorizedException("Аутентификация Microsoft не настроена (AzureAd:TenantId/ClientId/ClientSecret).");
+
+        var authority = $"{instance.TrimEnd('/')}/{tenantId}";
+
+        var app = ConfidentialClientApplicationBuilder.Create(clientId)
+            .WithClientSecret(clientSecret)
+            .WithAuthority(new Uri(authority))
+            .WithRedirectUri(redirectUri)
+            .Build();
+
+        try
+        {
+            var result = await app.AcquireTokenByAuthorizationCode(["User.Read"], authorizationCode)
+                .ExecuteAsync(cancellationToken);
+
+            return new MicrosoftTokenResult(result.IdToken);
+        }
+        catch (MsalException ex)
+        {
+            throw new UnauthorizedException($"Ошибка аутентификации Microsoft: {ex.Message}");
+        }
+    }
+}

backend/UniVerse.Infrastructure/ExternalServices/ModeusApiClient.cs

@@ -1,4 +1,7 @@
 using System.Net.Http.Json;
+using System.Net;
+using System.Net.Http.Headers;
+using System.Text.Json;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
 using UniVerse.Application.DTOs.Sync;
@@ -21,18 +24,119 @@ public class ModeusApiClient : IModeusApiClient
 
     public async Task<ModeusEventsResponse> SearchEventsAsync(SyncScheduleRequest request)
     {
-        var body = new { specialtyCode = request.SpecialtyCode, timeMin = request.TimeMin, timeMax = request.TimeMax, typeId = request.TypeId };
+        var pageSize = request.Size is > 0 ? request.Size.Value : 900;
+        var body = new Dictionary<string, object?>
+        {
+            ["size"] = pageSize,
+            ["timeMin"] = request.TimeMin,
+            ["timeMax"] = request.TimeMax
+        };
+
+        AddNonEmpty(body, "roomId", request.RoomId);
+        AddNonEmpty(body, "attendeePersonId", request.AttendeePersonId);
+        AddNonEmpty(body, "courseUnitRealizationId", request.CourseUnitRealizationId);
+        AddNonEmpty(body, "cycleRealizationId", request.CycleRealizationId);
+        AddNonEmpty(body, "specialtyCode", request.SpecialtyCode);
+        AddNonEmpty(body, "learningStartYear", request.LearningStartYear);
+        AddNonEmpty(body, "profileName", request.ProfileName);
+        AddNonEmpty(body, "curriculumId", request.CurriculumId);
+        AddNonEmpty(body, "typeId", request.TypeId);
+
         var response = await _http.PostAsJsonAsync("/api/proxy/events/search", body);
-        response.EnsureSuccessStatusCode();
-        return await response.Content.ReadFromJsonAsync<ModeusEventsResponse>() ?? new(new());
+        var requestJson = JsonSerializer.Serialize(body);
+        await EnsureSuccessAsync(response, "Modeus events search",
+            BuildEventsRequestSummary(requestJson));
+        return await ReadJsonAsync<ModeusEventsResponse>(response, "Modeus events search",
+            BuildEventsRequestSummary(requestJson))
+            ?? new ModeusEventsResponse();
     }
 
     public async Task<ModeusRoomsResponse> SearchRoomsAsync()
     {
-        var response = await _http.PostAsJsonAsync("/api/proxy/rooms/search", new { });
-        response.EnsureSuccessStatusCode();
-        return await response.Content.ReadFromJsonAsync<ModeusRoomsResponse>() ?? new(new());
+        const int pageSize = 100;
+        var allRooms = new List<ModeusRoom>();
+        var page = 0;
+        var totalPages = 1;
+
+        do
+        {
+            var body = new
+            {
+                name = "",
+                sort = "+building.name,+name",
+                size = pageSize,
+                page,
+                deleted = false
+            };
+
+            var response = await _http.PostAsJsonAsync("/api/proxy/rooms/search", body);
+            await EnsureSuccessAsync(response, "Modeus rooms search",
+                $"name=<empty>, sort=+building.name,+name, size={pageSize}, page={page}, deleted=false");
+
+            var payload = await ReadJsonAsync<ModeusRoomsResponse>(response, "Modeus rooms search",
+                $"name=<empty>, sort=+building.name,+name, size={pageSize}, page={page}, deleted=false")
+                ?? new ModeusRoomsResponse();
+            allRooms.AddRange(payload.RoomItems);
+
+            totalPages = payload.Page?.TotalPages ?? page + 1;
+            page++;
         }
+        while (page < totalPages);
+
+        return new ModeusRoomsResponse { Rooms = allRooms };
+    }
+
+    private static async Task EnsureSuccessAsync(HttpResponseMessage response, string operation, string requestSummary)
+    {
+        if (response.IsSuccessStatusCode) return;
+
+        var responseBody = await response.Content.ReadAsStringAsync();
+
+        throw new HttpRequestException(
+            $"{operation} failed with HTTP {(int)response.StatusCode} {response.ReasonPhrase}. Request: {requestSummary}. Response body: {Truncate(responseBody)}",
+            null,
+            response.StatusCode);
+    }
+
+    private static string BuildEventsRequestSummary(string requestJson) => $"Request JSON: {requestJson}";
+
+    private static void AddNonEmpty<T>(
+        IDictionary<string, object?> body,
+        string key,
+        IReadOnlyList<T>? values)
+    {
+        if (values is { Count: > 0 })
+            body[key] = values;
+    }
+
+    private static async Task<T?> ReadJsonAsync<T>(HttpResponseMessage response, string operation, string requestSummary)
+    {
+        var responseBody = await response.Content.ReadAsStringAsync();
+        var contentType = response.Content.Headers.ContentType?.ToString() ?? "<empty>";
+        var contentLength = response.Content.Headers.ContentLength?.ToString() ?? "<unknown>";
+
+        if (string.IsNullOrWhiteSpace(responseBody))
+        {
+            throw new HttpRequestException(
+                $"{operation} returned HTTP {(int)response.StatusCode} {response.ReasonPhrase} with an empty response body. Request: {requestSummary}. Content-Type: {contentType}. Content-Length: {contentLength}.",
+                null,
+                response.StatusCode);
+        }
+
+        try
+        {
+            return JsonSerializer.Deserialize<T>(responseBody, new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
+        }
+        catch (JsonException ex)
+        {
+            throw new InvalidOperationException(
+                $"{operation} returned invalid JSON. Request: {requestSummary}. Content-Type: {contentType}. Response body: {Truncate(responseBody)}",
+                ex);
+        }
+    }
+
+    private static string Truncate(string value) =>
+        value.Length > 2000 ? string.Concat(value.AsSpan(0, 2000), "...<truncated>") : value;
 
     public async Task<List<ModeusEmployee>> SearchEmployeeAsync(string fullname)
     {
@@ -40,4 +144,20 @@ public class ModeusApiClient : IModeusApiClient
             $"/api/schedule/searchemployee?fullname={Uri.EscapeDataString(fullname)}");
         return response ?? new();
     }
+
+    public async Task<string?> GetSubIdByFullNameAsync(string fullname, CancellationToken cancellationToken = default)
+    {
+        using var request = new HttpRequestMessage(
+            HttpMethod.Get,
+            $"/api/universe/subid?fullname={Uri.EscapeDataString(fullname)}");
+        request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("text/plain"));
+
+        using var response = await _http.SendAsync(request, cancellationToken);
+        if (response.StatusCode == HttpStatusCode.NotFound)
+            return null;
+
+        await EnsureSuccessAsync(response, "Universe user sub lookup", $"fullname={fullname}");
+        var body = await response.Content.ReadAsStringAsync(cancellationToken);
+        return string.IsNullOrWhiteSpace(body) ? null : body.Trim();
+    }
 }

backend/UniVerse.Infrastructure/Migrations/20260506134139_Initial.Designer.cs

@@ -9,10 +9,10 @@ using UniVerse.Infrastructure.Data;
 
 #nullable disable
 
-namespace UniVerse.Infrastructure.Data.Migrations
+namespace UniVerse.Infrastructure.Migrations
 {
     [DbContext(typeof(AppDbContext))]
-    [Migration("20260428124938_Initial")]
+    [Migration("20260506134139_Initial")]
     partial class Initial
     {
         /// <inheritdoc />

backend/UniVerse.Infrastructure/Migrations/20260506134139_Initial.cs

@@ -4,7 +4,7 @@ using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
-namespace UniVerse.Infrastructure.Data.Migrations
+namespace UniVerse.Infrastructure.Migrations
 {
     /// <inheritdoc />
     public partial class Initial : Migration

backend/UniVerse.Infrastructure/Migrations/20260511011508_UserRolesJoinTable.Designer.cs

@@ -0,0 +1,979 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using UniVerse.Infrastructure.Data;
+
+#nullable disable
+
+namespace UniVerse.Infrastructure.Migrations
+{
+    [DbContext(typeof(AppDbContext))]
+    [Migration("20260511011508_UserRolesJoinTable")]
+    partial class UserRolesJoinTable
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.HasPostgresEnum(modelBuilder, "coin_transaction_type", "coin_transaction_type", new[] { "review_reward", "achievement_reward", "attendance_reward", "admin_adjustment" });
+            NpgsqlModelBuilderExtensions.HasPostgresEnum(modelBuilder, "review_llm_status", "review_llm_status", new[] { "pending", "analyzed", "rejected" });
+            NpgsqlModelBuilderExtensions.HasPostgresEnum(modelBuilder, "review_sentiment", "review_sentiment", new[] { "positive", "neutral", "negative" });
+            NpgsqlModelBuilderExtensions.HasPostgresEnum(modelBuilder, "tag_type", "tag_type", new[] { "institute", "faculty", "subject", "organization", "topic", "other" });
+            NpgsqlModelBuilderExtensions.HasPostgresEnum(modelBuilder, "user_role", "user_role", new[] { "student", "teacher", "admin" });
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Achievement", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CoinReward")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0)
+                        .HasColumnName("coin_reward");
+
+                    b.Property<string>("Condition")
+                        .HasColumnType("text")
+                        .HasColumnName("condition");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text")
+                        .HasColumnName("description");
+
+                    b.Property<string>("IconUrl")
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("icon_url");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("name");
+
+                    b.Property<int>("XpReward")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0)
+                        .HasColumnName("xp_reward");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("achievements", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.CoinTransaction", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int?>("AchievementId")
+                        .HasColumnType("integer")
+                        .HasColumnName("achievement_id");
+
+                    b.Property<int>("Amount")
+                        .HasColumnType("integer")
+                        .HasColumnName("amount");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("description");
+
+                    b.Property<int?>("ReviewId")
+                        .HasColumnType("integer")
+                        .HasColumnName("review_id");
+
+                    b.Property<int>("Type")
+                        .HasColumnType("integer")
+                        .HasColumnName("type");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AchievementId");
+
+                    b.HasIndex("ReviewId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("coin_transactions", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Course", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text")
+                        .HasColumnName("description");
+
+                    b.Property<string>("ExternalId")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("external_id");
+
+                    b.Property<bool>("IsSynced")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("is_synced");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("name");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ExternalId")
+                        .IsUnique()
+                        .HasFilter("external_id IS NOT NULL");
+
+                    b.ToTable("courses", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.CourseTag", b =>
+                {
+                    b.Property<int>("CourseId")
+                        .HasColumnType("integer")
+                        .HasColumnName("course_id");
+
+                    b.Property<int>("TagId")
+                        .HasColumnType("integer")
+                        .HasColumnName("tag_id");
+
+                    b.Property<int>("Id")
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    b.HasKey("CourseId", "TagId");
+
+                    b.HasIndex("TagId");
+
+                    b.HasIndex("CourseId", "TagId")
+                        .IsUnique();
+
+                    b.ToTable("course_tags", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Lecture", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CourseId")
+                        .HasColumnType("integer")
+                        .HasColumnName("course_id");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text")
+                        .HasColumnName("description");
+
+                    b.Property<DateTime>("EndsAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("ends_at");
+
+                    b.Property<string>("ExternalId")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("external_id");
+
+                    b.Property<int>("Format")
+                        .HasColumnType("integer")
+                        .HasColumnName("format");
+
+                    b.Property<bool>("IsOpen")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(true)
+                        .HasColumnName("is_open");
+
+                    b.Property<int?>("LocationId")
+                        .HasColumnType("integer")
+                        .HasColumnName("location_id");
+
+                    b.Property<int>("MaxEnrollments")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0)
+                        .HasColumnName("max_enrollments");
+
+                    b.Property<string>("OnlineUrl")
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("online_url");
+
+                    b.Property<DateTime>("StartsAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("starts_at");
+
+                    b.Property<int?>("TeacherId")
+                        .HasColumnType("integer")
+                        .HasColumnName("teacher_id");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("title");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CourseId");
+
+                    b.HasIndex("ExternalId")
+                        .IsUnique()
+                        .HasFilter("external_id IS NOT NULL");
+
+                    b.HasIndex("LocationId");
+
+                    b.HasIndex("StartsAt");
+
+                    b.HasIndex("TeacherId");
+
+                    b.ToTable("lectures", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.LectureEnrollment", b =>
+                {
+                    b.Property<int>("LectureId")
+                        .HasColumnType("integer")
+                        .HasColumnName("lecture_id");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.Property<bool>("Attended")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("attended");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<int>("Id")
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    b.HasKey("LectureId", "UserId");
+
+                    b.HasIndex("UserId");
+
+                    b.HasIndex("LectureId", "UserId")
+                        .IsUnique();
+
+                    b.ToTable("lecture_enrollments", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Location", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Address")
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("address");
+
+                    b.Property<string>("Building")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("building");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<string>("ExternalId")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("external_id");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("name");
+
+                    b.Property<string>("Room")
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("room");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ExternalId")
+                        .IsUnique()
+                        .HasFilter("external_id IS NOT NULL");
+
+                    b.ToTable("locations", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.RefreshToken", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("expires_at");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("revoked_at");
+
+                    b.Property<string>("Token")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("token");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Token")
+                        .IsUnique();
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("refresh_tokens", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Review", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<bool?>("IsInformative")
+                        .HasColumnType("boolean")
+                        .HasColumnName("is_informative");
+
+                    b.Property<int>("LectureId")
+                        .HasColumnType("integer")
+                        .HasColumnName("lecture_id");
+
+                    b.Property<int>("LlmStatus")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0)
+                        .HasColumnName("llm_status");
+
+                    b.PrimitiveCollection<string[]>("LlmTags")
+                        .HasColumnType("text[]")
+                        .HasColumnName("llm_tags");
+
+                    b.Property<double?>("QualityScore")
+                        .HasColumnType("double precision")
+                        .HasColumnName("quality_score");
+
+                    b.Property<int>("Rating")
+                        .HasColumnType("integer")
+                        .HasColumnName("rating");
+
+                    b.Property<int?>("Sentiment")
+                        .HasColumnType("integer")
+                        .HasColumnName("sentiment");
+
+                    b.Property<string>("Text")
+                        .HasColumnType("text")
+                        .HasColumnName("text");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("LlmStatus");
+
+                    b.HasIndex("UserId");
+
+                    b.HasIndex("LectureId", "UserId")
+                        .IsUnique();
+
+                    b.ToTable("reviews", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.StudentProfile", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int?>("EnrollmentYear")
+                        .HasColumnType("integer")
+                        .HasColumnName("enrollment_year");
+
+                    b.Property<string>("Faculty")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("faculty");
+
+                    b.Property<string>("GroupName")
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("group_name");
+
+                    b.Property<string>("Specialty")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("specialty");
+
+                    b.Property<string>("StudentId")
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)")
+                        .HasColumnName("student_id");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId")
+                        .IsUnique();
+
+                    b.ToTable("student_profiles", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Tag", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("name");
+
+                    b.Property<int?>("ParentId")
+                        .HasColumnType("integer")
+                        .HasColumnName("parent_id");
+
+                    b.Property<int>("Type")
+                        .HasColumnType("integer")
+                        .HasColumnName("type");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ParentId");
+
+                    b.ToTable("tags", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.TeacherProfile", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Bio")
+                        .HasColumnType("text")
+                        .HasColumnName("bio");
+
+                    b.Property<string>("Department")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("department");
+
+                    b.Property<string>("ModeusId")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("modeus_id");
+
+                    b.Property<string>("Title")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("title");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId")
+                        .IsUnique();
+
+                    b.ToTable("teacher_profiles", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("AvatarUrl")
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("avatar_url");
+
+                    b.Property<int>("Coins")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0)
+                        .HasColumnName("coins");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<string>("DisplayName")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("display_name");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("email");
+
+                    b.Property<bool>("IsActive")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(true)
+                        .HasColumnName("is_active");
+
+                    b.Property<string>("MicrosoftId")
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("microsoft_id");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<int>("Xp")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0)
+                        .HasColumnName("xp");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Email")
+                        .IsUnique();
+
+                    b.HasIndex("MicrosoftId")
+                        .IsUnique()
+                        .HasFilter("microsoft_id IS NOT NULL");
+
+                    b.ToTable("users", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.UserAchievement", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.Property<int>("AchievementId")
+                        .HasColumnType("integer")
+                        .HasColumnName("achievement_id");
+
+                    b.Property<DateTime>("AwardedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("awarded_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<int>("Id")
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    b.HasKey("UserId", "AchievementId");
+
+                    b.HasIndex("AchievementId");
+
+                    b.HasIndex("UserId", "AchievementId")
+                        .IsUnique();
+
+                    b.ToTable("user_achievements", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.UserRoleAssignment", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("integer")
+                        .HasColumnName("role");
+
+                    b.HasKey("UserId", "Role");
+
+                    b.ToTable("user_roles", (string)null);
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.CoinTransaction", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.Achievement", "Achievement")
+                        .WithMany()
+                        .HasForeignKey("AchievementId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.HasOne("UniVerse.Domain.Entities.Review", "Review")
+                        .WithMany("CoinTransactions")
+                        .HasForeignKey("ReviewId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithMany("CoinTransactions")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Achievement");
+
+                    b.Navigation("Review");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.CourseTag", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.Course", "Course")
+                        .WithMany("CourseTags")
+                        .HasForeignKey("CourseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("UniVerse.Domain.Entities.Tag", "Tag")
+                        .WithMany("CourseTags")
+                        .HasForeignKey("TagId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Course");
+
+                    b.Navigation("Tag");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Lecture", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.Course", "Course")
+                        .WithMany("Lectures")
+                        .HasForeignKey("CourseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("UniVerse.Domain.Entities.Location", "Location")
+                        .WithMany("Lectures")
+                        .HasForeignKey("LocationId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.HasOne("UniVerse.Domain.Entities.User", "Teacher")
+                        .WithMany()
+                        .HasForeignKey("TeacherId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.Navigation("Course");
+
+                    b.Navigation("Location");
+
+                    b.Navigation("Teacher");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.LectureEnrollment", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.Lecture", "Lecture")
+                        .WithMany("Enrollments")
+                        .HasForeignKey("LectureId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithMany("Enrollments")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Lecture");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.RefreshToken", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithMany("RefreshTokens")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Review", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.Lecture", "Lecture")
+                        .WithMany("Reviews")
+                        .HasForeignKey("LectureId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithMany("Reviews")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Lecture");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.StudentProfile", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithOne("StudentProfile")
+                        .HasForeignKey("UniVerse.Domain.Entities.StudentProfile", "UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Tag", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.Tag", "Parent")
+                        .WithMany("Children")
+                        .HasForeignKey("ParentId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.Navigation("Parent");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.TeacherProfile", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithOne("TeacherProfile")
+                        .HasForeignKey("UniVerse.Domain.Entities.TeacherProfile", "UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.UserAchievement", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.Achievement", "Achievement")
+                        .WithMany("UserAchievements")
+                        .HasForeignKey("AchievementId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithMany("UserAchievements")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Achievement");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.UserRoleAssignment", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithMany("Roles")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Achievement", b =>
+                {
+                    b.Navigation("UserAchievements");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Course", b =>
+                {
+                    b.Navigation("CourseTags");
+
+                    b.Navigation("Lectures");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Lecture", b =>
+                {
+                    b.Navigation("Enrollments");
+
+                    b.Navigation("Reviews");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Location", b =>
+                {
+                    b.Navigation("Lectures");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Review", b =>
+                {
+                    b.Navigation("CoinTransactions");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.Tag", b =>
+                {
+                    b.Navigation("Children");
+
+                    b.Navigation("CourseTags");
+                });
+
+            modelBuilder.Entity("UniVerse.Domain.Entities.User", b =>
+                {
+                    b.Navigation("CoinTransactions");
+
+                    b.Navigation("Enrollments");
+
+                    b.Navigation("RefreshTokens");
+
+                    b.Navigation("Reviews");
+
+                    b.Navigation("Roles");
+
+                    b.Navigation("StudentProfile");
+
+                    b.Navigation("TeacherProfile");
+
+                    b.Navigation("UserAchievements");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}