Add course tree, lesson actions, and module description schema

- CourseTree: expandable module/lesson overview with Eye/Video icons
- SortableLessons: Kinescope ID in create form, published toggle, move-to-module dropdown
- Actions: toggleLessonPublished, moveLessonToModule, updateModule with description
- Schema: add description field to Module model + migration

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ROADMAP.md

@@ -6,13 +6,12 @@
 ---
 
 ## Этап 0 — Каркас, auth, роли ✅ ЗАВЕРШЁН (07.04.2026)
-**Задеплоено на:** https://school.second-brain.ru
 
 - [x] Next.js 16.2.2 (App Router, TypeScript, Tailwind v4)
 - [x] Docker Compose: PostgreSQL 16 (прод на Hetzner)
 - [x] Prisma 7: схема User, Session, Account + полная LMS-модель
 - [x] Better Auth: вход по email/password, роли student/curator/admin
-- [x] proxy.ts: защита маршрутов по сессии
+- [x] Middleware: защита маршрутов по сессии
 - [x] Дашборды для трёх ролей
 - [x] Страница входа, регистрации, подтверждения email
 - [x] Seed: admin/curator/student (пароль: Password123!)
@@ -21,62 +20,249 @@
 
 ---
 
-## Этап 1 — Курсы → Модули → Уроки (CRUD в админке)
-**Цель:** могу создать полную структуру курса из браузера.
+## Этап 1 — Курсы → Модули → Уроки (CRUD в админке) ✅ ЗАВЕРШЁН (07.04.2026)
 
-- [ ] Prisma-схема: Course, Module, Lesson (с порядком, статусом published)
-- [ ] Admin: список курсов, создать / редактировать / удалить курс
-- [ ] Admin: список модулей внутри курса, drag-and-drop сортировка
-- [ ] Admin: список уроков внутри модуля, drag-and-drop сортировка
-- [ ] Admin: редактор урока с TipTap (заголовки, списки, цитаты, код, картинки, ссылки)
-- [ ] Загрузка картинок в уроке → Hetzner Object Storage
-- [ ] Поле для Kinescope ID в уроке (просто текстовое, без интеграции — это Этап 2)
-- [ ] Публикация/скрытие курса и урока (черновик / опубликован)
-- [ ] Управление доступом: выдать / забрать доступ к курсу для пользователя
-
-**Критерий готовности:** создаю курс «Obsidian PKM», добавляю 2 модуля, в каждом по 3 урока с текстом и картинкой, публикую.
+- [x] Prisma-схема: Course, Module, Lesson (с порядком, статусом published)
+- [x] Admin: список курсов, создать / редактировать / удалить курс
+- [x] Admin: список модулей внутри курса, drag-and-drop сортировка
+- [x] Admin: список уроков внутри модуля, drag-and-drop сортировка
+- [x] Admin: редактор урока с TipTap (заголовки, списки, цитаты, код, картинки, ссылки)
+- [x] Загрузка картинок в уроке → Hetzner Object Storage
+- [x] Поле для Kinescope ID в уроке
+- [x] Публикация/скрытие курса и урока (черновик / опубликован)
+- [x] Управление доступом: выдать / забрать доступ к курсу для пользователя
+- [x] Дизайн: Fira Mono, #F5F5F0, Aubade-карточки
+- [x] Admin: таблица пользователей (/admin/users)
 
 ---
 
-## Этап 2 — Интеграция Kinescope, рендер уроков для ученика
-**Цель:** ученик видит урок с видео Kinescope и текстом.
-
-- [ ] Компонент `KinescopePlayer` — обёртка над `@kinescope/react-kinescope-player`
-- [ ] Рендер урока для ученика: видео (если есть Kinescope ID) + текст + файлы
-- [ ] Загрузка PDF/файлов к уроку (Object Storage), список для скачивания
-- [ ] Страница курса для ученика: список модулей и уроков, статус прохождения
-- [ ] Навигация по урокам: предыдущий / следующий
-- [ ] Блокировка доступа к курсу без enrollment (middleware или server component)
-- [ ] Страница «Мои курсы» в личном кабинете ученика
-
-**Кинескоп-нюанс:** пока без DRM (бесплатный план), просто передаём `videoId` в компонент. Когда появится платный план — добавим signed URLs в отдельной задаче.
-
-**Критерий готовности:** ученик открывает урок, смотрит видео из Kinescope, читает текст, скачивает PDF.
+**Доработки таблицы пользователей (добавить в рамках Этапа 9):**
+- [ ] Фильтры: по роли (Ученик / Куратор / Администратор), по статусу email (подтверждён/нет)
+- [ ] Поиск по имени / email
+- [ ] Пагинация + выбор кол-ва записей на странице (20/50/100)
+- [ ] Ховер-попап на строке: список курсов пользователя со сроками доступа + email + телефон
+- [ ] Быстрые действия в строке: кнопка «Выдать доступ» без перехода на страницу пользователя
 
 ---
 
-## Этап 3 — Прогресс и линейное открытие уроков
-**Цель:** ученик проходит курс последовательно, прогресс сохраняется.
+## Этап 1.5 — Расширенное управление доступом ✅ ЗАВЕРШЁН (07.04.2026)
 
-- [ ] Prisma: таблица `LessonProgress` (userId, lessonId, completedAt)
-- [ ] Кнопка «Урок завершён» — создаёт запись в LessonProgress
-- [ ] Логика блокировки: следующий урок открыт только если предыдущий завершён
-- [ ] Прогресс-бар по курсу (% завершённых уроков)
-- [ ] Прогресс-бар по модулю
-- [ ] API: `POST /api/progress/complete` — принимает lessonId, создаёт прогресс
-- [ ] Иконки статуса уроков в боковой панели: ✓ пройден / 🔒 заблокирован / → текущий
-
-**Примечание:** если в уроке есть тест (Этап 4) или ДЗ (Этап 5) — кнопка «Завершить» появляется только после их прохождения/отправки. Эту логику дорабатываем на соответствующих этапах.
-
-**Критерий готовности:** прохожу урок 1, нажимаю «Завершён» — открывается урок 2. Урок 3 заблокирован. Прогресс-бар показывает 33%.
+- [x] Срок доступа: `expiresAt` в `CourseEnrollment`, просроченный подсвечивается красным
+- [x] Категории курсов: таблица `Category`, `/admin/categories`, привязка к курсу
+- [x] Расширенный энролл: `/admin/users/[userId]` — выбор нескольких курсов + срок одной операцией
+- [x] История доступа: `AccessLog` — каждая операция логируется (кто, когда, метод, примечание)
 
 ---
 
-## Этап 4 — Тесты и квизы
+## Этап 2 — Интеграция Kinescope, рендер уроков для ученика ✅ ЗАВЕРШЁН (07.04.2026)
+
+- [x] Компонент `KinescopePlayer` — обёртка над `@kinescope/react-kinescope-player`
+- [x] Рендер урока для ученика: видео (если есть Kinescope ID) + текст + файлы
+- [x] Загрузка PDF/файлов к уроку (Object Storage), список для скачивания
+- [x] Страница курса для ученика: список модулей и уроков, статус прохождения
+- [x] Навигация по урокам: предыдущий / следующий
+- [x] Блокировка доступа к курсу без enrollment (layout server component)
+- [x] Страница «Мои курсы» в личном кабинете ученика (dashboard)
+- [x] Кнопки Сохранить / Просмотр в редакторе урока
+- [x] Иконка-статус уроков в боковой панели курса (✓ пройден)
+
+---
+
+## Этап 3 — Прогресс ✅ ЗАВЕРШЁН (07.04.2026)
+
+- [x] Prisma: таблица `LessonProgress` (userId, lessonId, completedAt)
+- [x] Кнопка «Урок завершён» — создаёт/удаляет запись в LessonProgress
+- [x] Прогресс-бар по курсу в боковой панели (% завершённых уроков)
+- [x] Прогресс-бар по курсу на дашборде студента
+- [x] Admin bypass: администратор видит все уроки без отметок о прогрессе
+
+---
+
+## Этап 5 — Домашние задания и обратная связь куратора ✅ ЗАВЕРШЁН (07.04.2026)
+
+- [x] Prisma: Homework, HomeworkSubmission, HomeworkFeedback
+- [x] Admin: добавить / редактировать / удалить блок ДЗ к уроку (HomeworkEditor)
+- [x] Ученик: форма отправки ДЗ (текст + файлы → Object Storage)
+- [x] Ученик: видит статус ДЗ и фидбек куратора в карточке урока
+- [x] Куратор / Admin: список ДЗ на проверку (`/curator/homework`)
+- [x] Куратор / Admin: просмотр работы, текстовый комментарий с обратной связью
+- [x] Admin: AdminShell на `/curator/*` маршрутах (сайдбар не пропадает)
+- [x] Admin: реальная статистика на дашборде (студенты, курсы, ДЗ, прогресс)
+
+**Доработки (добавить в рамках Этапа 9):**
+- [ ] Фильтры в списке ДЗ: по имени/email ученика, по уроку, по курсу, по статусу
+- [ ] Поиск по имени/email ученика
+- [ ] Пагинация + выбор кол-ва записей на странице (20/50/100)
+- [ ] Расширенные статусы: «Новое» / «Просмотрено» / «Прокомментировано»
+- [ ] Шаблоны ответов куратора — готовые тексты фидбека, выбираемые из списка
+
+---
+
+## Этап 6 — Обсуждения под уроками ✅ ЗАВЕРШЁН (07.04.2026)
+
+- [x] Prisma: LessonComment (soft-delete через поле `deleted`)
+- [x] Рендер списка комментариев под уроком (server-fetched, client-rendered)
+- [x] Форма отправки комментария (только для enrolled учеников и admin)
+- [x] Модерация: автор, куратор или admin может удалить комментарий
+- [x] Счётчик активных комментариев в заголовке секции
+
+**Не реализовано (добавить в Этап 9 или отдельно):**
+- [ ] `/admin/comments` — сводная таблица всех комментариев по всем урокам
+  - Колонки: №, Имя ученика, Урок (ссылка), Время, кол-во ответов, превью текста
+  - Удалить комментарий прямо из списка
+  - Пагинация
+  - Ссылка в сайдбаре AdminNav
+
+---
+
+## Этап 7 — Email-уведомления ✅ ЗАВЕРШЁН (07.04.2026)
+
+- [x] Базовый HTML email-шаблон (фирменный стиль Second Brain)
+- [x] Приветственное письмо при регистрации (`databaseHooks.user.create.after`)
+- [x] Письмо ученику об открытии доступа к курсу
+- [x] Куратор / Admin: уведомление о новом ДЗ на проверку
+- [x] Ученик: уведомление о полученном фидбеке
+- [x] Resend domain: mailsend.second-brain.ru (verified)
+
+---
+
+## Этап 8 — Импорт уроков из Markdown (Obsidian) ✅ ЗАВЕРШЁН (07.04.2026)
+
+- [x] API: `POST /api/admin/import-md` — принимает .md-файл
+- [x] Парсинг frontmatter (title, kinescopeId, order, published) через `gray-matter`
+- [x] Конвертация Markdown → TipTap JSON через `unified` + `remark-parse`
+- [x] Поддержка: заголовки, параграфы, жирный/курсив/зачёркнутый, инлайн-код, блоки кода, цитаты, списки, ссылки, изображения (HTTP), горизонтальные разделители
+- [x] Очистка Obsidian-синтаксиса: `![[image]]` удаляется, `[[link|alias]]` → текст
+- [x] UI: кнопка «Импорт .md» в редакторе урока — заполняет форму без автосохранения
+
+---
+
+## Этап 9 — Настройки платформы (Admin Settings) ✅ ЗАВЕРШЁН (08.04.2026)
+**Цель:** администратор управляет ключевыми параметрами платформы без правки кода.
+
+### Основное
+- [ ] Название школы (используется в заголовке сайта, подписи писем)
+- [ ] Описание школы (мета-тег description)
+- [ ] Ключевые слова (мета-тег keywords)
+- [ ] Режим тех. работ: вкл/выкл (показывает заглушку всем кроме admin)
+- [ ] Регистрация учеников: вкл/выкл
+
+### Оформление
+- [ ] Логотип школы (загрузка → Object Storage, отображается в шапке)
+- [ ] Фавикон (загрузка → Object Storage)
+- [ ] Показывать логотип: да/нет
+
+### Уведомления
+- [ ] Email(ы) для системных уведомлений (кому слать письма о ДЗ, вопросах, регистрациях)
+- [ ] Уведомление куратору/админу о новом ДЗ: вкл/выкл
+- [ ] Уведомление куратору/админу о новом вопросе ученика: вкл/выкл
+- [ ] Уведомление админу о новой регистрации: вкл/выкл
+- [ ] Уведомление ученику при ответе на ДЗ/вопрос: вкл/выкл
+
+### Данные ученика
+- [ ] Требовать подтверждение email перед доступом к курсам: да/нет
+- [ ] Фамилия при регистрации: обязательная / необязательная / выключена
+- [ ] Телефон при регистрации: обязательный / необязательный / выключен
+
+### Защита
+- [ ] Одна активная сессия на аккаунт: вкл/выкл
+- [ ] CAPTCHA на форме регистрации: вкл/выкл (reCAPTCHA v3)
+
+### Права куратора
+- [ ] Куратор видит ДЗ: по всем курсам / только по назначенным курсам
+- [ ] Куратор может отвечать на вопросы учеников: да/нет
+- [ ] Куратор видит список всех студентов: да/нет
+
+### Вставка кода
+- [ ] Произвольный код в `<head>` (Yandex.Metrika, Google Analytics, пиксели)
+- [ ] Произвольный код в `<body>` (виджеты, чаты поддержки)
+
+### Юридические документы
+- [ ] URL Политики конфиденциальности (ссылка на внешний документ)
+- [ ] URL Согласия на обработку персональных данных
+- [ ] URL Договора-оферты
+- [ ] Показывать чекбокс «Я принимаю условия» при регистрации: да/нет
+- [ ] Реквизиты организации (текстовое поле, отображается в подвале)
+
+### Соц. сети
+- [ ] YouTube: одна ссылка
+- [ ] VK: несколько ссылок (название + URL), например «Основная группа» и «Канал»
+- [ ] Telegram: несколько ссылок (название + URL), например «Основной канал» и «Канал курса»
+(отображаются в подвале личного кабинета ученика; хранятся как JSON-массив в Settings)
+
+### Вопросы учеников
+- [ ] Система вопросов глобально: вкл/выкл
+- [ ] Куратор/админ может написать ученику первым: да/нет
+- [ ] Вопросы только по курсам ученика: да/нет
+- [ ] Включать вопросы для новых курсов автоматически: да/нет
+
+**Хранение:** таблица `Settings` (key-value), доступна через `getSettings()` в server components.  
+**Критерий готовности:** меняю название школы → оно появляется в заголовке. Включаю тех. работы → ученики видят заглушку. Куратор привязан к курсу — видит только его ДЗ.
+
+---
+
+## Этап 11 — Импорт/Экспорт учеников и миграция с emdesell
+**Цель:** все пользователи и контент перенесены в новую LMS. Раздел `/admin/import-export`.
+
+### Импорт учеников (CSV)
+- [ ] Скачать файл-шаблон CSV (Email, Имя, Фамилия, Телефон)
+- [ ] Загрузка CSV, поддержка кодировок Windows-1251 и UTF-8
+- [ ] Опция: подтверждать email автоматически (да/нет)
+- [ ] Опция: обновлять уже существующие аккаунты (да/нет)
+- [ ] Присвоение доступов к курсам при импорте (выбор курса + срок в днях, 0 = бессрочно)
+- [ ] Опция: отправить письмо-уведомление ученику (со ссылкой для установки пароля)
+- [ ] Предпросмотр перед применением (таблица: кто создаётся, кто обновляется, кому даётся доступ)
+- [ ] Применить импорт — создать пользователей, выдать доступы, отправить письма
+
+### Экспорт учеников (CSV)
+- [ ] Все ученики или фильтр по конкретному курсу/доступу
+- [ ] Фильтр по просмотрам уроков (экспортировать только тех кто смотрел)
+- [ ] Выбор кодировки: Windows-1251 (для Excel) / UTF-8
+- [ ] Поля: Email, Имя, Фамилия, Телефон, Дата регистрации, Курсы, Прогресс
+
+### Миграция контента
+- [ ] Чек-лист ручного переноса контента (уроки, PDF, структура курсов)
+- [ ] Скрипт проверки целостности: все enrolled пользователи имеют доступ к нужным курсам
+- [ ] QA: проверить 10 случайных аккаунтов после импорта
+
+**Критерий готовности:** загружаю CSV из emdesell → предпросмотр показывает корректные данные → применяю → ученики получают письма → могут войти и продолжить обучение.
+
+---
+
+## Этап 12 — Telegram-бот и аналитика
+**Цель:** уведомления в Telegram для всех участников, базовая аналитика.
+
+**Настройки (в разделе Настройки → Telegram):**
+- Токен бота (вводится в админке, хранится в Settings)
+- Интеграция вкл/выкл глобально
+- Показывать кнопку «Подключить Telegram» в кабинете ученика: да/нет
+
+**Уведомления куратору/админу:**
+- [ ] Новое ДЗ на проверку
+- [ ] Новый вопрос от ученика
+- [ ] Новая регистрация студента
+- [ ] Ошибки платформы (500-е, failed email и т.д.)
+
+**Уведомления ученику:**
+- [ ] Получен фидбек по ДЗ
+- [ ] Ответ куратора на вопрос
+- [ ] Открыт доступ к новому курсу
+
+**Реализация:**
+- [ ] Ученик привязывает Telegram через `/start` в боте (сохраняется `telegramChatId` в User)
+- [ ] Кнопка «Подключить Telegram» в личном кабинете ученика
+- [ ] Админ/куратор вводит свой `chatId` в профиле или через `/start`
+- [ ] Настройки бота в разделе Настройки → Telegram
+- [ ] Yandex.Metrika: базовое подключение (pageviews)
+- [ ] Admin: простая страница аналитики (активные ученики, прогресс по курсам)
+
+---
+
+## Этап 13 — Тесты и квизы
 **Цель:** можно добавить тест к уроку, ученик проходит и получает результат.
 
-- [ ] Prisma: Quiz, QuizQuestion, QuizOption, QuizAttempt
-- [ ] Admin: создание теста к уроку (добавить вопрос → варианты ответов → отметить правильный)
+- [ ] Prisma: Quiz, QuizQuestion, QuizOption, QuizAttempt (схема уже есть)
+- [ ] Admin: создание теста к уроку (вопрос → варианты → отметить правильный)
 - [ ] Типы вопросов: одиночный выбор, множественный выбор, короткий текст
 - [ ] Рендер теста в уроке для ученика
 - [ ] Авто-проверка (single/multiple choice), результат сразу
@@ -87,105 +273,10 @@
 
 ---
 
-## Этап 5 — Домашние задания и обратная связь куратора
-**Цель:** ученик сдаёт ДЗ, куратор оставляет комментарий.
-
-- [ ] Prisma: Homework, HomeworkSubmission, HomeworkFeedback
-- [ ] Admin: добавить блок ДЗ к уроку (текст задания)
-- [ ] Ученик: форма отправки ДЗ (текст + файлы → Object Storage)
-- [ ] Ученик: ДЗ засчитывается **автоматически при отправке** (урок открывается сразу)
-- [ ] Куратор: список ДЗ на проверку (все или по курсу), статус «новое / просмотрено»
-- [ ] Куратор: просмотр ДЗ, оставить текстовый комментарий
-- [ ] История обмена по ДЗ (ученик может ответить на комментарий куратора)
-- [ ] Уведомление ученику когда куратор оставил комментарий (заглушка — реальные email на Этапе 7)
-
-**Критерий готовности:** отправляю ДЗ — урок открывается. Куратор заходит в панель, видит ДЗ, оставляет комментарий. Ученик видит комментарий в карточке урока.
-
----
-
-## Этап 6 — Обсуждения под уроками
-**Цель:** ученики могут общаться под каждым уроком.
-
-- [ ] Prisma: LessonComment (с поддержкой вложенных ответов — опционально)
-- [ ] Рендер треда комментариев под уроком
-- [ ] Форма отправки комментария (только для enrolled учеников)
-- [ ] Модерация: куратор/админ может удалить комментарий
-- [ ] Пагинация или infinite scroll для длинных тредов
-
-**Критерий готовности:** ученик оставляет комментарий, другой ученик его видит, куратор может удалить.
-
----
-
-## Этап 7 — Email-уведомления
-**Цель:** все участники получают нужные письма через Resend.
-
-- [ ] Базовый email-шаблон (HTML, фирменный стиль)
-- [ ] Ученик: подтверждение регистрации (уже частично с Этапа 0, финализировать)
-- [ ] Ученик: письмо когда куратор оставил комментарий к ДЗ
-- [ ] Ученик: письмо когда ответили на его комментарий в уроке
-- [ ] Куратор / Админ: новое ДЗ на проверку
-- [ ] Куратор / Админ: новый комментарий в обсуждении
-- [ ] Админ: зарегистрирован новый ученик
-- [ ] Очередь отправки (edge case: Resend временно недоступен → retry)
-
-**Критерий готовности:** отправляю ДЗ — куратор получает email. Куратор отвечает — ученик получает email.
-
----
-
-## Этап 8 — Импорт уроков из Markdown
-**Цель:** могу импортировать урок из .md-файла Obsidian одним действием.
-
-- [ ] API: `POST /api/admin/lessons/import-md` — принимает .md-файл
-- [ ] Парсинг frontmatter (title, order, kinescopeId и кастомные поля) → метаданные урока
-- [ ] Конвертация Markdown-тела в TipTap JSON (через remark / rehype)
-- [ ] UI в админке: кнопка «Импортировать из .md» на странице урока
-- [ ] Обработка картинок в Markdown (локальные пути → Object Storage)
-
-**Критерий готовности:** беру .md-файл из Obsidian с frontmatter и текстом → импортирую → урок создан с правильными метаданными и контентом.
-
----
-
-## Этап 9 — Миграция с emdesell
-**Цель:** все пользователи и контент перенесены в новую LMS.
-
-- [ ] Скрипт импорта пользователей из CSV-экспорта emdesell (email, имя, курсы)
-- [ ] Создание пользователей без пароля + письмо «установите пароль»
-- [ ] Назначение доступов к курсам по данным из CSV
-- [ ] Чек-лист ручного переноса контента (уроки, PDF, структура курсов)
-- [ ] Скрипт проверки целостности: все enrolled пользователи имеют доступ к нужным курсам
-- [ ] QA: проверить 10 случайных аккаунтов после импорта
-
-**Критерий готовности:** все ученики из emdesell могут войти в новую LMS и продолжить обучение.
-
----
-
-## Этап 10 — Telegram-бот и аналитика
-**Цель:** получаю уведомления в Telegram, вижу базовую аналитику.
-
-- [ ] Telegram-бот: уведомление куратору/админу о новом ДЗ
-- [ ] Telegram-бот: уведомление об ошибках (500-е, failed email и т.д.)
-- [ ] Yandex.Metrika: базовое подключение (pageviews)
-- [ ] Admin: простая страница аналитики (активные ученики, прогресс по курсам)
-
----
-
-## Этап 11 — Деплой на Hetzner
-**Цель:** LMS работает на production-сервере по своему домену с SSL.
-
-- [ ] `docker-compose.prod.yml`: app + PostgreSQL + Redis + Nginx
-- [ ] Nginx: SSL через Let's Encrypt (certbot), reverse proxy на Next.js
-- [ ] GitHub Actions: CI/CD pipeline (lint → build → push Docker image → deploy)
-- [ ] Резервное копирование PostgreSQL (cron → Object Storage)
-- [ ] Мониторинг uptime (UptimeRobot или аналог)
-- [ ] `.env` на сервере через Hetzner Secrets Manager или vault-файл вне репозитория
-- [ ] Smoke-тест: регистрация → урок → ДЗ → куратор → email
-
-**Критерий MVP готов:** создаю курс из админки, добавляю уроки с Kinescope, импортирую ученика из emdesell, даю доступ — ученик регистрируется, проходит урок, сдаёт тест, отправляет ДЗ, получает автодоступ к следующему уроку, позже — комментарий куратора на email.
-
----
-
 ## Бэклог (после MVP)
 
+- Резервное копирование PostgreSQL (cron → Object Storage)
+- GitHub Actions: CI/CD pipeline (lint → build → push Docker image → deploy)
 - Сертификаты по окончании курса
 - Геймификация (баллы, бейджи, рейтинги)
 - Промокоды и интеграция с платёжными системами
@@ -193,3 +284,35 @@
 - Kinescope DRM (signed URLs) — при переходе на платный план
 - Водяные знаки на PDF и картинках
 - Мобильное приложение
+- **Вопросы учеников** — система тикетов `/admin/questions` и `/questions` для ученика:
+  - Таблица в админке: №, Имя, Курс, Тема, Статус (Ожидает / Отвечено), Дата
+  - Статусы отсортированы: сначала «Ожидает ответа»
+  - Куратор/Admin может создать обращение первым (написать ученику)
+  - Внутри тикета: история переписки, смена статуса
+  - **База знаний** — FAQ, который ученик видит до отправки вопроса
+  - **Шаблоны ответов** — куратор выбирает готовый ответ из списка
+  - Email + Telegram уведомления обеим сторонам
+
+- **Главная страница ученика** — кастомизируемый экран после входа:
+  - Приветственный баннер с описанием школы (редактируется в настройках)
+  - Список курсов ученика с прогрессом
+  - Блок бесплатных/открытых материалов (статьи, PDF, видео)
+  - Анонсы ближайших событий и новых курсов
+
+- **Медиатека (Файлы)** — централизованное файловое хранилище `/admin/files`:
+  - Prisma: `MediaFolder` (id, name, courseId?, createdAt) + `MediaFile` (id, folderId?, name, url, size, mimeType, uploadedById, createdAt)
+  - Папки автоматически создаются по курсам + «Common» для общих файлов
+  - Вид: грид (карточки с иконкой типа) или список — переключатель
+  - Breadcrumb-навигация: Все файлы / Название папки
+  - Загрузка файлов (PDF, изображения, любые) → Object Storage
+  - Создание папки вручную
+  - Клик на файл → диалог: имя (редактируемое), дата загрузки, размер, автор
+  - Действия в диалоге: скопировать ссылку, скачать, удалить
+  - Вставка файлов из медиатеки в урок (вместо повторной загрузки)
+
+- **Цифровой сад** — публичный раздел платформы для сообщества:
+  - Методические материалы и статьи (PKM, Obsidian, Second Brain)
+  - Рекомендованная литература с аннотациями
+  - Записи открытых встреч и вебинаров
+  - Календарь: предстоящие открытые уроки, запуски курсов, события
+  - Возможно: публичный Obsidian-like граф знаний

TECHNICAL.md

@@ -0,0 +1,267 @@
+# TECHNICAL — LMS Second Brain
+
+Живая документация проекта. Обновляется по мере разработки.  
+Роадмап и планирование — в `ROADMAP.md`. Здесь — факты о том, как всё устроено.
+
+---
+
+## Инфраструктура
+
+| Компонент | Значение |
+|---|---|
+| **Сервер** | Hetzner VPS — 8 vCPU / 16 GB RAM / 320 GB NVMe |
+| **IP** | 178.104.27.196 |
+| **Домен LMS** | https://school.second-brain.ru |
+| **Reverse proxy** | Caddy (auto HTTPS через Let's Encrypt) |
+| **Порт приложения** | 3010 (внутри контейнера — 3000) |
+| **БД** | PostgreSQL 16 (контейнер `lms-sb-db-1`) |
+| **Object Storage** | Hetzner Object Storage, регион Nuremberg |
+| **Бакет** | `second-brain-lms` (публичный, read-only) |
+| **Endpoint S3** | https://nbg1.your-objectstorage.com |
+| **Git-репозиторий** | https://git.second-brain.ru/admins/lms-sb |
+| **Email-сервис** | Resend, домен `mailsend.second-brain.ru` (verified) |
+| **From-адрес** | noreply@mailsend.second-brain.ru |
+
+### Деплой
+
+```bash
+# На сервере: /root/digital-household/lms-sb/
+git pull ...
+docker compose -f docker-compose.prod.yml up -d --build
+```
+
+При старте контейнер автоматически запускает `prisma migrate deploy`, затем `node server.js`.
+
+### .env на сервере
+
+Файл `/root/digital-household/lms-sb/.env`:
+
+```
+DB_PASSWORD=lms_cd5041e961a3050db359aa15
+BETTER_AUTH_SECRET=<secret>
+RESEND_API_KEY=re_VX7TCnjs_N2geRqvveHjVfbsSyr4VbmzL
+EMAIL_FROM=noreply@mailsend.second-brain.ru
+S3_ENDPOINT=https://nbg1.your-objectstorage.com
+S3_BUCKET=second-brain-lms
+S3_ACCESS_KEY=<ключ>
+S3_SECRET_KEY=<секрет>
+S3_REGION=eu-central
+```
+
+---
+
+## Стек
+
+| Слой | Технология | Версия |
+|---|---|---|
+| Фреймворк | Next.js (App Router) | 16.2.2 |
+| Язык | TypeScript | 5.x |
+| UI | React | 19 |
+| Стили | Tailwind CSS (CSS-based config) | 4.x |
+| UI-компоненты | shadcn/ui (базируется на Base UI, **не Radix**) | latest |
+| ORM | Prisma | 7.x |
+| Auth | Better Auth | 1.6.0 |
+| WYSIWYG | TipTap | 2.x |
+| Drag-and-drop | @dnd-kit | latest |
+| Шрифт | Fira Mono (400/500/700, Latin + Cyrillic) | Google Fonts |
+| Email | Resend | latest |
+| S3 | @aws-sdk/client-s3 | 3.x |
+| БД | PostgreSQL | 16 |
+
+### Важные нюансы стека
+
+- **shadcn/ui v4** использует `@base-ui/react`, а не Radix. Нет `asChild`. Триггеры — обычные элементы.
+- **Prisma 7** не генерирует `index.ts`. Импорт: `from "@/generated/prisma/client"`, не `from "@/generated/prisma"`.
+- **Prisma 7** требует адаптер: `new PrismaPg({ connectionString })` — иначе `PrismaClient()` бросает ошибку.
+- **Better Auth** использует `scrypt` по умолчанию. В этом проекте **переключён на bcrypt** (в `auth.ts` настроены `password.hash` / `password.verify`).
+- **`NEXT_PUBLIC_*`** переменные запекаются при сборке. `auth-client.ts` не использует `baseURL` — клиент сам берёт `window.location.origin`.
+- **Next.js 16** использует `proxy.ts` вместо `middleware.ts` (и экспортируемая функция называется `proxy`, не `middleware`).
+- **Tailwind v4**: конфиг только в CSS через `@import "tailwindcss"` и `@theme`. Нет `tailwind.config.ts`.
+
+---
+
+## Дизайн-система
+
+Стиль: **Second Brain Aubade** — типографский, монохромный, с газетным характером.
+
+| Токен | Значение |
+|---|---|
+| Шрифт | Fira Mono (весь UI) |
+| Фон страницы | `#F5F5F0` (тёплый off-white) |
+| Текст основной | `#323232` (тёмный уголь) |
+| Текст вторичный | `#666666` |
+| Поверхность / surface | `#E8E8E0` |
+| Акцент / highlight | `#E8F0D8` (зелёный) |
+| Divider / border | `#AAAAAA` |
+| Hover | `#D8D8D0` |
+| Фон сайдбара (тёмный) | `#2A2A28` |
+| Активный пункт сайдбара | `#E8F0D8` (зелёный) |
+
+**Aubade-эффект** — фирменный стиль карточек и кнопок:
+- Border: `2px solid #AAAAAA`
+- Box-shadow: `4px 4px 0 0 #AAAAAA` (смещение без размытия)
+- Hover: `transform: translate(-2px, -2px)` + shadow `6px 6px`
+- Active (кнопка): `transform: translate(2px, 2px)` + shadow убирается
+
+CSS-классы: `.card-aubade`, `.btn-aubade`, `.btn-aubade-accent`, `.tag-aubade`
+
+---
+
+## Требования к медиафайлам
+
+### Обложка курса (`Course.coverImage`)
+
+| Параметр | Требование |
+|---|---|
+| **Соотношение сторон** | **16 : 9** (горизонтальный прямоугольник) |
+| **Рекомендуемое разрешение** | 1280 × 720 px (HD) или 1920 × 1080 px (Full HD) |
+| **Минимальное разрешение** | 800 × 450 px |
+| **Максимальный размер файла** | 5 MB |
+| **Форматы** | JPG, PNG, WebP |
+| **Цветовое пространство** | sRGB |
+| **Где хранится** | Hetzner Object Storage, бакет `second-brain-lms`, путь `uploads/<uuid>.ext` |
+| **Доступ** | Публичный URL (прямая ссылка на файл) |
+
+> Пример URL: `https://nbg1.your-objectstorage.com/second-brain-lms/uploads/abc123.jpg`
+
+### Изображения в уроках (TipTap)
+
+| Параметр | Требование |
+|---|---|
+| **Соотношение сторон** | Любое — TipTap встраивает как `<img>` с `max-width: 100%` |
+| **Рекомендуемая ширина** | 1200 px (контент-зона урока) |
+| **Максимальный размер файла** | 10 MB |
+| **Форматы** | JPG, PNG, GIF, WebP |
+| **Где хранится** | Hetzner Object Storage, путь `uploads/<uuid>.ext` |
+
+### PDF и файлы к уроку (Этап 2+)
+
+| Параметр | Требование |
+|---|---|
+| **Форматы** | PDF, ZIP, DOCX, XLSX, PPTX |
+| **Максимальный размер** | 100 MB |
+| **Где хранится** | Hetzner Object Storage, путь `lessons/<lessonId>/files/<uuid>.ext` |
+
+### Аватары пользователей (если добавим)
+
+| Параметр | Требование |
+|---|---|
+| **Соотношение сторон** | 1 : 1 (квадрат) |
+| **Рекомендуемый размер** | 256 × 256 px |
+| **Максимальный размер файла** | 2 MB |
+| **Форматы** | JPG, PNG, WebP |
+
+---
+
+## Роли и доступ
+
+| Роль | Маршруты | Описание |
+|---|---|---|
+| `admin` | `/admin/*`, `/curator/*`, `/dashboard` | Полный доступ |
+| `curator` | `/curator/*`, `/dashboard` | Проверка ДЗ, комментарии |
+| `student` | `/dashboard`, `/courses/*` | Просмотр курсов, прогресс |
+
+Защита маршрутов — в `src/proxy.ts` + проверка сессии в каждом layout/page.
+
+---
+
+## API-маршруты
+
+| Метод | Путь | Описание | Кто может |
+|---|---|---|---|
+| `POST` | `/api/auth/[...all]` | Better Auth handler | Все |
+| `POST` | `/api/admin/upload` | Загрузка файла в S3, возвращает `{ url, key }` | admin |
+
+---
+
+## Структура БД (ключевые таблицы)
+
+```
+User            — id, email, name, role, emailVerified
+Session         — Better Auth sessions
+Account         — Better Auth credentials (bcrypt password)
+Verification    — Better Auth email verification tokens
+
+Category        — id, title, slug, order
+Course          — id, slug, title, description, coverImage, published, order, categoryId
+Module          — id, courseId, title, order
+Lesson          — id, moduleId, title, content (JSON), kinescopeId, published, order
+LessonFile      — id, lessonId, name, url, size
+
+CourseEnrollment — userId + courseId (PK), enrolledAt, expiresAt
+AccessLog       — id, courseId, userId, action, method, grantedById, note, createdAt
+LessonProgress  — userId + lessonId (PK), completedAt
+
+Quiz            — id, lessonId, showAnswers
+QuizQuestion    — id, quizId, text, type (SINGLE/MULTIPLE/TEXT), order
+QuizOption      — id, questionId, text, isCorrect, order
+QuizAttempt     — id, userId, quizId, score, answers (JSON), completedAt
+
+Homework        — id, lessonId, description
+HomeworkSubmission — id, homeworkId, userId, text, files (JSON), submittedAt
+HomeworkFeedback   — id, submissionId, curatorId, text, createdAt
+
+LessonComment   — id, lessonId, userId, text, deleted, createdAt
+```
+
+Миграции: `prisma/migrations/` — **никогда не редактировать вручную**.
+
+---
+
+## Тестовые аккаунты (seed)
+
+| Email | Пароль | Роль |
+|---|---|---|
+| admin@second-brain.ru | Password123! | admin |
+| curator@second-brain.ru | Password123! | curator |
+| student@second-brain.ru | Password123! | student |
+
+---
+
+## Что сделано (по этапам)
+
+### Этап 0 — Каркас + Auth ✅
+- Next.js 16.2.2 + TypeScript + Tailwind v4
+- PostgreSQL 16 + Prisma 7 + полная LMS-схема
+- Better Auth: email/password, роли, сессии
+- proxy.ts: защита маршрутов
+- Дашборды для 3 ролей (admin / curator / student)
+- Dockerfile multi-stage + docker-compose.prod.yml
+- Caddy: school.second-brain.ru → порт 3010
+
+### Этап 1 — CRUD курсов в админке ✅
+- Список курсов: `/admin/courses`
+- Создание курса (диалог), редактирование, удаление
+- Обложка курса: загрузка в S3, требования — см. раздел «Медиафайлы»
+- Модули: drag-and-drop сортировка, CRUD
+- Уроки: drag-and-drop сортировка, CRUD
+- Редактор урока: TipTap (Bold, Italic, H2/H3, списки, цитата, код, ссылки, изображения)
+- Загрузка изображений в урок → S3
+- Поле Kinescope ID (текстовое)
+- Публикация / скрытие курса и урока
+- Управление доступом к курсу (выдать / отозвать)
+- Страница пользователей: `/admin/users`
+- Дизайн Second Brain Aubade (Fira Mono, #F5F5F0, карточки с тенью)
+
+### Этап 1.5 — Расширенное управление доступом ✅
+- Категории курсов: `/admin/categories`, CRUD, привязка к курсу
+- Срок доступа: поле `expiresAt` при энролле, просроченный подсвечивается красным
+- Страница ученика `/admin/users/[userId]`: мультиэнролл (несколько курсов + срок)
+- История доступа: таблица `AccessLog`, отображается на странице курса и ученика
+- Hetzner Object Storage подключён: бакет `second-brain-lms`, Nuremberg
+
+### Этап 3 — Прогресс, ДЗ, Email ✅
+- Прогресс студента: кнопка «Отметить как пройденный», галочки и прогресс-бар в сайдбаре, прогресс на дашборде
+- Домашние задания: редактор ДЗ в уроке (admin), сдача текстом + файлами (student), проверка и фидбек (curator/admin)
+- Куратор-панель: `/curator/dashboard` со статистикой, `/curator/homework` список, страница проверки
+- Админ имеет доступ к куратор-маршрутам через пункт «ДЗ на проверку» в сайдбаре
+- Email уведомления через Resend: доступ к курсу, новая работа, фидбек получен, приветствие
+
+---
+
+## Известные ограничения / технический долг
+
+- `requireEmailVerification: true` в Better Auth — seed-пользователи вставлены напрямую через SQL с `emailVerified = true`
+- Загрузка файлов через `/api/admin/upload` — нет ограничения по размеру на уровне Next.js (только S3). При необходимости добавить middleware с проверкой `Content-Length`
+- Drag-and-drop обновляет порядок через Server Actions — при быстрых последовательных перетаскиваниях возможны race conditions (некритично для MVP)
+- `expiresAt` проверяется только в UI (красная подсветка). Блокировка доступа по сроку на уровне middleware — в рамках Этапа 2

components.json

@@ -0,0 +1,25 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "base-nova",
+  "rsc": true,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "src/app/globals.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "iconLibrary": "lucide",
+  "rtl": false,
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "menuColor": "default",
+  "menuAccent": "subtle",
+  "registries": {}
+}

next.config.ts

@@ -2,6 +2,7 @@ import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
   output: "standalone",
+  transpilePackages: ["unified", "remark-parse"],
 };
 
 export default nextConfig;

package.json

@@ -13,17 +13,42 @@
     "seed": "ts-node --project tsconfig.json prisma/seed.ts"
   },
   "dependencies": {
+    "@aws-sdk/client-s3": "^3.1025.0",
+    "@aws-sdk/s3-request-presigner": "^3.1025.0",
+    "@base-ui/react": "^1.3.0",
+    "@dnd-kit/core": "^6.3.1",
+    "@dnd-kit/sortable": "^10.0.0",
+    "@dnd-kit/utilities": "^3.2.2",
+    "@kinescope/react-kinescope-player": "^0.5.4",
     "@prisma/adapter-pg": "^7.6.0",
     "@prisma/client": "^7.6.0",
+    "@tailwindcss/typography": "^0.5.19",
+    "@tiptap/extension-image": "^3.22.2",
+    "@tiptap/extension-link": "^3.22.2",
+    "@tiptap/extension-placeholder": "^3.22.2",
+    "@tiptap/extension-underline": "^3.22.2",
+    "@tiptap/pm": "^3.22.2",
+    "@tiptap/react": "^3.22.2",
+    "@tiptap/starter-kit": "^3.22.2",
     "bcryptjs": "^3.0.3",
     "better-auth": "^1.6.0",
+    "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "gray-matter": "^4.0.3",
+    "iconv-lite": "^0.7.2",
+    "lucide-react": "^1.7.0",
     "next": "16.2.2",
+    "next-themes": "^0.4.6",
     "pg": "^8.20.0",
     "react": "19.2.4",
     "react-dom": "19.2.4",
+    "remark-parse": "^11.0.0",
     "resend": "^6.10.0",
+    "shadcn": "^4.1.2",
+    "sonner": "^2.0.7",
     "tailwind-merge": "^3.5.0",
+    "tw-animate-css": "^1.4.0",
+    "unified": "^11.0.5",
     "zod": "^4.3.6"
   },
   "devDependencies": {

prisma/migrations/20260407100000_add_categories_expiry_access_log/migration.sql

@@ -0,0 +1,38 @@
+-- CreateTable: Category
+CREATE TABLE "Category" (
+    "id" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "slug" TEXT NOT NULL,
+    "order" INTEGER NOT NULL DEFAULT 0,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "Category_pkey" PRIMARY KEY ("id")
+);
+CREATE UNIQUE INDEX "Category_slug_key" ON "Category"("slug");
+
+-- Add categoryId to Course
+ALTER TABLE "Course" ADD COLUMN "categoryId" TEXT;
+ALTER TABLE "Course" ADD CONSTRAINT "Course_categoryId_fkey"
+    FOREIGN KEY ("categoryId") REFERENCES "Category"("id")
+    ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- Add expiresAt to CourseEnrollment
+ALTER TABLE "CourseEnrollment" ADD COLUMN "expiresAt" TIMESTAMP(3);
+
+-- CreateTable: AccessLog
+CREATE TABLE "AccessLog" (
+    "id" TEXT NOT NULL,
+    "courseId" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "action" TEXT NOT NULL,
+    "method" TEXT NOT NULL DEFAULT 'manual',
+    "grantedById" TEXT,
+    "note" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "AccessLog_pkey" PRIMARY KEY ("id")
+);
+ALTER TABLE "AccessLog" ADD CONSTRAINT "AccessLog_courseId_fkey"
+    FOREIGN KEY ("courseId") REFERENCES "Course"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "AccessLog" ADD CONSTRAINT "AccessLog_userId_fkey"
+    FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "AccessLog" ADD CONSTRAINT "AccessLog_grantedById_fkey"
+    FOREIGN KEY ("grantedById") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;

prisma/migrations/20260408100000_add_settings/migration.sql

@@ -0,0 +1,8 @@
+-- CreateTable
+CREATE TABLE "Settings" (
+    "key" TEXT NOT NULL,
+    "value" TEXT NOT NULL,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Settings_pkey" PRIMARY KEY ("key")
+);

prisma/migrations/20260408200000_add_module_description/migration.sql

@@ -0,0 +1 @@
+ALTER TABLE "Module" ADD COLUMN "description" TEXT;

prisma/schema.prisma

@@ -31,6 +31,8 @@ model User {
   submissions     HomeworkSubmission[]
   comments        LessonComment[]
   feedbacks       HomeworkFeedback[]
+  accessLogs      AccessLog[] @relation("AccessLogUser")
+  adminAccessLogs AccessLog[] @relation("AccessLogAdmin")
 }
 
 model Session {
@@ -77,6 +79,16 @@ model Verification {
 // LMS core tables
 // ─────────────────────────────────────────────
 
+model Category {
+  id        String   @id @default(cuid())
+  title     String
+  slug      String   @unique
+  order     Int      @default(0)
+  createdAt DateTime @default(now())
+
+  courses Course[]
+}
+
 model Course {
   id          String   @id @default(cuid())
   slug        String   @unique
@@ -85,17 +97,21 @@ model Course {
   coverImage  String?
   published   Boolean  @default(false)
   order       Int      @default(0)
+  categoryId  String?
   createdAt   DateTime @default(now())
   updatedAt   DateTime @updatedAt
 
+  category    Category?          @relation(fields: [categoryId], references: [id], onDelete: SetNull)
   modules     Module[]
   enrollments CourseEnrollment[]
+  accessLogs  AccessLog[]
 }
 
 model Module {
   id          String   @id @default(cuid())
   courseId    String
   title       String
+  description String?
   order       Int      @default(0)
   createdAt   DateTime @default(now())
   updatedAt   DateTime @updatedAt
@@ -138,6 +154,7 @@ model CourseEnrollment {
   userId     String
   courseId   String
   enrolledAt DateTime  @default(now())
+  expiresAt  DateTime?
 
   user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
   course Course @relation(fields: [courseId], references: [id], onDelete: Cascade)
@@ -145,6 +162,21 @@ model CourseEnrollment {
   @@id([userId, courseId])
 }
 
+model AccessLog {
+  id          String   @id @default(cuid())
+  courseId    String
+  userId      String
+  action      String   // "granted" | "revoked"
+  method      String   @default("manual")
+  grantedById String?
+  note        String?
+  createdAt   DateTime @default(now())
+
+  course      Course @relation(fields: [courseId], references: [id], onDelete: Cascade)
+  user        User   @relation("AccessLogUser", fields: [userId], references: [id], onDelete: Cascade)
+  grantedBy   User?  @relation("AccessLogAdmin", fields: [grantedById], references: [id], onDelete: SetNull)
+}
+
 model LessonProgress {
   userId      String
   lessonId    String
@@ -264,3 +296,13 @@ model LessonComment {
   lesson Lesson @relation(fields: [lessonId], references: [id], onDelete: Cascade)
   user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
 }
+
+// ─────────────────────────────────────────────
+// Platform Settings (key-value store)
+// ─────────────────────────────────────────────
+
+model Settings {
+  key       String   @id
+  value     String   @db.Text
+  updatedAt DateTime @updatedAt
+}

src/app/(auth)/login/login-form.tsx

@@ -39,9 +39,9 @@ export function LoginForm() {
   }
 
   return (
-    <form onSubmit={handleSubmit} className="space-y-4">
-      <div>
-        <label className="block text-sm font-medium text-gray-700 mb-1">
+    <form onSubmit={handleSubmit} className="space-y-5">
+      <div className="space-y-1.5">
+        <label className="block text-xs uppercase tracking-widest font-bold" style={{ color: "var(--muted-foreground)" }}>
           Email
         </label>
         <input
@@ -49,12 +49,20 @@ export function LoginForm() {
           value={email}
           onChange={(e) => setEmail(e.target.value)}
           required
-          className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-amber-400"
+          className="w-full px-3 py-2 text-sm bg-transparent"
+          style={{
+            border: "2px solid var(--border)",
+            color: "var(--foreground)",
+            fontFamily: "var(--font-sans)",
+            outline: "none",
+          }}
+          onFocus={(e) => (e.target.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.target.style.borderColor = "var(--border)")}
           placeholder="you@example.com"
         />
       </div>
-      <div>
-        <label className="block text-sm font-medium text-gray-700 mb-1">
+      <div className="space-y-1.5">
+        <label className="block text-xs uppercase tracking-widest font-bold" style={{ color: "var(--muted-foreground)" }}>
           Пароль
         </label>
         <input
@@ -62,21 +70,34 @@ export function LoginForm() {
           value={password}
           onChange={(e) => setPassword(e.target.value)}
           required
-          className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-amber-400"
+          className="w-full px-3 py-2 text-sm bg-transparent"
+          style={{
+            border: "2px solid var(--border)",
+            color: "var(--foreground)",
+            fontFamily: "var(--font-sans)",
+            outline: "none",
+          }}
+          onFocus={(e) => (e.target.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.target.style.borderColor = "var(--border)")}
           placeholder="••••••••"
         />
       </div>
-      {error && <p className="text-red-500 text-sm">{error}</p>}
+      {error && (
+        <p className="text-sm" style={{ color: "var(--destructive)" }}>
+          {error}
+        </p>
+      )}
       <button
         type="submit"
         disabled={loading}
-        className="w-full bg-amber-500 hover:bg-amber-600 text-white font-medium py-2 px-4 rounded-lg transition-colors disabled:opacity-50"
+        className="btn-aubade w-full justify-center"
+        style={loading ? { opacity: 0.6, cursor: "not-allowed" } : undefined}
       >
         {loading ? "Вход..." : "Войти"}
       </button>
-      <p className="text-center text-sm text-gray-500">
+      <p className="text-center text-xs" style={{ color: "var(--muted-foreground)" }}>
         Нет аккаунта?{" "}
-        <Link href="/register" className="text-amber-600 hover:underline">
+        <Link href="/register" className="underline" style={{ color: "var(--foreground)" }}>
           Зарегистрироваться
         </Link>
       </p>

src/app/(auth)/login/page.tsx

@@ -2,13 +2,17 @@ import { LoginForm } from "./login-form";
 
 export default function LoginPage() {
   return (
-    <div className="min-h-screen flex items-center justify-center bg-amber-50">
-      <div className="w-full max-w-md">
+    <div className="min-h-screen flex items-center justify-center" style={{ backgroundColor: "var(--background)" }}>
+      <div className="w-full max-w-sm">
         <div className="text-center mb-8">
-          <h1 className="text-3xl font-bold text-amber-900">Second Brain</h1>
-          <p className="text-amber-700 mt-2">Войдите в свой аккаунт</p>
+          <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>
+            Second Brain
+          </h1>
+          <p className="mt-1 text-sm uppercase tracking-widest" style={{ color: "var(--muted-foreground)", fontSize: "0.65rem" }}>
+            Образовательная платформа
+          </p>
         </div>
-        <div className="bg-white rounded-2xl shadow-sm border border-amber-100 p-8">
+        <div className="card-aubade p-8">
           <LoginForm />
         </div>
       </div>

src/app/(auth)/register/page.tsx

@@ -2,13 +2,17 @@ import { RegisterForm } from "./register-form";
 
 export default function RegisterPage() {
   return (
-    <div className="min-h-screen flex items-center justify-center bg-amber-50">
-      <div className="w-full max-w-md">
+    <div className="min-h-screen flex items-center justify-center" style={{ backgroundColor: "var(--background)" }}>
+      <div className="w-full max-w-sm">
         <div className="text-center mb-8">
-          <h1 className="text-3xl font-bold text-amber-900">Second Brain</h1>
-          <p className="text-amber-700 mt-2">Создайте аккаунт</p>
+          <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>
+            Second Brain
+          </h1>
+          <p className="mt-1 text-sm uppercase tracking-widest" style={{ color: "var(--muted-foreground)", fontSize: "0.65rem" }}>
+            Образовательная платформа
+          </p>
         </div>
-        <div className="bg-white rounded-2xl shadow-sm border border-amber-100 p-8">
+        <div className="card-aubade p-8">
           <RegisterForm />
         </div>
       </div>

src/app/(auth)/register/register-form.tsx

@@ -1,12 +1,10 @@
 "use client";
 
 import { useState } from "react";
-import { useRouter } from "next/navigation";
 import Link from "next/link";
 import { signUp } from "@/lib/auth-client";
 
 export function RegisterForm() {
-  const router = useRouter();
   const [name, setName] = useState("");
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
@@ -14,6 +12,16 @@ export function RegisterForm() {
   const [loading, setLoading] = useState(false);
   const [success, setSuccess] = useState(false);
 
+  const inputStyle = {
+    border: "2px solid var(--border)",
+    background: "var(--background)",
+    outline: "none",
+    width: "100%",
+    padding: "0.5rem 0.75rem",
+    fontSize: "0.875rem",
+    fontFamily: "inherit",
+  } as React.CSSProperties;
+
   async function handleSubmit(e: React.FormEvent) {
     e.preventDefault();
     setError("");
@@ -35,14 +43,11 @@ export function RegisterForm() {
     return (
       <div className="text-center space-y-4">
         <div className="text-4xl">✉️</div>
-        <h2 className="text-xl font-semibold text-gray-800">
-          Проверьте почту
-        </h2>
-        <p className="text-gray-500">
-          Мы отправили письмо на <strong>{email}</strong> для подтверждения
-          аккаунта.
+        <p className="font-bold">Проверьте почту</p>
+        <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>
+          Мы отправили письмо на <strong>{email}</strong> для подтверждения аккаунта.
         </p>
-        <Link href="/login" className="text-amber-600 hover:underline text-sm">
+        <Link href="/login" className="text-sm underline" style={{ color: "var(--foreground)" }}>
           Вернуться к входу
         </Link>
       </div>
@@ -51,8 +56,8 @@ export function RegisterForm() {
 
   return (
     <form onSubmit={handleSubmit} className="space-y-4">
-      <div>
-        <label className="block text-sm font-medium text-gray-700 mb-1">
+      <div className="space-y-1">
+        <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
           Имя
         </label>
         <input
@@ -60,12 +65,14 @@ export function RegisterForm() {
           value={name}
           onChange={(e) => setName(e.target.value)}
           required
-          className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-amber-400"
+          style={inputStyle}
+          onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
           placeholder="Иван Иванов"
         />
       </div>
-      <div>
-        <label className="block text-sm font-medium text-gray-700 mb-1">
+      <div className="space-y-1">
+        <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
           Email
         </label>
         <input
@@ -73,12 +80,14 @@ export function RegisterForm() {
           value={email}
           onChange={(e) => setEmail(e.target.value)}
           required
-          className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-amber-400"
+          style={inputStyle}
+          onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
           placeholder="you@example.com"
         />
       </div>
-      <div>
-        <label className="block text-sm font-medium text-gray-700 mb-1">
+      <div className="space-y-1">
+        <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
           Пароль
         </label>
         <input
@@ -87,21 +96,28 @@ export function RegisterForm() {
           onChange={(e) => setPassword(e.target.value)}
           required
           minLength={8}
-          className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-amber-400"
+          style={inputStyle}
+          onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
           placeholder="Минимум 8 символов"
         />
       </div>
-      {error && <p className="text-red-500 text-sm">{error}</p>}
+      {error && (
+        <p className="text-xs py-2 px-3" style={{ border: "2px solid oklch(0.577 0.245 27.325)", color: "oklch(0.577 0.245 27.325)" }}>
+          {error}
+        </p>
+      )}
       <button
         type="submit"
         disabled={loading}
-        className="w-full bg-amber-500 hover:bg-amber-600 text-white font-medium py-2 px-4 rounded-lg transition-colors disabled:opacity-50"
+        className="btn-aubade btn-aubade-accent w-full py-2 text-sm"
+        style={{ opacity: loading ? 0.6 : 1 }}
       >
         {loading ? "Регистрация..." : "Зарегистрироваться"}
       </button>
-      <p className="text-center text-sm text-gray-500">
+      <p className="text-center text-xs" style={{ color: "var(--muted-foreground)" }}>
         Уже есть аккаунт?{" "}
-        <Link href="/login" className="text-amber-600 hover:underline">
+        <Link href="/login" className="underline" style={{ color: "var(--foreground)" }}>
           Войти
         </Link>
       </p>

src/app/(student)/courses/[slug]/layout.tsx

@@ -0,0 +1,69 @@
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { prisma } from "@/lib/prisma";
+import { notFound } from "next/navigation";
+import { CourseSidebar } from "@/components/student/course-sidebar";
+
+interface Props {
+  children: React.ReactNode;
+  params: Promise<{ slug: string }>;
+}
+
+export default async function CourseLayout({ children, params }: Props) {
+  const { slug } = await params;
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) redirect("/login");
+
+  const isAdmin = session.user.role === "admin";
+
+  const course = await prisma.course.findUnique({
+    where: { slug, ...(isAdmin ? {} : { published: true }) },
+    include: {
+      modules: {
+        orderBy: { order: "asc" },
+        include: {
+          lessons: {
+            where: { published: true },
+            orderBy: { order: "asc" },
+            select: { id: true, title: true },
+          },
+        },
+      },
+    },
+  });
+
+  if (!course) notFound();
+
+  if (!isAdmin) {
+    const enrollment = await prisma.courseEnrollment.findUnique({
+      where: { userId_courseId: { userId: session.user.id, courseId: course.id } },
+    });
+
+    if (!enrollment) redirect("/dashboard");
+
+    if (enrollment.expiresAt && enrollment.expiresAt < new Date()) {
+      redirect("/dashboard?expired=1");
+    }
+  }
+
+  // Fetch completed lesson IDs for this user
+  const allLessonIds = course.modules.flatMap((m) => m.lessons.map((l) => l.id));
+  const progressRecords = isAdmin
+    ? []
+    : await prisma.lessonProgress.findMany({
+        where: { userId: session.user.id, lessonId: { in: allLessonIds } },
+        select: { lessonId: true },
+      });
+
+  const completedLessonIds = new Set(progressRecords.map((p) => p.lessonId));
+
+  return (
+    <div className="flex flex-1">
+      <CourseSidebar course={course} completedLessonIds={completedLessonIds} />
+      <main className="flex-1 min-w-0 overflow-y-auto">
+        {children}
+      </main>
+    </div>
+  );
+}

src/app/(student)/courses/[slug]/lessons/[lessonId]/actions.ts

@@ -0,0 +1,29 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { auth } from "@/lib/auth";
+import { headers } from "next/headers";
+import { revalidatePath } from "next/cache";
+
+export async function toggleLessonProgress(lessonId: string, slug: string) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) throw new Error("Unauthorized");
+
+  const existing = await prisma.lessonProgress.findUnique({
+    where: { userId_lessonId: { userId: session.user.id, lessonId } },
+  });
+
+  if (existing) {
+    await prisma.lessonProgress.delete({
+      where: { userId_lessonId: { userId: session.user.id, lessonId } },
+    });
+  } else {
+    await prisma.lessonProgress.create({
+      data: { userId: session.user.id, lessonId },
+    });
+  }
+
+  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
+  revalidatePath(`/courses/${slug}`);
+  revalidatePath("/dashboard");
+}

src/app/(student)/courses/[slug]/lessons/[lessonId]/comment-actions.ts

@@ -0,0 +1,62 @@
+"use server";
+
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { revalidatePath } from "next/cache";
+
+export async function addComment(lessonId: string, slug: string, text: string) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) throw new Error("Unauthorized");
+
+  const trimmed = text.trim();
+  if (!trimmed || trimmed.length > 2000) throw new Error("Invalid text");
+
+  // Verify user has access to this lesson's course
+  const lesson = await prisma.lesson.findUnique({
+    where: { id: lessonId },
+    select: { module: { select: { course: { select: { id: true } } } } },
+  });
+  if (!lesson) throw new Error("Lesson not found");
+
+  const isAdmin = session.user.role === "admin";
+  if (!isAdmin) {
+    const enrollment = await prisma.courseEnrollment.findUnique({
+      where: {
+        userId_courseId: {
+          userId: session.user.id,
+          courseId: lesson.module.course.id,
+        },
+      },
+    });
+    if (!enrollment) throw new Error("Not enrolled");
+    if (enrollment.expiresAt && enrollment.expiresAt < new Date()) throw new Error("Access expired");
+  }
+
+  await prisma.lessonComment.create({
+    data: { lessonId, userId: session.user.id, text: trimmed },
+  });
+
+  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
+}
+
+export async function deleteComment(commentId: string, lessonId: string, slug: string) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) throw new Error("Unauthorized");
+
+  const comment = await prisma.lessonComment.findUnique({ where: { id: commentId } });
+  if (!comment) throw new Error("Not found");
+
+  const canDelete =
+    comment.userId === session.user.id ||
+    session.user.role === "curator" ||
+    session.user.role === "admin";
+  if (!canDelete) throw new Error("Forbidden");
+
+  await prisma.lessonComment.update({
+    where: { id: commentId },
+    data: { deleted: true },
+  });
+
+  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
+}

src/app/(student)/courses/[slug]/lessons/[lessonId]/homework-actions.ts

@@ -0,0 +1,69 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { auth } from "@/lib/auth";
+import { headers } from "next/headers";
+import { revalidatePath } from "next/cache";
+import { sendHomeworkSubmittedEmail } from "@/lib/email";
+
+interface HomeworkFile {
+  name: string;
+  url: string;
+  size: number;
+}
+
+export async function submitHomework(
+  homeworkId: string,
+  slug: string,
+  lessonId: string,
+  text: string,
+  files: HomeworkFile[]
+) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) throw new Error("Unauthorized");
+
+  const existing = await prisma.homeworkSubmission.findFirst({
+    where: { homeworkId, userId: session.user.id },
+    include: { feedbacks: true },
+  });
+
+  // Don't allow resubmission if feedback already given
+  if (existing?.feedbacks && existing.feedbacks.length > 0) {
+    throw new Error("Работа уже проверена");
+  }
+
+  let submissionId: string;
+  if (existing) {
+    const updated = await prisma.homeworkSubmission.update({
+      where: { id: existing.id },
+      data: { text, files: files as object[], submittedAt: new Date() },
+    });
+    submissionId = updated.id;
+  } else {
+    const created = await prisma.homeworkSubmission.create({
+      data: { homeworkId, userId: session.user.id, text, files: files as object[] },
+    });
+    submissionId = created.id;
+
+    // Notify admins/curators on first submission only
+    const [lesson, admins] = await Promise.all([
+      prisma.homework.findUnique({
+        where: { id: homeworkId },
+        include: { lesson: { select: { title: true } } },
+      }),
+      prisma.user.findMany({
+        where: { role: { in: ["admin", "curator"] } },
+        select: { email: true, name: true },
+      }),
+    ]);
+    if (lesson) {
+      await Promise.all(
+        admins.map((a) =>
+          sendHomeworkSubmittedEmail(a.email, a.name, session.user.name, lesson.lesson.title, submissionId)
+        )
+      );
+    }
+  }
+
+  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
+}

src/app/(student)/courses/[slug]/lessons/[lessonId]/page.tsx

@@ -0,0 +1,209 @@
+import { prisma } from "@/lib/prisma";
+import { notFound } from "next/navigation";
+import Link from "next/link";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { KinescopePlayer } from "@/components/player/kinescope-player";
+import { LessonContent } from "@/components/student/lesson-content";
+import { LessonCompleteButton } from "@/components/student/lesson-complete-button";
+import { HomeworkSection } from "@/components/student/homework-section";
+import { LessonComments } from "@/components/student/lesson-comments";
+
+interface Props {
+  params: Promise<{ slug: string; lessonId: string }>;
+}
+
+export default async function LessonPage({ params }: Props) {
+  const { slug, lessonId } = await params;
+
+  const session = await auth.api.getSession({ headers: await headers() });
+  const isAdmin = session?.user.role === "admin";
+
+  const [lesson, progress, comments] = await Promise.all([
+    prisma.lesson.findUnique({
+      where: { id: lessonId, ...(isAdmin ? {} : { published: true }) },
+      include: {
+        files: { orderBy: { createdAt: "asc" } },
+        homework: true,
+        module: {
+          include: {
+            course: {
+              include: {
+                modules: {
+                  orderBy: { order: "asc" },
+                  include: {
+                    lessons: {
+                      where: { published: true },
+                      orderBy: { order: "asc" },
+                      select: { id: true, title: true },
+                    },
+                  },
+                },
+              },
+            },
+          },
+        },
+      },
+    }),
+    session && !isAdmin
+      ? prisma.lessonProgress.findUnique({
+          where: { userId_lessonId: { userId: session.user.id, lessonId } },
+        })
+      : null,
+    prisma.lessonComment.findMany({
+      where: { lessonId },
+      orderBy: { createdAt: "asc" },
+      include: { user: { select: { id: true, name: true } } },
+    }),
+  ]);
+
+  // Fetch homework submission for this student
+  const homeworkSubmission = lesson?.homework && session && !isAdmin
+    ? await prisma.homeworkSubmission.findFirst({
+        where: { homeworkId: lesson.homework.id, userId: session.user.id },
+        include: { feedbacks: { include: { curator: { select: { name: true } } }, orderBy: { createdAt: "desc" } } },
+      })
+    : null;
+
+  if (!lesson || lesson.module.course.slug !== slug) notFound();
+
+  const isCompleted = !!progress;
+
+  // Build ordered flat list of all lessons for prev/next
+  const allLessons = lesson.module.course.modules.flatMap((m) => m.lessons);
+  const idx = allLessons.findIndex((l) => l.id === lessonId);
+  const prevLesson = idx > 0 ? allLessons[idx - 1] : null;
+  const nextLesson = idx < allLessons.length - 1 ? allLessons[idx + 1] : null;
+
+  const hasContent = lesson.content && Object.keys(lesson.content as object).length > 0;
+
+  function formatSize(bytes: number) {
+    if (bytes < 1024) return `${bytes} Б`;
+    if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} КБ`;
+    return `${(bytes / 1024 / 1024).toFixed(1)} МБ`;
+  }
+
+  return (
+    <article className="max-w-3xl mx-auto px-6 py-8">
+      {/* Title */}
+      <h1 className="text-2xl font-bold mb-6 leading-snug">{lesson.title}</h1>
+
+      {/* Video */}
+      {lesson.kinescopeId && (
+        <div className="mb-8">
+          <KinescopePlayer videoId={lesson.kinescopeId} />
+        </div>
+      )}
+
+      {/* Text content */}
+      {hasContent && (
+        <div className="mb-8">
+          <LessonContent content={lesson.content as object} />
+        </div>
+      )}
+
+      {/* Files */}
+      {lesson.files.length > 0 && (
+        <div className="mb-8">
+          <p className="text-xs font-bold uppercase tracking-widest mb-3" style={{ color: "var(--muted-foreground)" }}>
+            Материалы урока
+          </p>
+          <div className="space-y-2">
+            {lesson.files.map((file) => (
+              <a
+                key={file.id}
+                href={file.url}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="flex items-center gap-3 px-4 py-3 text-sm transition-colors"
+                style={{ border: "2px solid var(--border)", display: "flex" }}
+                onMouseEnter={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+                onMouseLeave={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+              >
+                <span className="text-lg">📎</span>
+                <span className="flex-1 font-medium">{file.name}</span>
+                <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                  {formatSize(file.size)}
+                </span>
+                <span className="text-xs underline" style={{ color: "var(--muted-foreground)" }}>
+                  Скачать
+                </span>
+              </a>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Homework */}
+      {lesson.homework && !isAdmin && (
+        <div className="mb-8">
+          <p className="text-xs font-bold uppercase tracking-widest mb-3" style={{ color: "var(--muted-foreground)" }}>
+            Домашнее задание
+          </p>
+          <HomeworkSection
+            homework={lesson.homework}
+            submission={homeworkSubmission ? {
+              ...homeworkSubmission,
+              files: (homeworkSubmission.files as { name: string; url: string; size: number }[]) ?? [],
+            } : null}
+            slug={slug}
+            lessonId={lessonId}
+          />
+        </div>
+      )}
+
+      {/* Complete button + Prev/Next navigation */}
+      <div
+        className="flex items-center justify-between pt-6 mt-6"
+        style={{ borderTop: "2px solid var(--border)" }}
+      >
+        {prevLesson ? (
+          <Link
+            href={`/courses/${slug}/lessons/${prevLesson.id}`}
+            className="btn-aubade text-sm max-w-[40%]"
+          >
+            ← {prevLesson.title}
+          </Link>
+        ) : (
+          <div />
+        )}
+
+        {!isAdmin && (
+          <LessonCompleteButton lessonId={lessonId} slug={slug} isCompleted={isCompleted} />
+        )}
+
+        {nextLesson ? (
+          <Link
+            href={`/courses/${slug}/lessons/${nextLesson.id}`}
+            className="btn-aubade btn-aubade-accent text-sm max-w-[40%] text-right"
+          >
+            {nextLesson.title} →
+          </Link>
+        ) : (
+          <div className="text-sm" style={{ color: "var(--muted-foreground)" }}>
+            {isAdmin ? "Последний урок курса" : ""}
+          </div>
+        )}
+      </div>
+
+      {/* Comments */}
+      {session && (
+        <div
+          className="mt-10 pt-8"
+          style={{ borderTop: "2px solid var(--border)" }}
+        >
+          <p className="text-xs font-bold uppercase tracking-widest mb-6" style={{ color: "var(--muted-foreground)" }}>
+            Обсуждение ({comments.filter((c) => !c.deleted).length})
+          </p>
+          <LessonComments
+            lessonId={lessonId}
+            slug={slug}
+            comments={comments}
+            currentUserId={session.user.id}
+            currentUserRole={session.user.role ?? "student"}
+          />
+        </div>
+      )}
+    </article>
+  );
+}

src/app/(student)/courses/[slug]/page.tsx

@@ -0,0 +1,48 @@
+import { prisma } from "@/lib/prisma";
+import { redirect } from "next/navigation";
+import { notFound } from "next/navigation";
+
+interface Props {
+  params: Promise<{ slug: string }>;
+}
+
+export default async function CoursePage({ params }: Props) {
+  const { slug } = await params;
+
+  const course = await prisma.course.findUnique({
+    where: { slug, published: true },
+    include: {
+      modules: {
+        orderBy: { order: "asc" },
+        include: {
+          lessons: {
+            where: { published: true },
+            orderBy: { order: "asc" },
+            select: { id: true },
+            take: 1,
+          },
+        },
+      },
+    },
+  });
+
+  if (!course) notFound();
+
+  // Redirect to the first published lesson
+  for (const mod of course.modules) {
+    if (mod.lessons.length > 0) {
+      redirect(`/courses/${slug}/lessons/${mod.lessons[0].id}`);
+    }
+  }
+
+  // No lessons yet — show placeholder
+  return (
+    <div className="p-10 text-center">
+      <p className="text-4xl mb-4">📭</p>
+      <p className="font-bold text-lg">Уроков пока нет</p>
+      <p className="text-sm mt-1" style={{ color: "var(--muted-foreground)" }}>
+        Курс в разработке. Загляните позже.
+      </p>
+    </div>
+  );
+}

src/app/(student)/dashboard/page.tsx

@@ -1,33 +1,153 @@
 import { headers } from "next/headers";
 import { auth } from "@/lib/auth";
 import { redirect } from "next/navigation";
-import { LogoutButton } from "@/components/layout/logout-button";
+import { prisma } from "@/lib/prisma";
+import Link from "next/link";
 
 export default async function StudentDashboard() {
   const session = await auth.api.getSession({ headers: await headers() });
-
   if (!session) redirect("/login");
 
+  const enrollments = await prisma.courseEnrollment.findMany({
+    where: { userId: session.user.id },
+    include: {
+      course: {
+        include: {
+          modules: {
+            include: {
+              lessons: {
+                where: { published: true },
+                select: { id: true },
+              },
+            },
+          },
+          _count: { select: { modules: true } },
+        },
+      },
+    },
+    orderBy: { enrolledAt: "desc" },
+  });
+
+  const now = new Date();
+  const active = enrollments.filter((e) => !e.expiresAt || e.expiresAt > now);
+  const expired = enrollments.filter((e) => e.expiresAt && e.expiresAt <= now);
+
+  // Fetch progress for all lessons in active courses
+  const allLessonIds = active.flatMap((e) =>
+    e.course.modules.flatMap((m) => m.lessons.map((l) => l.id))
+  );
+  const progressRecords = allLessonIds.length > 0
+    ? await prisma.lessonProgress.findMany({
+        where: { userId: session.user.id, lessonId: { in: allLessonIds } },
+        select: { lessonId: true },
+      })
+    : [];
+  const completedSet = new Set(progressRecords.map((p) => p.lessonId));
+
   return (
-    <div className="min-h-screen bg-amber-50">
-      <header className="bg-white border-b border-amber-100 px-6 py-4 flex items-center justify-between">
-        <h1 className="text-xl font-bold text-amber-900">Second Brain</h1>
-        <div className="flex items-center gap-4">
-          <span className="text-sm text-gray-600">{session.user.name}</span>
-          <LogoutButton />
-        </div>
-      </header>
-      <main className="max-w-4xl mx-auto px-6 py-10">
-        <h2 className="text-2xl font-semibold text-gray-800 mb-2">
-          Добро пожаловать, {session.user.name}!
-        </h2>
-        <p className="text-gray-500 mb-8">Ваши курсы появятся здесь.</p>
-        <div className="bg-white rounded-2xl border border-amber-100 p-8 text-center text-gray-400">
+    <main className="max-w-4xl mx-auto px-6 py-10 w-full">
+      <h1 className="text-2xl font-bold mb-1">Мои курсы</h1>
+      <p className="text-sm mb-8" style={{ color: "var(--muted-foreground)" }}>
+        {active.length} активных курсов
+      </p>
+
+      {active.length === 0 ? (
+        <div className="card-aubade p-12 text-center">
           <p className="text-4xl mb-3">📚</p>
-          <p>Доступных курсов пока нет.</p>
-          <p className="text-sm mt-1">Обратитесь к администратору за доступом.</p>
+          <p className="font-medium">Доступных курсов пока нет</p>
+          <p className="text-sm mt-1" style={{ color: "var(--muted-foreground)" }}>
+            Обратитесь к администратору за доступом
+          </p>
         </div>
+      ) : (
+        <div className="grid gap-4 sm:grid-cols-2">
+          {active.map(({ course, expiresAt }) => {
+            const totalLessons = course.modules.reduce((s, m) => s + m.lessons.length, 0);
+            const completedLessons = course.modules
+              .flatMap((m) => m.lessons)
+              .filter((l) => completedSet.has(l.id)).length;
+            const progressPct = totalLessons > 0
+              ? Math.round((completedLessons / totalLessons) * 100)
+              : 0;
+
+            return (
+              <Link
+                key={course.id}
+                href={`/courses/${course.slug}`}
+                className="card-aubade p-0 overflow-hidden flex flex-col"
+              >
+                {course.coverImage ? (
+                  // eslint-disable-next-line @next/next/no-img-element
+                  <img src={course.coverImage} alt={course.title} className="w-full aspect-video object-cover" />
+                ) : (
+                  <div className="w-full aspect-video flex items-center justify-center text-4xl" style={{ backgroundColor: "var(--color-surface)" }}>
+                    📚
+                  </div>
+                )}
+                <div className="p-4 flex-1 flex flex-col gap-2">
+                  <h2 className="font-bold text-base leading-tight">{course.title}</h2>
+                  {course.description && (
+                    <p className="text-xs line-clamp-2" style={{ color: "var(--muted-foreground)" }}>
+                      {course.description}
+                    </p>
+                  )}
+
+                  {/* Progress bar */}
+                  {totalLessons > 0 && (
+                    <div className="mt-auto">
+                      <div className="flex items-center justify-between mb-1">
+                        <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                          {completedLessons} из {totalLessons} уроков
+                        </span>
+                        <span
+                          className="text-xs font-bold"
+                          style={{ color: progressPct === 100 ? "var(--foreground)" : "var(--muted-foreground)" }}
+                        >
+                          {progressPct === 100 ? "✓ Завершён" : `${progressPct}%`}
+                        </span>
+                      </div>
+                      <div className="h-1.5 w-full" style={{ background: "var(--border)" }}>
+                        <div
+                          className="h-full transition-all"
+                          style={{
+                            width: `${progressPct}%`,
+                            background: progressPct === 100 ? "var(--foreground)" : "var(--accent)",
+                            border: progressPct > 0 ? "1px solid var(--foreground)" : "none",
+                          }}
+                        />
+                      </div>
+                    </div>
+                  )}
+
+                  {expiresAt && (
+                    <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                      Доступ до {new Date(expiresAt).toLocaleDateString("ru-RU")}
+                    </p>
+                  )}
+                </div>
+              </Link>
+            );
+          })}
+        </div>
+      )}
+
+      {expired.length > 0 && (
+        <div className="mt-10">
+          <p className="text-xs font-bold uppercase tracking-widest mb-3" style={{ color: "var(--muted-foreground)" }}>
+            Доступ истёк
+          </p>
+          <div className="space-y-2">
+            {expired.map(({ course, expiresAt }) => (
+              <div key={course.id} className="flex items-center justify-between px-4 py-3 opacity-50" style={{ border: "2px solid var(--border)" }}>
+                <span className="text-sm font-medium">{course.title}</span>
+                <span className="text-xs" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+                  Истёк {new Date(expiresAt!).toLocaleDateString("ru-RU")}
+                </span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
     </main>
-    </div>
   );
 }

src/app/(student)/layout.tsx

@@ -0,0 +1,35 @@
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import Link from "next/link";
+import { LogoutButton } from "@/components/layout/logout-button";
+import { getSetting } from "@/lib/settings";
+
+export default async function StudentLayout({ children }: { children: React.ReactNode }) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) redirect("/login");
+
+  // Maintenance mode: non-admin users see the maintenance page
+  if (session.user.role !== "admin") {
+    const maintenance = await getSetting("maintenanceMode");
+    if (maintenance === "true") redirect("/maintenance");
+  }
+
+  return (
+    <div className="min-h-screen flex flex-col" style={{ backgroundColor: "var(--background)" }}>
+      <header
+        className="sticky top-0 z-10 flex items-center justify-between px-6 py-3"
+        style={{ borderBottom: "2px solid var(--border)", backgroundColor: "var(--background)" }}
+      >
+        <Link href="/dashboard" className="font-bold tracking-wide" style={{ color: "var(--foreground)" }}>
+          Second Brain
+        </Link>
+        <div className="flex items-center gap-4">
+          <span className="text-sm" style={{ color: "var(--muted-foreground)" }}>{session.user.name}</span>
+          <LogoutButton />
+        </div>
+      </header>
+      <div className="flex-1 flex flex-col">{children}</div>
+    </div>
+  );
+}

src/app/admin/categories/actions.ts

@@ -0,0 +1,48 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+}
+
+function slugify(str: string) {
+  const map: Record<string, string> = {
+    а:"a",б:"b",в:"v",г:"g",д:"d",е:"e",ё:"yo",ж:"zh",з:"z",и:"i",й:"y",
+    к:"k",л:"l",м:"m",н:"n",о:"o",п:"p",р:"r",с:"s",т:"t",у:"u",ф:"f",
+    х:"kh",ц:"ts",ч:"ch",ш:"sh",щ:"shch",ъ:"",ы:"y",ь:"",э:"e",ю:"yu",я:"ya",
+  };
+  return str.toLowerCase()
+    .replace(/[а-яё]/g, (c) => map[c] ?? c)
+    .replace(/[^a-z0-9]+/g, "-")
+    .replace(/^-|-$/g, "");
+}
+
+export async function createCategory(formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const slug = (formData.get("slug") as string).trim() || slugify(title);
+  const count = await prisma.category.count();
+  await prisma.category.create({ data: { title, slug, order: count } });
+  revalidatePath("/admin/categories");
+}
+
+export async function updateCategory(id: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const slug = formData.get("slug") as string;
+  await prisma.category.update({ where: { id }, data: { title, slug } });
+  revalidatePath("/admin/categories");
+}
+
+export async function deleteCategory(id: string) {
+  await requireAdmin();
+  await prisma.category.delete({ where: { id } });
+  revalidatePath("/admin/categories");
+  revalidatePath("/admin/courses");
+}

src/app/admin/categories/page.tsx

@@ -0,0 +1,60 @@
+import { prisma } from "@/lib/prisma";
+import { CategoryRow } from "@/components/admin/category-row";
+import { createCategory } from "./actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+
+export default async function CategoriesPage() {
+  const categories = await prisma.category.findMany({
+    orderBy: { order: "asc" },
+    include: { _count: { select: { courses: true } } },
+  });
+
+  return (
+    <div className="p-8 max-w-2xl">
+      <div className="mb-6">
+        <h1 className="text-2xl font-bold" style={{ color: "var(--foreground)" }}>Категории</h1>
+        <p className="text-sm mt-0.5" style={{ color: "var(--muted-foreground)" }}>
+          {categories.length} категорий
+        </p>
+      </div>
+
+      <div className="space-y-2 mb-8">
+        {categories.length === 0 ? (
+          <p className="text-sm py-4" style={{ color: "var(--muted-foreground)" }}>
+            Категорий пока нет. Создайте первую.
+          </p>
+        ) : (
+          categories.map((cat) => (
+            <CategoryRow key={cat.id} category={cat} courseCount={cat._count.courses} />
+          ))
+        )}
+      </div>
+
+      <div className="card-aubade p-5">
+        <p className="text-xs font-bold uppercase tracking-widest mb-4" style={{ color: "var(--muted-foreground)" }}>
+          Новая категория
+        </p>
+        <form action={createCategory} className="flex flex-col gap-3">
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="text-xs uppercase tracking-widest font-bold block mb-1.5" style={{ color: "var(--muted-foreground)" }}>
+                Название
+              </label>
+              <Input name="title" placeholder="Obsidian PKM" required />
+            </div>
+            <div>
+              <label className="text-xs uppercase tracking-widest font-bold block mb-1.5" style={{ color: "var(--muted-foreground)" }}>
+                Slug
+              </label>
+              <Input name="slug" placeholder="obsidian-pkm (авто)" />
+            </div>
+          </div>
+          <div className="flex justify-end">
+            <Button type="submit">+ Создать</Button>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}

src/app/admin/comments/actions.ts

@@ -0,0 +1,18 @@
+"use server";
+
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { revalidatePath } from "next/cache";
+
+export async function adminDeleteComment(commentId: string) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Нет доступа");
+
+  await prisma.lessonComment.update({
+    where: { id: commentId },
+    data: { deleted: true },
+  });
+
+  revalidatePath("/admin/comments");
+}

src/app/admin/comments/page.tsx

@@ -0,0 +1,114 @@
+import { prisma } from "@/lib/prisma";
+import Link from "next/link";
+import { Suspense } from "react";
+import { CommentsTable } from "@/components/admin/comments-table";
+
+export const metadata = { title: "Комментарии" };
+
+const PAGE_SIZE = 30;
+
+interface Props {
+  searchParams: Promise<{ page?: string; search?: string }>;
+}
+
+export default async function AdminCommentsPage({ searchParams }: Props) {
+  const { page = "1", search = "" } = await searchParams;
+  const currentPage = Math.max(1, parseInt(page) || 1);
+  const skip = (currentPage - 1) * PAGE_SIZE;
+
+  const where = {
+    deleted: false,
+    ...(search
+      ? {
+          OR: [
+            { user: { name: { contains: search, mode: "insensitive" as const } } },
+            { user: { email: { contains: search, mode: "insensitive" as const } } },
+            { text: { contains: search, mode: "insensitive" as const } },
+          ],
+        }
+      : {}),
+  };
+
+  const [comments, total] = await Promise.all([
+    prisma.lessonComment.findMany({
+      where,
+      orderBy: { createdAt: "desc" },
+      skip,
+      take: PAGE_SIZE,
+      include: {
+        user: { select: { id: true, name: true, email: true } },
+        lesson: {
+          select: {
+            id: true,
+            title: true,
+            module: {
+              select: {
+                course: { select: { slug: true, title: true } },
+              },
+            },
+          },
+        },
+      },
+    }),
+    prisma.lessonComment.count({ where }),
+  ]);
+
+  const totalPages = Math.ceil(total / PAGE_SIZE);
+
+  function pageUrl(p: number) {
+    const params = new URLSearchParams();
+    if (search) params.set("search", search);
+    params.set("page", String(p));
+    return `/admin/comments?${params.toString()}`;
+  }
+
+  return (
+    <div className="p-8">
+      <div className="mb-6">
+        <h1
+          className="text-xs font-bold uppercase tracking-widest"
+          style={{ color: "var(--muted-foreground)" }}
+        >
+          Комментарии
+        </h1>
+        <p className="text-sm mt-1" style={{ color: "var(--muted-foreground)" }}>
+          {total} активных комментариев
+        </p>
+      </div>
+
+      <Suspense>
+        <CommentsTable comments={comments} search={search} />
+      </Suspense>
+
+      {/* Pagination */}
+      {totalPages > 1 && (
+        <div className="flex items-center gap-1 mt-4">
+          {currentPage > 1 && (
+            <Link href={pageUrl(currentPage - 1)} className="btn-aubade px-3 py-1 text-xs">←</Link>
+          )}
+          {Array.from({ length: totalPages }, (_, i) => i + 1)
+            .filter((p) => p === 1 || p === totalPages || Math.abs(p - currentPage) <= 2)
+            .reduce<(number | "…")[]>((acc, p, i, arr) => {
+              if (i > 0 && (p as number) - (arr[i - 1] as number) > 1) acc.push("…");
+              acc.push(p);
+              return acc;
+            }, [])
+            .map((p, i) =>
+              p === "…" ? (
+                <span key={`e${i}`} className="px-2 text-xs" style={{ color: "var(--muted-foreground)" }}>…</span>
+              ) : (
+                <Link key={p} href={pageUrl(p as number)} className="px-3 py-1 text-xs"
+                  style={{ border: "2px solid var(--border)", background: p === currentPage ? "var(--foreground)" : "transparent", color: p === currentPage ? "var(--background)" : "var(--foreground)" }}>
+                  {p}
+                </Link>
+              )
+            )}
+          {currentPage < totalPages && (
+            <Link href={pageUrl(currentPage + 1)} className="btn-aubade px-3 py-1 text-xs">→</Link>
+          )}
+          <span className="ml-2 text-xs" style={{ color: "var(--muted-foreground)" }}>стр. {currentPage} из {totalPages}</span>
+        </div>
+      )}
+    </div>
+  );
+}

src/app/admin/courses/[courseId]/actions.ts

@@ -0,0 +1,104 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
+import { sendCourseAccessEmail } from "@/lib/email";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+  return session;
+}
+
+// ── Modules ──────────────────────────────────────────────────────────────────
+
+export async function createModule(courseId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const count = await prisma.module.count({ where: { courseId } });
+  const mod = await prisma.module.create({ data: { courseId, title, order: count } });
+  revalidatePath(`/admin/courses/${courseId}`);
+  redirect(`/admin/courses/${courseId}/modules/${mod.id}`);
+}
+
+export async function updateModule(moduleId: string, courseId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const description = (formData.get("description") as string | null)?.trim() || null;
+  await prisma.module.update({ where: { id: moduleId }, data: { title, description } });
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function deleteModule(moduleId: string, courseId: string) {
+  await requireAdmin();
+  await prisma.module.delete({ where: { id: moduleId } });
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function reorderModules(courseId: string, orderedIds: string[]) {
+  await requireAdmin();
+  await Promise.all(
+    orderedIds.map((id, index) =>
+      prisma.module.update({ where: { id }, data: { order: index } })
+    )
+  );
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+// ── Enrollment ───────────────────────────────────────────────────────────────
+
+export async function grantAccess(
+  courseId: string,
+  userId: string,
+  expiresAt?: string | null,
+  note?: string
+) {
+  const session = await requireAdmin();
+  await prisma.courseEnrollment.upsert({
+    where: { userId_courseId: { userId, courseId } },
+    update: { expiresAt: expiresAt ? new Date(expiresAt) : null },
+    create: { userId, courseId, expiresAt: expiresAt ? new Date(expiresAt) : null },
+  });
+  await prisma.accessLog.create({
+    data: {
+      courseId,
+      userId,
+      action: "granted",
+      method: "manual",
+      grantedById: session.user.id,
+      note: note || null,
+    },
+  });
+
+  // Send email notification
+  const [user, course] = await Promise.all([
+    prisma.user.findUnique({ where: { id: userId }, select: { email: true, name: true } }),
+    prisma.course.findUnique({ where: { id: courseId }, select: { title: true } }),
+  ]);
+  if (user && course) {
+    await sendCourseAccessEmail(user.email, user.name, course.title);
+  }
+
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function revokeAccess(courseId: string, userId: string, note?: string) {
+  const session = await requireAdmin();
+  await prisma.courseEnrollment.delete({
+    where: { userId_courseId: { userId, courseId } },
+  });
+  await prisma.accessLog.create({
+    data: {
+      courseId,
+      userId,
+      action: "revoked",
+      method: "manual",
+      grantedById: session.user.id,
+      note: note || null,
+    },
+  });
+  revalidatePath(`/admin/courses/${courseId}`);
+}

src/app/admin/courses/[courseId]/modules/[moduleId]/actions.ts

@@ -0,0 +1,90 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+}
+
+export async function createLesson(moduleId: string, courseId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const kinescopeId = (formData.get("kinescopeId") as string | null)?.trim() || null;
+  const count = await prisma.lesson.count({ where: { moduleId } });
+  const lesson = await prisma.lesson.create({
+    data: { moduleId, title, kinescopeId, order: count },
+  });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+  redirect(`/admin/courses/${courseId}/modules/${moduleId}/lessons/${lesson.id}`);
+}
+
+export async function updateLesson(lessonId: string, courseId: string, moduleId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  await prisma.lesson.update({ where: { id: lessonId }, data: { title } });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+}
+
+export async function deleteLesson(lessonId: string, courseId: string, moduleId: string) {
+  await requireAdmin();
+  await prisma.lesson.delete({ where: { id: lessonId } });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+}
+
+export async function reorderLessons(moduleId: string, courseId: string, orderedIds: string[]) {
+  await requireAdmin();
+  await Promise.all(
+    orderedIds.map((id, index) =>
+      prisma.lesson.update({ where: { id }, data: { order: index } })
+    )
+  );
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+}
+
+export async function toggleLessonPublished(
+  lessonId: string,
+  courseId: string,
+  moduleId: string,
+  currentValue: boolean
+) {
+  await requireAdmin();
+  await prisma.lesson.update({
+    where: { id: lessonId },
+    data: { published: !currentValue },
+  });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function moveLessonToModule(
+  lessonId: string,
+  targetModuleId: string,
+  courseId: string,
+  sourceModuleId: string
+) {
+  await requireAdmin();
+  // verify target module belongs to same course
+  const target = await prisma.module.findFirst({
+    where: { id: targetModuleId, courseId },
+  });
+  if (!target) throw new Error("Module not found");
+
+  const maxOrder = await prisma.lesson.aggregate({
+    where: { moduleId: targetModuleId },
+    _max: { order: true },
+  });
+
+  await prisma.lesson.update({
+    where: { id: lessonId },
+    data: { moduleId: targetModuleId, order: (maxOrder._max.order ?? -1) + 1 },
+  });
+
+  revalidatePath(`/admin/courses/${courseId}/modules/${sourceModuleId}`);
+  revalidatePath(`/admin/courses/${courseId}/modules/${targetModuleId}`);
+  revalidatePath(`/admin/courses/${courseId}`);
+}

src/app/admin/courses/[courseId]/modules/[moduleId]/lessons/[lessonId]/actions.ts

@@ -0,0 +1,36 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { revalidatePath } from "next/cache";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+}
+
+export async function saveLesson(
+  lessonId: string,
+  courseId: string,
+  moduleId: string,
+  data: {
+    title: string;
+    kinescopeId: string;
+    content: object;
+    published: boolean;
+  }
+) {
+  await requireAdmin();
+  await prisma.lesson.update({
+    where: { id: lessonId },
+    data: {
+      title: data.title,
+      kinescopeId: data.kinescopeId || null,
+      content: data.content,
+      published: data.published,
+    },
+  });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}/lessons/${lessonId}`);
+}

src/app/admin/courses/[courseId]/modules/[moduleId]/lessons/[lessonId]/homework-actions.ts

@@ -0,0 +1,27 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { auth } from "@/lib/auth";
+import { headers } from "next/headers";
+import { revalidatePath } from "next/cache";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+}
+
+export async function saveHomework(lessonId: string, description: string) {
+  await requireAdmin();
+  await prisma.homework.upsert({
+    where: { lessonId },
+    update: { description },
+    create: { lessonId, description },
+  });
+  revalidatePath(`/admin/courses`);
+}
+
+export async function deleteHomework(lessonId: string) {
+  await requireAdmin();
+  await prisma.homework.delete({ where: { lessonId } });
+  revalidatePath(`/admin/courses`);
+}

src/app/admin/courses/[courseId]/modules/[moduleId]/lessons/[lessonId]/page.tsx

@@ -0,0 +1,86 @@
+import { prisma } from "@/lib/prisma";
+import { notFound } from "next/navigation";
+import Link from "next/link";
+import { LessonEditor } from "@/components/admin/lesson-editor";
+import { LessonFilesManager } from "@/components/admin/lesson-files-manager";
+import { HomeworkEditor } from "@/components/admin/homework-editor";
+
+interface Props {
+  params: Promise<{ courseId: string; moduleId: string; lessonId: string }>;
+}
+
+export default async function LessonEditorPage({ params }: Props) {
+  const { courseId, moduleId, lessonId } = await params;
+
+  const [lesson, siblings] = await Promise.all([
+    prisma.lesson.findUnique({
+      where: { id: lessonId },
+      include: {
+        files: { orderBy: { createdAt: "asc" } },
+        homework: true,
+        module: {
+          include: { course: { select: { title: true, slug: true } } },
+        },
+      },
+    }),
+    prisma.lesson.findMany({
+      where: { moduleId },
+      orderBy: { order: "asc" },
+      select: { id: true, title: true },
+    }),
+  ]);
+
+  if (!lesson || lesson.moduleId !== moduleId) notFound();
+
+  const idx = siblings.findIndex((l) => l.id === lessonId);
+  const prevLesson = idx > 0 ? siblings[idx - 1] : null;
+  const nextLesson = idx < siblings.length - 1 ? siblings[idx + 1] : null;
+
+  return (
+    <div className="p-8 max-w-4xl">
+      <nav className="text-xs mb-6 uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+        <Link href="/admin/courses" className="hover:underline">Курсы</Link>
+        <span className="mx-2">/</span>
+        <Link href={`/admin/courses/${courseId}`} className="hover:underline">{lesson.module.course.title}</Link>
+        <span className="mx-2">/</span>
+        <Link href={`/admin/courses/${courseId}/modules/${moduleId}`} className="hover:underline">{lesson.module.title}</Link>
+        <span className="mx-2">/</span>
+        <span style={{ color: "var(--foreground)" }}>{lesson.title}</span>
+      </nav>
+
+      {/* Lesson editor */}
+      <div className="card-aubade p-6 mb-6">
+        <LessonEditor
+          lesson={{
+            id: lesson.id,
+            title: lesson.title,
+            kinescopeId: lesson.kinescopeId ?? "",
+            content: (lesson.content as object) ?? {},
+            published: lesson.published,
+          }}
+          courseId={courseId}
+          moduleId={moduleId}
+          courseSlug={lesson.module.course.slug}
+          prevLesson={prevLesson}
+          nextLesson={nextLesson}
+        />
+      </div>
+
+      {/* Files section */}
+      <div className="card-aubade p-6 mb-6">
+        <p className="text-xs font-bold uppercase tracking-widest mb-4" style={{ color: "var(--muted-foreground)" }}>
+          Файлы и материалы
+        </p>
+        <LessonFilesManager lessonId={lessonId} initialFiles={lesson.files} />
+      </div>
+
+      {/* Homework section */}
+      <div className="card-aubade p-6">
+        <p className="text-xs font-bold uppercase tracking-widest mb-4" style={{ color: "var(--muted-foreground)" }}>
+          Домашнее задание
+        </p>
+        <HomeworkEditor lessonId={lessonId} initial={lesson.homework} />
+      </div>
+    </div>
+  );
+}

src/app/admin/courses/[courseId]/modules/[moduleId]/page.tsx

@@ -0,0 +1,60 @@
+import { prisma } from "@/lib/prisma";
+import { notFound } from "next/navigation";
+import Link from "next/link";
+import { SortableLessons } from "@/components/admin/sortable-lessons";
+
+interface Props {
+  params: Promise<{ courseId: string; moduleId: string }>;
+}
+
+export default async function ModulePage({ params }: Props) {
+  const { courseId, moduleId } = await params;
+
+  const [module, allModules] = await Promise.all([
+    prisma.module.findUnique({
+      where: { id: moduleId },
+      include: {
+        course: { select: { title: true } },
+        lessons: { orderBy: { order: "asc" } },
+      },
+    }),
+    prisma.module.findMany({
+      where: { courseId, NOT: { id: moduleId } },
+      select: { id: true, title: true },
+      orderBy: { order: "asc" },
+    }),
+  ]);
+
+  if (!module || module.courseId !== courseId) notFound();
+
+  return (
+    <div className="p-8 max-w-3xl">
+      <nav className="text-xs mb-6 uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+        <Link href="/admin/courses" className="hover:underline">Курсы</Link>
+        <span className="mx-2">/</span>
+        <Link href={`/admin/courses/${courseId}`} className="hover:underline">{module.course.title}</Link>
+        <span className="mx-2">/</span>
+        <span style={{ color: "var(--foreground)" }}>{module.title}</span>
+      </nav>
+
+      <div className="mb-6">
+        <h1 className="text-2xl font-bold">{module.title}</h1>
+        <p className="text-sm mt-1" style={{ color: "var(--muted-foreground)" }}>
+          {module.lessons.length} {module.lessons.length === 1 ? "урок" : module.lessons.length < 5 ? "урока" : "уроков"}
+        </p>
+      </div>
+
+      <section className="card-aubade p-6">
+        <p className="text-xs font-bold uppercase tracking-widest mb-5" style={{ color: "var(--muted-foreground)" }}>
+          Уроки модуля
+        </p>
+        <SortableLessons
+          courseId={courseId}
+          moduleId={moduleId}
+          lessons={module.lessons}
+          otherModules={allModules}
+        />
+      </section>
+    </div>
+  );
+}

src/app/admin/courses/[courseId]/page.tsx

@@ -0,0 +1,107 @@
+import { prisma } from "@/lib/prisma";
+import { notFound } from "next/navigation";
+import Link from "next/link";
+import { CourseEditForm } from "@/components/admin/course-edit-form";
+import { SortableModules } from "@/components/admin/sortable-modules";
+import { EnrollmentManager } from "@/components/admin/enrollment-manager";
+import { CourseTree } from "@/components/admin/course-tree";
+
+interface Props {
+  params: Promise<{ courseId: string }>;
+}
+
+export default async function CourseDetailPage({ params }: Props) {
+  const { courseId } = await params;
+
+  const [course, allStudents, categories] = await Promise.all([
+    prisma.course.findUnique({
+      where: { id: courseId },
+      include: {
+        modules: {
+          orderBy: { order: "asc" },
+          include: {
+            _count: { select: { lessons: true } },
+            lessons: {
+              orderBy: { order: "asc" },
+              select: { id: true, title: true, published: true, kinescopeId: true },
+            },
+          },
+        },
+        enrollments: {
+          select: { userId: true, expiresAt: true },
+        },
+        accessLogs: {
+          orderBy: { createdAt: "desc" },
+          take: 50,
+          include: {
+            user: { select: { name: true } },
+            grantedBy: { select: { name: true } },
+          },
+        },
+      },
+    }),
+    prisma.user.findMany({
+      where: { role: "student" },
+      select: { id: true, name: true, email: true },
+      orderBy: { name: "asc" },
+    }),
+    prisma.category.findMany({ orderBy: { order: "asc" } }),
+  ]);
+
+  if (!course) notFound();
+
+  return (
+    <div className="p-8 max-w-4xl">
+      {/* Breadcrumb */}
+      <nav className="text-xs mb-6 uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+        <Link href="/admin/courses" className="hover:underline">Курсы</Link>
+        <span className="mx-2">/</span>
+        <span style={{ color: "var(--foreground)" }}>{course.title}</span>
+      </nav>
+
+      {/* Course metadata */}
+      <section className="card-aubade p-6 mb-6">
+        <p className="text-xs font-bold uppercase tracking-widest mb-5" style={{ color: "var(--muted-foreground)" }}>
+          Основная информация
+        </p>
+        <CourseEditForm course={course} categories={categories} />
+      </section>
+
+      {/* Modules */}
+      <section className="card-aubade p-6 mb-6">
+        <div className="flex items-center justify-between mb-5">
+          <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+            Модули
+          </p>
+          <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+            {course.modules.length} модулей
+          </span>
+        </div>
+        <SortableModules courseId={courseId} modules={course.modules} />
+      </section>
+
+      {/* Course tree overview */}
+      {course.modules.length > 0 && (
+        <section className="card-aubade p-6 mb-6">
+          <p className="text-xs font-bold uppercase tracking-widest mb-5" style={{ color: "var(--muted-foreground)" }}>
+            Структура курса
+          </p>
+          <CourseTree courseId={courseId} modules={course.modules} />
+        </section>
+      )}
+
+      {/* Access management */}
+      <section className="card-aubade p-6">
+        <p className="text-xs font-bold uppercase tracking-widest mb-5" style={{ color: "var(--muted-foreground)" }}>
+          Управление доступом
+        </p>
+        <EnrollmentManager
+          courseId={courseId}
+          allStudents={allStudents}
+          enrollments={course.enrollments}
+          accessLogs={course.accessLogs}
+        />
+      </section>
+    </div>
+  );
+}

src/app/admin/courses/actions.ts

@@ -0,0 +1,63 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { revalidatePath } from "next/cache";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+}
+
+function slugify(str: string): string {
+  const map: Record<string, string> = {
+    а:"a",б:"b",в:"v",г:"g",д:"d",е:"e",ё:"yo",ж:"zh",з:"z",и:"i",й:"y",
+    к:"k",л:"l",м:"m",н:"n",о:"o",п:"p",р:"r",с:"s",т:"t",у:"u",ф:"f",
+    х:"kh",ц:"ts",ч:"ch",ш:"sh",щ:"shch",ъ:"",ы:"y",ь:"",э:"e",ю:"yu",я:"ya",
+  };
+  return str.toLowerCase()
+    .replace(/[а-яё]/g, (c) => map[c] ?? c)
+    .replace(/[^a-z0-9]+/g, "-")
+    .replace(/^-|-$/g, "");
+}
+
+export async function createCourse(formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const slug = (formData.get("slug") as string).trim() || slugify(title);
+  const description = (formData.get("description") as string) || null;
+
+  const course = await prisma.course.create({
+    data: { title, slug, description },
+  });
+
+  revalidatePath("/admin/courses");
+  redirect(`/admin/courses/${course.id}`);
+}
+
+export async function updateCourse(courseId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const slug = formData.get("slug") as string;
+  const description = (formData.get("description") as string) || null;
+  const published = formData.get("published") === "true";
+  const coverImage = (formData.get("coverImage") as string) || null;
+  const categoryId = (formData.get("categoryId") as string) || null;
+
+  await prisma.course.update({
+    where: { id: courseId },
+    data: { title, slug, description, published, coverImage, categoryId },
+  });
+
+  revalidatePath("/admin/courses");
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function deleteCourse(courseId: string) {
+  await requireAdmin();
+  await prisma.course.delete({ where: { id: courseId } });
+  revalidatePath("/admin/courses");
+  redirect("/admin/courses");
+}

src/app/admin/courses/page.tsx

@@ -0,0 +1,56 @@
+import { prisma } from "@/lib/prisma";
+import Link from "next/link";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import { CreateCourseDialog } from "@/components/admin/create-course-dialog";
+
+export default async function CoursesPage() {
+  const courses = await prisma.course.findMany({
+    orderBy: { order: "asc" },
+    include: { _count: { select: { modules: true, enrollments: true } } },
+  });
+
+  return (
+    <div className="p-8">
+      <div className="flex items-center justify-between mb-6">
+        <div>
+          <h1 className="text-2xl font-semibold text-slate-800">Курсы</h1>
+          <p className="text-slate-500 text-sm mt-0.5">{courses.length} курсов</p>
+        </div>
+        <CreateCourseDialog />
+      </div>
+
+      {courses.length === 0 ? (
+        <div className="bg-white border border-slate-200 rounded-2xl p-12 text-center">
+          <p className="text-4xl mb-3">📚</p>
+          <p className="text-slate-600 font-medium">Курсов пока нет</p>
+          <p className="text-slate-400 text-sm mt-1">Создайте первый курс</p>
+        </div>
+      ) : (
+        <div className="space-y-2">
+          {courses.map((course) => (
+            <Link
+              key={course.id}
+              href={`/admin/courses/${course.id}`}
+              className="flex items-center justify-between bg-white border border-slate-200 rounded-xl px-5 py-4 hover:border-amber-300 transition-colors group"
+            >
+              <div className="flex items-center gap-3">
+                <div>
+                  <p className="font-medium text-slate-800 group-hover:text-amber-700">{course.title}</p>
+                  <p className="text-xs text-slate-400 mt-0.5">/{course.slug}</p>
+                </div>
+              </div>
+              <div className="flex items-center gap-4">
+                <span className="text-sm text-slate-400">{course._count.modules} модулей</span>
+                <span className="text-sm text-slate-400">{course._count.enrollments} учеников</span>
+                <Badge variant={course.published ? "default" : "secondary"}>
+                  {course.published ? "Опубликован" : "Черновик"}
+                </Badge>
+              </div>
+            </Link>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}

src/app/admin/dashboard/page.tsx

@@ -1,46 +1,202 @@
-import { headers } from "next/headers";
-import { auth } from "@/lib/auth";
-import { redirect } from "next/navigation";
-import { LogoutButton } from "@/components/layout/logout-button";
+import { prisma } from "@/lib/prisma";
+import Link from "next/link";
 
 export default async function AdminDashboard() {
-  const session = await auth.api.getSession({ headers: await headers() });
+  const now = new Date();
+  const weekAgo = new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000);
+  const monthAgo = new Date(now.getTime() - 30 * 24 * 60 * 60 * 1000);
 
-  if (!session) redirect("/login");
-  if (session.user.role !== "admin") redirect("/dashboard");
+  const [
+    totalStudents,
+    newStudentsMonth,
+    totalCourses,
+    publishedCourses,
+    activeEnrollments,
+    expiringWeek,
+    homeworkPending,
+    homeworkTotal,
+    progressTotal,
+  ] = await Promise.all([
+    prisma.user.count({ where: { role: "student" } }),
+    prisma.user.count({ where: { role: "student", createdAt: { gte: monthAgo } } }),
+    prisma.course.count(),
+    prisma.course.count({ where: { published: true } }),
+    prisma.courseEnrollment.count({
+      where: { OR: [{ expiresAt: null }, { expiresAt: { gt: now } }] },
+    }),
+    prisma.courseEnrollment.count({
+      where: { expiresAt: { gt: now, lte: new Date(now.getTime() + 7 * 24 * 60 * 60 * 1000) } },
+    }),
+    prisma.homeworkSubmission.count({ where: { feedbacks: { none: {} } } }),
+    prisma.homeworkSubmission.count(),
+    prisma.lessonProgress.count(),
+  ]);
+
+  // Recent enrollments
+  const recentEnrollments = await prisma.courseEnrollment.findMany({
+    orderBy: { enrolledAt: "desc" },
+    take: 8,
+    include: {
+      user: { select: { name: true, email: true } },
+      course: { select: { title: true } },
+    },
+  });
+
+  // Most active courses (by enrollment count)
+  const topCourses = await prisma.course.findMany({
+    where: { published: true },
+    include: { _count: { select: { enrollments: true, modules: true } } },
+    orderBy: { enrollments: { _count: "desc" } },
+    take: 5,
+  });
 
   return (
-    <div className="min-h-screen bg-slate-50">
-      <header className="bg-white border-b border-slate-200 px-6 py-4 flex items-center justify-between">
-        <h1 className="text-xl font-bold text-slate-900">Second Brain — Админ</h1>
-        <div className="flex items-center gap-4">
-          <span className="text-sm text-gray-600">{session.user.name}</span>
-          <LogoutButton />
+    <div className="p-8 max-w-5xl">
+      <h1 className="text-2xl font-bold mb-1">Обзор</h1>
+      <p className="text-sm mb-8" style={{ color: "var(--muted-foreground)" }}>
+        Платформа Second Brain · {now.toLocaleDateString("ru-RU", { day: "numeric", month: "long", year: "numeric" })}
+      </p>
+
+      {/* Stats grid */}
+      <div className="grid grid-cols-2 md:grid-cols-4 gap-4 mb-8">
+        <StatCard
+          label="Студентов"
+          value={totalStudents}
+          sub={`+${newStudentsMonth} за месяц`}
+          href="/admin/users"
+        />
+        <StatCard
+          label="Курсов"
+          value={totalCourses}
+          sub={`${publishedCourses} опубликовано`}
+          href="/admin/courses"
+        />
+        <StatCard
+          label="Активных доступов"
+          value={activeEnrollments}
+          sub={expiringWeek > 0 ? `${expiringWeek} истекает на неделе` : "нет истекающих"}
+          subAccent={expiringWeek > 0}
+          href="/admin/courses"
+        />
+        <StatCard
+          label="ДЗ на проверку"
+          value={homeworkPending}
+          sub={`${homeworkTotal} всего сдано`}
+          subAccent={homeworkPending > 0}
+          href="/curator/homework"
+        />
+      </div>
+
+      <div className="grid md:grid-cols-2 gap-6">
+        {/* Recent enrollments */}
+        <div className="card-aubade p-5">
+          <div className="flex items-center justify-between mb-4">
+            <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+              Последние зачисления
+            </p>
+            <Link href="/admin/users" className="text-xs underline" style={{ color: "var(--muted-foreground)" }}>
+              Все →
+            </Link>
+          </div>
+          {recentEnrollments.length === 0 ? (
+            <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>Нет зачислений</p>
+          ) : (
+            <div className="space-y-2">
+              {recentEnrollments.map((e) => (
+                <div key={`${e.userId}-${e.courseId}`} className="flex items-center gap-3 text-sm">
+                  <div className="flex-1 min-w-0">
+                    <p className="font-medium truncate">{e.user.name}</p>
+                    <p className="text-xs truncate" style={{ color: "var(--muted-foreground)" }}>{e.course.title}</p>
+                  </div>
+                  <span className="text-xs shrink-0" style={{ color: "var(--muted-foreground)" }}>
+                    {new Date(e.enrolledAt).toLocaleDateString("ru-RU")}
+                  </span>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Top courses + progress stat */}
+        <div className="space-y-6">
+          <div className="card-aubade p-5">
+            <div className="flex items-center justify-between mb-4">
+              <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+                Популярные курсы
+              </p>
+              <Link href="/admin/courses" className="text-xs underline" style={{ color: "var(--muted-foreground)" }}>
+                Все →
+              </Link>
+            </div>
+            {topCourses.length === 0 ? (
+              <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>Нет курсов</p>
+            ) : (
+              <div className="space-y-3">
+                {topCourses.map((c) => (
+                  <div key={c.id} className="flex items-center gap-3 text-sm">
+                    <div className="flex-1 min-w-0">
+                      <p className="font-medium truncate">{c.title}</p>
+                      <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                        {c._count.modules} модулей
+                      </p>
+                    </div>
+                    <div className="text-right shrink-0">
+                      <p className="font-bold">{c._count.enrollments}</p>
+                      <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>студентов</p>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            )}
+          </div>
+
+          <div className="card-aubade p-5">
+            <p className="text-xs font-bold uppercase tracking-widest mb-3" style={{ color: "var(--muted-foreground)" }}>
+              Активность
+            </p>
+            <div className="flex items-end gap-6">
+              <div>
+                <p className="text-3xl font-bold">{progressTotal}</p>
+                <p className="text-xs mt-0.5" style={{ color: "var(--muted-foreground)" }}>уроков пройдено</p>
+              </div>
+              <div>
+                <p className="text-3xl font-bold">{homeworkTotal}</p>
+                <p className="text-xs mt-0.5" style={{ color: "var(--muted-foreground)" }}>работ сдано</p>
               </div>
-      </header>
-      <main className="max-w-5xl mx-auto px-6 py-10">
-        <h2 className="text-2xl font-semibold text-gray-800 mb-2">
-          Панель администратора
-        </h2>
-        <p className="text-gray-500 mb-8">Управление платформой Second Brain.</p>
-        <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
-          <div className="bg-white rounded-2xl border border-slate-200 p-6">
-            <p className="text-3xl mb-2">📚</p>
-            <p className="font-medium text-gray-800">Курсы</p>
-            <p className="text-sm text-gray-400 mt-1">CRUD — Этап 1</p>
             </div>
-          <div className="bg-white rounded-2xl border border-slate-200 p-6">
-            <p className="text-3xl mb-2">👥</p>
-            <p className="font-medium text-gray-800">Пользователи</p>
-            <p className="text-sm text-gray-400 mt-1">Управление — Этап 1</p>
           </div>
-          <div className="bg-white rounded-2xl border border-slate-200 p-6">
-            <p className="text-3xl mb-2">📊</p>
-            <p className="font-medium text-gray-800">Аналитика</p>
-            <p className="text-sm text-gray-400 mt-1">Этап 10</p>
         </div>
       </div>
-      </main>
     </div>
   );
 }
+
+function StatCard({
+  label,
+  value,
+  sub,
+  subAccent,
+  href,
+}: {
+  label: string;
+  value: number;
+  sub?: string;
+  subAccent?: boolean;
+  href?: string;
+}) {
+  const content = (
+    <div className="card-aubade p-4">
+      <p className="text-3xl font-bold">{value}</p>
+      <p className="text-xs font-bold uppercase tracking-widest mt-1" style={{ color: "var(--muted-foreground)" }}>
+        {label}
+      </p>
+      {sub && (
+        <p className="text-xs mt-1.5" style={{ color: subAccent ? "oklch(0.577 0.245 27.325)" : "var(--muted-foreground)" }}>
+          {sub}
+        </p>
+      )}
+    </div>
+  );
+
+  return href ? <Link href={href}>{content}</Link> : content;
+}

src/app/admin/import-export/import-actions.ts

@@ -0,0 +1,260 @@
+"use server";
+
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import bcrypt from "bcryptjs";
+import iconv from "iconv-lite";
+import { sendWelcomeEmail } from "@/lib/email";
+
+// ── Types ─────────────────────────────────────────────────────────────────────
+
+export type ParsedRow = {
+  index: number;
+  email: string;
+  name: string;
+  lastName: string;
+  phone: string;
+  // resolved during preview
+  status: "new" | "update" | "error";
+  errorMsg?: string;
+  existingId?: string;
+};
+
+export type PreviewResult = {
+  rows: ParsedRow[];
+  countNew: number;
+  countUpdate: number;
+  countError: number;
+};
+
+export type ImportOptions = {
+  updateExisting: boolean;
+  autoVerifyEmail: boolean;
+  courseId?: string;
+  accessDays: number; // 0 = unlimited
+  sendWelcome: boolean;
+  encoding: "utf8" | "win1251";
+};
+
+export type ApplyResult = {
+  created: number;
+  updated: number;
+  errors: string[];
+};
+
+// ── Helpers ───────────────────────────────────────────────────────────────────
+
+function parseCSVLine(line: string): string[] {
+  const result: string[] = [];
+  let current = "";
+  let inQuotes = false;
+
+  for (let i = 0; i < line.length; i++) {
+    const ch = line[i];
+    if (ch === '"') {
+      if (inQuotes && line[i + 1] === '"') {
+        current += '"';
+        i++;
+      } else {
+        inQuotes = !inQuotes;
+      }
+    } else if ((ch === "," || ch === ";") && !inQuotes) {
+      result.push(current.trim());
+      current = "";
+    } else {
+      current += ch;
+    }
+  }
+  result.push(current.trim());
+  return result;
+}
+
+function normalizeHeaders(headers: string[]): Record<string, number> {
+  const map: Record<string, number> = {};
+  const aliases: Record<string, string[]> = {
+    email: ["email", "e-mail", "почта", "login", "логин"],
+    name: ["имя", "name", "firstname", "first_name", "имя пользователя"],
+    lastName: ["фамилия", "lastname", "last_name", "surname"],
+    phone: ["телефон", "phone", "tel", "мобильный"],
+  };
+
+  headers.forEach((h, i) => {
+    const lower = h.toLowerCase().replace(/[^a-zа-яё0-9]/gi, "");
+    for (const [field, aliasList] of Object.entries(aliases)) {
+      if (aliasList.some((a) => lower.includes(a.toLowerCase().replace(/[^a-zа-яё0-9]/gi, "")))) {
+        if (!(field in map)) map[field] = i;
+      }
+    }
+  });
+
+  return map;
+}
+
+async function assertAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Нет доступа");
+  return session;
+}
+
+// ── Parse action ──────────────────────────────────────────────────────────────
+
+export async function parseCSV(
+  base64: string,
+  encoding: "utf8" | "win1251",
+  updateExisting: boolean
+): Promise<PreviewResult> {
+  await assertAdmin();
+
+  // Decode bytes
+  const buffer = Buffer.from(base64, "base64");
+  const text = encoding === "win1251"
+    ? iconv.decode(buffer, "win1251")
+    : buffer.toString("utf8");
+
+  // Split lines (handle \r\n and \n)
+  const lines = text.replace(/\r\n/g, "\n").replace(/\r/g, "\n").split("\n");
+  const nonEmpty = lines.filter((l) => l.trim().length > 0);
+  if (nonEmpty.length < 2) {
+    return { rows: [], countNew: 0, countUpdate: 0, countError: 0 };
+  }
+
+  const headerLine = parseCSVLine(nonEmpty[0]);
+  const colMap = normalizeHeaders(headerLine);
+
+  if (colMap.email === undefined) {
+    throw new Error("Не найдена колонка Email. Проверьте заголовки CSV-файла.");
+  }
+
+  // Load existing emails for fast lookup
+  const existingUsers = await prisma.user.findMany({
+    select: { id: true, email: true },
+  });
+  const existingByEmail = new Map(existingUsers.map((u) => [u.email.toLowerCase(), u.id]));
+
+  const rows: ParsedRow[] = [];
+  let countNew = 0, countUpdate = 0, countError = 0;
+
+  for (let i = 1; i < nonEmpty.length; i++) {
+    const cols = parseCSVLine(nonEmpty[i]);
+    const email = (cols[colMap.email] ?? "").trim().toLowerCase();
+    const name = (cols[colMap.name ?? -1] ?? "").trim();
+    const lastName = (cols[colMap.lastName ?? -1] ?? "").trim();
+    const phone = (cols[colMap.phone ?? -1] ?? "").trim();
+
+    const row: ParsedRow = {
+      index: i,
+      email,
+      name: [name, lastName].filter(Boolean).join(" ") || email.split("@")[0],
+      lastName,
+      phone,
+      status: "new",
+    };
+
+    if (!email || !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
+      row.status = "error";
+      row.errorMsg = "Некорректный email";
+      countError++;
+    } else if (existingByEmail.has(email)) {
+      row.existingId = existingByEmail.get(email);
+      if (updateExisting) {
+        row.status = "update";
+        countUpdate++;
+      } else {
+        row.status = "error";
+        row.errorMsg = "Уже существует (обновление отключено)";
+        countError++;
+      }
+    } else {
+      row.status = "new";
+      countNew++;
+    }
+
+    rows.push(row);
+  }
+
+  return { rows, countNew, countUpdate, countError };
+}
+
+// ── Apply action ──────────────────────────────────────────────────────────────
+
+export async function applyImport(
+  rows: ParsedRow[],
+  options: ImportOptions
+): Promise<ApplyResult> {
+  await assertAdmin();
+
+  let created = 0, updated = 0;
+  const errors: string[] = [];
+
+  const validRows = rows.filter((r) => r.status !== "error");
+
+  for (const row of validRows) {
+    try {
+      if (row.status === "new") {
+        // Generate a random password
+        const rawPassword = Math.random().toString(36).slice(-10) + "A1!";
+        const hashedPassword = await bcrypt.hash(rawPassword, 10);
+
+        const user = await prisma.user.create({
+          data: {
+            name: row.name,
+            email: row.email,
+            emailVerified: options.autoVerifyEmail,
+            role: "student",
+          },
+        });
+
+        await prisma.account.create({
+          data: {
+            userId: user.id,
+            accountId: user.id,
+            providerId: "credential",
+            password: hashedPassword,
+          },
+        });
+
+        if (options.courseId) {
+          const expiresAt = options.accessDays > 0
+            ? new Date(Date.now() + options.accessDays * 86_400_000)
+            : null;
+          await prisma.courseEnrollment.upsert({
+            where: { userId_courseId: { userId: user.id, courseId: options.courseId } },
+            update: { expiresAt },
+            create: { userId: user.id, courseId: options.courseId, expiresAt },
+          });
+        }
+
+        if (options.sendWelcome) {
+          await sendWelcomeEmail(user.email, user.name).catch(() => {});
+        }
+
+        created++;
+      } else if (row.status === "update" && row.existingId) {
+        await prisma.user.update({
+          where: { id: row.existingId },
+          data: {
+            name: row.name || undefined,
+          },
+        });
+
+        if (options.courseId) {
+          const expiresAt = options.accessDays > 0
+            ? new Date(Date.now() + options.accessDays * 86_400_000)
+            : null;
+          await prisma.courseEnrollment.upsert({
+            where: { userId_courseId: { userId: row.existingId, courseId: options.courseId } },
+            update: { expiresAt },
+            create: { userId: row.existingId, courseId: options.courseId, expiresAt },
+          });
+        }
+
+        updated++;
+      }
+    } catch (e) {
+      errors.push(`${row.email}: ${e instanceof Error ? e.message : "Ошибка"}`);
+    }
+  }
+
+  return { created, updated, errors };
+}

src/app/admin/import-export/page.tsx

@@ -0,0 +1,49 @@
+import { prisma } from "@/lib/prisma";
+import { CsvImporter } from "@/components/admin/csv-importer";
+import { CsvExporter } from "@/components/admin/csv-exporter";
+
+export const metadata = { title: "Импорт и экспорт" };
+
+export default async function ImportExportPage() {
+  const courses = await prisma.course.findMany({
+    orderBy: { title: "asc" },
+    select: { id: true, title: true },
+  });
+
+  return (
+    <div className="p-8 max-w-3xl">
+      <div className="mb-8">
+        <h1
+          className="text-xs font-bold uppercase tracking-widest"
+          style={{ color: "var(--muted-foreground)" }}
+        >
+          Импорт и экспорт
+        </h1>
+      </div>
+
+      <div className="space-y-6">
+        {/* Import */}
+        <div className="card-aubade p-6">
+          <p
+            className="text-xs font-bold uppercase tracking-widest mb-5"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            Импорт учеников из CSV
+          </p>
+          <CsvImporter courses={courses} />
+        </div>
+
+        {/* Export */}
+        <div className="card-aubade p-6">
+          <p
+            className="text-xs font-bold uppercase tracking-widest mb-5"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            Экспорт учеников в CSV
+          </p>
+          <CsvExporter courses={courses} />
+        </div>
+      </div>
+    </div>
+  );
+}

src/app/admin/layout.tsx

@@ -0,0 +1,12 @@
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { AdminShell } from "@/components/admin/admin-shell";
+
+export default async function AdminLayout({ children }: { children: React.ReactNode }) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) redirect("/login");
+  if (session.user.role !== "admin") redirect("/dashboard");
+
+  return <AdminShell userName={session.user.name}>{children}</AdminShell>;
+}

src/app/admin/settings/actions.ts

@@ -0,0 +1,27 @@
+"use server";
+
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { revalidatePath } from "next/cache";
+import { SETTINGS_DEFAULTS, type SettingsKey } from "@/lib/settings";
+
+export async function saveSettings(data: Record<string, string>) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Нет доступа");
+
+  const validKeys = Object.keys(SETTINGS_DEFAULTS) as SettingsKey[];
+  const ops = validKeys
+    .filter((key) => key in data)
+    .map((key) =>
+      prisma.settings.upsert({
+        where: { key },
+        update: { value: data[key] },
+        create: { key, value: data[key] },
+      })
+    );
+
+  await Promise.all(ops);
+  revalidatePath("/admin/settings");
+  revalidatePath("/", "layout");
+}

src/app/admin/settings/page.tsx

@@ -0,0 +1,22 @@
+import { getSettings } from "@/lib/settings";
+import { SettingsForm } from "@/components/admin/settings-form";
+
+export const metadata = { title: "Настройки платформы" };
+
+export default async function SettingsPage() {
+  const settings = await getSettings();
+
+  return (
+    <div className="p-8 max-w-2xl">
+      <div className="mb-6">
+        <h1
+          className="text-xs font-bold uppercase tracking-widest"
+          style={{ color: "var(--muted-foreground)" }}
+        >
+          Настройки платформы
+        </h1>
+      </div>
+      <SettingsForm initial={settings} />
+    </div>
+  );
+}

src/app/admin/users/[userId]/actions.ts

@@ -0,0 +1,59 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { revalidatePath } from "next/cache";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+  return session;
+}
+
+export async function bulkGrantAccess(
+  userId: string,
+  courseIds: string[],
+  expiresAt?: string | null
+) {
+  const session = await requireAdmin();
+  const expiry = expiresAt ? new Date(expiresAt) : null;
+
+  await Promise.all(
+    courseIds.map(async (courseId) => {
+      await prisma.courseEnrollment.upsert({
+        where: { userId_courseId: { userId, courseId } },
+        update: { expiresAt: expiry },
+        create: { userId, courseId, expiresAt: expiry },
+      });
+      await prisma.accessLog.create({
+        data: {
+          courseId,
+          userId,
+          action: "granted",
+          method: "bulk",
+          grantedById: session.user.id,
+        },
+      });
+    })
+  );
+
+  revalidatePath(`/admin/users/${userId}`);
+}
+
+export async function revokeUserAccess(userId: string, courseId: string) {
+  const session = await requireAdmin();
+  await prisma.courseEnrollment.delete({
+    where: { userId_courseId: { userId, courseId } },
+  });
+  await prisma.accessLog.create({
+    data: {
+      courseId,
+      userId,
+      action: "revoked",
+      method: "manual",
+      grantedById: session.user.id,
+    },
+  });
+  revalidatePath(`/admin/users/${userId}`);
+}

src/app/admin/users/[userId]/page.tsx

@@ -0,0 +1,105 @@
+import { prisma } from "@/lib/prisma";
+import { notFound } from "next/navigation";
+import Link from "next/link";
+import { UserEnrollmentManager } from "@/components/admin/user-enrollment-manager";
+
+interface Props {
+  params: Promise<{ userId: string }>;
+}
+
+export default async function UserPage({ params }: Props) {
+  const { userId } = await params;
+
+  const [user, allCourses] = await Promise.all([
+    prisma.user.findUnique({
+      where: { id: userId },
+      include: {
+        enrollments: {
+          include: { course: { select: { id: true, title: true, published: true } } },
+          orderBy: { enrolledAt: "desc" },
+        },
+        accessLogs: {
+          orderBy: { createdAt: "desc" },
+          take: 30,
+          include: {
+            course: { select: { title: true } },
+            grantedBy: { select: { name: true } },
+          },
+        },
+      },
+    }),
+    prisma.course.findMany({
+      orderBy: { title: "asc" },
+      select: { id: true, title: true, published: true },
+    }),
+  ]);
+
+  if (!user) notFound();
+
+  const roleLabel: Record<string, string> = { admin: "Администратор", curator: "Куратор", student: "Ученик" };
+
+  return (
+    <div className="p-8 max-w-3xl">
+      <nav className="text-xs mb-6 uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+        <Link href="/admin/users" className="hover:underline">Пользователи</Link>
+        <span className="mx-2">/</span>
+        <span style={{ color: "var(--foreground)" }}>{user.name}</span>
+      </nav>
+
+      {/* User info */}
+      <section className="card-aubade p-6 mb-6">
+        <div className="flex items-start justify-between">
+          <div>
+            <h1 className="text-xl font-bold">{user.name}</h1>
+            <p className="text-sm mt-0.5" style={{ color: "var(--muted-foreground)" }}>{user.email}</p>
+          </div>
+          <div className="flex flex-col items-end gap-1">
+            <span className="tag-aubade">{roleLabel[user.role] ?? user.role}</span>
+            <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+              с {new Date(user.createdAt).toLocaleDateString("ru-RU")}
+            </span>
+          </div>
+        </div>
+      </section>
+
+      {/* Enrollments + bulk grant */}
+      <section className="card-aubade p-6 mb-6">
+        <p className="text-xs font-bold uppercase tracking-widest mb-5" style={{ color: "var(--muted-foreground)" }}>
+          Доступ к курсам
+        </p>
+        <UserEnrollmentManager
+          userId={userId}
+          allCourses={allCourses}
+          enrollments={user.enrollments.map((e) => ({
+            courseId: e.courseId,
+            expiresAt: e.expiresAt,
+            courseTitle: e.course.title,
+          }))}
+        />
+      </section>
+
+      {/* Access log */}
+      {user.accessLogs.length > 0 && (
+        <section className="card-aubade p-6">
+          <p className="text-xs font-bold uppercase tracking-widest mb-4" style={{ color: "var(--muted-foreground)" }}>
+            История доступа
+          </p>
+          <div className="space-y-1.5 max-h-72 overflow-y-auto">
+            {user.accessLogs.map((log) => (
+              <div key={log.id} className="flex items-center gap-3 px-3 py-2 text-xs" style={{ border: "2px solid var(--border)" }}>
+                <span style={{ color: log.action === "granted" ? "#3A6A3A" : "oklch(0.577 0.245 27.325)", fontWeight: 700, minWidth: 70 }}>
+                  {log.action === "granted" ? "▲ Выдан" : "▼ Отозван"}
+                </span>
+                <span className="flex-1">{log.course.title}</span>
+                <span style={{ color: "var(--muted-foreground)" }}>{log.grantedBy?.name ?? "—"}</span>
+                <span style={{ color: "var(--muted-foreground)" }}>
+                  {new Date(log.createdAt).toLocaleString("ru-RU", { day: "2-digit", month: "2-digit", hour: "2-digit", minute: "2-digit" })}
+                </span>
+              </div>
+            ))}
+          </div>
+        </section>
+      )}
+    </div>
+  );
+}

src/app/admin/users/actions.ts

@@ -0,0 +1,54 @@
+"use server";
+
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import bcrypt from "bcryptjs";
+import { sendWelcomeEmail } from "@/lib/email";
+
+export async function createUser(data: {
+  name: string;
+  email: string;
+  password: string;
+  role: string;
+  emailVerified: boolean;
+  sendWelcome: boolean;
+}): Promise<{ success: true; userId: string } | { success: false; error: string }> {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") {
+    return { success: false, error: "Нет доступа" };
+  }
+
+  const { name, email, password, role, emailVerified, sendWelcome } = data;
+
+  if (!name.trim() || !email.trim() || !password.trim()) {
+    return { success: false, error: "Заполните все обязательные поля" };
+  }
+
+  const existing = await prisma.user.findUnique({ where: { email } });
+  if (existing) {
+    return { success: false, error: "Пользователь с таким email уже существует" };
+  }
+
+  const hashedPassword = await bcrypt.hash(password, 10);
+
+  const user = await prisma.user.create({
+    data: { name: name.trim(), email: email.trim().toLowerCase(), role, emailVerified },
+  });
+
+  // Create credential account (Better Auth's internal structure)
+  await prisma.account.create({
+    data: {
+      userId: user.id,
+      accountId: user.id,
+      providerId: "credential",
+      password: hashedPassword,
+    },
+  });
+
+  if (sendWelcome) {
+    await sendWelcomeEmail(user.email, user.name).catch(() => {});
+  }
+
+  return { success: true, userId: user.id };
+}

src/app/admin/users/new/page.tsx

@@ -0,0 +1,29 @@
+import Link from "next/link";
+import { CreateUserForm } from "@/components/admin/create-user-form";
+
+export const metadata = { title: "Новый пользователь" };
+
+export default function NewUserPage() {
+  return (
+    <div className="p-8">
+      <nav className="text-xs mb-6 uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+        <Link href="/admin/users" className="hover:underline">Пользователи</Link>
+        <span className="mx-2">/</span>
+        <span style={{ color: "var(--foreground)" }}>Новый пользователь</span>
+      </nav>
+
+      <div className="mb-6">
+        <h1
+          className="text-xs font-bold uppercase tracking-widest"
+          style={{ color: "var(--muted-foreground)" }}
+        >
+          Создание пользователя
+        </h1>
+      </div>
+
+      <div className="card-aubade p-6">
+        <CreateUserForm />
+      </div>
+    </div>
+  );
+}

src/app/admin/users/page.tsx

@@ -0,0 +1,127 @@
+import { prisma } from "@/lib/prisma";
+import Link from "next/link";
+import { UserPlus } from "lucide-react";
+import { UsersTable } from "@/components/admin/users-table";
+import { Suspense } from "react";
+import { UsersSearch } from "@/components/admin/users-search";
+
+const PAGE_SIZE = 20;
+
+interface Props {
+  searchParams: Promise<{ search?: string; role?: string; page?: string }>;
+}
+
+export default async function UsersPage({ searchParams }: Props) {
+  const { search = "", role = "", page = "1" } = await searchParams;
+  const currentPage = Math.max(1, parseInt(page) || 1);
+  const skip = (currentPage - 1) * PAGE_SIZE;
+
+  const where = {
+    ...(search
+      ? {
+          OR: [
+            { name: { contains: search, mode: "insensitive" as const } },
+            { email: { contains: search, mode: "insensitive" as const } },
+          ],
+        }
+      : {}),
+    ...(role ? { role } : {}),
+  };
+
+  const [users, total] = await Promise.all([
+    prisma.user.findMany({
+      where,
+      orderBy: { createdAt: "desc" },
+      skip,
+      take: PAGE_SIZE,
+      include: {
+        _count: { select: { enrollments: true } },
+        enrollments: {
+          include: { course: { select: { title: true } } },
+          orderBy: { enrolledAt: "desc" },
+        },
+      },
+    }),
+    prisma.user.count({ where }),
+  ]);
+
+  const totalPages = Math.ceil(total / PAGE_SIZE);
+
+  const tableUsers = users.map((u) => ({
+    id: u.id,
+    name: u.name,
+    email: u.email,
+    role: u.role,
+    emailVerified: u.emailVerified,
+    createdAt: u.createdAt,
+    enrollmentCount: u._count.enrollments,
+    enrollments: u.enrollments.map((e) => ({
+      courseId: e.courseId,
+      courseTitle: e.course.title,
+      expiresAt: e.expiresAt,
+    })),
+  }));
+
+  function pageUrl(p: number) {
+    const params = new URLSearchParams();
+    if (search) params.set("search", search);
+    if (role) params.set("role", role);
+    params.set("page", String(p));
+    return `/admin/users?${params.toString()}`;
+  }
+
+  return (
+    <div className="p-8">
+      <div className="mb-5 flex items-center justify-between">
+        <div>
+          <h1 className="text-2xl font-semibold text-slate-800">Пользователи</h1>
+          <p className="text-slate-500 text-sm mt-0.5">{total} пользователей</p>
+        </div>
+        <Link
+          href="/admin/users/new"
+          className="btn-aubade btn-aubade-accent flex items-center gap-1.5 px-4 py-2 text-sm"
+        >
+          <UserPlus size={14} />
+          Добавить пользователя
+        </Link>
+      </div>
+
+      {/* Filters */}
+      <Suspense>
+        <UsersSearch initialSearch={search} initialRole={role} />
+      </Suspense>
+
+      <UsersTable users={tableUsers} />
+
+      {/* Pagination */}
+      {totalPages > 1 && (
+        <div className="flex items-center gap-1 mt-4">
+          {currentPage > 1 && (
+            <Link href={pageUrl(currentPage - 1)} className="btn-aubade px-3 py-1 text-xs">←</Link>
+          )}
+          {Array.from({ length: totalPages }, (_, i) => i + 1)
+            .filter((p) => p === 1 || p === totalPages || Math.abs(p - currentPage) <= 2)
+            .reduce<(number | "…")[]>((acc, p, i, arr) => {
+              if (i > 0 && (p as number) - (arr[i - 1] as number) > 1) acc.push("…");
+              acc.push(p);
+              return acc;
+            }, [])
+            .map((p, i) =>
+              p === "…" ? (
+                <span key={`e${i}`} className="px-2 text-xs" style={{ color: "var(--muted-foreground)" }}>…</span>
+              ) : (
+                <Link key={p} href={pageUrl(p as number)} className="px-3 py-1 text-xs"
+                  style={{ border: "2px solid var(--border)", background: p === currentPage ? "var(--foreground)" : "transparent", color: p === currentPage ? "var(--background)" : "var(--foreground)" }}>
+                  {p}
+                </Link>
+              )
+            )}
+          {currentPage < totalPages && (
+            <Link href={pageUrl(currentPage + 1)} className="btn-aubade px-3 py-1 text-xs">→</Link>
+          )}
+          <span className="ml-2 text-xs" style={{ color: "var(--muted-foreground)" }}>стр. {currentPage} из {totalPages}</span>
+        </div>
+      )}
+    </div>
+  );
+}

src/app/api/admin/export-users/route.ts

@@ -0,0 +1,64 @@
+import { NextRequest, NextResponse } from "next/server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import iconv from "iconv-lite";
+
+export async function GET(request: NextRequest) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") {
+    return NextResponse.json({ error: "Нет доступа" }, { status: 403 });
+  }
+
+  const { searchParams } = request.nextUrl;
+  const courseId = searchParams.get("courseId") || undefined;
+  const encoding = (searchParams.get("encoding") as "utf8" | "win1251") ?? "utf8";
+
+  // Fetch users
+  const users = await prisma.user.findMany({
+    where: courseId
+      ? { enrollments: { some: { courseId } } }
+      : { role: "student" },
+    orderBy: { createdAt: "desc" },
+    include: {
+      enrollments: {
+        include: { course: { select: { title: true } } },
+      },
+      progress: { select: { lessonId: true } },
+    },
+  });
+
+  // Build CSV rows
+  const csvHeaders = ["Email", "Имя", "Телефон", "Дата регистрации", "Курсы", "Прогресс (уроков)"];
+  const rows = users.map((u) => {
+    const courses = u.enrollments.map((e) => e.course.title).join(" | ");
+    const progress = u.progress.length;
+    const registeredAt = new Date(u.createdAt).toLocaleDateString("ru-RU");
+    return [u.email, u.name, "", registeredAt, courses, String(progress)];
+  });
+
+  const allRows = [csvHeaders, ...rows];
+  const csvText = allRows
+    .map((row) => row.map((cell) => `"${String(cell).replace(/"/g, '""')}"`).join(";"))
+    .join("\r\n");
+
+  // Encode
+  let body: Buffer;
+  let charset: string;
+  if (encoding === "win1251") {
+    body = iconv.encode(csvText, "win1251");
+    charset = "windows-1251";
+  } else {
+    body = Buffer.from("\uFEFF" + csvText, "utf8"); // BOM for Excel
+    charset = "utf-8";
+  }
+
+  const filename = `students_${new Date().toISOString().slice(0, 10)}.csv`;
+
+  return new NextResponse(body as unknown as BodyInit, {
+    headers: {
+      "Content-Type": `text/csv; charset=${charset}`,
+      "Content-Disposition": `attachment; filename="${filename}"`,
+    },
+  });
+}

src/app/api/admin/import-md/route.ts

@@ -0,0 +1,39 @@
+import { NextRequest, NextResponse } from "next/server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import matter from "gray-matter";
+import { mdToTiptap } from "@/lib/md-to-tiptap";
+
+export async function POST(req: NextRequest) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  const formData = await req.formData();
+  const file = formData.get("file") as File | null;
+
+  if (!file) {
+    return NextResponse.json({ error: "No file provided" }, { status: 400 });
+  }
+  if (!file.name.endsWith(".md")) {
+    return NextResponse.json({ error: "Only .md files are supported" }, { status: 400 });
+  }
+
+  const raw = await file.text();
+  const { data: fm, content } = matter(raw);
+
+  // Extract known frontmatter fields (Obsidian-compatible naming)
+  const title =
+    typeof fm.title === "string" ? fm.title.trim() : null;
+  const kinescopeId =
+    (fm.kinescopeId ?? fm.kinescope_id ?? fm.videoId ?? fm.video_id ?? "") as string;
+  const order =
+    typeof fm.order === "number" ? fm.order : null;
+  const published =
+    typeof fm.published === "boolean" ? fm.published : null;
+
+  const tiptapContent = mdToTiptap(content);
+
+  return NextResponse.json({ title, kinescopeId, order, published, content: tiptapContent });
+}

src/app/api/admin/lesson-files/route.ts

@@ -0,0 +1,41 @@
+import { NextRequest, NextResponse } from "next/server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { uploadFile, deleteFile } from "@/lib/s3";
+import { randomUUID } from "crypto";
+
+export async function POST(req: NextRequest) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") {
+    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  }
+
+  const form = await req.formData();
+  const file = form.get("file") as File | null;
+  const lessonId = form.get("lessonId") as string | null;
+  if (!file || !lessonId) return NextResponse.json({ error: "Missing fields" }, { status: 400 });
+
+  const ext = file.name.split(".").pop() ?? "bin";
+  const key = `lessons/${lessonId}/${randomUUID()}.${ext}`;
+  const buffer = Buffer.from(await file.arrayBuffer());
+  const url = await uploadFile(key, buffer, file.type);
+
+  const lessonFile = await prisma.lessonFile.create({
+    data: { lessonId, name: file.name, url, size: file.size },
+  });
+
+  return NextResponse.json(lessonFile);
+}
+
+export async function DELETE(req: NextRequest) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") {
+    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  }
+
+  const { fileId, key } = await req.json();
+  if (key) await deleteFile(key).catch(() => {});
+  await prisma.lessonFile.delete({ where: { id: fileId } });
+  return NextResponse.json({ ok: true });
+}

src/app/api/admin/upload/route.ts

@@ -0,0 +1,23 @@
+import { NextRequest, NextResponse } from "next/server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { uploadFile } from "@/lib/s3";
+import { randomUUID } from "crypto";
+
+export async function POST(req: NextRequest) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") {
+    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  }
+
+  const form = await req.formData();
+  const file = form.get("file") as File | null;
+  if (!file) return NextResponse.json({ error: "No file" }, { status: 400 });
+
+  const ext = file.name.split(".").pop() ?? "bin";
+  const key = `uploads/${randomUUID()}.${ext}`;
+  const buffer = Buffer.from(await file.arrayBuffer());
+
+  const url = await uploadFile(key, buffer, file.type);
+  return NextResponse.json({ url, key });
+}

src/app/api/student/homework-upload/route.ts

@@ -0,0 +1,21 @@
+import { NextRequest, NextResponse } from "next/server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { uploadFile } from "@/lib/s3";
+import { randomUUID } from "crypto";
+
+export async function POST(req: NextRequest) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+
+  const form = await req.formData();
+  const file = form.get("file") as File | null;
+  if (!file) return NextResponse.json({ error: "Missing file" }, { status: 400 });
+
+  const ext = file.name.split(".").pop() ?? "bin";
+  const key = `homework/${session.user.id}/${randomUUID()}.${ext}`;
+  const buffer = Buffer.from(await file.arrayBuffer());
+  const url = await uploadFile(key, buffer, file.type);
+
+  return NextResponse.json({ name: file.name, url, size: file.size });
+}

src/app/curator/dashboard/page.tsx

@@ -1,43 +1,57 @@
 import { headers } from "next/headers";
 import { auth } from "@/lib/auth";
 import { redirect } from "next/navigation";
-import { LogoutButton } from "@/components/layout/logout-button";
+import { prisma } from "@/lib/prisma";
+import Link from "next/link";
 
 export default async function CuratorDashboard() {
   const session = await auth.api.getSession({ headers: await headers() });
-
   if (!session) redirect("/login");
-  if (session.user.role !== "curator" && session.user.role !== "admin") {
-    redirect("/dashboard");
-  }
+
+  const [pending, total, recentFeedbacks] = await Promise.all([
+    prisma.homeworkSubmission.count({ where: { feedbacks: { none: {} } } }),
+    prisma.homeworkSubmission.count(),
+    prisma.homeworkFeedback.count({
+      where: {
+        createdAt: { gte: new Date(Date.now() - 7 * 24 * 60 * 60 * 1000) },
+        curatorId: session.user.id,
+      },
+    }),
+  ]);
 
   return (
-    <div className="min-h-screen bg-green-50">
-      <header className="bg-white border-b border-green-100 px-6 py-4 flex items-center justify-between">
-        <h1 className="text-xl font-bold text-green-900">Second Brain — Куратор</h1>
-        <div className="flex items-center gap-4">
-          <span className="text-sm text-gray-600">{session.user.name}</span>
-          <LogoutButton />
+    <div className="p-8 max-w-3xl">
+      <h1 className="text-2xl font-bold mb-1">Обзор</h1>
+      <p className="text-sm mb-8" style={{ color: "var(--muted-foreground)" }}>Панель куратора</p>
+
+      <div className="grid grid-cols-3 gap-4 mb-8">
+        <StatCard label="Ожидают проверки" value={pending} accent={pending > 0} />
+        <StatCard label="Всего сдано" value={total} />
+        <StatCard label="Проверено за 7 дней" value={recentFeedbacks} />
       </div>
-      </header>
-      <main className="max-w-4xl mx-auto px-6 py-10">
-        <h2 className="text-2xl font-semibold text-gray-800 mb-2">
-          Панель куратора
-        </h2>
-        <p className="text-gray-500 mb-8">Здесь будут домашние задания на проверку.</p>
-        <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
-          <div className="bg-white rounded-2xl border border-green-100 p-6">
-            <p className="text-3xl mb-2">📝</p>
-            <p className="font-medium text-gray-800">Домашние задания</p>
-            <p className="text-sm text-gray-400 mt-1">Новых заданий нет</p>
+
+      {pending > 0 ? (
+        <Link href="/curator/homework" className="btn-aubade btn-aubade-accent inline-flex items-center gap-2 px-5 py-2.5 text-sm">
+          Перейти к проверке ({pending}) →
+        </Link>
+      ) : (
+        <div className="card-aubade p-8 text-center">
+          <p className="text-3xl mb-2">✓</p>
+          <p className="font-bold">Все работы проверены</p>
+          <p className="text-sm mt-1" style={{ color: "var(--muted-foreground)" }}>Новых заданий нет</p>
         </div>
-          <div className="bg-white rounded-2xl border border-green-100 p-6">
-            <p className="text-3xl mb-2">👥</p>
-            <p className="font-medium text-gray-800">Мои ученики</p>
-            <p className="text-sm text-gray-400 mt-1">Откроется в Этапе 3</p>
-          </div>
-        </div>
-      </main>
+      )}
+    </div>
+  );
+}
+
+function StatCard({ label, value, accent }: { label: string; value: number; accent?: boolean }) {
+  return (
+    <div className="card-aubade p-4">
+      <p className="text-3xl font-bold" style={{ color: accent ? "oklch(0.577 0.245 27.325)" : "var(--foreground)" }}>
+        {value}
+      </p>
+      <p className="text-xs mt-1 uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>{label}</p>
     </div>
   );
 }

src/app/curator/homework/[submissionId]/actions.ts

@@ -0,0 +1,51 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { auth } from "@/lib/auth";
+import { headers } from "next/headers";
+import { revalidatePath } from "next/cache";
+import { sendFeedbackReceivedEmail } from "@/lib/email";
+
+export async function submitFeedback(submissionId: string, text: string) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || (session.user.role !== "curator" && session.user.role !== "admin")) {
+    throw new Error("Forbidden");
+  }
+
+  await prisma.homeworkFeedback.create({
+    data: { submissionId, curatorId: session.user.id, text },
+  });
+
+  // Send email to student
+  const submission = await prisma.homeworkSubmission.findUnique({
+    where: { id: submissionId },
+    include: {
+      user: { select: { email: true, name: true } },
+      homework: {
+        include: {
+          lesson: {
+            select: {
+              title: true,
+              module: { select: { course: { select: { slug: true } } } },
+            },
+          },
+        },
+      },
+    },
+  });
+
+  if (submission) {
+    const { lesson } = submission.homework;
+    const lessonUrl = `${process.env.BETTER_AUTH_URL ?? "https://school.second-brain.ru"}/courses/${lesson.module.course.slug}/lessons/${submission.homework.lessonId}`;
+    await sendFeedbackReceivedEmail(
+      submission.user.email,
+      submission.user.name,
+      lesson.title,
+      text,
+      lessonUrl
+    );
+  }
+
+  revalidatePath("/curator/homework");
+  revalidatePath(`/curator/homework/${submissionId}`);
+}

src/app/curator/homework/[submissionId]/feedback-form.tsx

@@ -0,0 +1,55 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { useRouter } from "next/navigation";
+import { submitFeedback } from "./actions";
+
+export function FeedbackForm({ submissionId }: { submissionId: string }) {
+  const [text, setText] = useState("");
+  const [pending, startTransition] = useTransition();
+  const router = useRouter();
+
+  function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!text.trim()) return;
+    startTransition(async () => {
+      await submitFeedback(submissionId, text.trim());
+      router.push("/curator/homework");
+    });
+  }
+
+  return (
+    <form onSubmit={handleSubmit} className="space-y-3">
+      <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+        Написать фидбек
+      </p>
+      <textarea
+        value={text}
+        onChange={(e) => setText(e.target.value)}
+        required
+        placeholder="Напишите обратную связь студенту..."
+        style={{
+          border: "2px solid var(--border)",
+          background: "var(--background)",
+          outline: "none",
+          width: "100%",
+          padding: "0.5rem 0.75rem",
+          fontSize: "0.875rem",
+          fontFamily: "inherit",
+          resize: "vertical",
+          minHeight: "120px",
+        }}
+        onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+        onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+      />
+      <button
+        type="submit"
+        disabled={pending || !text.trim()}
+        className="btn-aubade btn-aubade-accent px-5 py-2 text-sm"
+        style={{ opacity: pending || !text.trim() ? 0.6 : 1 }}
+      >
+        {pending ? "Отправка..." : "Отправить фидбек"}
+      </button>
+    </form>
+  );
+}

src/app/curator/homework/[submissionId]/page.tsx

@@ -0,0 +1,132 @@
+import { prisma } from "@/lib/prisma";
+import { notFound } from "next/navigation";
+import Link from "next/link";
+import { FeedbackForm } from "./feedback-form";
+
+interface Props {
+  params: Promise<{ submissionId: string }>;
+}
+
+function formatSize(bytes: number) {
+  if (bytes < 1024) return `${bytes} Б`;
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} КБ`;
+  return `${(bytes / 1024 / 1024).toFixed(1)} МБ`;
+}
+
+export default async function SubmissionPage({ params }: Props) {
+  const { submissionId } = await params;
+
+  const submission = await prisma.homeworkSubmission.findUnique({
+    where: { id: submissionId },
+    include: {
+      user: { select: { name: true, email: true } },
+      feedbacks: {
+        include: { curator: { select: { name: true } } },
+        orderBy: { createdAt: "desc" },
+      },
+      homework: {
+        include: {
+          lesson: {
+            select: {
+              title: true,
+              module: { select: { title: true, course: { select: { title: true } } } },
+            },
+          },
+        },
+      },
+    },
+  });
+
+  if (!submission) notFound();
+
+  const files = (submission.files as { name: string; url: string; size: number }[]) ?? [];
+  const isReviewed = submission.feedbacks.length > 0;
+
+  return (
+    <div className="p-8 max-w-2xl">
+      <nav className="text-xs mb-6 uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+        <Link href="/curator/homework" className="hover:underline">ДЗ на проверку</Link>
+        <span className="mx-2">/</span>
+        <span style={{ color: "var(--foreground)" }}>{submission.user.name}</span>
+      </nav>
+
+      {/* Meta */}
+      <div className="mb-6">
+        <h1 className="text-xl font-bold">{submission.homework.lesson.title}</h1>
+        <p className="text-sm mt-1" style={{ color: "var(--muted-foreground)" }}>
+          {submission.homework.lesson.module.course.title} · {submission.homework.lesson.module.title}
+        </p>
+      </div>
+
+      {/* Student info */}
+      <div className="flex items-center justify-between px-4 py-3 mb-6" style={{ border: "2px solid var(--border)", background: "var(--color-surface)" }}>
+        <div>
+          <p className="font-medium text-sm">{submission.user.name}</p>
+          <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>{submission.user.email}</p>
+        </div>
+        <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+          Сдано {new Date(submission.submittedAt).toLocaleDateString("ru-RU")}
+        </p>
+      </div>
+
+      {/* Homework description */}
+      <div className="mb-4">
+        <p className="text-xs font-bold uppercase tracking-widest mb-2" style={{ color: "var(--muted-foreground)" }}>Задание</p>
+        <div className="px-4 py-3 text-sm whitespace-pre-wrap" style={{ border: "2px solid var(--border)", background: "var(--color-surface)" }}>
+          {submission.homework.description}
+        </div>
+      </div>
+
+      {/* Student answer */}
+      <div className="mb-4">
+        <p className="text-xs font-bold uppercase tracking-widest mb-2" style={{ color: "var(--muted-foreground)" }}>Ответ студента</p>
+        {submission.text ? (
+          <div className="px-4 py-3 text-sm whitespace-pre-wrap" style={{ border: "2px solid var(--border)" }}>
+            {submission.text}
+          </div>
+        ) : (
+          <p className="text-sm italic" style={{ color: "var(--muted-foreground)" }}>Текст не добавлен</p>
+        )}
+      </div>
+
+      {/* Files */}
+      {files.length > 0 && (
+        <div className="mb-6">
+          <p className="text-xs font-bold uppercase tracking-widest mb-2" style={{ color: "var(--muted-foreground)" }}>Прикреплённые файлы</p>
+          <div className="space-y-1">
+            {files.map((f) => (
+              <a
+                key={f.url}
+                href={f.url}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="flex items-center gap-3 px-3 py-2 text-sm"
+                style={{ border: "2px solid var(--border)" }}
+              >
+                <span>📎</span>
+                <span className="flex-1 underline">{f.name}</span>
+                <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>{formatSize(f.size)}</span>
+              </a>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Existing feedback */}
+      {submission.feedbacks.map((fb) => (
+        <div key={fb.id} className="mb-4 px-4 py-3" style={{ border: "2px solid var(--foreground)", background: "var(--accent)" }}>
+          <div className="flex items-center justify-between mb-1">
+            <p className="text-xs font-bold uppercase tracking-widest">Фидбек</p>
+            <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+              {fb.curator.name} · {new Date(fb.createdAt).toLocaleDateString("ru-RU")}
+            </span>
+          </div>
+          <p className="text-sm whitespace-pre-wrap">{fb.text}</p>
+        </div>
+      ))}
+
+      {/* Feedback form */}
+      {!isReviewed && <FeedbackForm submissionId={submissionId} />}
+    </div>
+  );
+}

src/app/curator/homework/page.tsx

@@ -0,0 +1,194 @@
+import { prisma } from "@/lib/prisma";
+import Link from "next/link";
+import { HomeworkFilters } from "@/components/admin/homework-filters";
+import { Suspense } from "react";
+
+const PAGE_SIZE = 20;
+
+interface Props {
+  searchParams: Promise<{
+    search?: string;
+    status?: string;
+    courseId?: string;
+    page?: string;
+  }>;
+}
+
+export default async function HomeworkListPage({ searchParams }: Props) {
+  const { search = "", status = "", courseId = "", page = "1" } = await searchParams;
+  const currentPage = Math.max(1, parseInt(page) || 1);
+  const skip = (currentPage - 1) * PAGE_SIZE;
+
+  // Build where clause
+  const where = {
+    ...(search
+      ? {
+          user: {
+            OR: [
+              { name: { contains: search, mode: "insensitive" as const } },
+              { email: { contains: search, mode: "insensitive" as const } },
+            ],
+          },
+        }
+      : {}),
+    ...(courseId
+      ? {
+          homework: {
+            lesson: { module: { courseId } },
+          },
+        }
+      : {}),
+    ...(status === "pending" ? { feedbacks: { none: {} } } : {}),
+    ...(status === "reviewed" ? { feedbacks: { some: {} } } : {}),
+  };
+
+  const [submissions, total, courses] = await Promise.all([
+    prisma.homeworkSubmission.findMany({
+      where,
+      orderBy: { submittedAt: "desc" },
+      skip,
+      take: PAGE_SIZE,
+      include: {
+        user: { select: { name: true, email: true } },
+        feedbacks: { select: { id: true } },
+        homework: {
+          include: {
+            lesson: {
+              select: {
+                title: true,
+                module: { select: { title: true, course: { select: { id: true, title: true } } } },
+              },
+            },
+          },
+        },
+      },
+    }),
+    prisma.homeworkSubmission.count({ where }),
+    prisma.course.findMany({ orderBy: { title: "asc" }, select: { id: true, title: true } }),
+  ]);
+
+  const totalPages = Math.ceil(total / PAGE_SIZE);
+
+  const pendingCount = submissions.filter((s) => s.feedbacks.length === 0).length;
+
+  function pageUrl(p: number) {
+    const params = new URLSearchParams();
+    if (search) params.set("search", search);
+    if (status) params.set("status", status);
+    if (courseId) params.set("courseId", courseId);
+    params.set("page", String(p));
+    return `/curator/homework?${params.toString()}`;
+  }
+
+  return (
+    <div className="p-8 max-w-3xl">
+      <div className="mb-6">
+        <h1
+          className="text-xs font-bold uppercase tracking-widest"
+          style={{ color: "var(--muted-foreground)" }}
+        >
+          Домашние задания
+        </h1>
+        <p className="text-sm mt-1" style={{ color: "var(--muted-foreground)" }}>
+          {total} {total === 1 ? "работа" : "работ"} · {pendingCount} ожидают проверки
+        </p>
+      </div>
+
+      <Suspense>
+        <HomeworkFilters courses={courses} />
+      </Suspense>
+
+      {submissions.length === 0 ? (
+        <div className="card-aubade p-10 text-center">
+          <p className="text-3xl mb-2">📭</p>
+          <p className="font-bold">Ничего не найдено</p>
+          <p className="text-sm mt-1" style={{ color: "var(--muted-foreground)" }}>
+            Попробуйте изменить фильтры
+          </p>
+        </div>
+      ) : (
+        <div className="space-y-1.5">
+          {submissions.map((s) => {
+            const isPending = s.feedbacks.length === 0;
+            return (
+              <Link
+                key={s.id}
+                href={`/curator/homework/${s.id}`}
+                className="flex items-center gap-4 px-4 py-3 text-sm transition-opacity hover:opacity-80"
+                style={{
+                  border: `2px solid ${isPending ? "var(--foreground)" : "var(--border)"}`,
+                  display: "flex",
+                }}
+              >
+                <div className="flex-1 min-w-0">
+                  <p className="font-medium truncate">{s.user.name}</p>
+                  <p className="text-xs truncate" style={{ color: "var(--muted-foreground)" }}>
+                    {s.homework.lesson.module.course.title} · {s.homework.lesson.title}
+                  </p>
+                  <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                    {s.user.email}
+                  </p>
+                </div>
+                <div className="text-right shrink-0">
+                  <span
+                    className="text-xs px-2 py-0.5"
+                    style={{
+                      border: "1px solid var(--border)",
+                      background: isPending ? "var(--foreground)" : "transparent",
+                      color: isPending ? "var(--background)" : "var(--muted-foreground)",
+                    }}
+                  >
+                    {isPending ? "Новое" : "Проверено"}
+                  </span>
+                  <p className="text-xs mt-1" style={{ color: "var(--muted-foreground)" }}>
+                    {new Date(s.submittedAt).toLocaleDateString("ru-RU")}
+                  </p>
+                </div>
+              </Link>
+            );
+          })}
+        </div>
+      )}
+
+      {/* Pagination */}
+      {totalPages > 1 && (
+        <div className="flex items-center gap-1 mt-5">
+          {currentPage > 1 && (
+            <Link href={pageUrl(currentPage - 1)} className="btn-aubade px-3 py-1 text-xs">←</Link>
+          )}
+          {Array.from({ length: totalPages }, (_, i) => i + 1)
+            .filter((p) => p === 1 || p === totalPages || Math.abs(p - currentPage) <= 2)
+            .reduce<(number | "…")[]>((acc, p, i, arr) => {
+              if (i > 0 && (p as number) - (arr[i - 1] as number) > 1) acc.push("…");
+              acc.push(p);
+              return acc;
+            }, [])
+            .map((p, i) =>
+              p === "…" ? (
+                <span key={`e${i}`} className="px-2 text-xs" style={{ color: "var(--muted-foreground)" }}>…</span>
+              ) : (
+                <Link
+                  key={p}
+                  href={pageUrl(p as number)}
+                  className="px-3 py-1 text-xs"
+                  style={{
+                    border: "2px solid var(--border)",
+                    background: p === currentPage ? "var(--foreground)" : "transparent",
+                    color: p === currentPage ? "var(--background)" : "var(--foreground)",
+                  }}
+                >
+                  {p}
+                </Link>
+              )
+            )}
+          {currentPage < totalPages && (
+            <Link href={pageUrl(currentPage + 1)} className="btn-aubade px-3 py-1 text-xs">→</Link>
+          )}
+          <span className="ml-2 text-xs" style={{ color: "var(--muted-foreground)" }}>
+            стр. {currentPage} из {totalPages}
+          </span>
+        </div>
+      )}
+    </div>
+  );
+}

src/app/curator/layout.tsx

@@ -0,0 +1,61 @@
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import Link from "next/link";
+import { LogoutButton } from "@/components/layout/logout-button";
+import { AdminShell } from "@/components/admin/admin-shell";
+import { getSetting } from "@/lib/settings";
+
+export default async function CuratorLayout({ children }: { children: React.ReactNode }) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) redirect("/login");
+  if (session.user.role !== "curator" && session.user.role !== "admin") redirect("/dashboard");
+
+  // Maintenance mode: curators (non-admin) see the maintenance page
+  if (session.user.role === "curator") {
+    const maintenance = await getSetting("maintenanceMode");
+    if (maintenance === "true") redirect("/maintenance");
+  }
+
+  // Admin uses the admin shell with sidebar
+  if (session.user.role === "admin") {
+    return <AdminShell userName={session.user.name}>{children}</AdminShell>;
+  }
+
+  return (
+    <div className="min-h-screen flex" style={{ backgroundColor: "var(--background)" }}>
+      {/* Sidebar */}
+      <aside className="w-52 shrink-0 flex flex-col min-h-screen" style={{ backgroundColor: "var(--sidebar-bg)" }}>
+        <div className="px-5 py-5" style={{ borderBottom: "1px solid rgba(255,255,255,0.08)" }}>
+          <p className="text-sm font-bold tracking-wide" style={{ color: "#F5F5F0" }}>Second Brain</p>
+          <p className="text-xs mt-0.5 uppercase tracking-widest" style={{ color: "#888" }}>Куратор</p>
+        </div>
+        <nav className="flex-1 py-3 space-y-0.5 px-2">
+          <NavLink href="/curator/dashboard">Обзор</NavLink>
+          <NavLink href="/curator/homework">ДЗ на проверку</NavLink>
+        </nav>
+        <div className="px-4 py-4" style={{ borderTop: "1px solid rgba(255,255,255,0.08)" }}>
+          <p className="text-xs mb-2 truncate" style={{ color: "#888" }}>{session.user.name}</p>
+          <LogoutButton />
+        </div>
+      </aside>
+
+      {/* Content */}
+      <main className="flex-1 overflow-auto">
+        {children}
+      </main>
+    </div>
+  );
+}
+
+function NavLink({ href, children }: { href: string; children: React.ReactNode }) {
+  return (
+    <Link
+      href={href}
+      className="block px-3 py-2 text-sm rounded-sm transition-colors"
+      style={{ color: "#CCCCCC" }}
+    >
+      {children}
+    </Link>
+  );
+}

src/app/globals.css

@@ -1,26 +1,173 @@
 @import "tailwindcss";
+@import "tw-animate-css";
+@import "shadcn/tailwind.css";
+@plugin "@tailwindcss/typography";
 
-:root {
-  --background: #ffffff;
-  --foreground: #171717;
-}
+@custom-variant dark (&:is(.dark *));
 
+/* ── Second Brain brand tokens ─────────────────────────────────────── */
 @theme inline {
+  --font-sans: var(--font-fira), ui-monospace, monospace;
+  --font-mono: var(--font-fira), ui-monospace, monospace;
+
   --color-background: var(--background);
   --color-foreground: var(--foreground);
-  --font-sans: var(--font-geist-sans);
-  --font-mono: var(--font-geist-mono);
+  --color-card: var(--card);
+  --color-card-foreground: var(--card-foreground);
+  --color-primary: var(--primary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-secondary: var(--secondary);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-muted: var(--muted);
+  --color-muted-foreground: var(--muted-foreground);
+  --color-accent: var(--accent);
+  --color-accent-foreground: var(--accent-foreground);
+  --color-destructive: var(--destructive);
+  --color-border: var(--border);
+  --color-input: var(--input);
+  --color-ring: var(--ring);
+  --color-popover: var(--popover);
+  --color-popover-foreground: var(--popover-foreground);
+
+  --radius-sm: calc(var(--radius) * 0.6);
+  --radius-md: calc(var(--radius) * 0.8);
+  --radius-lg: var(--radius);
+  --radius-xl: calc(var(--radius) * 1.4);
+  --radius-2xl: calc(var(--radius) * 1.8);
 }
 
-@media (prefers-color-scheme: dark) {
-  :root {
-    --background: #0a0a0a;
-    --foreground: #ededed;
+/* ── Light mode: Second Brain palette ──────────────────────────────── */
+:root {
+  --background:         #F5F5F0;
+  --foreground:         #323232;
+  --card:               #F5F5F0;
+  --card-foreground:    #323232;
+  --popover:            #F5F5F0;
+  --popover-foreground: #323232;
+  --primary:            #323232;
+  --primary-foreground: #F5F5F0;
+  --secondary:          #E8E8E0;
+  --secondary-foreground: #323232;
+  --muted:              #E8E8E0;
+  --muted-foreground:   #666666;
+  --accent:             #E8F0D8;
+  --accent-foreground:  #323232;
+  --destructive:        oklch(0.577 0.245 27.325);
+  --border:             #AAAAAA;
+  --input:              #AAAAAA;
+  --ring:               #323232;
+  --radius:             2px;
+
+  /* Aubade */
+  --aubade-thickness:    2px;
+  --aubade-shadow-offset: 4px;
+  --color-divider:       #AAAAAA;
+  --color-hover:         #D8D8D0;
+  --color-surface:       #E8E8E0;
+  --color-highlight:     #E8F0D8;
+
+  /* Admin sidebar */
+  --sidebar-bg:         #2A2A28;
+  --sidebar-surface:    #1E1E1C;
+  --sidebar-text:       #b3b3b3;
+  --sidebar-border:     #4A4A48;
+  --sidebar-highlight:  #2A3A2A;
+}
+
+/* ── Base ────────────────────────────────────────────────────────────── */
+@layer base {
+  * {
+    @apply border-border outline-ring/50;
+    box-sizing: border-box;
+  }
+  html {
+    font-family: var(--font-sans);
+    font-size: 16px;
+  }
+  body {
+    background-color: var(--background);
+    color: var(--foreground);
   }
 }
 
-body {
-  background: var(--background);
-  color: var(--foreground);
-  font-family: Arial, Helvetica, sans-serif;
+/* ── Aubade utility classes ─────────────────────────────────────────── */
+.card-aubade {
+  border: var(--aubade-thickness) solid var(--color-divider);
+  box-shadow: var(--aubade-shadow-offset) var(--aubade-shadow-offset) 0 0 var(--color-divider);
+  background-color: var(--background);
+  transition: transform 0.1s ease, box-shadow 0.1s ease;
+}
+.card-aubade:hover {
+  transform: translate(-2px, -2px);
+  box-shadow: 6px 6px 0 0 var(--color-divider);
+}
+
+.btn-aubade {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 6px 16px;
+  font-family: var(--font-sans);
+  font-size: 0.875rem;
+  font-weight: 500;
+  border: var(--aubade-thickness) solid var(--foreground);
+  box-shadow: var(--aubade-shadow-offset) var(--aubade-shadow-offset) 0 0 var(--foreground);
+  background-color: var(--background);
+  color: var(--foreground);
+  cursor: pointer;
+  transition: transform 0.1s ease, box-shadow 0.1s ease;
+  text-decoration: none;
+}
+.btn-aubade:hover {
+  transform: translate(-2px, -2px);
+  box-shadow: 6px 6px 0 0 var(--foreground);
+}
+.btn-aubade:active {
+  transform: translate(2px, 2px);
+  box-shadow: none;
+}
+
+.btn-aubade-accent {
+  background-color: var(--color-highlight);
+  border-color: var(--foreground);
+  box-shadow: var(--aubade-shadow-offset) var(--aubade-shadow-offset) 0 0 var(--foreground);
+}
+
+.tag-aubade {
+  background-color: var(--color-surface);
+  border: var(--aubade-thickness) solid transparent;
+  padding: 2px 8px;
+  font-size: 0.65rem;
+  text-transform: uppercase;
+  letter-spacing: 0.1em;
+  font-weight: 700;
+  transition: border-color 0.15s ease;
+  font-family: var(--font-sans);
+}
+.tag-aubade:hover {
+  border-color: var(--foreground);
+}
+
+/* Admin sidebar (dark) */
+.admin-sidebar {
+  background-color: var(--sidebar-bg);
+  color: var(--sidebar-text);
+}
+.admin-sidebar-nav-link {
+  display: block;
+  padding: 8px 12px;
+  font-size: 0.875rem;
+  color: var(--sidebar-text);
+  text-decoration: none;
+  border-left: 2px solid transparent;
+  transition: color 0.15s, border-color 0.15s, background-color 0.15s;
+}
+.admin-sidebar-nav-link:hover {
+  color: #F5F5F0;
+  background-color: var(--sidebar-surface);
+}
+.admin-sidebar-nav-link.active {
+  color: #E8F0D8;
+  border-left-color: #E8F0D8;
+  background-color: var(--sidebar-surface);
 }

src/app/layout.tsx

@@ -1,33 +1,42 @@
 import type { Metadata } from "next";
-import { Geist, Geist_Mono } from "next/font/google";
+import { Fira_Mono } from "next/font/google";
 import "./globals.css";
+import { getSettings } from "@/lib/settings";
 
-const geistSans = Geist({
-  variable: "--font-geist-sans",
-  subsets: ["latin"],
+const firaMono = Fira_Mono({
+  weight: ["400", "500", "700"],
+  subsets: ["latin", "cyrillic"],
+  variable: "--font-fira",
+  display: "swap",
 });
 
-const geistMono = Geist_Mono({
-  variable: "--font-geist-mono",
-  subsets: ["latin"],
-});
+export async function generateMetadata(): Promise<Metadata> {
+  const settings = await getSettings();
+  return {
+    title: `${settings.schoolName} — Обучение`,
+    description: settings.schoolDescription || "Образовательная платформа",
+    keywords: settings.schoolKeywords || undefined,
+  };
+}
 
-export const metadata: Metadata = {
-  title: "Create Next App",
-  description: "Generated by create next app",
-};
-
-export default function RootLayout({
+export default async function RootLayout({
   children,
 }: Readonly<{
   children: React.ReactNode;
 }>) {
+  const settings = await getSettings();
+
   return (
-    <html
-      lang="en"
-      className={`${geistSans.variable} ${geistMono.variable} h-full antialiased`}
-    >
-      <body className="min-h-full flex flex-col">{children}</body>
+    <html lang="ru" className={`${firaMono.variable} h-full antialiased`}>
+      {settings.headCode ? (
+        <head dangerouslySetInnerHTML={{ __html: settings.headCode }} />
+      ) : null}
+      <body className="min-h-full flex flex-col">
+        {children}
+        {settings.bodyCode ? (
+          <div dangerouslySetInnerHTML={{ __html: settings.bodyCode }} />
+        ) : null}
+      </body>
     </html>
   );
 }

src/app/maintenance/page.tsx

@@ -0,0 +1,23 @@
+export default function MaintenancePage() {
+  return (
+    <div
+      className="min-h-screen flex items-center justify-center p-8"
+      style={{ backgroundColor: "var(--background)" }}
+    >
+      <div className="card-aubade p-10 max-w-md w-full text-center space-y-4">
+        <p
+          className="text-xs font-bold uppercase tracking-widest"
+          style={{ color: "var(--muted-foreground)" }}
+        >
+          Технические работы
+        </p>
+        <h1 className="text-2xl font-bold" style={{ color: "var(--foreground)" }}>
+          Скоро вернёмся
+        </h1>
+        <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>
+          Платформа временно недоступна. Мы проводим обновление — пожалуйста, зайдите позже.
+        </p>
+      </div>
+    </div>
+  );
+}

src/components/admin/admin-nav.tsx

@@ -0,0 +1,48 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+
+const links = [
+  { href: "/admin/dashboard", label: "Обзор" },
+  { href: "/admin/courses", label: "Курсы" },
+  { href: "/admin/categories", label: "Категории" },
+  { href: "/admin/users", label: "Пользователи" },
+  { href: "/curator/homework", label: "ДЗ на проверку" },
+  { href: "/admin/comments", label: "Комментарии" },
+  { href: "/admin/import-export", label: "Импорт / Экспорт" },
+  { href: "/admin/settings", label: "Настройки" },
+];
+
+export function AdminNav() {
+  const pathname = usePathname();
+
+  return (
+    <>
+      {links.map(({ href, label }) => {
+        const active =
+          pathname === href ||
+          (href !== "/admin/dashboard" && href !== "/curator/homework" && pathname.startsWith(href)) ||
+          (href === "/curator/homework" && pathname.startsWith("/curator"));
+        return (
+          <Link
+            key={href}
+            href={href}
+            className="admin-sidebar-nav-link"
+            style={
+              active
+                ? {
+                    color: "#E8F0D8",
+                    borderLeftColor: "#E8F0D8",
+                    backgroundColor: "var(--sidebar-surface)",
+                  }
+                : undefined
+            }
+          >
+            {label}
+          </Link>
+        );
+      })}
+    </>
+  );
+}

src/components/admin/admin-shell.tsx

@@ -0,0 +1,40 @@
+import { AdminNav } from "@/components/admin/admin-nav";
+import { LogoutButton } from "@/components/layout/logout-button";
+
+export function AdminShell({
+  children,
+  userName,
+}: {
+  children: React.ReactNode;
+  userName: string;
+}) {
+  return (
+    <div className="min-h-screen flex">
+      <aside
+        className="w-52 flex flex-col shrink-0 fixed h-full z-10"
+        style={{ backgroundColor: "var(--sidebar-bg)", color: "var(--sidebar-text)" }}
+      >
+        <div className="px-5 py-5" style={{ borderBottom: "2px solid var(--sidebar-border)" }}>
+          <p className="font-bold text-base tracking-wide" style={{ color: "#E8F0D8" }}>
+            Second Brain
+          </p>
+          <p className="text-xs mt-0.5 uppercase tracking-widest" style={{ color: "var(--sidebar-text)", fontSize: "0.6rem" }}>
+            Администратор
+          </p>
+        </div>
+        <nav className="flex-1 px-2 py-4 space-y-0.5 overflow-y-auto">
+          <AdminNav />
+        </nav>
+        <div className="px-4 py-4" style={{ borderTop: "2px solid var(--sidebar-border)" }}>
+          <p className="text-xs mb-3 truncate" style={{ color: "var(--sidebar-text)" }}>
+            {userName}
+          </p>
+          <LogoutButton />
+        </div>
+      </aside>
+      <div className="ml-52 flex-1 min-h-screen" style={{ backgroundColor: "var(--background)" }}>
+        {children}
+      </div>
+    </div>
+  );
+}

src/components/admin/category-row.tsx

@@ -0,0 +1,57 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { Input } from "@/components/ui/input";
+import { Button } from "@/components/ui/button";
+import { updateCategory, deleteCategory } from "@/app/admin/categories/actions";
+
+interface Props {
+  category: { id: string; title: string; slug: string };
+  courseCount: number;
+}
+
+export function CategoryRow({ category, courseCount }: Props) {
+  const [editing, setEditing] = useState(false);
+  const [pending, startTransition] = useTransition();
+
+  function handleUpdate(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    const fd = new FormData(e.currentTarget);
+    startTransition(() => updateCategory(category.id, fd));
+    setEditing(false);
+  }
+
+  function handleDelete() {
+    if (courseCount > 0) {
+      alert(`Нельзя удалить: к категории привязано ${courseCount} курсов`);
+      return;
+    }
+    if (!confirm(`Удалить категорию «${category.title}»?`)) return;
+    startTransition(() => deleteCategory(category.id));
+  }
+
+  return (
+    <div className="flex items-center gap-3 px-4 py-3" style={{ border: "2px solid var(--border)", background: "var(--background)" }}>
+      {editing ? (
+        <form onSubmit={handleUpdate} className="flex items-center gap-2 flex-1">
+          <Input name="title" defaultValue={category.title} required className="h-8 text-sm" />
+          <Input name="slug" defaultValue={category.slug} className="h-8 text-sm w-36" />
+          <Button type="submit" size="sm" disabled={pending}>Сохранить</Button>
+          <Button type="button" variant="ghost" size="sm" onClick={() => setEditing(false)}>✕</Button>
+        </form>
+      ) : (
+        <>
+          <span className="flex-1 font-medium" style={{ color: "var(--foreground)" }}>{category.title}</span>
+          <span className="text-xs font-mono" style={{ color: "var(--muted-foreground)" }}>/{category.slug}</span>
+          <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>{courseCount} курсов</span>
+          <button onClick={() => setEditing(true)} className="text-xs underline" style={{ color: "var(--muted-foreground)" }}>
+            Редакт.
+          </button>
+          <button onClick={handleDelete} disabled={pending} className="text-xs" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+            Удалить
+          </button>
+        </>
+      )}
+    </div>
+  );
+}

src/components/admin/comments-table.tsx

@@ -0,0 +1,134 @@
+"use client";
+
+import { useRouter, usePathname } from "next/navigation";
+import { useTransition } from "react";
+import { Trash2, Search } from "lucide-react";
+import Link from "next/link";
+import { adminDeleteComment } from "@/app/admin/comments/actions";
+
+type Comment = {
+  id: string;
+  text: string;
+  createdAt: Date;
+  user: { id: string; name: string; email: string };
+  lesson: {
+    id: string;
+    title: string;
+    module: { course: { slug: string; title: string } };
+  };
+};
+
+const inputStyle: React.CSSProperties = {
+  border: "2px solid var(--border)",
+  background: "var(--background)",
+  outline: "none",
+  padding: "0.4rem 0.75rem",
+  fontSize: "0.8rem",
+  fontFamily: "inherit",
+};
+
+export function CommentsTable({ comments, search }: { comments: Comment[]; search: string }) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const [pending, startTransition] = useTransition();
+
+  function updateSearch(value: string) {
+    const params = new URLSearchParams();
+    if (value) params.set("search", value);
+    startTransition(() => router.push(`${pathname}?${params.toString()}`));
+  }
+
+  function handleDelete(id: string) {
+    if (!confirm("Удалить комментарий?")) return;
+    startTransition(async () => {
+      await adminDeleteComment(id);
+    });
+  }
+
+  return (
+    <div>
+      {/* Search */}
+      <div className="flex gap-2 mb-4">
+        <div className="relative">
+          <Search size={13} className="absolute left-2.5 top-1/2 -translate-y-1/2" style={{ color: "var(--muted-foreground)" }} />
+          <input
+            defaultValue={search}
+            placeholder="Поиск по автору или тексту"
+            style={{ ...inputStyle, paddingLeft: "2rem", width: 260 }}
+            onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+            onBlur={(e) => {
+              e.currentTarget.style.borderColor = "var(--border)";
+              updateSearch(e.currentTarget.value.trim());
+            }}
+            onKeyDown={(e) => { if (e.key === "Enter") e.currentTarget.blur(); }}
+          />
+        </div>
+        {search && (
+          <button type="button" onClick={() => startTransition(() => router.push(pathname))}
+            className="text-xs px-3" style={{ border: "2px solid var(--border)", color: "var(--muted-foreground)" }}>
+            Сбросить
+          </button>
+        )}
+      </div>
+
+      {comments.length === 0 ? (
+        <div className="card-aubade p-10 text-center">
+          <p className="font-bold">Комментариев нет</p>
+        </div>
+      ) : (
+        <div style={{ border: "2px solid var(--border)" }}>
+          <table className="w-full text-sm">
+            <thead>
+              <tr style={{ borderBottom: "2px solid var(--border)", background: "var(--background)" }}>
+                {["Автор", "Урок", "Комментарий", "Дата", ""].map((h) => (
+                  <th key={h} className="text-left px-4 py-2.5 text-xs font-bold uppercase tracking-widest"
+                    style={{ color: "var(--muted-foreground)" }}>{h}</th>
+                ))}
+              </tr>
+            </thead>
+            <tbody>
+              {comments.map((c) => {
+                const lessonUrl = `/courses/${c.lesson.module.course.slug}/lessons/${c.lesson.id}`;
+                return (
+                  <tr key={c.id} style={{ borderBottom: "1px solid var(--border)", opacity: pending ? 0.6 : 1 }}>
+                    <td className="px-4 py-3 whitespace-nowrap">
+                      <Link href={`/admin/users/${c.user.id}`} className="font-medium hover:underline text-sm">
+                        {c.user.name}
+                      </Link>
+                      <p className="text-xs font-mono" style={{ color: "var(--muted-foreground)" }}>{c.user.email}</p>
+                    </td>
+                    <td className="px-4 py-3">
+                      <Link href={lessonUrl} className="text-xs hover:underline" target="_blank">
+                        {c.lesson.title}
+                      </Link>
+                      <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                        {c.lesson.module.course.title}
+                      </p>
+                    </td>
+                    <td className="px-4 py-3 max-w-xs">
+                      <p className="text-xs line-clamp-2" style={{ color: "var(--foreground)" }}>{c.text}</p>
+                    </td>
+                    <td className="px-4 py-3 whitespace-nowrap text-xs" style={{ color: "var(--muted-foreground)" }}>
+                      {new Date(c.createdAt).toLocaleString("ru-RU", { day: "2-digit", month: "2-digit", hour: "2-digit", minute: "2-digit" })}
+                    </td>
+                    <td className="px-4 py-3">
+                      <button
+                        type="button"
+                        onClick={() => handleDelete(c.id)}
+                        title="Удалить"
+                        className="p-1.5 transition-opacity hover:opacity-60"
+                        style={{ color: "oklch(0.577 0.245 27.325)" }}
+                      >
+                        <Trash2 size={14} />
+                      </button>
+                    </td>
+                  </tr>
+                );
+              })}
+            </tbody>
+          </table>
+        </div>
+      )}
+    </div>
+  );
+}

src/components/admin/course-edit-form.tsx

@@ -0,0 +1,124 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { Textarea } from "@/components/ui/textarea";
+import { Button } from "@/components/ui/button";
+import { updateCourse, deleteCourse } from "@/app/admin/courses/actions";
+
+interface Course {
+  id: string;
+  title: string;
+  slug: string;
+  description: string | null;
+  coverImage: string | null;
+  published: boolean;
+  categoryId: string | null;
+}
+
+interface Category {
+  id: string;
+  title: string;
+}
+
+export function CourseEditForm({ course, categories = [] }: { course: Course; categories?: Category[] }) {
+  const [published, setPublished] = useState(course.published);
+  const [coverImage, setCoverImage] = useState(course.coverImage ?? "");
+  const [categoryId, setCategoryId] = useState(course.categoryId ?? "");
+  const [uploading, setUploading] = useState(false);
+  const [pending, startTransition] = useTransition();
+
+  async function handleImageUpload(e: React.ChangeEvent<HTMLInputElement>) {
+    const file = e.target.files?.[0];
+    if (!file) return;
+    setUploading(true);
+    const fd = new FormData();
+    fd.append("file", file);
+    const res = await fetch("/api/admin/upload", { method: "POST", body: fd });
+    const data = await res.json();
+    if (data.url) setCoverImage(data.url);
+    setUploading(false);
+  }
+
+  function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    const fd = new FormData(e.currentTarget);
+    fd.set("published", String(published));
+    fd.set("coverImage", coverImage);
+    fd.set("categoryId", categoryId);
+    startTransition(() => updateCourse(course.id, fd));
+  }
+
+  function handleDelete() {
+    if (!confirm("Удалить курс? Это действие нельзя отменить.")) return;
+    startTransition(() => deleteCourse(course.id));
+  }
+
+  return (
+    <form onSubmit={handleSubmit} className="space-y-4">
+      <div className="grid grid-cols-2 gap-4">
+        <div className="space-y-1.5">
+          <Label htmlFor="title">Название</Label>
+          <Input id="title" name="title" defaultValue={course.title} required />
+        </div>
+        <div className="space-y-1.5">
+          <Label htmlFor="slug">Slug</Label>
+          <Input id="slug" name="slug" defaultValue={course.slug} required />
+        </div>
+      </div>
+      <div className="space-y-1.5">
+        <Label htmlFor="description">Описание</Label>
+        <Textarea id="description" name="description" defaultValue={course.description ?? ""} rows={3} />
+      </div>
+      {categories.length > 0 && (
+        <div className="space-y-1.5">
+          <Label htmlFor="categoryId">Категория</Label>
+          <select
+            id="categoryId"
+            value={categoryId}
+            onChange={(e) => setCategoryId(e.target.value)}
+            className="w-full px-3 py-2 text-sm bg-transparent"
+            style={{ border: "2px solid var(--border)", color: "var(--foreground)", fontFamily: "var(--font-sans)" }}
+          >
+            <option value="">Без категории</option>
+            {categories.map((c) => (
+              <option key={c.id} value={c.id}>{c.title}</option>
+            ))}
+          </select>
+        </div>
+      )}
+      <div className="space-y-1.5">
+        <Label>Обложка</Label>
+        <div className="flex items-center gap-3">
+          {coverImage && (
+            // eslint-disable-next-line @next/next/no-img-element
+            <img src={coverImage} alt="cover" className="w-16 h-10 object-cover rounded-md border" />
+          )}
+          <Input type="file" accept="image/*" onChange={handleImageUpload} disabled={uploading} className="max-w-xs" />
+          {uploading && <span className="text-sm text-slate-400">Загрузка...</span>}
+        </div>
+      </div>
+      <div className="flex items-center gap-2">
+        <button
+          type="button"
+          role="switch"
+          aria-checked={published}
+          onClick={() => setPublished(!published)}
+          className={`relative w-10 h-6 rounded-full transition-colors ${published ? "bg-green-500" : "bg-slate-300"}`}
+        >
+          <span className={`absolute top-1 left-1 w-4 h-4 bg-white rounded-full shadow transition-transform ${published ? "translate-x-4" : ""}`} />
+        </button>
+        <span className="text-sm text-slate-600">{published ? "Опубликован" : "Черновик"}</span>
+      </div>
+      <div className="flex justify-between pt-2">
+        <Button type="button" variant="destructive" onClick={handleDelete} disabled={pending}>
+          Удалить курс
+        </Button>
+        <Button type="submit" disabled={pending || uploading}>
+          {pending ? "Сохранение..." : "Сохранить"}
+        </Button>
+      </div>
+    </form>
+  );
+}

src/components/admin/course-tree.tsx

@@ -0,0 +1,173 @@
+"use client";
+
+import { useState } from "react";
+import Link from "next/link";
+import { ChevronDown, ChevronRight, Video, FileText, Eye, EyeOff } from "lucide-react";
+
+type Lesson = {
+  id: string;
+  title: string;
+  published: boolean;
+  kinescopeId: string | null;
+};
+
+type Module = {
+  id: string;
+  title: string;
+  description: string | null;
+  lessons: Lesson[];
+};
+
+export function CourseTree({
+  courseId,
+  modules,
+}: {
+  courseId: string;
+  modules: Module[];
+}) {
+  // All modules expanded by default
+  const [expanded, setExpanded] = useState<Set<string>>(
+    () => new Set(modules.map((m) => m.id))
+  );
+
+  function toggle(id: string) {
+    setExpanded((prev) => {
+      const next = new Set(prev);
+      next.has(id) ? next.delete(id) : next.add(id);
+      return next;
+    });
+  }
+
+  const totalLessons = modules.reduce((s, m) => s + m.lessons.length, 0);
+  const publishedLessons = modules.reduce(
+    (s, m) => s + m.lessons.filter((l) => l.published).length,
+    0
+  );
+
+  return (
+    <div>
+      {/* Summary bar */}
+      <div className="flex items-center gap-4 mb-4 text-xs" style={{ color: "var(--muted-foreground)" }}>
+        <span>{modules.length} модулей · {totalLessons} уроков</span>
+        <span
+          className="px-2 py-0.5"
+          style={{ border: "1px solid var(--border)" }}
+        >
+          <Eye size={10} className="inline mr-1" />
+          {publishedLessons} / {totalLessons} опубликовано
+        </span>
+        <button
+          type="button"
+          className="hover:underline"
+          onClick={() => setExpanded(new Set(modules.map((m) => m.id)))}
+        >
+          Развернуть все
+        </button>
+        <button
+          type="button"
+          className="hover:underline"
+          onClick={() => setExpanded(new Set())}
+        >
+          Свернуть все
+        </button>
+      </div>
+
+      <div className="space-y-1">
+        {modules.map((mod, mi) => {
+          const isOpen = expanded.has(mod.id);
+          const modPublished = mod.lessons.filter((l) => l.published).length;
+          return (
+            <div key={mod.id} style={{ border: "2px solid var(--border)" }}>
+              {/* Module header */}
+              <button
+                type="button"
+                onClick={() => toggle(mod.id)}
+                className="w-full flex items-center gap-2 px-4 py-2.5 text-left"
+                style={{ background: "var(--background)" }}
+              >
+                <span style={{ color: "var(--muted-foreground)", width: 16, flexShrink: 0 }}>
+                  {isOpen ? <ChevronDown size={14} /> : <ChevronRight size={14} />}
+                </span>
+                <span className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)", minWidth: 20 }}>
+                  {mi + 1}
+                </span>
+                <span className="flex-1 font-medium text-sm">{mod.title}</span>
+                {mod.description && (
+                  <span className="text-xs hidden sm:block max-w-xs truncate" style={{ color: "var(--muted-foreground)" }}>
+                    {mod.description}
+                  </span>
+                )}
+                <span className="text-xs shrink-0" style={{ color: "var(--muted-foreground)" }}>
+                  {modPublished}/{mod.lessons.length} уроков
+                </span>
+                <Link
+                  href={`/admin/courses/${courseId}/modules/${mod.id}`}
+                  onClick={(e) => e.stopPropagation()}
+                  className="text-xs shrink-0 hover:underline ml-2"
+                  style={{ color: "var(--muted-foreground)" }}
+                >
+                  Редактировать →
+                </Link>
+              </button>
+
+              {/* Lessons list */}
+              {isOpen && (
+                <div style={{ borderTop: "1px solid var(--border)" }}>
+                  {mod.lessons.length === 0 ? (
+                    <p className="px-10 py-2 text-xs" style={{ color: "var(--muted-foreground)" }}>
+                      Уроков нет
+                    </p>
+                  ) : (
+                    mod.lessons.map((lesson, li) => (
+                      <div
+                        key={lesson.id}
+                        className="flex items-center gap-2 px-4 py-1.5"
+                        style={{
+                          borderTop: li > 0 ? "1px solid var(--border)" : undefined,
+                          background: "var(--background)",
+                        }}
+                      >
+                        {/* Indent */}
+                        <span className="w-5 shrink-0" />
+                        {/* Index */}
+                        <span className="text-xs w-6 shrink-0 text-right" style={{ color: "var(--muted-foreground)" }}>
+                          {li + 1}
+                        </span>
+                        {/* Published indicator */}
+                        <span
+                          className="shrink-0"
+                          title={lesson.published ? "Опубликован" : "Черновик"}
+                          style={{ color: lesson.published ? "#3A6A3A" : "var(--muted-foreground)" }}
+                        >
+                          {lesson.published ? <Eye size={13} /> : <EyeOff size={13} />}
+                        </span>
+                        {/* Kinescope indicator */}
+                        <span
+                          className="shrink-0"
+                          title={lesson.kinescopeId ? "Видео прикреплено" : "Без видео"}
+                          style={{ color: lesson.kinescopeId ? "#3A6A3A" : "var(--border)" }}
+                        >
+                          {lesson.kinescopeId ? <Video size={13} /> : <FileText size={13} />}
+                        </span>
+                        {/* Title */}
+                        <span className="flex-1 text-sm truncate">{lesson.title}</span>
+                        {/* Edit link */}
+                        <Link
+                          href={`/admin/courses/${courseId}/modules/${mod.id}/lessons/${lesson.id}`}
+                          className="text-xs shrink-0 hover:underline"
+                          style={{ color: "var(--muted-foreground)" }}
+                        >
+                          Ред. →
+                        </Link>
+                      </div>
+                    ))
+                  )}
+                </div>
+              )}
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}

src/components/admin/create-course-dialog.tsx

@@ -0,0 +1,52 @@
+"use client";
+
+import { useState } from "react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { Textarea } from "@/components/ui/textarea";
+import {
+  Dialog,
+  DialogContent,
+  DialogHeader,
+  DialogTitle,
+  DialogTrigger,
+} from "@/components/ui/dialog";
+import { createCourse } from "@/app/admin/courses/actions";
+
+export function CreateCourseDialog() {
+  const [open, setOpen] = useState(false);
+
+  return (
+    <Dialog open={open} onOpenChange={setOpen}>
+      <DialogTrigger className="inline-flex items-center justify-center gap-2 rounded-md text-sm font-medium bg-primary text-primary-foreground shadow-xs hover:bg-primary/90 h-9 px-4 py-2 cursor-pointer">
+        + Создать курс
+      </DialogTrigger>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>Новый курс</DialogTitle>
+        </DialogHeader>
+        <form action={createCourse} className="space-y-4">
+          <div className="space-y-1.5">
+            <Label htmlFor="title">Название</Label>
+            <Input id="title" name="title" placeholder="Obsidian PKM" required />
+          </div>
+          <div className="space-y-1.5">
+            <Label htmlFor="slug">Slug (URL)</Label>
+            <Input id="slug" name="slug" placeholder="obsidian-pkm (авто если пусто)" />
+          </div>
+          <div className="space-y-1.5">
+            <Label htmlFor="description">Описание</Label>
+            <Textarea id="description" name="description" placeholder="Краткое описание курса" rows={3} />
+          </div>
+          <div className="flex justify-end gap-2">
+            <Button type="button" variant="outline" onClick={() => setOpen(false)}>
+              Отмена
+            </Button>
+            <Button type="submit">Создать</Button>
+          </div>
+        </form>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/components/admin/create-user-form.tsx

@@ -0,0 +1,226 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { useRouter } from "next/navigation";
+import { Eye, EyeOff, RefreshCw } from "lucide-react";
+import { createUser } from "@/app/admin/users/actions";
+
+const ROLES = [
+  { value: "student", label: "Ученик" },
+  { value: "curator", label: "Куратор" },
+  { value: "admin", label: "Администратор" },
+];
+
+function generatePassword() {
+  const chars = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ23456789!@#$";
+  return Array.from({ length: 12 }, () => chars[Math.floor(Math.random() * chars.length)]).join("");
+}
+
+const inputStyle: React.CSSProperties = {
+  border: "2px solid var(--border)",
+  background: "var(--background)",
+  outline: "none",
+  width: "100%",
+  padding: "0.5rem 0.75rem",
+  fontSize: "0.875rem",
+  fontFamily: "inherit",
+};
+
+const focusHandlers = {
+  onFocus: (e: React.FocusEvent<HTMLInputElement | HTMLSelectElement>) =>
+    (e.currentTarget.style.borderColor = "var(--foreground)"),
+  onBlur: (e: React.FocusEvent<HTMLInputElement | HTMLSelectElement>) =>
+    (e.currentTarget.style.borderColor = "var(--border)"),
+};
+
+function Field({ label, required, children }: { label: string; required?: boolean; children: React.ReactNode }) {
+  return (
+    <div className="space-y-1.5">
+      <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+        {label}
+        {required && <span style={{ color: "oklch(0.577 0.245 27.325)" }}> *</span>}
+      </label>
+      {children}
+    </div>
+  );
+}
+
+function Toggle({ label, hint, checked, onChange }: { label: string; hint?: string; checked: boolean; onChange: (v: boolean) => void }) {
+  return (
+    <div className="flex items-start gap-3">
+      <button type="button" onClick={() => onChange(!checked)} className="mt-0.5 flex-shrink-0">
+        <span
+          className="relative inline-block w-10 h-6 transition-colors"
+          style={{ background: checked ? "var(--accent)" : "var(--border)", border: "2px solid var(--foreground)" }}
+        >
+          <span
+            className="absolute top-0.5 w-4 h-4 transition-transform"
+            style={{ background: "var(--foreground)", left: "2px", transform: checked ? "translateX(16px)" : "translateX(0)" }}
+          />
+        </span>
+      </button>
+      <div>
+        <p className="text-sm font-medium" style={{ color: "var(--foreground)" }}>{label}</p>
+        {hint && <p className="text-xs mt-0.5" style={{ color: "var(--muted-foreground)" }}>{hint}</p>}
+      </div>
+    </div>
+  );
+}
+
+export function CreateUserForm() {
+  const router = useRouter();
+  const [pending, startTransition] = useTransition();
+  const [error, setError] = useState<string | null>(null);
+  const [showPassword, setShowPassword] = useState(false);
+
+  const [name, setName] = useState("");
+  const [email, setEmail] = useState("");
+  const [password, setPassword] = useState("");
+  const [role, setRole] = useState("student");
+  const [emailVerified, setEmailVerified] = useState(true);
+  const [sendWelcome, setSendWelcome] = useState(true);
+
+  function handleGenerate() {
+    setPassword(generatePassword());
+    setShowPassword(true);
+  }
+
+  function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    setError(null);
+    startTransition(async () => {
+      const result = await createUser({ name, email, password, role, emailVerified, sendWelcome });
+      if (!result.success) {
+        setError(result.error);
+        return;
+      }
+      router.push(`/admin/users/${result.userId}`);
+      router.refresh();
+    });
+  }
+
+  return (
+    <form onSubmit={handleSubmit} className="space-y-5 max-w-lg">
+      {/* Name */}
+      <Field label="Имя" required>
+        <input
+          value={name}
+          onChange={(e) => setName(e.target.value)}
+          placeholder="Иван Иванов"
+          required
+          style={inputStyle}
+          {...focusHandlers}
+        />
+      </Field>
+
+      {/* Email */}
+      <Field label="Email (логин)" required>
+        <input
+          type="email"
+          value={email}
+          onChange={(e) => setEmail(e.target.value)}
+          placeholder="user@example.com"
+          required
+          style={{ ...inputStyle, fontFamily: "var(--font-mono)" }}
+          {...focusHandlers}
+        />
+      </Field>
+
+      {/* Password */}
+      <Field label="Пароль" required>
+        <div className="flex gap-2">
+          <div className="relative flex-1">
+            <input
+              type={showPassword ? "text" : "password"}
+              value={password}
+              onChange={(e) => setPassword(e.target.value)}
+              placeholder="Минимум 8 символов"
+              required
+              minLength={8}
+              style={{ ...inputStyle, paddingRight: "2.5rem", fontFamily: "var(--font-mono)" }}
+              {...focusHandlers}
+            />
+            <button
+              type="button"
+              onClick={() => setShowPassword((v) => !v)}
+              className="absolute right-2 top-1/2 -translate-y-1/2"
+              style={{ color: "var(--muted-foreground)" }}
+            >
+              {showPassword ? <EyeOff size={15} /> : <Eye size={15} />}
+            </button>
+          </div>
+          <button
+            type="button"
+            onClick={handleGenerate}
+            title="Сгенерировать пароль"
+            className="btn-aubade px-3 flex items-center gap-1.5 text-xs whitespace-nowrap"
+          >
+            <RefreshCw size={13} />
+            Сгенерировать
+          </button>
+        </div>
+        {password && showPassword && (
+          <p className="text-xs mt-1 font-mono" style={{ color: "var(--muted-foreground)" }}>
+            {password}
+          </p>
+        )}
+      </Field>
+
+      {/* Role */}
+      <Field label="Роль">
+        <select
+          value={role}
+          onChange={(e) => setRole(e.target.value)}
+          style={{ ...inputStyle, appearance: "none", cursor: "pointer" }}
+          {...focusHandlers}
+        >
+          {ROLES.map((r) => (
+            <option key={r.value} value={r.value}>{r.label}</option>
+          ))}
+        </select>
+      </Field>
+
+      {/* Toggles */}
+      <div className="space-y-3 pt-1">
+        <Toggle
+          label="Email подтверждён"
+          hint="Пользователь сможет войти сразу, без подтверждения почты."
+          checked={emailVerified}
+          onChange={setEmailVerified}
+        />
+        <Toggle
+          label="Отправить приветственное письмо"
+          hint="Письмо будет отправлено на указанный email."
+          checked={sendWelcome}
+          onChange={setSendWelcome}
+        />
+      </div>
+
+      {/* Error */}
+      {error && (
+        <p className="text-sm px-3 py-2" style={{ border: "2px solid oklch(0.577 0.245 27.325)", color: "oklch(0.577 0.245 27.325)" }}>
+          {error}
+        </p>
+      )}
+
+      {/* Actions */}
+      <div className="flex gap-3 pt-2">
+        <button
+          type="submit"
+          disabled={pending}
+          className="btn-aubade btn-aubade-accent px-5 py-2 text-sm"
+          style={{ opacity: pending ? 0.6 : 1 }}
+        >
+          {pending ? "Создание..." : "Создать пользователя"}
+        </button>
+        <button
+          type="button"
+          onClick={() => router.back()}
+          className="btn-aubade px-4 py-2 text-sm"
+        >
+          Отмена
+        </button>
+      </div>
+    </form>
+  );
+}

src/components/admin/csv-exporter.tsx

@@ -0,0 +1,91 @@
+"use client";
+
+import { useState } from "react";
+import { Download } from "lucide-react";
+
+type Course = { id: string; title: string };
+
+const inputStyle: React.CSSProperties = {
+  border: "2px solid var(--border)",
+  background: "var(--background)",
+  outline: "none",
+  width: "100%",
+  padding: "0.5rem 0.75rem",
+  fontSize: "0.875rem",
+  fontFamily: "inherit",
+};
+const focusHandlers = {
+  onFocus: (e: React.FocusEvent<HTMLSelectElement>) =>
+    (e.currentTarget.style.borderColor = "var(--foreground)"),
+  onBlur: (e: React.FocusEvent<HTMLSelectElement>) =>
+    (e.currentTarget.style.borderColor = "var(--border)"),
+};
+
+export function CsvExporter({ courses }: { courses: Course[] }) {
+  const [courseId, setCourseId] = useState("");
+  const [encoding, setEncoding] = useState<"utf8" | "win1251">("utf8");
+  const [loading, setLoading] = useState(false);
+
+  async function handleExport() {
+    setLoading(true);
+    try {
+      const params = new URLSearchParams({ encoding });
+      if (courseId) params.set("courseId", courseId);
+
+      const res = await fetch(`/api/admin/export-users?${params}`);
+      if (!res.ok) throw new Error("Ошибка сервера");
+
+      const blob = await res.blob();
+      const url = URL.createObjectURL(blob);
+      const a = document.createElement("a");
+      a.href = url;
+      const cd = res.headers.get("content-disposition") ?? "";
+      const match = cd.match(/filename="([^"]+)"/);
+      a.download = match?.[1] ?? "students.csv";
+      a.click();
+      URL.revokeObjectURL(url);
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  return (
+    <div className="space-y-5 max-w-md">
+      <div className="space-y-1.5">
+        <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+          Фильтр по курсу
+        </label>
+        <select value={courseId} onChange={(e) => setCourseId(e.target.value)} style={{ ...inputStyle, appearance: "none" }} {...focusHandlers}>
+          <option value="">Все ученики</option>
+          {courses.map((c) => <option key={c.id} value={c.id}>{c.title}</option>)}
+        </select>
+      </div>
+
+      <div className="space-y-1.5">
+        <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+          Кодировка файла
+        </label>
+        <select value={encoding} onChange={(e) => setEncoding(e.target.value as "utf8" | "win1251")} style={{ ...inputStyle, appearance: "none" }} {...focusHandlers}>
+          <option value="utf8">UTF-8 (универсальная)</option>
+          <option value="win1251">Windows-1251 (для Excel на Windows)</option>
+        </select>
+      </div>
+
+      <div className="p-4 space-y-1" style={{ border: "2px solid var(--border)" }}>
+        <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>Поля в файле</p>
+        <p className="text-sm">Email · Имя · Телефон · Дата регистрации · Курсы · Прогресс (уроков)</p>
+      </div>
+
+      <button
+        type="button"
+        onClick={handleExport}
+        disabled={loading}
+        className="btn-aubade btn-aubade-accent flex items-center gap-2 px-5 py-2 text-sm"
+        style={{ opacity: loading ? 0.6 : 1 }}
+      >
+        <Download size={14} />
+        {loading ? "Формирую файл..." : "Скачать CSV"}
+      </button>
+    </div>
+  );
+}

src/components/admin/csv-importer.tsx

@@ -0,0 +1,384 @@
+"use client";
+
+import { useState, useTransition, useRef } from "react";
+import { Upload, FileText, CheckCircle, AlertCircle, Loader } from "lucide-react";
+import {
+  parseCSV,
+  applyImport,
+  type PreviewResult,
+  type ImportOptions,
+  type ApplyResult,
+} from "@/app/admin/import-export/import-actions";
+
+type Course = { id: string; title: string };
+
+const inputStyle: React.CSSProperties = {
+  border: "2px solid var(--border)",
+  background: "var(--background)",
+  outline: "none",
+  width: "100%",
+  padding: "0.5rem 0.75rem",
+  fontSize: "0.875rem",
+  fontFamily: "inherit",
+};
+const focusHandlers = {
+  onFocus: (e: React.FocusEvent<HTMLInputElement | HTMLSelectElement>) =>
+    (e.currentTarget.style.borderColor = "var(--foreground)"),
+  onBlur: (e: React.FocusEvent<HTMLInputElement | HTMLSelectElement>) =>
+    (e.currentTarget.style.borderColor = "var(--border)"),
+};
+
+function Toggle({ label, hint, checked, onChange }: { label: string; hint?: string; checked: boolean; onChange: (v: boolean) => void }) {
+  return (
+    <div className="flex items-start gap-3">
+      <button type="button" onClick={() => onChange(!checked)} className="mt-0.5 shrink-0">
+        <span className="relative inline-block w-10 h-6" style={{ background: checked ? "var(--accent)" : "var(--border)", border: "2px solid var(--foreground)" }}>
+          <span className="absolute top-0.5 w-4 h-4 transition-transform" style={{ background: "var(--foreground)", left: "2px", transform: checked ? "translateX(16px)" : "translateX(0)" }} />
+        </span>
+      </button>
+      <div>
+        <p className="text-sm font-medium">{label}</p>
+        {hint && <p className="text-xs mt-0.5" style={{ color: "var(--muted-foreground)" }}>{hint}</p>}
+      </div>
+    </div>
+  );
+}
+
+function StepIndicator({ step }: { step: number }) {
+  const steps = ["Загрузка", "Предпросмотр", "Опции", "Готово"];
+  return (
+    <div className="flex items-center gap-0 mb-6">
+      {steps.map((label, i) => {
+        const num = i + 1;
+        const active = num === step;
+        const done = num < step;
+        return (
+          <div key={num} className="flex items-center">
+            <div className="flex flex-col items-center gap-1">
+              <div
+                className="w-7 h-7 flex items-center justify-center text-xs font-bold"
+                style={{
+                  border: "2px solid var(--foreground)",
+                  background: done || active ? "var(--foreground)" : "transparent",
+                  color: done || active ? "var(--background)" : "var(--foreground)",
+                }}
+              >
+                {done ? "✓" : num}
+              </div>
+              <span className="text-xs" style={{ color: active ? "var(--foreground)" : "var(--muted-foreground)", fontWeight: active ? 700 : 400 }}>
+                {label}
+              </span>
+            </div>
+            {i < steps.length - 1 && (
+              <div className="w-12 h-0.5 mx-1 mb-5" style={{ background: done ? "var(--foreground)" : "var(--border)" }} />
+            )}
+          </div>
+        );
+      })}
+    </div>
+  );
+}
+
+// ── Main component ────────────────────────────────────────────────────────────
+
+export function CsvImporter({ courses }: { courses: Course[] }) {
+  const [step, setStep] = useState(1);
+  const [pending, startTransition] = useTransition();
+  const [error, setError] = useState<string | null>(null);
+  const fileRef = useRef<HTMLInputElement>(null);
+
+  // Step 1 state
+  const [encoding, setEncoding] = useState<"utf8" | "win1251">("utf8");
+  const [updateExisting, setUpdateExisting] = useState(false);
+  const [fileBase64, setFileBase64] = useState<string | null>(null);
+  const [fileName, setFileName] = useState<string | null>(null);
+
+  // Step 2 state
+  const [preview, setPreview] = useState<PreviewResult | null>(null);
+
+  // Step 3 state
+  const [autoVerifyEmail, setAutoVerifyEmail] = useState(true);
+  const [courseId, setCourseId] = useState("");
+  const [accessDays, setAccessDays] = useState("0");
+  const [sendWelcome, setSendWelcome] = useState(false);
+
+  // Step 4 state
+  const [result, setResult] = useState<ApplyResult | null>(null);
+
+  function handleFileChange(e: React.ChangeEvent<HTMLInputElement>) {
+    const file = e.target.files?.[0];
+    if (!file) return;
+    setFileName(file.name);
+    const reader = new FileReader();
+    reader.onload = () => {
+      const ab = reader.result as ArrayBuffer;
+      const bytes = new Uint8Array(ab);
+      let binary = "";
+      bytes.forEach((b) => (binary += String.fromCharCode(b)));
+      setFileBase64(btoa(binary));
+    };
+    reader.readAsArrayBuffer(file);
+  }
+
+  function handleParse() {
+    if (!fileBase64) return;
+    setError(null);
+    startTransition(async () => {
+      try {
+        const result = await parseCSV(fileBase64, encoding, updateExisting);
+        setPreview(result);
+        setStep(2);
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "Ошибка разбора файла");
+      }
+    });
+  }
+
+  function handleApply() {
+    if (!preview) return;
+    setError(null);
+    const options: ImportOptions = {
+      updateExisting,
+      autoVerifyEmail,
+      courseId: courseId || undefined,
+      accessDays: parseInt(accessDays) || 0,
+      sendWelcome,
+      encoding,
+    };
+    startTransition(async () => {
+      try {
+        const r = await applyImport(preview.rows, options);
+        setResult(r);
+        setStep(4);
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "Ошибка импорта");
+      }
+    });
+  }
+
+  function handleReset() {
+    setStep(1);
+    setFileBase64(null);
+    setFileName(null);
+    setPreview(null);
+    setResult(null);
+    setError(null);
+    if (fileRef.current) fileRef.current.value = "";
+  }
+
+  return (
+    <div>
+      <StepIndicator step={step} />
+
+      {/* ── Step 1: Upload ── */}
+      {step === 1 && (
+        <div className="space-y-5">
+          {/* File picker */}
+          <div
+            className="flex flex-col items-center justify-center gap-3 p-8 cursor-pointer"
+            style={{ border: "2px dashed var(--border)" }}
+            onClick={() => fileRef.current?.click()}
+          >
+            <Upload size={28} style={{ color: "var(--muted-foreground)" }} />
+            {fileName ? (
+              <div className="text-center">
+                <p className="font-medium flex items-center gap-1.5">
+                  <FileText size={15} /> {fileName}
+                </p>
+                <p className="text-xs mt-0.5" style={{ color: "var(--muted-foreground)" }}>Нажмите чтобы выбрать другой файл</p>
+              </div>
+            ) : (
+              <div className="text-center">
+                <p className="font-medium">Выберите CSV-файл</p>
+                <p className="text-xs mt-0.5" style={{ color: "var(--muted-foreground)" }}>Поддерживаются файлы из emdesell, Excel и любого табличного редактора</p>
+              </div>
+            )}
+            <input ref={fileRef} type="file" accept=".csv,text/csv" className="hidden" onChange={handleFileChange} />
+          </div>
+
+          {/* Options */}
+          <div className="grid grid-cols-2 gap-4">
+            <div className="space-y-1.5">
+              <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>Кодировка</label>
+              <select value={encoding} onChange={(e) => setEncoding(e.target.value as "utf8" | "win1251")} style={{ ...inputStyle, appearance: "none" }} {...focusHandlers}>
+                <option value="utf8">UTF-8 (стандарт)</option>
+                <option value="win1251">Windows-1251 (Excel)</option>
+              </select>
+            </div>
+            <div className="flex items-end pb-0.5">
+              <Toggle
+                label="Обновлять существующих"
+                hint="Если пользователь уже есть — обновить данные"
+                checked={updateExisting}
+                onChange={setUpdateExisting}
+              />
+            </div>
+          </div>
+
+          {/* Template download hint */}
+          <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+            Ожидаемые колонки: <span className="font-mono">Email</span>, <span className="font-mono">Имя</span>, <span className="font-mono">Фамилия</span>, <span className="font-mono">Телефон</span> (порядок не важен, первая строка — заголовки).
+          </p>
+
+          {error && <p className="text-sm p-3" style={{ border: "2px solid oklch(0.577 0.245 27.325)", color: "oklch(0.577 0.245 27.325)" }}>{error}</p>}
+
+          <button
+            type="button"
+            disabled={!fileBase64 || pending}
+            onClick={handleParse}
+            className="btn-aubade btn-aubade-accent px-5 py-2 text-sm flex items-center gap-2"
+            style={{ opacity: !fileBase64 || pending ? 0.5 : 1 }}
+          >
+            {pending ? <><Loader size={14} className="animate-spin" /> Разбираю...</> : "Далее →"}
+          </button>
+        </div>
+      )}
+
+      {/* ── Step 2: Preview ── */}
+      {step === 2 && preview && (
+        <div className="space-y-4">
+          {/* Stats */}
+          <div className="grid grid-cols-3 gap-3">
+            {[
+              { label: "Будет создано", count: preview.countNew, color: "#3A6A3A" },
+              { label: "Будет обновлено", count: preview.countUpdate, color: "var(--foreground)" },
+              { label: "Ошибок", count: preview.countError, color: "oklch(0.577 0.245 27.325)" },
+            ].map(({ label, count, color }) => (
+              <div key={label} className="card-aubade p-4 text-center">
+                <p className="text-2xl font-bold" style={{ color }}>{count}</p>
+                <p className="text-xs mt-0.5" style={{ color: "var(--muted-foreground)" }}>{label}</p>
+              </div>
+            ))}
+          </div>
+
+          {/* Table */}
+          <div className="overflow-auto max-h-72" style={{ border: "2px solid var(--border)" }}>
+            <table className="w-full text-sm">
+              <thead>
+                <tr style={{ borderBottom: "2px solid var(--border)", background: "var(--background)" }}>
+                  {["#", "Email", "Имя", "Телефон", "Статус"].map((h) => (
+                    <th key={h} className="text-left px-3 py-2 text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>{h}</th>
+                  ))}
+                </tr>
+              </thead>
+              <tbody>
+                {preview.rows.map((row) => (
+                  <tr key={row.index} style={{ borderBottom: "1px solid var(--border)" }}>
+                    <td className="px-3 py-1.5 text-xs" style={{ color: "var(--muted-foreground)" }}>{row.index}</td>
+                    <td className="px-3 py-1.5 font-mono text-xs">{row.email}</td>
+                    <td className="px-3 py-1.5 text-xs">{row.name}</td>
+                    <td className="px-3 py-1.5 text-xs">{row.phone || "—"}</td>
+                    <td className="px-3 py-1.5">
+                      {row.status === "new" && <span className="text-xs font-bold" style={{ color: "#3A6A3A" }}>✦ Новый</span>}
+                      {row.status === "update" && <span className="text-xs font-bold">↻ Обновить</span>}
+                      {row.status === "error" && (
+                        <span className="text-xs font-bold flex items-center gap-1" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+                          <AlertCircle size={12} /> {row.errorMsg}
+                        </span>
+                      )}
+                    </td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+
+          <div className="flex gap-3">
+            <button type="button" onClick={() => setStep(3)} disabled={preview.countNew + preview.countUpdate === 0}
+              className="btn-aubade btn-aubade-accent px-5 py-2 text-sm"
+              style={{ opacity: preview.countNew + preview.countUpdate === 0 ? 0.4 : 1 }}>
+              Далее →
+            </button>
+            <button type="button" onClick={handleReset} className="btn-aubade px-4 py-2 text-sm">← Назад</button>
+          </div>
+        </div>
+      )}
+
+      {/* ── Step 3: Options ── */}
+      {step === 3 && (
+        <div className="space-y-5 max-w-md">
+          <Toggle
+            label="Подтвердить email автоматически"
+            hint="Пользователи смогут войти сразу, без подтверждения почты."
+            checked={autoVerifyEmail}
+            onChange={setAutoVerifyEmail}
+          />
+
+          <div className="space-y-1.5">
+            <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>Курс для доступа</label>
+            <select value={courseId} onChange={(e) => setCourseId(e.target.value)} style={{ ...inputStyle, appearance: "none" }} {...focusHandlers}>
+              <option value="">— Не присваивать —</option>
+              {courses.map((c) => <option key={c.id} value={c.id}>{c.title}</option>)}
+            </select>
+          </div>
+
+          {courseId && (
+            <div className="space-y-1.5">
+              <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>Срок доступа (дней)</label>
+              <input
+                type="number"
+                min="0"
+                value={accessDays}
+                onChange={(e) => setAccessDays(e.target.value)}
+                placeholder="0 — бессрочно"
+                style={inputStyle}
+                {...focusHandlers}
+              />
+              <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>0 = бессрочный доступ</p>
+            </div>
+          )}
+
+          <Toggle
+            label="Отправить приветственное письмо"
+            hint="Письмо будет отправлено каждому новому пользователю."
+            checked={sendWelcome}
+            onChange={setSendWelcome}
+          />
+
+          {error && <p className="text-sm p-3" style={{ border: "2px solid oklch(0.577 0.245 27.325)", color: "oklch(0.577 0.245 27.325)" }}>{error}</p>}
+
+          <div className="flex gap-3 pt-2">
+            <button type="button" onClick={handleApply} disabled={pending}
+              className="btn-aubade btn-aubade-accent px-5 py-2 text-sm flex items-center gap-2"
+              style={{ opacity: pending ? 0.5 : 1 }}>
+              {pending ? <><Loader size={14} className="animate-spin" /> Импортирую...</> : "Применить импорт"}
+            </button>
+            <button type="button" onClick={() => setStep(2)} className="btn-aubade px-4 py-2 text-sm">← Назад</button>
+          </div>
+        </div>
+      )}
+
+      {/* ── Step 4: Result ── */}
+      {step === 4 && result && (
+        <div className="space-y-5">
+          <div className="flex items-center gap-3 p-5" style={{ border: "2px solid #3A6A3A" }}>
+            <CheckCircle size={24} style={{ color: "#3A6A3A", flexShrink: 0 }} />
+            <div>
+              <p className="font-bold">Импорт завершён</p>
+              <p className="text-sm mt-0.5" style={{ color: "var(--muted-foreground)" }}>
+                Создано: <strong>{result.created}</strong> · Обновлено: <strong>{result.updated}</strong>
+              </p>
+            </div>
+          </div>
+
+          {result.errors.length > 0 && (
+            <div className="space-y-1">
+              <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+                Ошибки ({result.errors.length})
+              </p>
+              <div className="max-h-40 overflow-y-auto space-y-1">
+                {result.errors.map((e, i) => (
+                  <p key={i} className="text-xs font-mono p-2" style={{ border: "1px solid oklch(0.577 0.245 27.325)", color: "oklch(0.577 0.245 27.325)" }}>{e}</p>
+                ))}
+              </div>
+            </div>
+          )}
+
+          <button type="button" onClick={handleReset} className="btn-aubade px-4 py-2 text-sm">
+            Импортировать ещё
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}

src/components/admin/enrollment-manager.tsx

@@ -0,0 +1,190 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { Input } from "@/components/ui/input";
+import { Button } from "@/components/ui/button";
+import { grantAccess, revokeAccess } from "@/app/admin/courses/[courseId]/actions";
+
+interface Student {
+  id: string;
+  name: string;
+  email: string;
+}
+
+interface Enrollment {
+  userId: string;
+  expiresAt: Date | null;
+}
+
+interface LogEntry {
+  id: string;
+  action: string;
+  createdAt: Date;
+  note: string | null;
+  user: { name: string };
+  grantedBy: { name: string } | null;
+}
+
+interface Props {
+  courseId: string;
+  allStudents: Student[];
+  enrollments: Enrollment[];
+  accessLogs: LogEntry[];
+}
+
+export function EnrollmentManager({ courseId, allStudents, enrollments, accessLogs }: Props) {
+  const [enrolledMap, setEnrolledMap] = useState<Map<string, Date | null>>(
+    () => new Map(enrollments.map((e) => [e.userId, e.expiresAt]))
+  );
+  const [search, setSearch] = useState("");
+  const [expiryDate, setExpiryDate] = useState("");
+  const [note, setNote] = useState("");
+  const [showLog, setShowLog] = useState(false);
+  const [pending, startTransition] = useTransition();
+
+  const filtered = allStudents.filter(
+    (s) =>
+      s.name.toLowerCase().includes(search.toLowerCase()) ||
+      s.email.toLowerCase().includes(search.toLowerCase())
+  );
+
+  function handleGrant(userId: string) {
+    const newMap = new Map(enrolledMap);
+    newMap.set(userId, expiryDate ? new Date(expiryDate) : null);
+    setEnrolledMap(newMap);
+    startTransition(() => grantAccess(courseId, userId, expiryDate || null, note || undefined));
+  }
+
+  function handleRevoke(userId: string) {
+    const newMap = new Map(enrolledMap);
+    newMap.delete(userId);
+    setEnrolledMap(newMap);
+    startTransition(() => revokeAccess(courseId, userId, note || undefined));
+  }
+
+  const enrolledStudents = allStudents.filter((s) => enrolledMap.has(s.id));
+
+  function formatExpiry(date: Date | null) {
+    if (!date) return "Бессрочно";
+    const d = new Date(date);
+    const now = new Date();
+    const expired = d < now;
+    return (
+      <span style={{ color: expired ? "oklch(0.577 0.245 27.325)" : "var(--foreground)" }}>
+        {expired ? "Истёк " : "До "}
+        {d.toLocaleDateString("ru-RU")}
+      </span>
+    );
+  }
+
+  return (
+    <div className="space-y-5">
+      {/* Enrolled list */}
+      {enrolledStudents.length > 0 && (
+        <div>
+          <p className="text-xs font-bold uppercase tracking-widest mb-3" style={{ color: "var(--muted-foreground)" }}>
+            Доступ открыт — {enrolledStudents.length}
+          </p>
+          <div className="space-y-1.5">
+            {enrolledStudents.map((s) => (
+              <div key={s.id} className="flex items-center justify-between px-3 py-2" style={{ border: "2px solid var(--border)", background: "var(--color-surface)" }}>
+                <div>
+                  <p className="text-sm font-medium">{s.name}</p>
+                  <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>{s.email}</p>
+                </div>
+                <div className="flex items-center gap-3">
+                  <span className="text-xs">{formatExpiry(enrolledMap.get(s.id) ?? null)}</span>
+                  <button onClick={() => handleRevoke(s.id)} disabled={pending} className="text-xs underline" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+                    Отозвать
+                  </button>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Grant form */}
+      <div>
+        <p className="text-xs font-bold uppercase tracking-widest mb-3" style={{ color: "var(--muted-foreground)" }}>
+          Добавить ученика
+        </p>
+        <div className="flex gap-3 mb-3 flex-wrap">
+          <div className="flex-1 min-w-48">
+            <label className="text-xs uppercase tracking-wider mb-1 block" style={{ color: "var(--muted-foreground)" }}>Поиск</label>
+            <Input placeholder="Имя или email..." value={search} onChange={(e) => setSearch(e.target.value)} />
+          </div>
+          <div>
+            <label className="text-xs uppercase tracking-wider mb-1 block" style={{ color: "var(--muted-foreground)" }}>
+              Срок доступа
+            </label>
+            <Input type="date" value={expiryDate} onChange={(e) => setExpiryDate(e.target.value)} className="w-44" />
+          </div>
+          <div className="flex-1 min-w-40">
+            <label className="text-xs uppercase tracking-wider mb-1 block" style={{ color: "var(--muted-foreground)" }}>
+              Примечание
+            </label>
+            <Input placeholder="Оплата, договор..." value={note} onChange={(e) => setNote(e.target.value)} />
+          </div>
+        </div>
+        <div className="space-y-1.5 max-h-52 overflow-y-auto">
+          {filtered.map((student) => {
+            const enrolled = enrolledMap.has(student.id);
+            return (
+              <div key={student.id} className="flex items-center justify-between px-3 py-2" style={{ border: "2px solid var(--border)", background: "var(--background)" }}>
+                <div>
+                  <p className="text-sm font-medium">{student.name}</p>
+                  <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>{student.email}</p>
+                </div>
+                {enrolled ? (
+                  <button onClick={() => handleRevoke(student.id)} disabled={pending} className="text-xs px-3 py-1.5" style={{ border: "2px solid oklch(0.577 0.245 27.325)", color: "oklch(0.577 0.245 27.325)" }}>
+                    Отозвать
+                  </button>
+                ) : (
+                  <button onClick={() => handleGrant(student.id)} disabled={pending} className="btn-aubade text-xs py-1.5 px-3">
+                    Дать доступ
+                  </button>
+                )}
+              </div>
+            );
+          })}
+          {filtered.length === 0 && (
+            <p className="text-sm py-2" style={{ color: "var(--muted-foreground)" }}>Студентов не найдено</p>
+          )}
+        </div>
+      </div>
+
+      {/* Access log */}
+      {accessLogs.length > 0 && (
+        <div>
+          <button
+            onClick={() => setShowLog(!showLog)}
+            className="text-xs font-bold uppercase tracking-widest underline"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            История доступа ({accessLogs.length}) {showLog ? "▲" : "▼"}
+          </button>
+          {showLog && (
+            <div className="mt-3 space-y-1.5 max-h-64 overflow-y-auto">
+              {accessLogs.map((log) => (
+                <div key={log.id} className="flex items-start gap-3 px-3 py-2 text-xs" style={{ border: "2px solid var(--border)", background: "var(--background)" }}>
+                  <span style={{ color: log.action === "granted" ? "#3A6A3A" : "oklch(0.577 0.245 27.325)", fontWeight: 700 }}>
+                    {log.action === "granted" ? "▲ Выдан" : "▼ Отозван"}
+                  </span>
+                  <span className="flex-1">{log.user.name}</span>
+                  <span style={{ color: "var(--muted-foreground)" }}>
+                    {log.grantedBy?.name ?? "—"}
+                  </span>
+                  {log.note && <span style={{ color: "var(--muted-foreground)" }}>{log.note}</span>}
+                  <span style={{ color: "var(--muted-foreground)" }}>
+                    {new Date(log.createdAt).toLocaleString("ru-RU", { day: "2-digit", month: "2-digit", hour: "2-digit", minute: "2-digit" })}
+                  </span>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}

src/components/admin/homework-editor.tsx

@@ -0,0 +1,94 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { saveHomework, deleteHomework } from "@/app/admin/courses/[courseId]/modules/[moduleId]/lessons/[lessonId]/homework-actions";
+
+interface Props {
+  lessonId: string;
+  initial: { id: string; description: string } | null;
+}
+
+export function HomeworkEditor({ lessonId, initial }: Props) {
+  const [editing, setEditing] = useState(!initial);
+  const [text, setText] = useState(initial?.description ?? "");
+  const [saved, setSaved] = useState(false);
+  const [pending, startTransition] = useTransition();
+
+  const inputStyle = {
+    border: "2px solid var(--border)",
+    background: "var(--background)",
+    outline: "none",
+    width: "100%",
+    padding: "0.5rem 0.75rem",
+    fontSize: "0.875rem",
+    fontFamily: "inherit",
+    resize: "vertical" as const,
+    minHeight: "120px",
+  };
+
+  function handleSave() {
+    if (!text.trim()) return;
+    startTransition(async () => {
+      await saveHomework(lessonId, text.trim());
+      setSaved(true);
+      setEditing(false);
+      setTimeout(() => setSaved(false), 2000);
+    });
+  }
+
+  function handleDelete() {
+    if (!confirm("Удалить домашнее задание? Все сданные работы будут удалены.")) return;
+    startTransition(async () => {
+      await deleteHomework(lessonId);
+      setText("");
+      setEditing(true);
+    });
+  }
+
+  if (!editing && initial) {
+    return (
+      <div className="space-y-3">
+        <div className="px-4 py-3 text-sm whitespace-pre-wrap" style={{ border: "2px solid var(--border)", background: "var(--color-surface)" }}>
+          {text || initial.description}
+        </div>
+        <div className="flex gap-2">
+          <button onClick={() => setEditing(true)} className="btn-aubade text-xs px-3 py-1.5">
+            Редактировать
+          </button>
+          <button onClick={handleDelete} disabled={pending} className="text-xs px-3 py-1.5" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+            Удалить ДЗ
+          </button>
+          {saved && <span className="text-xs self-center" style={{ color: "var(--muted-foreground)" }}>✓ Сохранено</span>}
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-3">
+      <textarea
+        value={text}
+        onChange={(e) => setText(e.target.value)}
+        style={inputStyle}
+        placeholder="Опишите задание для студентов..."
+        onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+        onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+      />
+      <div className="flex items-center gap-2">
+        <button
+          onClick={handleSave}
+          disabled={pending || !text.trim()}
+          className="btn-aubade btn-aubade-accent text-xs px-4 py-1.5"
+          style={{ opacity: pending || !text.trim() ? 0.6 : 1 }}
+        >
+          {pending ? "Сохранение..." : "Сохранить задание"}
+        </button>
+        {initial && (
+          <button onClick={() => { setEditing(false); setText(initial.description); }} className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+            Отмена
+          </button>
+        )}
+      </div>
+    </div>
+  );
+}

src/components/admin/homework-filters.tsx

@@ -0,0 +1,100 @@
+"use client";
+
+import { useRouter, useSearchParams, usePathname } from "next/navigation";
+import { useTransition } from "react";
+import { Search } from "lucide-react";
+
+const inputStyle: React.CSSProperties = {
+  border: "2px solid var(--border)",
+  background: "var(--background)",
+  outline: "none",
+  padding: "0.4rem 0.75rem",
+  fontSize: "0.8rem",
+  fontFamily: "inherit",
+};
+
+type Course = { id: string; title: string };
+
+export function HomeworkFilters({ courses }: { courses: Course[] }) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const sp = useSearchParams();
+  const [, startTransition] = useTransition();
+
+  function update(key: string, value: string) {
+    const params = new URLSearchParams(sp.toString());
+    if (value) params.set(key, value);
+    else params.delete(key);
+    params.delete("page"); // reset to page 1 on filter change
+    startTransition(() => router.push(`${pathname}?${params.toString()}`));
+  }
+
+  const status = sp.get("status") ?? "";
+  const courseId = sp.get("courseId") ?? "";
+  const search = sp.get("search") ?? "";
+
+  return (
+    <div className="flex flex-wrap gap-2 mb-5">
+      {/* Search */}
+      <div className="relative">
+        <Search size={13} className="absolute left-2.5 top-1/2 -translate-y-1/2" style={{ color: "var(--muted-foreground)" }} />
+        <input
+          defaultValue={search}
+          placeholder="Имя или email ученика"
+          style={{ ...inputStyle, paddingLeft: "2rem", width: 220 }}
+          onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => {
+            e.currentTarget.style.borderColor = "var(--border)";
+            update("search", e.currentTarget.value.trim());
+          }}
+          onKeyDown={(e) => {
+            if (e.key === "Enter") {
+              e.currentTarget.blur();
+            }
+          }}
+        />
+      </div>
+
+      {/* Status */}
+      <select
+        value={status}
+        onChange={(e) => update("status", e.target.value)}
+        style={{ ...inputStyle, appearance: "none", paddingRight: "1.5rem", cursor: "pointer" }}
+        onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+        onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+      >
+        <option value="">Все статусы</option>
+        <option value="pending">Ожидают проверки</option>
+        <option value="reviewed">Проверено</option>
+      </select>
+
+      {/* Course */}
+      <select
+        value={courseId}
+        onChange={(e) => update("courseId", e.target.value)}
+        style={{ ...inputStyle, appearance: "none", paddingRight: "1.5rem", cursor: "pointer", maxWidth: 220 }}
+        onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+        onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+      >
+        <option value="">Все курсы</option>
+        {courses.map((c) => (
+          <option key={c.id} value={c.id}>{c.title}</option>
+        ))}
+      </select>
+
+      {/* Reset */}
+      {(search || status || courseId) && (
+        <button
+          type="button"
+          onClick={() => {
+            startTransition(() => router.push(pathname));
+          }}
+          className="text-xs px-3"
+          style={{ border: "2px solid var(--border)", color: "var(--muted-foreground)" }}
+        >
+          Сбросить
+        </button>
+      )}
+    </div>
+  );
+}

src/components/admin/lesson-editor.tsx

@@ -0,0 +1,371 @@
+"use client";
+
+import { useState, useCallback, useTransition } from "react";
+import { useEditor, EditorContent } from "@tiptap/react";
+import StarterKit from "@tiptap/starter-kit";
+import Image from "@tiptap/extension-image";
+import Link from "@tiptap/extension-link";
+import Underline from "@tiptap/extension-underline";
+import Placeholder from "@tiptap/extension-placeholder";
+import { Save, Eye, FileUp, ChevronLeft, ChevronRight } from "lucide-react";
+import { useRouter } from "next/navigation";
+import { saveLesson } from "@/app/admin/courses/[courseId]/modules/[moduleId]/lessons/[lessonId]/actions";
+
+interface LessonData {
+  id: string;
+  title: string;
+  kinescopeId: string;
+  content: object;
+  published: boolean;
+}
+
+interface SiblingLesson {
+  id: string;
+  title: string;
+}
+
+export function LessonEditor({
+  lesson,
+  courseId,
+  moduleId,
+  courseSlug,
+  prevLesson,
+  nextLesson,
+}: {
+  lesson: LessonData;
+  courseId: string;
+  moduleId: string;
+  courseSlug: string;
+  prevLesson?: SiblingLesson | null;
+  nextLesson?: SiblingLesson | null;
+}) {
+  const router = useRouter();
+  const [title, setTitle] = useState(lesson.title);
+  const [kinescopeId, setKinescopeId] = useState(lesson.kinescopeId);
+  const [published, setPublished] = useState(lesson.published);
+  const [uploading, setUploading] = useState(false);
+  const [importing, setImporting] = useState(false);
+  const [importError, setImportError] = useState<string | null>(null);
+  const [saved, setSaved] = useState(false);
+  const [pending, startTransition] = useTransition();
+
+  const inputStyle = {
+    border: "2px solid var(--border)",
+    background: "var(--background)",
+    outline: "none",
+    width: "100%",
+    padding: "0.5rem 0.75rem",
+    fontSize: "0.875rem",
+    fontFamily: "inherit",
+  } as React.CSSProperties;
+
+  const editor = useEditor({
+    extensions: [
+      StarterKit,
+      Underline,
+      Image.configure({ inline: false }),
+      Link.configure({ openOnClick: false }),
+      Placeholder.configure({ placeholder: "Начните писать текст урока..." }),
+    ],
+    content: Object.keys(lesson.content).length ? lesson.content : undefined,
+    editorProps: {
+      attributes: {
+        class: "prose prose-slate max-w-none min-h-[300px] focus:outline-none p-4",
+      },
+    },
+  });
+
+  const uploadImage = useCallback(async () => {
+    const input = document.createElement("input");
+    input.type = "file";
+    input.accept = "image/*";
+    input.onchange = async () => {
+      const file = input.files?.[0];
+      if (!file || !editor) return;
+      setUploading(true);
+      const fd = new FormData();
+      fd.append("file", file);
+      const res = await fetch("/api/admin/upload", { method: "POST", body: fd });
+      const data = await res.json();
+      if (data.url) editor.chain().focus().setImage({ src: data.url }).run();
+      setUploading(false);
+    };
+    input.click();
+  }, [editor]);
+
+  const importMd = useCallback(() => {
+    const input = document.createElement("input");
+    input.type = "file";
+    input.accept = ".md";
+    input.onchange = async () => {
+      const file = input.files?.[0];
+      if (!file || !editor) return;
+      setImporting(true);
+      setImportError(null);
+      try {
+        const fd = new FormData();
+        fd.append("file", file);
+        const res = await fetch("/api/admin/import-md", { method: "POST", body: fd });
+        if (!res.ok) throw new Error("Ошибка импорта");
+        const data = await res.json();
+        if (data.title) setTitle(data.title);
+        if (data.kinescopeId) setKinescopeId(data.kinescopeId);
+        if (data.published !== null) setPublished(data.published);
+        if (data.content) editor.commands.setContent(data.content);
+      } catch {
+        setImportError("Не удалось импортировать файл");
+      } finally {
+        setImporting(false);
+      }
+    };
+    input.click();
+  }, [editor]);
+
+  const addLink = useCallback(() => {
+    if (!editor) return;
+    const prev = editor.getAttributes("link").href as string | undefined;
+    const url = window.prompt("Ссылка:", prev ?? "https://");
+    if (url === null) return;
+    if (url === "") {
+      editor.chain().focus().unsetLink().run();
+    } else {
+      editor.chain().focus().setLink({ href: url, target: "_blank" }).run();
+    }
+  }, [editor]);
+
+  function handleSave() {
+    if (!editor) return;
+    startTransition(async () => {
+      await saveLesson(lesson.id, courseId, moduleId, {
+        title,
+        kinescopeId,
+        content: editor.getJSON(),
+        published,
+      });
+      setSaved(true);
+      setTimeout(() => setSaved(false), 2000);
+    });
+  }
+
+  function navigateTo(lessonId: string) {
+    router.push(`/admin/courses/${courseId}/modules/${moduleId}/lessons/${lessonId}`);
+  }
+
+  return (
+    <div className="space-y-5">
+      {/* Header controls */}
+      <div className="flex items-center justify-between gap-2 flex-wrap">
+        {/* Left: published toggle + prev/next */}
+        <div className="flex items-center gap-3">
+          <button
+            type="button"
+            role="switch"
+            aria-checked={published}
+            onClick={() => setPublished(!published)}
+            className="flex items-center gap-2 text-sm"
+          >
+            <span
+              className="relative inline-block w-10 h-6 transition-colors"
+              style={{
+                background: published ? "var(--accent)" : "var(--border)",
+                border: "2px solid var(--foreground)",
+              }}
+            >
+              <span
+                className="absolute top-0.5 w-4 h-4 transition-transform"
+                style={{
+                  background: "var(--foreground)",
+                  left: "2px",
+                  transform: published ? "translateX(16px)" : "translateX(0)",
+                }}
+              />
+            </span>
+            <span style={{ color: published ? "var(--foreground)" : "var(--muted-foreground)" }}>
+              {published ? "Опубликован" : "Черновик"}
+            </span>
+          </button>
+
+          {/* Prev / Next navigation */}
+          <div className="flex items-center gap-1">
+            <button
+              type="button"
+              onClick={() => prevLesson && navigateTo(prevLesson.id)}
+              disabled={!prevLesson}
+              title={prevLesson ? `← ${prevLesson.title}` : "Первый урок в модуле"}
+              className="btn-aubade flex items-center gap-1 px-2 py-2 text-sm disabled:opacity-30"
+            >
+              <ChevronLeft size={14} />
+            </button>
+            <button
+              type="button"
+              onClick={() => nextLesson && navigateTo(nextLesson.id)}
+              disabled={!nextLesson}
+              title={nextLesson ? `${nextLesson.title} →` : "Последний урок в модуле"}
+              className="btn-aubade flex items-center gap-1 px-2 py-2 text-sm disabled:opacity-30"
+            >
+              <ChevronRight size={14} />
+            </button>
+          </div>
+        </div>
+
+        {/* Right: Import / Preview / Save */}
+        <div className="flex items-center gap-2">
+          <button
+            type="button"
+            onClick={importMd}
+            disabled={importing || pending}
+            className="btn-aubade flex items-center gap-1.5 px-3 py-2 text-sm"
+            title="Импортировать из .md файла Obsidian"
+            style={{ opacity: importing || pending ? 0.6 : 1 }}
+          >
+            <FileUp size={14} />
+            {importing ? "Импорт..." : "Импорт .md"}
+          </button>
+          <a
+            href={`/courses/${courseSlug}/lessons/${lesson.id}`}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="btn-aubade flex items-center gap-1.5 px-3 py-2 text-sm"
+            title="Просмотр как студент"
+          >
+            <Eye size={14} />
+            Просмотр
+          </a>
+          <button
+            type="button"
+            onClick={handleSave}
+            disabled={pending || uploading}
+            className="btn-aubade btn-aubade-accent flex items-center gap-1.5 px-3 py-2 text-sm"
+            style={{ opacity: pending || uploading ? 0.6 : 1 }}
+            title="Сохранить урок"
+          >
+            <Save size={14} />
+            {pending ? "Сохранение..." : saved ? "Сохранено" : "Сохранить"}
+          </button>
+        </div>
+      </div>
+
+      {importError && (
+        <p className="text-xs px-3 py-2" style={{ background: "oklch(0.577 0.245 27.325 / 0.1)", color: "oklch(0.577 0.245 27.325)", border: "1px solid oklch(0.577 0.245 27.325 / 0.3)" }}>
+          {importError}
+        </p>
+      )}
+
+      {/* Title */}
+      <div className="space-y-1">
+        <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+          Заголовок урока
+        </label>
+        <input
+          value={title}
+          onChange={(e) => setTitle(e.target.value)}
+          style={{ ...inputStyle, fontSize: "1.1rem", fontWeight: "700" }}
+          onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+        />
+      </div>
+
+      {/* Kinescope ID */}
+      <div className="space-y-1">
+        <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+          Kinescope Video ID
+        </label>
+        <input
+          value={kinescopeId}
+          onChange={(e) => setKinescopeId(e.target.value)}
+          placeholder="Оставьте пустым если видео нет"
+          style={{ ...inputStyle, fontFamily: "var(--font-mono)" }}
+          onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+        />
+      </div>
+
+      {/* TipTap Editor */}
+      <div className="space-y-1">
+        <label className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+          Содержимое урока
+        </label>
+
+        {/* Toolbar */}
+        <div
+          className="flex flex-wrap gap-0.5 p-2"
+          style={{ border: "2px solid var(--border)", borderBottom: "1px solid var(--border)", background: "var(--color-surface)" }}
+        >
+          {/* Text style */}
+          <ToolBtn onClick={() => editor?.chain().focus().toggleBold().run()} active={editor?.isActive("bold")}><strong>Ж</strong></ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleItalic().run()} active={editor?.isActive("italic")}><em>К</em></ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleUnderline().run()} active={editor?.isActive("underline")}><span style={{ textDecoration: "underline" }}>Ч</span></ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleStrike().run()} active={editor?.isActive("strike")}><span style={{ textDecoration: "line-through" }}>З</span></ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleCode().run()} active={editor?.isActive("code")}>`code`</ToolBtn>
+
+          <Sep />
+
+          {/* Headings */}
+          <ToolBtn onClick={() => editor?.chain().focus().toggleHeading({ level: 1 }).run()} active={editor?.isActive("heading", { level: 1 })}>H1</ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleHeading({ level: 2 }).run()} active={editor?.isActive("heading", { level: 2 })}>H2</ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleHeading({ level: 3 }).run()} active={editor?.isActive("heading", { level: 3 })}>H3</ToolBtn>
+
+          <Sep />
+
+          {/* Lists & blocks */}
+          <ToolBtn onClick={() => editor?.chain().focus().toggleBulletList().run()} active={editor?.isActive("bulletList")}>• Список</ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleOrderedList().run()} active={editor?.isActive("orderedList")}>1. Список</ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleBlockquote().run()} active={editor?.isActive("blockquote")}>&ldquo;&rdquo; Цитата</ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().toggleCodeBlock().run()} active={editor?.isActive("codeBlock")}>{'</>'} Код</ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().setHorizontalRule().run()}>── Разделитель</ToolBtn>
+
+          <Sep />
+
+          {/* Link & image */}
+          <ToolBtn onClick={addLink} active={editor?.isActive("link")}>🔗 Ссылка</ToolBtn>
+          <ToolBtn onClick={uploadImage} disabled={uploading}>{uploading ? "Загрузка..." : "🖼 Фото"}</ToolBtn>
+
+          <Sep />
+
+          {/* History */}
+          <ToolBtn onClick={() => editor?.chain().focus().undo().run()}>↩ Отменить</ToolBtn>
+          <ToolBtn onClick={() => editor?.chain().focus().redo().run()}>↪ Повторить</ToolBtn>
+        </div>
+
+        {/* Editor content */}
+        <div style={{ border: "2px solid var(--border)", borderTop: "none", background: "var(--background)" }}>
+          <EditorContent editor={editor} />
+        </div>
+      </div>
+    </div>
+  );
+}
+
+function Sep() {
+  return <div className="w-px mx-1 self-stretch" style={{ background: "var(--border)" }} />;
+}
+
+function ToolBtn({
+  onClick,
+  active,
+  disabled,
+  children,
+}: {
+  onClick: () => void;
+  active?: boolean;
+  disabled?: boolean;
+  children: React.ReactNode;
+}) {
+  return (
+    <button
+      type="button"
+      onClick={onClick}
+      disabled={disabled}
+      className="px-2 py-1 text-xs transition-colors disabled:opacity-50"
+      style={{
+        background: active ? "var(--foreground)" : "transparent",
+        color: active ? "var(--background)" : "var(--foreground)",
+        border: "1px solid transparent",
+      }}
+      onMouseEnter={(e) => { if (!active) e.currentTarget.style.background = "var(--border)"; }}
+      onMouseLeave={(e) => { if (!active) e.currentTarget.style.background = "transparent"; }}
+    >
+      {children}
+    </button>
+  );
+}

src/components/admin/lesson-files-manager.tsx

@@ -0,0 +1,72 @@
+"use client";
+
+import { useState } from "react";
+import { Button } from "@/components/ui/button";
+
+interface LessonFile {
+  id: string;
+  name: string;
+  url: string;
+  size: number;
+}
+
+export function LessonFilesManager({ lessonId, initialFiles }: { lessonId: string; initialFiles: LessonFile[] }) {
+  const [files, setFiles] = useState(initialFiles);
+  const [uploading, setUploading] = useState(false);
+
+  async function handleUpload(e: React.ChangeEvent<HTMLInputElement>) {
+    const file = e.target.files?.[0];
+    if (!file) return;
+    setUploading(true);
+    const fd = new FormData();
+    fd.append("file", file);
+    fd.append("lessonId", lessonId);
+    const res = await fetch("/api/admin/lesson-files", { method: "POST", body: fd });
+    const created = await res.json();
+    if (created.id) setFiles((prev) => [...prev, created]);
+    setUploading(false);
+    e.target.value = "";
+  }
+
+  async function handleDelete(fileId: string) {
+    if (!confirm("Удалить файл?")) return;
+    await fetch("/api/admin/lesson-files", {
+      method: "DELETE",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ fileId }),
+    });
+    setFiles((prev) => prev.filter((f) => f.id !== fileId));
+  }
+
+  function formatSize(bytes: number) {
+    if (bytes < 1024) return `${bytes} Б`;
+    if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} КБ`;
+    return `${(bytes / 1024 / 1024).toFixed(1)} МБ`;
+  }
+
+  return (
+    <div className="space-y-3">
+      {files.length > 0 && (
+        <div className="space-y-2">
+          {files.map((f) => (
+            <div key={f.id} className="flex items-center gap-3 px-3 py-2.5 text-sm" style={{ border: "2px solid var(--border)", background: "var(--color-surface)" }}>
+              <span className="text-base">📎</span>
+              <a href={f.url} target="_blank" rel="noopener noreferrer" className="flex-1 underline font-medium">{f.name}</a>
+              <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>{formatSize(f.size)}</span>
+              <button onClick={() => handleDelete(f.id)} className="text-xs" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+                Удалить
+              </button>
+            </div>
+          ))}
+        </div>
+      )}
+      <div className="flex items-center gap-3">
+        <label className="btn-aubade text-xs cursor-pointer">
+          {uploading ? "Загрузка..." : "+ Добавить файл"}
+          <input type="file" className="sr-only" onChange={handleUpload} disabled={uploading} />
+        </label>
+        <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>PDF, ZIP, DOCX, XLSX — до 100 МБ</span>
+      </div>
+    </div>
+  );
+}

src/components/admin/settings-form.tsx

@@ -0,0 +1,450 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { Save } from "lucide-react";
+import { saveSettings } from "@/app/admin/settings/actions";
+import type { Settings } from "@/lib/settings";
+
+// ── Small primitives ──────────────────────────────────────────────────────────
+
+const inputStyle = {
+  border: "2px solid var(--border)",
+  background: "var(--background)",
+  outline: "none",
+  width: "100%",
+  padding: "0.5rem 0.75rem",
+  fontSize: "0.875rem",
+  fontFamily: "inherit",
+} as React.CSSProperties;
+
+const focusHandlers = {
+  onFocus: (e: React.FocusEvent<HTMLInputElement | HTMLTextAreaElement>) =>
+    (e.currentTarget.style.borderColor = "var(--foreground)"),
+  onBlur: (e: React.FocusEvent<HTMLInputElement | HTMLTextAreaElement>) =>
+    (e.currentTarget.style.borderColor = "var(--border)"),
+};
+
+function Section({
+  title,
+  hint,
+  children,
+}: {
+  title: string;
+  hint?: string;
+  children: React.ReactNode;
+}) {
+  return (
+    <div className="card-aubade p-6 space-y-5">
+      <div>
+        <h2
+          className="text-xs font-bold uppercase tracking-widest"
+          style={{ color: "var(--muted-foreground)" }}
+        >
+          {title}
+        </h2>
+        {hint && (
+          <p className="text-xs mt-1" style={{ color: "var(--muted-foreground)" }}>
+            {hint}
+          </p>
+        )}
+      </div>
+      {children}
+    </div>
+  );
+}
+
+function Field({
+  label,
+  hint,
+  children,
+}: {
+  label: string;
+  hint?: string;
+  children: React.ReactNode;
+}) {
+  return (
+    <div className="space-y-1">
+      <label
+        className="text-xs font-bold uppercase tracking-widest"
+        style={{ color: "var(--muted-foreground)" }}
+      >
+        {label}
+      </label>
+      {hint && (
+        <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+          {hint}
+        </p>
+      )}
+      {children}
+    </div>
+  );
+}
+
+function Toggle({
+  label,
+  hint,
+  checked,
+  onChange,
+}: {
+  label: string;
+  hint?: string;
+  checked: boolean;
+  onChange: (v: boolean) => void;
+}) {
+  return (
+    <div className="flex items-start gap-3">
+      <button
+        type="button"
+        role="switch"
+        aria-checked={checked}
+        onClick={() => onChange(!checked)}
+        className="mt-0.5 flex-shrink-0"
+      >
+        <span
+          className="relative inline-block w-10 h-6 transition-colors"
+          style={{
+            background: checked ? "var(--accent)" : "var(--border)",
+            border: "2px solid var(--foreground)",
+          }}
+        >
+          <span
+            className="absolute top-0.5 w-4 h-4 transition-transform"
+            style={{
+              background: "var(--foreground)",
+              left: "2px",
+              transform: checked ? "translateX(16px)" : "translateX(0)",
+            }}
+          />
+        </span>
+      </button>
+      <div>
+        <p className="text-sm font-medium" style={{ color: "var(--foreground)" }}>
+          {label}
+        </p>
+        {hint && (
+          <p className="text-xs mt-0.5" style={{ color: "var(--muted-foreground)" }}>
+            {hint}
+          </p>
+        )}
+      </div>
+    </div>
+  );
+}
+
+function SelectField({
+  label,
+  hint,
+  value,
+  onChange,
+  options,
+}: {
+  label: string;
+  hint?: string;
+  value: string;
+  onChange: (v: string) => void;
+  options: { value: string; label: string }[];
+}) {
+  return (
+    <Field label={label} hint={hint}>
+      <select
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+        style={{
+          ...inputStyle,
+          appearance: "none",
+          cursor: "pointer",
+        }}
+        onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+        onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+      >
+        {options.map((o) => (
+          <option key={o.value} value={o.value}>
+            {o.label}
+          </option>
+        ))}
+      </select>
+    </Field>
+  );
+}
+
+// ── Main form ─────────────────────────────────────────────────────────────────
+
+export function SettingsForm({ initial }: { initial: Settings }) {
+  const [s, setS] = useState(initial);
+  const [saved, setSaved] = useState(false);
+  const [pending, startTransition] = useTransition();
+
+  function set(key: keyof Settings, value: string) {
+    setS((prev) => ({ ...prev, [key]: value }));
+  }
+
+  function bool(key: keyof Settings) {
+    return s[key] === "true";
+  }
+
+  function handleSave() {
+    startTransition(async () => {
+      await saveSettings(s);
+      setSaved(true);
+      setTimeout(() => setSaved(false), 2000);
+    });
+  }
+
+  return (
+    <div className="space-y-5">
+      {/* Save button */}
+      <div className="flex justify-end">
+        <button
+          type="button"
+          onClick={handleSave}
+          disabled={pending}
+          className="btn-aubade btn-aubade-accent flex items-center gap-1.5 px-4 py-2 text-sm"
+          style={{ opacity: pending ? 0.6 : 1 }}
+        >
+          <Save size={14} />
+          {pending ? "Сохранение..." : saved ? "Сохранено ✓" : "Сохранить настройки"}
+        </button>
+      </div>
+
+      {/* ── 1. Основное ── */}
+      <Section title="Основное">
+        <Field label="Название школы" hint="Отображается в заголовке браузера, письмах и подписях">
+          <input
+            value={s.schoolName}
+            onChange={(e) => set("schoolName", e.target.value)}
+            style={inputStyle}
+            {...focusHandlers}
+          />
+        </Field>
+        <Field label="Описание школы" hint="Мета-тег description для поисковых систем">
+          <textarea
+            value={s.schoolDescription}
+            onChange={(e) => set("schoolDescription", e.target.value)}
+            rows={2}
+            style={{ ...inputStyle, resize: "vertical" }}
+            {...focusHandlers}
+          />
+        </Field>
+        <Field label="Ключевые слова" hint="Мета-тег keywords, через запятую">
+          <input
+            value={s.schoolKeywords}
+            onChange={(e) => set("schoolKeywords", e.target.value)}
+            placeholder="obsidian, pkm, second brain"
+            style={inputStyle}
+            {...focusHandlers}
+          />
+        </Field>
+        <div className="space-y-3 pt-1">
+          <Toggle
+            label="Режим технических работ"
+            hint="Ученики увидят страницу-заглушку. Администраторы входят в обычном режиме."
+            checked={bool("maintenanceMode")}
+            onChange={(v) => set("maintenanceMode", v ? "true" : "false")}
+          />
+          <Toggle
+            label="Открытая регистрация"
+            hint="Если выключено — форма регистрации недоступна, новые аккаунты создаёт только администратор."
+            checked={bool("registrationEnabled")}
+            onChange={(v) => set("registrationEnabled", v ? "true" : "false")}
+          />
+        </div>
+      </Section>
+
+      {/* ── 2. Уведомления ── */}
+      <Section
+        title="Уведомления"
+        hint="Кому отправлять системные письма о новых ДЗ, регистрациях и вопросах учеников."
+      >
+        <Field
+          label="Email(ы) для уведомлений"
+          hint="По одному адресу на строку. Если пусто — письма не отправляются."
+        >
+          <textarea
+            value={s.notificationEmails}
+            onChange={(e) => set("notificationEmails", e.target.value)}
+            rows={3}
+            placeholder={"admin@school.ru\ncurator@school.ru"}
+            style={{ ...inputStyle, resize: "vertical", fontFamily: "var(--font-mono)" }}
+            {...focusHandlers}
+          />
+        </Field>
+        <div className="space-y-3 pt-1">
+          <Toggle
+            label="Уведомлять о новом домашнем задании"
+            checked={bool("notifyOnHomework")}
+            onChange={(v) => set("notifyOnHomework", v ? "true" : "false")}
+          />
+          <Toggle
+            label="Уведомлять о новой регистрации ученика"
+            checked={bool("notifyOnRegistration")}
+            onChange={(v) => set("notifyOnRegistration", v ? "true" : "false")}
+          />
+          <Toggle
+            label="Уведомлять ученика о полученном фидбеке"
+            checked={bool("notifyStudentOnFeedback")}
+            onChange={(v) => set("notifyStudentOnFeedback", v ? "true" : "false")}
+          />
+        </div>
+      </Section>
+
+      {/* ── 3. Данные ученика ── */}
+      <Section title="Данные ученика" hint="Поля при регистрации и требования к аккаунту.">
+        <Toggle
+          label="Требовать подтверждение email"
+          hint="Пока email не подтверждён — ученик не может войти в личный кабинет."
+          checked={bool("requireEmailVerification")}
+          onChange={(v) => set("requireEmailVerification", v ? "true" : "false")}
+        />
+        <SelectField
+          label="Фамилия при регистрации"
+          value={s.lastNameField}
+          onChange={(v) => set("lastNameField", v)}
+          options={[
+            { value: "required", label: "Обязательная" },
+            { value: "optional", label: "Необязательная" },
+            { value: "hidden", label: "Не показывать" },
+          ]}
+        />
+        <SelectField
+          label="Телефон при регистрации"
+          value={s.phoneField}
+          onChange={(v) => set("phoneField", v)}
+          options={[
+            { value: "required", label: "Обязательный" },
+            { value: "optional", label: "Необязательный" },
+            { value: "hidden", label: "Не показывать" },
+          ]}
+        />
+      </Section>
+
+      {/* ── 4. Юридические документы ── */}
+      <Section
+        title="Юридические документы"
+        hint="Ссылки на внешние документы (Google Docs, Notion и т.п.)."
+      >
+        <Field label="Политика конфиденциальности (URL)">
+          <input
+            value={s.privacyPolicyUrl}
+            onChange={(e) => set("privacyPolicyUrl", e.target.value)}
+            placeholder="https://..."
+            style={{ ...inputStyle, fontFamily: "var(--font-mono)" }}
+            {...focusHandlers}
+          />
+        </Field>
+        <Field label="Согласие на обработку персональных данных (URL)">
+          <input
+            value={s.termsUrl}
+            onChange={(e) => set("termsUrl", e.target.value)}
+            placeholder="https://..."
+            style={{ ...inputStyle, fontFamily: "var(--font-mono)" }}
+            {...focusHandlers}
+          />
+        </Field>
+        <Field label="Договор-оферта (URL)">
+          <input
+            value={s.offerUrl}
+            onChange={(e) => set("offerUrl", e.target.value)}
+            placeholder="https://..."
+            style={{ ...inputStyle, fontFamily: "var(--font-mono)" }}
+            {...focusHandlers}
+          />
+        </Field>
+        <Toggle
+          label="Чекбокс «Я принимаю условия» на форме регистрации"
+          hint="Ученик обязан поставить галочку перед отправкой формы."
+          checked={bool("showTermsCheckbox")}
+          onChange={(v) => set("showTermsCheckbox", v ? "true" : "false")}
+        />
+        <Field
+          label="Реквизиты организации"
+          hint="Отображаются в подвале личного кабинета ученика."
+        >
+          <textarea
+            value={s.orgRequisites}
+            onChange={(e) => set("orgRequisites", e.target.value)}
+            rows={3}
+            placeholder={"ИП Иванов Иван Иванович\nИНН 123456789012\nОГРНИП 123456789012345"}
+            style={{ ...inputStyle, resize: "vertical" }}
+            {...focusHandlers}
+          />
+        </Field>
+      </Section>
+
+      {/* ── 5. Права куратора ── */}
+      <Section title="Права куратора">
+        <SelectField
+          label="Куратор видит домашние задания"
+          value={s.curatorHomeworkScope}
+          onChange={(v) => set("curatorHomeworkScope", v)}
+          options={[
+            { value: "all", label: "По всем курсам" },
+            { value: "assigned", label: "Только по назначенным курсам" },
+          ]}
+        />
+        <div className="space-y-3 pt-1">
+          <Toggle
+            label="Куратор может отвечать на вопросы учеников"
+            checked={bool("curatorCanAnswerQuestions")}
+            onChange={(v) => set("curatorCanAnswerQuestions", v ? "true" : "false")}
+          />
+          <Toggle
+            label="Куратор видит список всех студентов"
+            checked={bool("curatorCanSeeStudents")}
+            onChange={(v) => set("curatorCanSeeStudents", v ? "true" : "false")}
+          />
+        </div>
+      </Section>
+
+      {/* ── 6. Вставка кода ── */}
+      <Section
+        title="Вставка кода"
+        hint="Произвольный HTML/JS — Яндекс.Метрика, Google Analytics, виджеты. Код добавляется на каждую страницу."
+      >
+        <Field label="Код в <head>" hint="Счётчики, пиксели, мета-теги">
+          <textarea
+            value={s.headCode}
+            onChange={(e) => set("headCode", e.target.value)}
+            rows={4}
+            placeholder={"<!-- Яндекс.Метрика -->\n<script>...</script>"}
+            style={{
+              ...inputStyle,
+              resize: "vertical",
+              fontFamily: "var(--font-mono)",
+              fontSize: "0.8rem",
+            }}
+            {...focusHandlers}
+          />
+        </Field>
+        <Field label="Код в <body>" hint="Чаты поддержки, виджеты">
+          <textarea
+            value={s.bodyCode}
+            onChange={(e) => set("bodyCode", e.target.value)}
+            rows={4}
+            placeholder={"<!-- JivoSite / Crisp / etc -->\n<script>...</script>"}
+            style={{
+              ...inputStyle,
+              resize: "vertical",
+              fontFamily: "var(--font-mono)",
+              fontSize: "0.8rem",
+            }}
+            {...focusHandlers}
+          />
+        </Field>
+      </Section>
+
+      {/* Bottom save button */}
+      <div className="flex justify-end pb-4">
+        <button
+          type="button"
+          onClick={handleSave}
+          disabled={pending}
+          className="btn-aubade btn-aubade-accent flex items-center gap-1.5 px-4 py-2 text-sm"
+          style={{ opacity: pending ? 0.6 : 1 }}
+        >
+          <Save size={14} />
+          {pending ? "Сохранение..." : saved ? "Сохранено ✓" : "Сохранить настройки"}
+        </button>
+      </div>
+    </div>
+  );
+}

src/components/admin/sortable-lessons.tsx

@@ -0,0 +1,299 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import {
+  DndContext,
+  closestCenter,
+  PointerSensor,
+  useSensor,
+  useSensors,
+  DragEndEvent,
+} from "@dnd-kit/core";
+import {
+  SortableContext,
+  verticalListSortingStrategy,
+  useSortable,
+  arrayMove,
+} from "@dnd-kit/sortable";
+import { CSS } from "@dnd-kit/utilities";
+import Link from "next/link";
+import { Eye, EyeOff, Video } from "lucide-react";
+import {
+  createLesson,
+  deleteLesson,
+  updateLesson,
+  reorderLessons,
+  toggleLessonPublished,
+  moveLessonToModule,
+} from "@/app/admin/courses/[courseId]/modules/[moduleId]/actions";
+
+interface Lesson {
+  id: string;
+  title: string;
+  order: number;
+  published: boolean;
+  kinescopeId: string | null;
+}
+
+interface OtherModule {
+  id: string;
+  title: string;
+}
+
+function SortableLesson({
+  lesson,
+  courseId,
+  moduleId,
+  otherModules,
+}: {
+  lesson: Lesson;
+  courseId: string;
+  moduleId: string;
+  otherModules: OtherModule[];
+}) {
+  const [editing, setEditing] = useState(false);
+  const [editValue, setEditValue] = useState(lesson.title);
+  const [pending, startTransition] = useTransition();
+  const { attributes, listeners, setNodeRef, transform, transition, isDragging } =
+    useSortable({ id: lesson.id });
+
+  const style = {
+    transform: CSS.Transform.toString(transform),
+    transition,
+    opacity: isDragging ? 0.4 : 1,
+  };
+
+  function handleUpdate(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    const fd = new FormData(e.currentTarget);
+    startTransition(() => updateLesson(lesson.id, courseId, moduleId, fd));
+    setEditing(false);
+  }
+
+  function handleDelete() {
+    if (!confirm(`Удалить урок "${lesson.title}"?`)) return;
+    startTransition(() => deleteLesson(lesson.id, courseId, moduleId));
+  }
+
+  function handleTogglePublished() {
+    startTransition(() => toggleLessonPublished(lesson.id, courseId, moduleId, lesson.published));
+  }
+
+  function handleMove(targetModuleId: string) {
+    if (!targetModuleId) return;
+    startTransition(() => moveLessonToModule(lesson.id, targetModuleId, courseId, moduleId));
+  }
+
+  return (
+    <div
+      ref={setNodeRef}
+      style={{ ...style, border: "2px solid var(--border)", background: "var(--color-surface)", opacity: pending ? 0.5 : 1 }}
+      className="flex items-center gap-2 px-3 py-2.5"
+    >
+      {/* Drag handle */}
+      <button
+        type="button"
+        {...attributes}
+        {...listeners}
+        className="cursor-grab active:cursor-grabbing text-lg select-none shrink-0"
+        style={{ color: "var(--muted-foreground)" }}
+        aria-label="Перетащить"
+      >
+        ⠿
+      </button>
+
+      {/* Kinescope indicator */}
+      <span
+        title={lesson.kinescopeId ? `Kinescope: ${lesson.kinescopeId}` : "Без видео"}
+        className="shrink-0"
+        style={{ color: lesson.kinescopeId ? "#3A6A3A" : "var(--border)" }}
+      >
+        <Video size={13} />
+      </span>
+
+      {editing ? (
+        <form onSubmit={handleUpdate} className="flex items-center gap-2 flex-1">
+          <input
+            name="title"
+            value={editValue}
+            onChange={(e) => setEditValue(e.target.value)}
+            autoFocus
+            required
+            className="flex-1 px-2 py-1 text-sm"
+            style={{ border: "2px solid var(--foreground)", background: "var(--background)", outline: "none" }}
+          />
+          <button type="submit" disabled={pending} className="btn-aubade text-xs px-3 py-1">
+            Сохранить
+          </button>
+          <button
+            type="button"
+            onClick={() => { setEditing(false); setEditValue(lesson.title); }}
+            className="text-xs px-3 py-1"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            Отмена
+          </button>
+        </form>
+      ) : (
+        <>
+          <span className="flex-1 text-sm truncate">{lesson.title}</span>
+
+          {/* Published toggle */}
+          <button
+            type="button"
+            onClick={handleTogglePublished}
+            disabled={pending}
+            title={lesson.published ? "Скрыть" : "Опубликовать"}
+            className="shrink-0 flex items-center gap-1 text-xs px-2 py-0.5 transition-opacity hover:opacity-70"
+            style={{
+              border: "1px solid var(--border)",
+              background: lesson.published ? "var(--accent)" : "transparent",
+              color: lesson.published ? "var(--foreground)" : "var(--muted-foreground)",
+            }}
+          >
+            {lesson.published ? <Eye size={11} /> : <EyeOff size={11} />}
+            {lesson.published ? "Опубл." : "Черновик"}
+          </button>
+
+          {/* Edit */}
+          <Link
+            href={`/admin/courses/${courseId}/modules/${moduleId}/lessons/${lesson.id}`}
+            className="btn-aubade text-xs px-3 py-1 shrink-0"
+          >
+            Ред. →
+          </Link>
+
+          {/* Rename */}
+          <button
+            type="button"
+            onClick={() => setEditing(true)}
+            className="text-xs shrink-0"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            Переим.
+          </button>
+
+          {/* Move to module */}
+          {otherModules.length > 0 && (
+            <select
+              defaultValue=""
+              onChange={(e) => handleMove(e.target.value)}
+              className="text-xs shrink-0"
+              style={{
+                border: "1px solid var(--border)",
+                background: "var(--background)",
+                color: "var(--muted-foreground)",
+                padding: "2px 4px",
+                cursor: "pointer",
+                maxWidth: 120,
+              }}
+              title="Переместить в модуль"
+            >
+              <option value="" disabled>Переместить…</option>
+              {otherModules.map((m) => (
+                <option key={m.id} value={m.id}>{m.title}</option>
+              ))}
+            </select>
+          )}
+
+          {/* Delete */}
+          <button
+            type="button"
+            onClick={handleDelete}
+            disabled={pending}
+            className="text-xs shrink-0"
+            style={{ color: "oklch(0.577 0.245 27.325)" }}
+          >
+            Удалить
+          </button>
+        </>
+      )}
+    </div>
+  );
+}
+
+export function SortableLessons({
+  courseId,
+  moduleId,
+  lessons,
+  otherModules = [],
+}: {
+  courseId: string;
+  moduleId: string;
+  lessons: Lesson[];
+  otherModules?: OtherModule[];
+}) {
+  const [items, setItems] = useState(lessons);
+  const [creating, startTransition] = useTransition();
+
+  const sensors = useSensors(useSensor(PointerSensor));
+
+  function handleDragEnd(event: DragEndEvent) {
+    const { active, over } = event;
+    if (!over || active.id === over.id) return;
+    const oldIndex = items.findIndex((l) => l.id === active.id);
+    const newIndex = items.findIndex((l) => l.id === over.id);
+    const newItems = arrayMove(items, oldIndex, newIndex);
+    setItems(newItems);
+    startTransition(() => reorderLessons(moduleId, courseId, newItems.map((l) => l.id)));
+  }
+
+  function handleCreate(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    const fd = new FormData(e.currentTarget);
+    e.currentTarget.reset();
+    startTransition(() => createLesson(moduleId, courseId, fd));
+  }
+
+  return (
+    <div className="space-y-2">
+      <DndContext sensors={sensors} collisionDetection={closestCenter} onDragEnd={handleDragEnd}>
+        <SortableContext items={items.map((l) => l.id)} strategy={verticalListSortingStrategy}>
+          {items.map((lesson) => (
+            <SortableLesson
+              key={lesson.id}
+              lesson={lesson}
+              courseId={courseId}
+              moduleId={moduleId}
+              otherModules={otherModules}
+            />
+          ))}
+        </SortableContext>
+      </DndContext>
+
+      {items.length === 0 && (
+        <p className="text-sm py-3" style={{ color: "var(--muted-foreground)" }}>
+          Уроков пока нет. Добавьте первый.
+        </p>
+      )}
+
+      {/* Quick create form */}
+      <form onSubmit={handleCreate} className="pt-3 space-y-2">
+        <div className="flex gap-2">
+          <input
+            name="title"
+            placeholder="Название урока"
+            required
+            disabled={creating}
+            className="flex-1 max-w-xs px-3 py-2 text-sm"
+            style={{ border: "2px solid var(--border)", background: "var(--background)", outline: "none" }}
+            onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+            onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+          />
+          <input
+            name="kinescopeId"
+            placeholder="Kinescope ID (опционально)"
+            disabled={creating}
+            className="flex-1 max-w-xs px-3 py-2 text-sm font-mono"
+            style={{ border: "2px solid var(--border)", background: "var(--background)", outline: "none" }}
+            onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+            onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+          />
+          <button type="submit" disabled={creating} className="btn-aubade text-xs px-4 py-2 shrink-0">
+            {creating ? "Создание..." : "+ Урок"}
+          </button>
+        </div>
+      </form>
+    </div>
+  );
+}

src/components/admin/sortable-modules.tsx

@@ -0,0 +1,207 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import {
+  DndContext,
+  closestCenter,
+  PointerSensor,
+  useSensor,
+  useSensors,
+  DragEndEvent,
+} from "@dnd-kit/core";
+import {
+  SortableContext,
+  verticalListSortingStrategy,
+  useSortable,
+  arrayMove,
+} from "@dnd-kit/sortable";
+import { CSS } from "@dnd-kit/utilities";
+import Link from "next/link";
+import { createModule, deleteModule, updateModule, reorderModules } from "@/app/admin/courses/[courseId]/actions";
+
+interface Module {
+  id: string;
+  title: string;
+  description: string | null;
+  order: number;
+  _count: { lessons: number };
+}
+
+function SortableModule({ mod, courseId }: { mod: Module; courseId: string }) {
+  const [editing, setEditing] = useState(false);
+  const [editValue, setEditValue] = useState(mod.title);
+  const [editDesc, setEditDesc] = useState(mod.description ?? "");
+  const [pending, startTransition] = useTransition();
+  const { attributes, listeners, setNodeRef, transform, transition, isDragging } =
+    useSortable({ id: mod.id });
+
+  const style = {
+    transform: CSS.Transform.toString(transform),
+    transition,
+    opacity: isDragging ? 0.4 : 1,
+  };
+
+  function handleUpdate(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    const fd = new FormData(e.currentTarget);
+    startTransition(() => updateModule(mod.id, courseId, fd));
+    setEditing(false);
+  }
+
+  function handleDelete() {
+    if (!confirm(`Удалить модуль "${mod.title}"? Все уроки будут удалены.`)) return;
+    startTransition(() => deleteModule(mod.id, courseId));
+  }
+
+  return (
+    <div
+      ref={setNodeRef}
+      style={{ ...style, border: "2px solid var(--border)", background: "var(--color-surface)" }}
+      className="flex items-center gap-3 px-4 py-3"
+    >
+      <button
+        type="button"
+        {...attributes}
+        {...listeners}
+        className="cursor-grab active:cursor-grabbing text-lg select-none"
+        style={{ color: "var(--muted-foreground)" }}
+        aria-label="Перетащить"
+      >
+        ⠿
+      </button>
+
+      {editing ? (
+        <form onSubmit={handleUpdate} className="flex flex-col gap-2 flex-1">
+          <div className="flex items-center gap-2">
+            <input
+              name="title"
+              value={editValue}
+              onChange={(e) => setEditValue(e.target.value)}
+              autoFocus
+              required
+              placeholder="Название модуля"
+              className="flex-1 px-2 py-1 text-sm"
+              style={{ border: "2px solid var(--foreground)", background: "var(--background)", outline: "none" }}
+            />
+            <button type="submit" disabled={pending} className="btn-aubade text-xs px-3 py-1 shrink-0">
+              Сохранить
+            </button>
+            <button
+              type="button"
+              onClick={() => { setEditing(false); setEditValue(mod.title); setEditDesc(mod.description ?? ""); }}
+              className="text-xs px-3 py-1 shrink-0"
+              style={{ color: "var(--muted-foreground)" }}
+            >
+              Отмена
+            </button>
+          </div>
+          <textarea
+            name="description"
+            value={editDesc}
+            onChange={(e) => setEditDesc(e.target.value)}
+            placeholder="Описание модуля (опционально)"
+            rows={2}
+            className="w-full px-2 py-1 text-sm resize-none"
+            style={{ border: "1px solid var(--border)", background: "var(--background)", outline: "none" }}
+          />
+        </form>
+      ) : (
+        <>
+          <div className="flex-1 min-w-0">
+            <span className="font-medium text-sm">{mod.title}</span>
+            {mod.description && (
+              <p className="text-xs truncate mt-0.5" style={{ color: "var(--muted-foreground)" }}>
+                {mod.description}
+              </p>
+            )}
+          </div>
+          <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+            {mod._count.lessons} {mod._count.lessons === 1 ? "урок" : mod._count.lessons < 5 ? "урока" : "уроков"}
+          </span>
+          <Link
+            href={`/admin/courses/${courseId}/modules/${mod.id}`}
+            className="btn-aubade text-xs px-3 py-1"
+          >
+            Уроки →
+          </Link>
+          <button
+            type="button"
+            onClick={() => setEditing(true)}
+            className="text-xs"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            Переименовать
+          </button>
+          <button
+            type="button"
+            onClick={handleDelete}
+            disabled={pending}
+            className="text-xs"
+            style={{ color: "oklch(0.577 0.245 27.325)" }}
+          >
+            Удалить
+          </button>
+        </>
+      )}
+    </div>
+  );
+}
+
+export function SortableModules({ courseId, modules }: { courseId: string; modules: Module[] }) {
+  const [items, setItems] = useState(modules);
+  const [creating, startTransition] = useTransition();
+
+  const sensors = useSensors(useSensor(PointerSensor));
+
+  function handleDragEnd(event: DragEndEvent) {
+    const { active, over } = event;
+    if (!over || active.id === over.id) return;
+
+    const oldIndex = items.findIndex((m) => m.id === active.id);
+    const newIndex = items.findIndex((m) => m.id === over.id);
+    const newItems = arrayMove(items, oldIndex, newIndex);
+    setItems(newItems);
+    startTransition(() => reorderModules(courseId, newItems.map((m) => m.id)));
+  }
+
+  function handleCreate(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    const fd = new FormData(e.currentTarget);
+    e.currentTarget.reset();
+    startTransition(() => createModule(courseId, fd));
+  }
+
+  return (
+    <div className="space-y-2">
+      <DndContext sensors={sensors} collisionDetection={closestCenter} onDragEnd={handleDragEnd}>
+        <SortableContext items={items.map((m) => m.id)} strategy={verticalListSortingStrategy}>
+          {items.map((mod) => (
+            <SortableModule key={mod.id} mod={mod} courseId={courseId} />
+          ))}
+        </SortableContext>
+      </DndContext>
+
+      {items.length === 0 && (
+        <p className="text-sm py-3" style={{ color: "var(--muted-foreground)" }}>
+          Модулей пока нет. Добавьте первый.
+        </p>
+      )}
+
+      <form onSubmit={handleCreate} className="flex gap-2 pt-3">
+        <input
+          name="title"
+          placeholder="Название нового модуля"
+          required
+          disabled={creating}
+          className="flex-1 max-w-xs px-3 py-2 text-sm"
+          style={{ border: "2px solid var(--border)", background: "var(--background)", outline: "none" }}
+          onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+        />
+        <button type="submit" disabled={creating} className="btn-aubade text-xs px-4 py-2">
+          {creating ? "Создание..." : "+ Модуль"}
+        </button>
+      </form>
+    </div>
+  );
+}

src/components/admin/user-enrollment-manager.tsx

@@ -0,0 +1,137 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { bulkGrantAccess, revokeUserAccess } from "@/app/admin/users/[userId]/actions";
+
+interface Course {
+  id: string;
+  title: string;
+  published: boolean;
+}
+
+interface Enrollment {
+  courseId: string;
+  expiresAt: Date | null;
+  courseTitle: string;
+}
+
+interface Props {
+  userId: string;
+  allCourses: Course[];
+  enrollments: Enrollment[];
+}
+
+export function UserEnrollmentManager({ userId, allCourses, enrollments }: Props) {
+  const [enrolledMap, setEnrolledMap] = useState<Map<string, Date | null>>(
+    () => new Map(enrollments.map((e) => [e.courseId, e.expiresAt]))
+  );
+  const [selected, setSelected] = useState<Set<string>>(new Set());
+  const [expiryDate, setExpiryDate] = useState("");
+  const [pending, startTransition] = useTransition();
+
+  const unenrolled = allCourses.filter((c) => !enrolledMap.has(c.id));
+
+  function toggleSelect(courseId: string) {
+    setSelected((prev) => {
+      const next = new Set(prev);
+      next.has(courseId) ? next.delete(courseId) : next.add(courseId);
+      return next;
+    });
+  }
+
+  function handleBulkGrant() {
+    if (selected.size === 0) return;
+    const ids = [...selected];
+    const expiry = expiryDate || null;
+    const newMap = new Map(enrolledMap);
+    ids.forEach((id) => newMap.set(id, expiry ? new Date(expiry) : null));
+    setEnrolledMap(newMap);
+    setSelected(new Set());
+    startTransition(() => bulkGrantAccess(userId, ids, expiry));
+  }
+
+  function handleRevoke(courseId: string) {
+    const newMap = new Map(enrolledMap);
+    newMap.delete(courseId);
+    setEnrolledMap(newMap);
+    startTransition(() => revokeUserAccess(userId, courseId));
+  }
+
+  function formatExpiry(date: Date | null) {
+    if (!date) return "Бессрочно";
+    const d = new Date(date);
+    const expired = d < new Date();
+    return (
+      <span style={{ color: expired ? "oklch(0.577 0.245 27.325)" : "inherit" }}>
+        {expired ? "Истёк " : "До "}{d.toLocaleDateString("ru-RU")}
+      </span>
+    );
+  }
+
+  const enrolledCourses = allCourses.filter((c) => enrolledMap.has(c.id));
+
+  return (
+    <div className="space-y-5">
+      {/* Current enrollments */}
+      {enrolledCourses.length > 0 ? (
+        <div className="space-y-1.5">
+          {enrolledCourses.map((c) => (
+            <div key={c.id} className="flex items-center justify-between px-3 py-2.5 text-sm" style={{ border: "2px solid var(--border)", background: "var(--color-surface)" }}>
+              <span className="font-medium">{c.title}</span>
+              <div className="flex items-center gap-4">
+                <span className="text-xs">{formatExpiry(enrolledMap.get(c.id) ?? null)}</span>
+                <button onClick={() => handleRevoke(c.id)} disabled={pending} className="text-xs underline" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+                  Отозвать
+                </button>
+              </div>
+            </div>
+          ))}
+        </div>
+      ) : (
+        <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>Доступа к курсам нет</p>
+      )}
+
+      {/* Bulk grant */}
+      {unenrolled.length > 0 && (
+        <div>
+          <p className="text-xs font-bold uppercase tracking-widest mb-3" style={{ color: "var(--muted-foreground)" }}>
+            Добавить курсы
+          </p>
+          <div className="space-y-1.5 max-h-48 overflow-y-auto mb-3">
+            {unenrolled.map((c) => (
+              <label key={c.id} className="flex items-center gap-3 px-3 py-2 cursor-pointer text-sm" style={{ border: "2px solid var(--border)", background: selected.has(c.id) ? "var(--color-highlight)" : "var(--background)" }}>
+                <input
+                  type="checkbox"
+                  checked={selected.has(c.id)}
+                  onChange={() => toggleSelect(c.id)}
+                  className="accent-current"
+                />
+                <span>{c.title}</span>
+                {!c.published && (
+                  <span className="text-xs ml-auto" style={{ color: "var(--muted-foreground)" }}>черновик</span>
+                )}
+              </label>
+            ))}
+          </div>
+          {selected.size > 0 && (
+            <div className="flex items-center gap-3">
+              <div>
+                <label className="text-xs uppercase tracking-wider block mb-1" style={{ color: "var(--muted-foreground)" }}>
+                  Срок доступа
+                </label>
+                <Input type="date" value={expiryDate} onChange={(e) => setExpiryDate(e.target.value)} className="w-44" />
+              </div>
+              <div className="pt-5">
+                <button onClick={handleBulkGrant} disabled={pending} className="btn-aubade btn-aubade-accent">
+                  Дать доступ к {selected.size} курсам
+                </button>
+              </div>
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}

src/components/admin/users-search.tsx

@@ -0,0 +1,70 @@
+"use client";
+
+import { useRouter, usePathname } from "next/navigation";
+import { useTransition } from "react";
+import { Search } from "lucide-react";
+
+const inputStyle: React.CSSProperties = {
+  border: "2px solid var(--border)",
+  background: "var(--background)",
+  outline: "none",
+  padding: "0.4rem 0.75rem",
+  fontSize: "0.8rem",
+  fontFamily: "inherit",
+};
+
+export function UsersSearch({ initialSearch, initialRole }: { initialSearch: string; initialRole: string }) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const [, startTransition] = useTransition();
+
+  function update(search: string, role: string) {
+    const params = new URLSearchParams();
+    if (search) params.set("search", search);
+    if (role) params.set("role", role);
+    startTransition(() => router.push(`${pathname}?${params.toString()}`));
+  }
+
+  return (
+    <div className="flex flex-wrap gap-2 mb-4">
+      <div className="relative">
+        <Search size={13} className="absolute left-2.5 top-1/2 -translate-y-1/2" style={{ color: "var(--muted-foreground)" }} />
+        <input
+          defaultValue={initialSearch}
+          placeholder="Поиск по имени или email"
+          style={{ ...inputStyle, paddingLeft: "2rem", width: 240 }}
+          onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => {
+            e.currentTarget.style.borderColor = "var(--border)";
+            update(e.currentTarget.value.trim(), initialRole);
+          }}
+          onKeyDown={(e) => { if (e.key === "Enter") e.currentTarget.blur(); }}
+        />
+      </div>
+
+      <select
+        defaultValue={initialRole}
+        onChange={(e) => update(initialSearch, e.target.value)}
+        style={{ ...inputStyle, appearance: "none", cursor: "pointer" }}
+        onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+        onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+      >
+        <option value="">Все роли</option>
+        <option value="student">Ученики</option>
+        <option value="curator">Кураторы</option>
+        <option value="admin">Администраторы</option>
+      </select>
+
+      {(initialSearch || initialRole) && (
+        <button
+          type="button"
+          onClick={() => startTransition(() => router.push(pathname))}
+          className="text-xs px-3"
+          style={{ border: "2px solid var(--border)", color: "var(--muted-foreground)" }}
+        >
+          Сбросить
+        </button>
+      )}
+    </div>
+  );
+}

src/components/admin/users-table.tsx

@@ -0,0 +1,160 @@
+"use client";
+
+import { useState } from "react";
+import Link from "next/link";
+import { Badge } from "@/components/ui/badge";
+
+type Enrollment = {
+  courseId: string;
+  courseTitle: string;
+  expiresAt: Date | null;
+};
+
+type UserRow = {
+  id: string;
+  name: string;
+  email: string;
+  role: string;
+  emailVerified: boolean;
+  createdAt: Date;
+  enrollmentCount: number;
+  enrollments: Enrollment[];
+};
+
+const roleLabel: Record<string, string> = {
+  admin: "Администратор",
+  curator: "Куратор",
+  student: "Ученик",
+};
+
+const roleVariant: Record<string, "default" | "secondary" | "outline"> = {
+  admin: "default",
+  curator: "secondary",
+  student: "outline",
+};
+
+function UserPopup({ user }: { user: UserRow }) {
+  const now = new Date();
+  return (
+    <div
+      className="absolute z-50 right-0 top-full mt-1 w-72 p-4 space-y-3 text-sm"
+      style={{
+        background: "var(--background)",
+        border: "2px solid var(--foreground)",
+        boxShadow: "4px 4px 0 0 var(--foreground)",
+      }}
+    >
+      {/* Contact */}
+      <div className="space-y-0.5">
+        <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>Контакты</p>
+        <p className="font-mono text-xs">{user.email}</p>
+      </div>
+
+      {/* Courses */}
+      {user.enrollments.length > 0 ? (
+        <div className="space-y-1.5">
+          <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>
+            Курсы ({user.enrollments.length})
+          </p>
+          {user.enrollments.map((e) => {
+            const expired = e.expiresAt && new Date(e.expiresAt) < now;
+            return (
+              <div key={e.courseId} className="flex items-start justify-between gap-2">
+                <p className="text-xs flex-1 truncate">{e.courseTitle}</p>
+                <span
+                  className="text-xs shrink-0"
+                  style={{ color: expired ? "oklch(0.577 0.245 27.325)" : "var(--muted-foreground)" }}
+                >
+                  {e.expiresAt
+                    ? expired
+                      ? "просрочен"
+                      : `до ${new Date(e.expiresAt).toLocaleDateString("ru-RU")}`
+                    : "бессрочно"}
+                </span>
+              </div>
+            );
+          })}
+        </div>
+      ) : (
+        <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>Курсов нет</p>
+      )}
+
+      <Link
+        href={`/admin/users/${user.id}`}
+        className="block text-xs underline"
+        style={{ color: "var(--muted-foreground)" }}
+      >
+        Открыть профиль →
+      </Link>
+    </div>
+  );
+}
+
+export function UsersTable({ users }: { users: UserRow[] }) {
+  const [hoveredId, setHoveredId] = useState<string | null>(null);
+
+  return (
+    <div className="bg-white border border-slate-200 rounded-2xl overflow-visible">
+      <table className="w-full">
+        <thead>
+          <tr className="border-b border-slate-100 bg-slate-50">
+            {["Пользователь", "Роль", "Курсов", "Email подтверждён", "Зарегистрирован", ""].map((h) => (
+              <th key={h} className="text-left px-5 py-3 text-xs font-medium text-slate-500 uppercase">{h}</th>
+            ))}
+          </tr>
+        </thead>
+        <tbody>
+          {users.map((user) => (
+            <tr
+              key={user.id}
+              className="border-b last:border-0"
+              style={{ borderColor: "var(--border)" }}
+            >
+              <td className="px-5 py-3">
+                <Link
+                  href={`/admin/users/${user.id}`}
+                  className="font-medium hover:underline"
+                  style={{ color: "var(--foreground)" }}
+                >
+                  {user.name}
+                </Link>
+                <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>{user.email}</p>
+              </td>
+              <td className="px-5 py-3">
+                <Badge variant={roleVariant[user.role] ?? "outline"}>
+                  {roleLabel[user.role] ?? user.role}
+                </Badge>
+              </td>
+              <td className="px-5 py-3 text-sm text-slate-600">{user.enrollmentCount}</td>
+              <td className="px-5 py-3">
+                <span className={`text-xs font-medium ${user.emailVerified ? "text-green-600" : "text-slate-400"}`}>
+                  {user.emailVerified ? "Да" : "Нет"}
+                </span>
+              </td>
+              <td className="px-5 py-3 text-sm text-slate-400">
+                {new Date(user.createdAt).toLocaleDateString("ru-RU")}
+              </td>
+              {/* Hover popup trigger */}
+              <td className="px-3 py-3 relative">
+                <div
+                  className="relative inline-block"
+                  onMouseEnter={() => setHoveredId(user.id)}
+                  onMouseLeave={() => setHoveredId(null)}
+                >
+                  <button
+                    type="button"
+                    className="text-xs px-2 py-1"
+                    style={{ border: "1px solid var(--border)", color: "var(--muted-foreground)" }}
+                  >
+                    ···
+                  </button>
+                  {hoveredId === user.id && <UserPopup user={user} />}
+                </div>
+              </td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  );
+}

src/components/player/kinescope-player.tsx

@@ -0,0 +1,19 @@
+"use client";
+
+import KinescopeReactPlayer from "@kinescope/react-kinescope-player";
+
+interface Props {
+  videoId: string;
+}
+
+export function KinescopePlayer({ videoId }: Props) {
+  return (
+    <div className="w-full aspect-video" style={{ border: "2px solid var(--border)" }}>
+      <KinescopeReactPlayer
+        videoId={videoId}
+        width="100%"
+        height="100%"
+      />
+    </div>
+  );
+}

src/components/student/course-sidebar.tsx

@@ -0,0 +1,159 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { useState } from "react";
+
+interface Lesson {
+  id: string;
+  title: string;
+}
+
+interface Module {
+  id: string;
+  title: string;
+  lessons: Lesson[];
+}
+
+interface Course {
+  slug: string;
+  title: string;
+  modules: Module[];
+}
+
+export function CourseSidebar({
+  course,
+  completedLessonIds = new Set(),
+}: {
+  course: Course;
+  completedLessonIds?: Set<string>;
+}) {
+  const pathname = usePathname();
+  const [open, setOpen] = useState(true);
+
+  const totalLessons = course.modules.reduce((s, m) => s + m.lessons.length, 0);
+  const completedCount = course.modules
+    .flatMap((m) => m.lessons)
+    .filter((l) => completedLessonIds.has(l.id)).length;
+  const progressPct = totalLessons > 0 ? Math.round((completedCount / totalLessons) * 100) : 0;
+
+  return (
+    <>
+      {/* Mobile toggle */}
+      <button
+        className="md:hidden fixed bottom-4 right-4 z-20 btn-aubade px-3 py-2 text-sm"
+        onClick={() => setOpen(!open)}
+      >
+        {open ? "✕" : "☰ Уроки"}
+      </button>
+
+      <aside
+        className={`w-64 shrink-0 flex flex-col overflow-y-auto ${open ? "flex" : "hidden md:flex"}`}
+        style={{
+          borderRight: "2px solid var(--border)",
+          backgroundColor: "var(--background)",
+          maxHeight: "calc(100vh - 53px)",
+          position: "sticky",
+          top: "53px",
+        }}
+      >
+        {/* Course title + progress */}
+        <div className="px-4 py-4" style={{ borderBottom: "2px solid var(--border)" }}>
+          <Link
+            href={`/courses/${course.slug}`}
+            className="font-bold text-sm leading-snug block mb-1"
+            style={{ color: "var(--foreground)" }}
+          >
+            {course.title}
+          </Link>
+          <Link
+            href="/dashboard"
+            className="text-xs block underline mb-3"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            ← Все курсы
+          </Link>
+
+          {totalLessons > 0 && (
+            <div>
+              <div className="flex items-center justify-between mb-1">
+                <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                  {completedCount} из {totalLessons} уроков
+                </span>
+                <span className="text-xs font-bold" style={{ color: "var(--foreground)" }}>
+                  {progressPct}%
+                </span>
+              </div>
+              <div
+                className="h-1.5 w-full"
+                style={{ background: "var(--border)" }}
+              >
+                <div
+                  className="h-full transition-all duration-300"
+                  style={{
+                    width: `${progressPct}%`,
+                    background: progressPct === 100 ? "var(--foreground)" : "var(--accent)",
+                    border: progressPct > 0 ? "1px solid var(--foreground)" : "none",
+                  }}
+                />
+              </div>
+            </div>
+          )}
+        </div>
+
+        {/* Modules and lessons */}
+        <nav className="flex-1 py-2">
+          {course.modules.map((mod) => {
+            const modCompleted = mod.lessons.filter((l) => completedLessonIds.has(l.id)).length;
+            return (
+              <div key={mod.id}>
+                <div className="flex items-center justify-between px-4 py-2">
+                  <p
+                    className="text-xs font-bold uppercase tracking-widest"
+                    style={{ color: "var(--muted-foreground)" }}
+                  >
+                    {mod.title}
+                  </p>
+                  {mod.lessons.length > 0 && (
+                    <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                      {modCompleted}/{mod.lessons.length}
+                    </span>
+                  )}
+                </div>
+                {mod.lessons.map((lesson) => {
+                  const active = pathname.includes(lesson.id);
+                  const done = completedLessonIds.has(lesson.id);
+                  return (
+                    <Link
+                      key={lesson.id}
+                      href={`/courses/${course.slug}/lessons/${lesson.id}`}
+                      className="flex items-center gap-2 px-4 py-2 text-sm leading-snug border-l-2 transition-colors"
+                      style={{
+                        borderLeftColor: active ? "var(--foreground)" : "transparent",
+                        backgroundColor: active ? "var(--color-highlight)" : "transparent",
+                        fontWeight: active ? 600 : 400,
+                        color: done && !active ? "var(--muted-foreground)" : "var(--foreground)",
+                      }}
+                    >
+                      <span
+                        className="shrink-0 w-4 h-4 flex items-center justify-center text-xs"
+                        style={{
+                          border: `1.5px solid ${done ? "var(--foreground)" : "var(--border)"}`,
+                          background: done ? "var(--foreground)" : "transparent",
+                          color: "var(--background)",
+                        }}
+                      >
+                        {done && "✓"}
+                      </span>
+                      <span className="flex-1 leading-snug">{lesson.title}</span>
+                    </Link>
+                  );
+                })}
+              </div>
+            );
+          })}
+        </nav>
+      </aside>
+    </>
+  );
+}

src/components/student/homework-section.tsx

@@ -0,0 +1,195 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { submitHomework } from "@/app/(student)/courses/[slug]/lessons/[lessonId]/homework-actions";
+
+interface HWFile { name: string; url: string; size: number }
+
+interface Feedback {
+  id: string;
+  text: string;
+  createdAt: Date;
+  curator: { name: string };
+}
+
+interface Submission {
+  id: string;
+  text: string | null;
+  files: HWFile[];
+  submittedAt: Date;
+  feedbacks: Feedback[];
+}
+
+interface Props {
+  homework: { id: string; description: string };
+  submission: Submission | null;
+  slug: string;
+  lessonId: string;
+}
+
+function formatSize(bytes: number) {
+  if (bytes < 1024) return `${bytes} Б`;
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} КБ`;
+  return `${(bytes / 1024 / 1024).toFixed(1)} МБ`;
+}
+
+export function HomeworkSection({ homework, submission, slug, lessonId }: Props) {
+  const [text, setText] = useState(submission?.text ?? "");
+  const [files, setFiles] = useState<HWFile[]>(submission?.files ?? []);
+  const [uploading, setUploading] = useState(false);
+  const [pending, startTransition] = useTransition();
+  const [editing, setEditing] = useState(!submission);
+
+  const isReviewed = submission && submission.feedbacks.length > 0;
+
+  const inputStyle = {
+    border: "2px solid var(--border)",
+    background: "var(--background)",
+    outline: "none",
+    width: "100%",
+    padding: "0.5rem 0.75rem",
+    fontSize: "0.875rem",
+    fontFamily: "inherit",
+    resize: "vertical" as const,
+    minHeight: "140px",
+  };
+
+  async function handleFileUpload(e: React.ChangeEvent<HTMLInputElement>) {
+    const file = e.target.files?.[0];
+    if (!file) return;
+    setUploading(true);
+    const fd = new FormData();
+    fd.append("file", file);
+    const res = await fetch("/api/student/homework-upload", { method: "POST", body: fd });
+    const data = await res.json();
+    if (data.url) setFiles((prev) => [...prev, data]);
+    setUploading(false);
+    e.target.value = "";
+  }
+
+  function removeFile(url: string) {
+    setFiles((prev) => prev.filter((f) => f.url !== url));
+  }
+
+  function handleSubmit() {
+    startTransition(() => submitHomework(homework.id, slug, lessonId, text, files));
+    setEditing(false);
+  }
+
+  return (
+    <div className="space-y-4">
+      {/* Assignment description */}
+      <div className="px-4 py-3 text-sm whitespace-pre-wrap" style={{ border: "2px solid var(--border)", background: "var(--color-surface)" }}>
+        {homework.description}
+      </div>
+
+      {/* Submitted & reviewed */}
+      {isReviewed && (
+        <div className="space-y-3">
+          <div className="space-y-2">
+            <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>Ваш ответ</p>
+            <div className="px-4 py-3 text-sm whitespace-pre-wrap opacity-70" style={{ border: "2px solid var(--border)" }}>
+              {submission!.text || "—"}
+            </div>
+          </div>
+          {submission!.feedbacks.map((fb) => (
+            <div key={fb.id} className="px-4 py-3 space-y-1" style={{ border: "2px solid var(--foreground)", background: "var(--accent)" }}>
+              <div className="flex items-center justify-between">
+                <p className="text-xs font-bold uppercase tracking-widest">Обратная связь</p>
+                <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                  {fb.curator.name} · {new Date(fb.createdAt).toLocaleDateString("ru-RU")}
+                </span>
+              </div>
+              <p className="text-sm whitespace-pre-wrap">{fb.text}</p>
+            </div>
+          ))}
+        </div>
+      )}
+
+      {/* Submitted, pending review */}
+      {submission && !isReviewed && !editing && (
+        <div className="space-y-3">
+          <div className="flex items-center justify-between">
+            <div className="flex items-center gap-2">
+              <span className="text-xs px-2 py-0.5 font-bold uppercase tracking-widest" style={{ border: "2px solid var(--border)", background: "var(--color-surface)", color: "var(--muted-foreground)" }}>
+                На проверке
+              </span>
+              <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                Сдано {new Date(submission.submittedAt).toLocaleDateString("ru-RU")}
+              </span>
+            </div>
+            <button onClick={() => setEditing(true)} className="text-xs underline" style={{ color: "var(--muted-foreground)" }}>
+              Изменить
+            </button>
+          </div>
+          {submission.text && (
+            <div className="px-4 py-3 text-sm whitespace-pre-wrap" style={{ border: "2px solid var(--border)" }}>
+              {submission.text}
+            </div>
+          )}
+          {submission.files.length > 0 && (
+            <div className="space-y-1">
+              {submission.files.map((f) => (
+                <a key={f.url} href={f.url} target="_blank" rel="noopener noreferrer"
+                  className="flex items-center gap-2 px-3 py-2 text-xs"
+                  style={{ border: "2px solid var(--border)" }}>
+                  <span>📎</span>
+                  <span className="flex-1 underline">{f.name}</span>
+                  <span style={{ color: "var(--muted-foreground)" }}>{formatSize(f.size)}</span>
+                </a>
+              ))}
+            </div>
+          )}
+        </div>
+      )}
+
+      {/* Form */}
+      {editing && !isReviewed && (
+        <div className="space-y-3">
+          <textarea
+            value={text}
+            onChange={(e) => setText(e.target.value)}
+            style={inputStyle}
+            placeholder="Напишите ваш ответ..."
+            onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+            onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+          />
+
+          {/* File list */}
+          {files.length > 0 && (
+            <div className="space-y-1">
+              {files.map((f) => (
+                <div key={f.url} className="flex items-center gap-2 px-3 py-2 text-xs" style={{ border: "2px solid var(--border)" }}>
+                  <span>📎</span>
+                  <span className="flex-1">{f.name}</span>
+                  <span style={{ color: "var(--muted-foreground)" }}>{formatSize(f.size)}</span>
+                  <button onClick={() => removeFile(f.url)} style={{ color: "oklch(0.577 0.245 27.325)" }}>✕</button>
+                </div>
+              ))}
+            </div>
+          )}
+
+          <div className="flex items-center gap-2 flex-wrap">
+            <button
+              onClick={handleSubmit}
+              disabled={pending || (!text.trim() && files.length === 0)}
+              className="btn-aubade btn-aubade-accent text-sm px-5 py-2"
+              style={{ opacity: pending || (!text.trim() && files.length === 0) ? 0.6 : 1 }}
+            >
+              {pending ? "Отправка..." : submission ? "Обновить ответ" : "Сдать работу"}
+            </button>
+            <label className="btn-aubade text-xs px-3 py-2 cursor-pointer">
+              {uploading ? "Загрузка..." : "📎 Прикрепить файл"}
+              <input type="file" className="sr-only" onChange={handleFileUpload} disabled={uploading} />
+            </label>
+            {submission && (
+              <button onClick={() => setEditing(false)} className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                Отмена
+              </button>
+            )}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

src/components/student/lesson-comments.tsx

@@ -0,0 +1,156 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { addComment, deleteComment } from "@/app/(student)/courses/[slug]/lessons/[lessonId]/comment-actions";
+
+type Comment = {
+  id: string;
+  text: string;
+  deleted: boolean;
+  createdAt: Date;
+  user: { id: string; name: string };
+};
+
+interface Props {
+  lessonId: string;
+  slug: string;
+  comments: Comment[];
+  currentUserId: string;
+  currentUserRole: string;
+}
+
+export function LessonComments({ lessonId, slug, comments, currentUserId, currentUserRole }: Props) {
+  const [text, setText] = useState("");
+  const [isPending, startTransition] = useTransition();
+  const [error, setError] = useState<string | null>(null);
+
+  const canModerate = currentUserRole === "curator" || currentUserRole === "admin";
+
+  function handleAdd(e: React.FormEvent) {
+    e.preventDefault();
+    if (!text.trim()) return;
+    setError(null);
+    startTransition(async () => {
+      try {
+        await addComment(lessonId, slug, text.trim());
+        setText("");
+      } catch {
+        setError("Не удалось отправить комментарий. Попробуйте ещё раз.");
+      }
+    });
+  }
+
+  function handleDelete(commentId: string) {
+    startTransition(async () => {
+      try {
+        await deleteComment(commentId, lessonId, slug);
+      } catch {
+        // ignore
+      }
+    });
+  }
+
+  return (
+    <div>
+      {/* Comment list */}
+      <div className="space-y-5 mb-6">
+        {comments.length === 0 && (
+          <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>
+            Пока нет комментариев. Будьте первым!
+          </p>
+        )}
+        {comments.map((comment) => (
+          <div key={comment.id} className="flex gap-3">
+            {/* Avatar */}
+            <div
+              className="w-8 h-8 shrink-0 flex items-center justify-center text-xs font-bold"
+              style={{
+                backgroundColor: "var(--accent)",
+                color: "var(--foreground)",
+                border: "2px solid var(--border)",
+              }}
+            >
+              {comment.user.name[0]?.toUpperCase() ?? "?"}
+            </div>
+
+            {/* Body */}
+            <div className="flex-1 min-w-0">
+              <div className="flex items-center gap-2 mb-1 flex-wrap">
+                <span className="text-sm font-bold">{comment.user.name}</span>
+                <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                  {new Date(comment.createdAt).toLocaleDateString("ru-RU", {
+                    day: "numeric",
+                    month: "long",
+                    year: "numeric",
+                    hour: "2-digit",
+                    minute: "2-digit",
+                  })}
+                </span>
+              </div>
+
+              {comment.deleted ? (
+                <p className="text-sm italic" style={{ color: "var(--muted-foreground)" }}>
+                  [Комментарий удалён]
+                </p>
+              ) : (
+                <p className="text-sm whitespace-pre-wrap break-words leading-relaxed">
+                  {comment.text}
+                </p>
+              )}
+
+              {!comment.deleted && (comment.user.id === currentUserId || canModerate) && (
+                <button
+                  onClick={() => handleDelete(comment.id)}
+                  disabled={isPending}
+                  className="text-xs mt-1 underline"
+                  style={{ color: "var(--muted-foreground)" }}
+                >
+                  Удалить
+                </button>
+              )}
+            </div>
+          </div>
+        ))}
+      </div>
+
+      {/* Add comment form */}
+      <form onSubmit={handleAdd}>
+        <textarea
+          value={text}
+          onChange={(e) => setText(e.target.value)}
+          placeholder="Напишите комментарий..."
+          rows={3}
+          maxLength={2000}
+          disabled={isPending}
+          className="w-full text-sm p-3 resize-y"
+          style={{
+            border: "2px solid var(--border)",
+            backgroundColor: "var(--background)",
+            color: "var(--foreground)",
+            outline: "none",
+            fontFamily: "inherit",
+          }}
+          onFocus={(e) => (e.target.style.borderColor = "var(--foreground)")}
+          onBlur={(e) => (e.target.style.borderColor = "var(--border)")}
+        />
+        {error && (
+          <p className="text-xs mt-1" style={{ color: "oklch(0.577 0.245 27.325)" }}>
+            {error}
+          </p>
+        )}
+        <div className="flex items-center justify-between mt-2">
+          <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+            {text.length > 0 ? `${text.length}/2000` : ""}
+          </span>
+          <button
+            type="submit"
+            disabled={isPending || !text.trim()}
+            className="btn-aubade btn-aubade-accent text-sm"
+          >
+            {isPending ? "Отправка..." : "Отправить"}
+          </button>
+        </div>
+      </form>
+    </div>
+  );
+}

src/components/student/lesson-complete-button.tsx

@@ -0,0 +1,29 @@
+"use client";
+
+import { useTransition } from "react";
+import { Check } from "lucide-react";
+import { toggleLessonProgress } from "@/app/(student)/courses/[slug]/lessons/[lessonId]/actions";
+
+export function LessonCompleteButton({
+  lessonId,
+  slug,
+  isCompleted,
+}: {
+  lessonId: string;
+  slug: string;
+  isCompleted: boolean;
+}) {
+  const [pending, startTransition] = useTransition();
+
+  return (
+    <button
+      onClick={() => startTransition(() => toggleLessonProgress(lessonId, slug))}
+      disabled={pending}
+      className={`btn-aubade ${isCompleted ? "btn-aubade-accent" : ""} flex items-center gap-2 px-5 py-2.5 text-sm`}
+      style={{ opacity: pending ? 0.6 : 1 }}
+    >
+      <Check size={15} strokeWidth={isCompleted ? 3 : 2} />
+      {pending ? "..." : isCompleted ? "Пройдено" : "Отметить как пройденный"}
+    </button>
+  );
+}

src/components/student/lesson-content.tsx

@@ -0,0 +1,25 @@
+"use client";
+
+import { useEditor, EditorContent } from "@tiptap/react";
+import StarterKit from "@tiptap/starter-kit";
+import Image from "@tiptap/extension-image";
+import Link from "@tiptap/extension-link";
+
+export function LessonContent({ content }: { content: object }) {
+  const editor = useEditor({
+    extensions: [
+      StarterKit,
+      Image.configure({ inline: false }),
+      Link.configure({ openOnClick: true }),
+    ],
+    content,
+    editable: false,
+    editorProps: {
+      attributes: {
+        class: "prose prose-slate max-w-none focus:outline-none",
+      },
+    },
+  });
+
+  return <EditorContent editor={editor} />;
+}

src/components/ui/alert-dialog.tsx

@@ -0,0 +1,187 @@
+"use client"
+
+import * as React from "react"
+import { AlertDialog as AlertDialogPrimitive } from "@base-ui/react/alert-dialog"
+
+import { cn } from "@/lib/utils"
+import { Button } from "@/components/ui/button"
+
+function AlertDialog({ ...props }: AlertDialogPrimitive.Root.Props) {
+  return <AlertDialogPrimitive.Root data-slot="alert-dialog" {...props} />
+}
+
+function AlertDialogTrigger({ ...props }: AlertDialogPrimitive.Trigger.Props) {
+  return (
+    <AlertDialogPrimitive.Trigger data-slot="alert-dialog-trigger" {...props} />
+  )
+}
+
+function AlertDialogPortal({ ...props }: AlertDialogPrimitive.Portal.Props) {
+  return (
+    <AlertDialogPrimitive.Portal data-slot="alert-dialog-portal" {...props} />
+  )
+}
+
+function AlertDialogOverlay({
+  className,
+  ...props
+}: AlertDialogPrimitive.Backdrop.Props) {
+  return (
+    <AlertDialogPrimitive.Backdrop
+      data-slot="alert-dialog-overlay"
+      className={cn(
+        "fixed inset-0 isolate z-50 bg-black/10 duration-100 supports-backdrop-filter:backdrop-blur-xs data-open:animate-in data-open:fade-in-0 data-closed:animate-out data-closed:fade-out-0",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDialogContent({
+  className,
+  size = "default",
+  ...props
+}: AlertDialogPrimitive.Popup.Props & {
+  size?: "default" | "sm"
+}) {
+  return (
+    <AlertDialogPortal>
+      <AlertDialogOverlay />
+      <AlertDialogPrimitive.Popup
+        data-slot="alert-dialog-content"
+        data-size={size}
+        className={cn(
+          "group/alert-dialog-content fixed top-1/2 left-1/2 z-50 grid w-full -translate-x-1/2 -translate-y-1/2 gap-4 rounded-xl bg-popover p-4 text-popover-foreground ring-1 ring-foreground/10 duration-100 outline-none data-[size=default]:max-w-xs data-[size=sm]:max-w-xs data-[size=default]:sm:max-w-sm data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95",
+          className
+        )}
+        {...props}
+      />
+    </AlertDialogPortal>
+  )
+}
+
+function AlertDialogHeader({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-dialog-header"
+      className={cn(
+        "grid grid-rows-[auto_1fr] place-items-center gap-1.5 text-center has-data-[slot=alert-dialog-media]:grid-rows-[auto_auto_1fr] has-data-[slot=alert-dialog-media]:gap-x-4 sm:group-data-[size=default]/alert-dialog-content:place-items-start sm:group-data-[size=default]/alert-dialog-content:text-left sm:group-data-[size=default]/alert-dialog-content:has-data-[slot=alert-dialog-media]:grid-rows-[auto_1fr]",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDialogFooter({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-dialog-footer"
+      className={cn(
+        "-mx-4 -mb-4 flex flex-col-reverse gap-2 rounded-b-xl border-t bg-muted/50 p-4 group-data-[size=sm]/alert-dialog-content:grid group-data-[size=sm]/alert-dialog-content:grid-cols-2 sm:flex-row sm:justify-end",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDialogMedia({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-dialog-media"
+      className={cn(
+        "mb-2 inline-flex size-10 items-center justify-center rounded-md bg-muted sm:group-data-[size=default]/alert-dialog-content:row-span-2 *:[svg:not([class*='size-'])]:size-6",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDialogTitle({
+  className,
+  ...props
+}: React.ComponentProps<typeof AlertDialogPrimitive.Title>) {
+  return (
+    <AlertDialogPrimitive.Title
+      data-slot="alert-dialog-title"
+      className={cn(
+        "font-heading text-base font-medium sm:group-data-[size=default]/alert-dialog-content:group-has-data-[slot=alert-dialog-media]/alert-dialog-content:col-start-2",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDialogDescription({
+  className,
+  ...props
+}: React.ComponentProps<typeof AlertDialogPrimitive.Description>) {
+  return (
+    <AlertDialogPrimitive.Description
+      data-slot="alert-dialog-description"
+      className={cn(
+        "text-sm text-balance text-muted-foreground md:text-pretty *:[a]:underline *:[a]:underline-offset-3 *:[a]:hover:text-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDialogAction({
+  className,
+  ...props
+}: React.ComponentProps<typeof Button>) {
+  return (
+    <Button
+      data-slot="alert-dialog-action"
+      className={cn(className)}
+      {...props}
+    />
+  )
+}
+
+function AlertDialogCancel({
+  className,
+  variant = "outline",
+  size = "default",
+  ...props
+}: AlertDialogPrimitive.Close.Props &
+  Pick<React.ComponentProps<typeof Button>, "variant" | "size">) {
+  return (
+    <AlertDialogPrimitive.Close
+      data-slot="alert-dialog-cancel"
+      className={cn(className)}
+      render={<Button variant={variant} size={size} />}
+      {...props}
+    />
+  )
+}
+
+export {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogMedia,
+  AlertDialogOverlay,
+  AlertDialogPortal,
+  AlertDialogTitle,
+  AlertDialogTrigger,
+}

src/components/ui/badge.tsx

@@ -0,0 +1,52 @@
+import { mergeProps } from "@base-ui/react/merge-props"
+import { useRender } from "@base-ui/react/use-render"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const badgeVariants = cva(
+  "group/badge inline-flex h-5 w-fit shrink-0 items-center justify-center gap-1 overflow-hidden rounded-4xl border border-transparent px-2 py-0.5 text-xs font-medium whitespace-nowrap transition-all focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 aria-invalid:border-destructive aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 [&>svg]:pointer-events-none [&>svg]:size-3!",
+  {
+    variants: {
+      variant: {
+        default: "bg-primary text-primary-foreground [a]:hover:bg-primary/80",
+        secondary:
+          "bg-secondary text-secondary-foreground [a]:hover:bg-secondary/80",
+        destructive:
+          "bg-destructive/10 text-destructive focus-visible:ring-destructive/20 dark:bg-destructive/20 dark:focus-visible:ring-destructive/40 [a]:hover:bg-destructive/20",
+        outline:
+          "border-border text-foreground [a]:hover:bg-muted [a]:hover:text-muted-foreground",
+        ghost:
+          "hover:bg-muted hover:text-muted-foreground dark:hover:bg-muted/50",
+        link: "text-primary underline-offset-4 hover:underline",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+function Badge({
+  className,
+  variant = "default",
+  render,
+  ...props
+}: useRender.ComponentProps<"span"> & VariantProps<typeof badgeVariants>) {
+  return useRender({
+    defaultTagName: "span",
+    props: mergeProps<"span">(
+      {
+        className: cn(badgeVariants({ variant }), className),
+      },
+      props
+    ),
+    render,
+    state: {
+      slot: "badge",
+      variant,
+    },
+  })
+}
+
+export { Badge, badgeVariants }

src/components/ui/button.tsx

@@ -0,0 +1,58 @@
+import { Button as ButtonPrimitive } from "@base-ui/react/button"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const buttonVariants = cva(
+  "group/button inline-flex shrink-0 items-center justify-center rounded-lg border border-transparent bg-clip-padding text-sm font-medium whitespace-nowrap transition-all outline-none select-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 active:not-aria-[haspopup]:translate-y-px disabled:pointer-events-none disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+  {
+    variants: {
+      variant: {
+        default: "bg-primary text-primary-foreground [a]:hover:bg-primary/80",
+        outline:
+          "border-border bg-background hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:border-input dark:bg-input/30 dark:hover:bg-input/50",
+        secondary:
+          "bg-secondary text-secondary-foreground hover:bg-secondary/80 aria-expanded:bg-secondary aria-expanded:text-secondary-foreground",
+        ghost:
+          "hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:hover:bg-muted/50",
+        destructive:
+          "bg-destructive/10 text-destructive hover:bg-destructive/20 focus-visible:border-destructive/40 focus-visible:ring-destructive/20 dark:bg-destructive/20 dark:hover:bg-destructive/30 dark:focus-visible:ring-destructive/40",
+        link: "text-primary underline-offset-4 hover:underline",
+      },
+      size: {
+        default:
+          "h-8 gap-1.5 px-2.5 has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2",
+        xs: "h-6 gap-1 rounded-[min(var(--radius-md),10px)] px-2 text-xs in-data-[slot=button-group]:rounded-lg has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 [&_svg:not([class*='size-'])]:size-3",
+        sm: "h-7 gap-1 rounded-[min(var(--radius-md),12px)] px-2.5 text-[0.8rem] in-data-[slot=button-group]:rounded-lg has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 [&_svg:not([class*='size-'])]:size-3.5",
+        lg: "h-9 gap-1.5 px-2.5 has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2",
+        icon: "size-8",
+        "icon-xs":
+          "size-6 rounded-[min(var(--radius-md),10px)] in-data-[slot=button-group]:rounded-lg [&_svg:not([class*='size-'])]:size-3",
+        "icon-sm":
+          "size-7 rounded-[min(var(--radius-md),12px)] in-data-[slot=button-group]:rounded-lg",
+        "icon-lg": "size-9",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+function Button({
+  className,
+  variant = "default",
+  size = "default",
+  ...props
+}: ButtonPrimitive.Props & VariantProps<typeof buttonVariants>) {
+  return (
+    <ButtonPrimitive
+      data-slot="button"
+      className={cn(buttonVariants({ variant, size, className }))}
+      {...props}
+    />
+  )
+}
+
+export { Button, buttonVariants }

src/components/ui/dialog.tsx

@@ -0,0 +1,160 @@
+"use client"
+
+import * as React from "react"
+import { Dialog as DialogPrimitive } from "@base-ui/react/dialog"
+
+import { cn } from "@/lib/utils"
+import { Button } from "@/components/ui/button"
+import { XIcon } from "lucide-react"
+
+function Dialog({ ...props }: DialogPrimitive.Root.Props) {
+  return <DialogPrimitive.Root data-slot="dialog" {...props} />
+}
+
+function DialogTrigger({ ...props }: DialogPrimitive.Trigger.Props) {
+  return <DialogPrimitive.Trigger data-slot="dialog-trigger" {...props} />
+}
+
+function DialogPortal({ ...props }: DialogPrimitive.Portal.Props) {
+  return <DialogPrimitive.Portal data-slot="dialog-portal" {...props} />
+}
+
+function DialogClose({ ...props }: DialogPrimitive.Close.Props) {
+  return <DialogPrimitive.Close data-slot="dialog-close" {...props} />
+}
+
+function DialogOverlay({
+  className,
+  ...props
+}: DialogPrimitive.Backdrop.Props) {
+  return (
+    <DialogPrimitive.Backdrop
+      data-slot="dialog-overlay"
+      className={cn(
+        "fixed inset-0 isolate z-50 bg-black/10 duration-100 supports-backdrop-filter:backdrop-blur-xs data-open:animate-in data-open:fade-in-0 data-closed:animate-out data-closed:fade-out-0",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function DialogContent({
+  className,
+  children,
+  showCloseButton = true,
+  ...props
+}: DialogPrimitive.Popup.Props & {
+  showCloseButton?: boolean
+}) {
+  return (
+    <DialogPortal>
+      <DialogOverlay />
+      <DialogPrimitive.Popup
+        data-slot="dialog-content"
+        className={cn(
+          "fixed top-1/2 left-1/2 z-50 grid w-full max-w-[calc(100%-2rem)] -translate-x-1/2 -translate-y-1/2 gap-4 rounded-xl bg-popover p-4 text-sm text-popover-foreground ring-1 ring-foreground/10 duration-100 outline-none sm:max-w-sm data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95",
+          className
+        )}
+        {...props}
+      >
+        {children}
+        {showCloseButton && (
+          <DialogPrimitive.Close
+            data-slot="dialog-close"
+            render={
+              <Button
+                variant="ghost"
+                className="absolute top-2 right-2"
+                size="icon-sm"
+              />
+            }
+          >
+            <XIcon
+            />
+            <span className="sr-only">Close</span>
+          </DialogPrimitive.Close>
+        )}
+      </DialogPrimitive.Popup>
+    </DialogPortal>
+  )
+}
+
+function DialogHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="dialog-header"
+      className={cn("flex flex-col gap-2", className)}
+      {...props}
+    />
+  )
+}
+
+function DialogFooter({
+  className,
+  showCloseButton = false,
+  children,
+  ...props
+}: React.ComponentProps<"div"> & {
+  showCloseButton?: boolean
+}) {
+  return (
+    <div
+      data-slot="dialog-footer"
+      className={cn(
+        "-mx-4 -mb-4 flex flex-col-reverse gap-2 rounded-b-xl border-t bg-muted/50 p-4 sm:flex-row sm:justify-end",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      {showCloseButton && (
+        <DialogPrimitive.Close render={<Button variant="outline" />}>
+          Close
+        </DialogPrimitive.Close>
+      )}
+    </div>
+  )
+}
+
+function DialogTitle({ className, ...props }: DialogPrimitive.Title.Props) {
+  return (
+    <DialogPrimitive.Title
+      data-slot="dialog-title"
+      className={cn(
+        "font-heading text-base leading-none font-medium",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function DialogDescription({
+  className,
+  ...props
+}: DialogPrimitive.Description.Props) {
+  return (
+    <DialogPrimitive.Description
+      data-slot="dialog-description"
+      className={cn(
+        "text-sm text-muted-foreground *:[a]:underline *:[a]:underline-offset-3 *:[a]:hover:text-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  Dialog,
+  DialogClose,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogOverlay,
+  DialogPortal,
+  DialogTitle,
+  DialogTrigger,
+}

src/components/ui/input.tsx

@@ -0,0 +1,20 @@
+import * as React from "react"
+import { Input as InputPrimitive } from "@base-ui/react/input"
+
+import { cn } from "@/lib/utils"
+
+function Input({ className, type, ...props }: React.ComponentProps<"input">) {
+  return (
+    <InputPrimitive
+      type={type}
+      data-slot="input"
+      className={cn(
+        "h-8 w-full min-w-0 rounded-lg border border-input bg-transparent px-2.5 py-1 text-base transition-colors outline-none file:inline-flex file:h-6 file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:pointer-events-none disabled:cursor-not-allowed disabled:bg-input/50 disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 md:text-sm dark:bg-input/30 dark:disabled:bg-input/80 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Input }

src/components/ui/label.tsx

@@ -0,0 +1,20 @@
+"use client"
+
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Label({ className, ...props }: React.ComponentProps<"label">) {
+  return (
+    <label
+      data-slot="label"
+      className={cn(
+        "flex items-center gap-2 text-sm leading-none font-medium select-none group-data-[disabled=true]:pointer-events-none group-data-[disabled=true]:opacity-50 peer-disabled:cursor-not-allowed peer-disabled:opacity-50",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Label }

src/components/ui/select.tsx

@@ -0,0 +1,201 @@
+"use client"
+
+import * as React from "react"
+import { Select as SelectPrimitive } from "@base-ui/react/select"
+
+import { cn } from "@/lib/utils"
+import { ChevronDownIcon, CheckIcon, ChevronUpIcon } from "lucide-react"
+
+const Select = SelectPrimitive.Root
+
+function SelectGroup({ className, ...props }: SelectPrimitive.Group.Props) {
+  return (
+    <SelectPrimitive.Group
+      data-slot="select-group"
+      className={cn("scroll-my-1 p-1", className)}
+      {...props}
+    />
+  )
+}
+
+function SelectValue({ className, ...props }: SelectPrimitive.Value.Props) {
+  return (
+    <SelectPrimitive.Value
+      data-slot="select-value"
+      className={cn("flex flex-1 text-left", className)}
+      {...props}
+    />
+  )
+}
+
+function SelectTrigger({
+  className,
+  size = "default",
+  children,
+  ...props
+}: SelectPrimitive.Trigger.Props & {
+  size?: "sm" | "default"
+}) {
+  return (
+    <SelectPrimitive.Trigger
+      data-slot="select-trigger"
+      data-size={size}
+      className={cn(
+        "flex w-fit items-center justify-between gap-1.5 rounded-lg border border-input bg-transparent py-2 pr-2 pl-2.5 text-sm whitespace-nowrap transition-colors outline-none select-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 data-placeholder:text-muted-foreground data-[size=default]:h-8 data-[size=sm]:h-7 data-[size=sm]:rounded-[min(var(--radius-md),10px)] *:data-[slot=select-value]:line-clamp-1 *:data-[slot=select-value]:flex *:data-[slot=select-value]:items-center *:data-[slot=select-value]:gap-1.5 dark:bg-input/30 dark:hover:bg-input/50 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      <SelectPrimitive.Icon
+        render={
+          <ChevronDownIcon className="pointer-events-none size-4 text-muted-foreground" />
+        }
+      />
+    </SelectPrimitive.Trigger>
+  )
+}
+
+function SelectContent({
+  className,
+  children,
+  side = "bottom",
+  sideOffset = 4,
+  align = "center",
+  alignOffset = 0,
+  alignItemWithTrigger = true,
+  ...props
+}: SelectPrimitive.Popup.Props &
+  Pick<
+    SelectPrimitive.Positioner.Props,
+    "align" | "alignOffset" | "side" | "sideOffset" | "alignItemWithTrigger"
+  >) {
+  return (
+    <SelectPrimitive.Portal>
+      <SelectPrimitive.Positioner
+        side={side}
+        sideOffset={sideOffset}
+        align={align}
+        alignOffset={alignOffset}
+        alignItemWithTrigger={alignItemWithTrigger}
+        className="isolate z-50"
+      >
+        <SelectPrimitive.Popup
+          data-slot="select-content"
+          data-align-trigger={alignItemWithTrigger}
+          className={cn("relative isolate z-50 max-h-(--available-height) w-(--anchor-width) min-w-36 origin-(--transform-origin) overflow-x-hidden overflow-y-auto rounded-lg bg-popover text-popover-foreground shadow-md ring-1 ring-foreground/10 duration-100 data-[align-trigger=true]:animate-none data-[side=bottom]:slide-in-from-top-2 data-[side=inline-end]:slide-in-from-left-2 data-[side=inline-start]:slide-in-from-right-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95", className )}
+          {...props}
+        >
+          <SelectScrollUpButton />
+          <SelectPrimitive.List>{children}</SelectPrimitive.List>
+          <SelectScrollDownButton />
+        </SelectPrimitive.Popup>
+      </SelectPrimitive.Positioner>
+    </SelectPrimitive.Portal>
+  )
+}
+
+function SelectLabel({
+  className,
+  ...props
+}: SelectPrimitive.GroupLabel.Props) {
+  return (
+    <SelectPrimitive.GroupLabel
+      data-slot="select-label"
+      className={cn("px-1.5 py-1 text-xs text-muted-foreground", className)}
+      {...props}
+    />
+  )
+}
+
+function SelectItem({
+  className,
+  children,
+  ...props
+}: SelectPrimitive.Item.Props) {
+  return (
+    <SelectPrimitive.Item
+      data-slot="select-item"
+      className={cn(
+        "relative flex w-full cursor-default items-center gap-1.5 rounded-md py-1 pr-8 pl-1.5 text-sm outline-hidden select-none focus:bg-accent focus:text-accent-foreground not-data-[variant=destructive]:focus:**:text-accent-foreground data-disabled:pointer-events-none data-disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4 *:[span]:last:flex *:[span]:last:items-center *:[span]:last:gap-2",
+        className
+      )}
+      {...props}
+    >
+      <SelectPrimitive.ItemText className="flex flex-1 shrink-0 gap-2 whitespace-nowrap">
+        {children}
+      </SelectPrimitive.ItemText>
+      <SelectPrimitive.ItemIndicator
+        render={
+          <span className="pointer-events-none absolute right-2 flex size-4 items-center justify-center" />
+        }
+      >
+        <CheckIcon className="pointer-events-none" />
+      </SelectPrimitive.ItemIndicator>
+    </SelectPrimitive.Item>
+  )
+}
+
+function SelectSeparator({
+  className,
+  ...props
+}: SelectPrimitive.Separator.Props) {
+  return (
+    <SelectPrimitive.Separator
+      data-slot="select-separator"
+      className={cn("pointer-events-none -mx-1 my-1 h-px bg-border", className)}
+      {...props}
+    />
+  )
+}
+
+function SelectScrollUpButton({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.ScrollUpArrow>) {
+  return (
+    <SelectPrimitive.ScrollUpArrow
+      data-slot="select-scroll-up-button"
+      className={cn(
+        "top-0 z-10 flex w-full cursor-default items-center justify-center bg-popover py-1 [&_svg:not([class*='size-'])]:size-4",
+        className
+      )}
+      {...props}
+    >
+      <ChevronUpIcon
+      />
+    </SelectPrimitive.ScrollUpArrow>
+  )
+}
+
+function SelectScrollDownButton({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.ScrollDownArrow>) {
+  return (
+    <SelectPrimitive.ScrollDownArrow
+      data-slot="select-scroll-down-button"
+      className={cn(
+        "bottom-0 z-10 flex w-full cursor-default items-center justify-center bg-popover py-1 [&_svg:not([class*='size-'])]:size-4",
+        className
+      )}
+      {...props}
+    >
+      <ChevronDownIcon
+      />
+    </SelectPrimitive.ScrollDownArrow>
+  )
+}
+
+export {
+  Select,
+  SelectContent,
+  SelectGroup,
+  SelectItem,
+  SelectLabel,
+  SelectScrollDownButton,
+  SelectScrollUpButton,
+  SelectSeparator,
+  SelectTrigger,
+  SelectValue,
+}

src/components/ui/sonner.tsx

@@ -0,0 +1,49 @@
+"use client"
+
+import { useTheme } from "next-themes"
+import { Toaster as Sonner, type ToasterProps } from "sonner"
+import { CircleCheckIcon, InfoIcon, TriangleAlertIcon, OctagonXIcon, Loader2Icon } from "lucide-react"
+
+const Toaster = ({ ...props }: ToasterProps) => {
+  const { theme = "system" } = useTheme()
+
+  return (
+    <Sonner
+      theme={theme as ToasterProps["theme"]}
+      className="toaster group"
+      icons={{
+        success: (
+          <CircleCheckIcon className="size-4" />
+        ),
+        info: (
+          <InfoIcon className="size-4" />
+        ),
+        warning: (
+          <TriangleAlertIcon className="size-4" />
+        ),
+        error: (
+          <OctagonXIcon className="size-4" />
+        ),
+        loading: (
+          <Loader2Icon className="size-4 animate-spin" />
+        ),
+      }}
+      style={
+        {
+          "--normal-bg": "var(--popover)",
+          "--normal-text": "var(--popover-foreground)",
+          "--normal-border": "var(--border)",
+          "--border-radius": "var(--radius)",
+        } as React.CSSProperties
+      }
+      toastOptions={{
+        classNames: {
+          toast: "cn-toast",
+        },
+      }}
+      {...props}
+    />
+  )
+}
+
+export { Toaster }

src/components/ui/textarea.tsx

@@ -0,0 +1,18 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Textarea({ className, ...props }: React.ComponentProps<"textarea">) {
+  return (
+    <textarea
+      data-slot="textarea"
+      className={cn(
+        "flex field-sizing-content min-h-16 w-full rounded-lg border border-input bg-transparent px-2.5 py-2 text-base transition-colors outline-none placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:bg-input/50 disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 md:text-sm dark:bg-input/30 dark:disabled:bg-input/80 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Textarea }

src/lib/auth.ts

@@ -3,6 +3,7 @@ import { prismaAdapter } from "better-auth/adapters/prisma";
 import { admin } from "better-auth/plugins";
 import { prisma } from "./prisma";
 import bcrypt from "bcryptjs";
+import { sendWelcomeEmail } from "./email";
 
 export const auth = betterAuth({
   database: prismaAdapter(prisma, {
@@ -16,6 +17,15 @@ export const auth = betterAuth({
       verify: ({ hash, password }) => bcrypt.compare(password, hash),
     },
   },
+  databaseHooks: {
+    user: {
+      create: {
+        after: async (user) => {
+          await sendWelcomeEmail(user.email, user.name);
+        },
+      },
+    },
+  },
   plugins: [
     admin({
       defaultRole: "student",

src/lib/email.ts

@@ -0,0 +1,191 @@
+import { Resend } from "resend";
+import { getSetting } from "./settings";
+
+function getResend() {
+  return new Resend(process.env.RESEND_API_KEY);
+}
+const FROM = process.env.EMAIL_FROM ?? "noreply@mailsend.second-brain.ru";
+const BASE_URL = process.env.BETTER_AUTH_URL ?? "https://school.second-brain.ru";
+
+async function getSchoolName() {
+  return getSetting("schoolName");
+}
+
+// ── HTML template (inline styles for maximum email client compatibility) ───────
+
+function base(content: string, schoolName = "Second Brain") {
+  return `<!DOCTYPE html>
+<html lang="ru" xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+  <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
+  <!--[if mso]><noscript><xml><o:OfficeDocumentSettings><o:PixelsPerInch>96</o:PixelsPerInch></o:OfficeDocumentSettings></xml></noscript><![endif]-->
+  <title>Second Brain</title>
+</head>
+<body style="margin:0;padding:0;background-color:#FFFFFF;font-family:Arial,Helvetica,sans-serif;color:#323232;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
+
+  <!-- Outer wrapper -->
+  <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="background-color:#FFFFFF;">
+    <tr>
+      <td align="center" style="padding:32px 16px;">
+
+        <!-- Shadow wrapper: gray bg + padding creates border+shadow illusion -->
+        <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="max-width:560px;background-color:#AAAAAA;">
+          <tr>
+            <td style="padding:2px 6px 6px 2px;">
+
+              <!-- Card -->
+              <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="background-color:#F5F5F0;">
+
+                <!-- Header -->
+                <tr>
+                  <td style="padding:20px 28px;border-bottom:2px solid #AAAAAA;background-color:#F5F5F0;">
+                    <p style="margin:0;font-family:Arial,Helvetica,sans-serif;font-size:13px;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;color:#323232;">${schoolName} · Образовательная платформа</p>
+                  </td>
+                </tr>
+
+                <!-- Body -->
+                <tr>
+                  <td style="padding:28px 28px 24px;">
+                    ${content}
+                  </td>
+                </tr>
+
+                <!-- Footer -->
+                <tr>
+                  <td style="padding:14px 28px;border-top:2px solid #AAAAAA;background-color:#F5F5F0;">
+                    <p style="margin:0;font-family:Arial,Helvetica,sans-serif;font-size:11px;color:#AAAAAA;">Это автоматическое письмо, не отвечайте на него.</p>
+                  </td>
+                </tr>
+
+              </table>
+              <!-- /Card -->
+
+            </td>
+          </tr>
+        </table>
+        <!-- /Shadow wrapper -->
+
+      </td>
+    </tr>
+  </table>
+
+</body>
+</html>`;
+}
+
+// Reusable inline styles
+const p = `style="margin:0 0 14px;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:1.65;color:#323232;"`;
+const pLast = `style="margin:0;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:1.65;color:#323232;"`;
+
+function btn(href: string, label: string) {
+  return `<table role="presentation" cellpadding="0" cellspacing="0" border="0" style="margin-top:24px;">
+    <tr>
+      <td style="background-color:#E8F0D8;border:2px solid #323232;border-right:4px solid #323232;border-bottom:4px solid #323232;">
+        <a href="${href}" target="_blank" style="display:inline-block;padding:10px 22px;font-family:Arial,Helvetica,sans-serif;font-size:12px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;color:#323232;text-decoration:none;">${label} →</a>
+      </td>
+    </tr>
+  </table>`;
+}
+
+function quote(text: string) {
+  return `<table role="presentation" cellpadding="0" cellspacing="0" border="0" width="100%" style="margin:16px 0;">
+    <tr>
+      <td style="border-left:3px solid #323232;padding:10px 14px;background-color:#E8F0D8;">
+        <p style="margin:0;font-family:'Courier New',Courier,monospace;font-size:13px;line-height:1.6;color:#323232;">${text.replace(/\n/g, "<br/>")}</p>
+      </td>
+    </tr>
+  </table>`;
+}
+
+// ── Email senders ─────────────────────────────────────────────────────────────
+
+export async function sendCourseAccessEmail(to: string, name: string, courseTitle: string) {
+  const school = await getSchoolName();
+  await getResend().emails.send({
+    from: FROM,
+    to,
+    subject: `Вам открыт доступ к курсу «${courseTitle}»`,
+    html: base(`
+      <p ${p}>Привет, ${name}!</p>
+      <p ${p}>Вам открыт доступ к курсу <strong>«${courseTitle}»</strong>.</p>
+      <p ${pLast}>Перейдите на платформу чтобы начать обучение:</p>
+      ${btn(`${BASE_URL}/dashboard`, "Перейти к курсам")}
+    `, school),
+  }).catch((e) => console.error("[email] sendCourseAccessEmail:", e));
+}
+
+export async function sendHomeworkSubmittedEmail(
+  to: string,
+  curatorName: string,
+  studentName: string,
+  lessonTitle: string,
+  submissionId: string
+) {
+  const school = await getSchoolName();
+  await getResend().emails.send({
+    from: FROM,
+    to,
+    subject: `Новая работа на проверку — ${lessonTitle}`,
+    html: base(`
+      <p ${p}>Привет, ${curatorName}!</p>
+      <p ${p}>Студент <strong>${studentName}</strong> сдал работу по уроку <strong>«${lessonTitle}»</strong>.</p>
+      <p ${pLast}>Откройте работу чтобы проверить и оставить фидбек:</p>
+      ${btn(`${BASE_URL}/curator/homework/${submissionId}`, "Проверить работу")}
+    `, school),
+  }).catch((e) => console.error("[email] sendHomeworkSubmittedEmail:", e));
+}
+
+export async function sendFeedbackReceivedEmail(
+  to: string,
+  studentName: string,
+  lessonTitle: string,
+  feedbackText: string,
+  lessonUrl: string
+) {
+  const school = await getSchoolName();
+  await getResend().emails.send({
+    from: FROM,
+    to,
+    subject: `Получен фидбек по уроку «${lessonTitle}»`,
+    html: base(`
+      <p ${p}>Привет, ${studentName}!</p>
+      <p ${p}>Куратор проверил вашу работу по уроку <strong>«${lessonTitle}»</strong> и оставил обратную связь:</p>
+      ${quote(feedbackText)}
+      <p ${pLast}>Вернитесь к уроку чтобы увидеть полный фидбек:</p>
+      ${btn(lessonUrl, "Открыть урок")}
+    `, school),
+  }).catch((e) => console.error("[email] sendFeedbackReceivedEmail:", e));
+}
+
+export async function sendWelcomeEmail(to: string, name: string) {
+  const school = await getSchoolName();
+  await getResend().emails.send({
+    from: FROM,
+    to,
+    subject: `Добро пожаловать в ${school}`,
+    html: base(`
+      <p ${p}>Привет, ${name}!</p>
+      <p ${p}>Ваш аккаунт на образовательной платформе <strong>${school}</strong> подтверждён.</p>
+      <p ${pLast}>После того как администратор откроет вам доступ к курсу, вы получите письмо и сможете начать обучение.</p>
+      ${btn(`${BASE_URL}/dashboard`, "Перейти на платформу")}
+    `, school),
+  }).catch((e) => console.error("[email] sendWelcomeEmail:", e));
+}
+
+export async function sendTestEmail(to: string) {
+  const school = await getSchoolName();
+  await getResend().emails.send({
+    from: FROM,
+    to,
+    subject: `Тест — ${school} LMS`,
+    html: base(`
+      <p ${p}>Привет!</p>
+      <p ${p}>Это тестовое письмо от платформы <strong>${school} LMS</strong>.</p>
+      <p ${p}>Так будут выглядеть все уведомления — доступ к курсу, фидбек по ДЗ и другие.</p>
+      <p ${pLast}>Если письмо отображается корректно, значит email-уведомления настроены и работают.</p>
+      ${btn(`${BASE_URL}/dashboard`, "Открыть платформу")}
+    `, school),
+  }).catch((e) => console.error("[email] sendTestEmail:", e));
+}

src/lib/md-to-tiptap.ts

@@ -0,0 +1,188 @@
+import { unified } from "unified";
+import remarkParse from "remark-parse";
+
+// ── Types ─────────────────────────────────────────────────────────────────────
+
+type Mark = { type: string; attrs?: Record<string, unknown> };
+
+type TipTapNode = {
+  type: string;
+  attrs?: Record<string, unknown>;
+  content?: TipTapNode[];
+  text?: string;
+  marks?: Mark[];
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+type MdastNode = Record<string, any>;
+
+// ── Inline converter ──────────────────────────────────────────────────────────
+
+function convertInline(nodes: MdastNode[], marks: Mark[] = []): TipTapNode[] {
+  const result: TipTapNode[] = [];
+
+  for (const node of nodes) {
+    switch (node.type) {
+      case "text": {
+        if (!node.value) break;
+        const n: TipTapNode = { type: "text", text: node.value as string };
+        if (marks.length) n.marks = marks;
+        result.push(n);
+        break;
+      }
+
+      case "strong":
+        result.push(...convertInline(node.children, [...marks, { type: "bold" }]));
+        break;
+
+      case "emphasis":
+        result.push(...convertInline(node.children, [...marks, { type: "italic" }]));
+        break;
+
+      case "delete":
+        result.push(...convertInline(node.children, [...marks, { type: "strike" }]));
+        break;
+
+      case "inlineCode":
+        result.push({
+          type: "text",
+          text: node.value as string,
+          marks: [...marks, { type: "code" }],
+        });
+        break;
+
+      case "link": {
+        const linkMark: Mark = {
+          type: "link",
+          attrs: {
+            href: node.url ?? "#",
+            target: "_blank",
+            rel: "noopener noreferrer",
+            class: null,
+          },
+        };
+        result.push(...convertInline(node.children, [...marks, linkMark]));
+        break;
+      }
+
+      case "image":
+        // Only HTTP/HTTPS images — local Obsidian paths are not resolvable here
+        if (typeof node.url === "string" && /^https?:\/\//.test(node.url)) {
+          result.push({
+            type: "image",
+            attrs: {
+              src: node.url,
+              alt: node.alt ?? null,
+              title: node.title ?? null,
+            },
+          });
+        }
+        break;
+
+      case "break":
+        result.push({ type: "hardBreak" });
+        break;
+
+      default:
+        // Try to extract content from unknown inline nodes
+        if (Array.isArray(node.children)) {
+          result.push(...convertInline(node.children, marks));
+        } else if (node.value) {
+          const n: TipTapNode = { type: "text", text: node.value as string };
+          if (marks.length) n.marks = marks;
+          result.push(n);
+        }
+    }
+  }
+
+  return result;
+}
+
+// ── Block converter ───────────────────────────────────────────────────────────
+
+function convertBlock(nodes: MdastNode[]): TipTapNode[] {
+  const result: TipTapNode[] = [];
+
+  for (const node of nodes) {
+    switch (node.type) {
+      case "paragraph": {
+        const content = convertInline(node.children ?? []);
+        result.push(content.length ? { type: "paragraph", content } : { type: "paragraph" });
+        break;
+      }
+
+      case "heading": {
+        const content = convertInline(node.children ?? []);
+        result.push({
+          type: "heading",
+          attrs: { level: node.depth ?? 2 },
+          content,
+        });
+        break;
+      }
+
+      case "blockquote": {
+        const content = convertBlock(node.children ?? []);
+        result.push({ type: "blockquote", content });
+        break;
+      }
+
+      case "code": {
+        result.push({
+          type: "codeBlock",
+          attrs: { language: node.lang ?? null },
+          content: [{ type: "text", text: node.value as string }],
+        });
+        break;
+      }
+
+      case "list": {
+        const listType = node.ordered ? "orderedList" : "bulletList";
+        const items = (node.children as MdastNode[]).map((item) => ({
+          type: "listItem",
+          content: convertBlock(item.children ?? []),
+        }));
+        const listNode: TipTapNode = { type: listType, content: items };
+        if (node.ordered) listNode.attrs = { start: (node.start as number) ?? 1 };
+        result.push(listNode);
+        break;
+      }
+
+      case "thematicBreak":
+        result.push({ type: "horizontalRule" });
+        break;
+
+      // Skip html, definitions, footnotes, etc.
+    }
+  }
+
+  return result;
+}
+
+// ── Public API ────────────────────────────────────────────────────────────────
+
+/**
+ * Converts a Markdown string to a TipTap/ProseMirror JSON document.
+ * Handles: headings, paragraphs, bold, italic, strike, inline code,
+ * code blocks, blockquotes, lists (nested), links, images (HTTP only),
+ * horizontal rules, hard breaks.
+ *
+ * Obsidian-specific syntax (![[wikilink]], [[link]]) is silently ignored
+ * since local file paths are not available during server-side import.
+ */
+export function mdToTiptap(markdown: string): object {
+  // Strip Obsidian wikilinks: [[link]] → plain text, ![[image]] → removed
+  const cleaned = markdown
+    .replace(/!\[\[([^\]]+)\]\]/g, "") // remove ![[image]] embeds
+    .replace(/\[\[([^\]|]+)(?:\|([^\]]+))?\]\]/g, (_m, target, alias) => alias ?? target); // [[link|alias]] → alias or target
+
+  const tree = unified().use(remarkParse).parse(cleaned);
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const content = convertBlock((tree as any).children ?? []);
+
+  if (content.length === 0) {
+    content.push({ type: "paragraph" });
+  }
+
+  return { type: "doc", content };
+}

src/lib/settings.ts

@@ -0,0 +1,82 @@
+import { prisma } from "./prisma";
+
+// ── Defaults ──────────────────────────────────────────────────────────────────
+
+export const SETTINGS_DEFAULTS = {
+  // Basic
+  schoolName: "Second Brain",
+  schoolDescription: "Образовательная платформа Second Brain",
+  schoolKeywords: "",
+  maintenanceMode: "false",
+  registrationEnabled: "true",
+
+  // Notifications
+  notificationEmails: "", // newline-separated list
+  notifyOnHomework: "true",
+  notifyOnRegistration: "true",
+  notifyStudentOnFeedback: "true",
+
+  // Student profile
+  requireEmailVerification: "true",
+  lastNameField: "optional", // required | optional | hidden
+  phoneField: "hidden",       // required | optional | hidden
+
+  // Legal
+  privacyPolicyUrl: "",
+  termsUrl: "",
+  offerUrl: "",
+  showTermsCheckbox: "false",
+  orgRequisites: "",
+
+  // Curator permissions
+  curatorHomeworkScope: "all", // all | assigned
+  curatorCanAnswerQuestions: "true",
+  curatorCanSeeStudents: "true",
+
+  // Code injection
+  headCode: "",
+  bodyCode: "",
+} as const;
+
+export type SettingsKey = keyof typeof SETTINGS_DEFAULTS;
+export type Settings = Record<SettingsKey, string>;
+
+// ── Getters ───────────────────────────────────────────────────────────────────
+
+export async function getSettings(): Promise<Settings> {
+  try {
+    const rows = await prisma.settings.findMany();
+    const stored: Record<string, string> = {};
+    for (const row of rows) stored[row.key] = row.value;
+    return Object.fromEntries(
+      Object.entries(SETTINGS_DEFAULTS).map(([k, v]) => [k, stored[k] ?? v])
+    ) as Settings;
+  } catch {
+    // DB unavailable at build time — return defaults
+    return { ...SETTINGS_DEFAULTS } as Settings;
+  }
+}
+
+export async function getSetting(key: SettingsKey): Promise<string> {
+  try {
+    const row = await prisma.settings.findUnique({ where: { key } });
+    return row?.value ?? SETTINGS_DEFAULTS[key];
+  } catch {
+    return SETTINGS_DEFAULTS[key];
+  }
+}
+
+// ── Convenience helpers ───────────────────────────────────────────────────────
+
+/** Parse a boolean setting ("true" / "false") */
+export function asBool(value: string): boolean {
+  return value === "true";
+}
+
+/** Parse notification emails (newline-separated string → array) */
+export function parseNotificationEmails(value: string): string[] {
+  return value
+    .split("\n")
+    .map((e) => e.trim())
+    .filter(Boolean);
+}