Add clean-pdf tool page with web form and Zotero section

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.env.example

@@ -16,6 +16,11 @@ S3_REGION="eu-central"
 NEXT_PUBLIC_TURNSTILE_SITE_KEY=""
 TURNSTILE_SECRET_KEY=""
 
+# Яндекс.Метрика — ID счётчика school.second-brain.ru (цели signup_free/gate_view).
+# Build-time (NEXT_PUBLIC_*) — передавать через --build-arg при сборке. Сам счётчик
+# (ym init snippet) ставится в admin → Settings → headCode, отдельно от этого ID.
+NEXT_PUBLIC_METRIKA_COUNTER_ID=""
+
 # Kinescope API
 KINESCOPE_API_KEY=""
 
@@ -24,3 +29,23 @@ INTERNAL_GRANT_SECRET=""
 
 # Freemium: slug бесплатного курса, в который авто-записываем новых юзеров при регистрации
 FREE_COURSE_SLUG=obsidian-start
+
+# Freemium quiz funnel (Typebot → /api/internal/quiz-lead)
+QUIZ_LEAD_SECRET=""
+# Listmonk API base — публичный домен (Listmonk живёт на Hetzner, наружу через newsletter.)
+LISTMONK_URL="https://newsletter.second-brain.ru"
+LISTMONK_USER="apiuser"
+LISTMONK_TOKEN=""
+LISTMONK_QUIZ_LIST_ID=""
+
+# Freemium gate: ID wow-урока (2.6 «ежедневные заметки») — после его завершения
+# показываем лестницу-оффер (трипвайр + полный курс)
+WOW_MOMENT_LESSON_ID="obs-start-l2-006"
+
+# Obsidian Toolbox (/tools): "true" — показывать точки входа и роуты (staging);
+# не задано/иное — скрыто, /tools редиректит на /dashboard (prod, пока дорабатываем)
+TOOLBOX_VISIBLE=""
+
+# Чистый PDF (browserless на staging/prod; локально — SSH-туннель на staging)
+BROWSER_WS_URL="ws://localhost:3333"
+PDF_MONTHLY_LIMIT="100"

.gitignore

@@ -48,3 +48,9 @@ next-env.d.ts
 
 # Claude Code local plugins (external git repos, не коммитим)
 .claude/plugins/
+
+# agent-browser auth state
+lms-auth.json
+
+# SDD scratch
+.superpowers/

.superpowers/quiz-lead-task3-report.md

@@ -0,0 +1,62 @@
+# Quiz-Lead Task 3 — Implementation Report
+
+Date: 20260622
+
+## STATUS: DONE
+
+## Files created/modified
+
+| File | Action |
+|------|--------|
+| `src/app/api/internal/quiz-lead/route.ts` | CREATED |
+| `.env.example` | MODIFIED — added QUIZ_LEAD_SECRET, LISTMONK_URL, LISTMONK_USER, LISTMONK_TOKEN, LISTMONK_QUIZ_LIST_ID |
+| `src/middleware.ts` | NOT MODIFIED — `/api/internal` already in PUBLIC_ROUTES with startsWith match; covers /api/internal/quiz-lead without changes |
+
+## Test infra
+
+`grep -E 'vitest|jest' package.json` → no output (empty).
+No test framework present. Verification done via `npx tsc --noEmit` + manual reasoning.
+
+## Commands and output
+
+### `npm run type-check`
+```
+> lms-sb@0.1.0 type-check
+> tsc --noEmit
+
+(no output = clean)
+```
+Exit code: 0
+
+### `npm run lint` (new file only)
+```
+grep 'quiz-lead' in lint output → no results (no errors in new file)
+```
+
+Pre-existing lint errors in repo (36 total, 20 errors) are NOT related to this task:
+- `.claude/plugins/superpowers/` scripts using CommonJS require
+- `quick-enroll-modal.tsx` — react-hooks/immutability (pre-existing)
+- `kinescope-player.tsx` — react-hooks/set-state-in-effect (pre-existing)
+
+## Commit
+
+Base: `9fbb7ae`
+New:  `5e65ad6`
+
+```
+5e65ad6 Add quiz-lead internal endpoint for Typebot → Listmonk funnel
+```
+
+## Implementation notes
+
+- Auth: `x-quiz-secret` header vs `QUIZ_LEAD_SECRET` env var; 401 on mismatch/missing
+- Validation: email regex, archetype against const tuple, Number.isFinite(score); 400 on failure
+- Upsert logic: POST create → 409 → GET by email SQL query → PUT update; 502 on Listmonk errors
+- Middleware: `/api/internal` already in PUBLIC_ROUTES with `startsWith` — no changes needed
+- TypeScript strict mode: no `any` used; typed interfaces for Listmonk response shapes
+- No production Listmonk list created; LISTMONK_QUIZ_LIST_ID left as empty placeholder in .env.example
+- No git push; no deploy
+
+## Concerns
+
+None. The pre-existing lint errors in the repo are unrelated to this task and were already present before this commit.

Dockerfile

@@ -12,6 +12,8 @@ COPY . .
 # NEXT_PUBLIC_* vars are inlined at build time
 ARG NEXT_PUBLIC_TURNSTILE_SITE_KEY
 ENV NEXT_PUBLIC_TURNSTILE_SITE_KEY=$NEXT_PUBLIC_TURNSTILE_SITE_KEY
+ARG NEXT_PUBLIC_METRIKA_COUNTER_ID
+ENV NEXT_PUBLIC_METRIKA_COUNTER_ID=$NEXT_PUBLIC_METRIKA_COUNTER_ID
 # Generate Prisma client before build
 RUN npx prisma generate
 RUN npm run build

ROADMAP.md

@@ -340,3 +340,6 @@
   - Записи открытых встреч и вебинаров
   - Календарь: предстоящие открытые уроки, запуски курсов, события
   - Возможно: публичный Obsidian-like граф знаний
+
+- **Markdown-рендер описаний ДЗ** — сейчас `Homework.description` выводится как plain text (`whitespace-pre-wrap` в `src/components/student/homework-section.tsx`), поэтому markdown-разметка (списки, `**жирный**`, ссылки) показывается сырой. Перевести на markdown-рендер (react-markdown или общий рендерер контента урока), чтобы задания оформлялись аккуратно.
+  - Контекст: при миграции ДЗ из Emdesell были артефакты форматирования (оторванные маркеры списков `• \n`, пачки пустых строк). 17.06.2026 13 ДЗ (очаг — obsidian-ai) причёсаны regex'ом под текущий plain-text рендер (бэкап `Homework_bak_20260617`). Полноценное решение — markdown-рендер.

THIRD-PARTY-NOTICES.md

@@ -0,0 +1,51 @@
+# Third-Party Notices
+
+This product bundles third-party software. Their licenses and copyright
+notices are reproduced below as required.
+
+## force-graph
+
+Used client-side in the "Obsidian Wrapped" feature to render the vault graph
+poster on an off-screen canvas. The library and its node names never leave the
+browser.
+
+- Version: 1.51.4
+- License: MIT
+- Copyright (c) 2018 Vasco Asturiano
+- https://github.com/vasturiano/force-graph
+
+```
+MIT License
+
+Copyright (c) 2018 Vasco Asturiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+```
+
+force-graph depends on the d3-force family (ISC) by Mike Bostock for its
+force simulation, bundled transitively.
+
+## next/og (Satori + resvg)
+
+Server-side share-card PNG rendering (`ImageResponse`) uses Vercel's `next/og`,
+which bundles `satori` and `@resvg/resvg-wasm` (both MPL-2.0). These are part of
+the `next` dependency and distributed under Next.js's own license terms.
+
+- satori — MPL-2.0 — https://github.com/vercel/satori
+- resvg-wasm — MPL-2.0 — https://github.com/yisibl/resvg-js

docker-compose.yml

@@ -1,15 +1,25 @@
 services:
   db:
-    image: postgres:16-alpine
+    image: postgres:18-alpine
     restart: unless-stopped
     environment:
       POSTGRES_USER: lms_user
       POSTGRES_PASSWORD: lms_password
       POSTGRES_DB: lms_db
     ports:
-      - "5432:5432"
+      - "127.0.0.1:5432:5432"
     volumes:
-      - postgres_data:/var/lib/postgresql/data
+      - postgres_data:/var/lib/postgresql
+
+  browserless:
+    image: ghcr.io/browserless/chromium
+    restart: unless-stopped
+    ports:
+      - "127.0.0.1:3333:3000"
+    environment:
+      CONCURRENT: "2"
+      QUEUED: "10"
+      TIMEOUT: "120000"
 
 volumes:
   postgres_data:

docs/specs/20260706-clean-pdf-design.md

@@ -0,0 +1,111 @@
+# Чистый PDF — инструмент «URL → PDF» в LMS
+
+Дата: 20260706
+Статус: дизайн утверждается
+Референс: Clean PDF (`pdf.brainysnipe.ru`) из поста https://t.me/flowing_abyss/94, инструкция https://flowing-abyss.com/Clean-PDF-for-Zotero
+
+## Что делаем
+
+Инструмент для студентов школы: превращает любую веб-страницу в чистый PDF — без рекламы, меню и мусора, с нормальной типографикой, оглавлением, форматами A4/Letter и светлой/тёмной темой. Два сценария плюс открытый API:
+
+1. **Веб-форма** в кабинете (`/tools/clean-pdf`): вставил URL — скачал PDF.
+2. **Zotero**: персональный API-ключ + скрипт для плагина Actions & Tags — правый клик на записи → PDF генерируется и прикрепляется к ней.
+3. **Открытый API** для продвинутых: `curl` с Bearer-ключом, документация на странице инструмента.
+
+## Принятые решения
+
+| Вопрос | Решение |
+|---|---|
+| Архитектура | Всё внутри LMS (подход B): страница и API в Next.js, рендер — отдельный контейнер browserless в том же compose |
+| Кому доступ | Любой платный студент: есть `CourseEnrollment` на курс со slug ≠ `FREE_COURSE_SLUG`; admin/curator — без ограничений |
+| Видимость | Часть Obsidian Toolbox, живёт под существующим флагом `TOOLBOX_VISIBLE`; включение на проде — отдельное решение позже |
+| Лимит | 100 генераций/месяц на студента, env `PDF_MONTHLY_LIMIT` (без пересборки), плюс burst-лимит 5/мин |
+
+## Пайплайн генерации
+
+```
+URL студента
+  → Chromium (browserless) загружает страницу (JS отрабатывает)
+  → Next.js забирает итоговый HTML
+  → Defuddle (npm, через JSDOM) выделяет главный контент
+  → чистый HTML-шаблон: типографика, A4/Letter, light/dark, оглавление из заголовков
+  → Playwright page.pdf() в том же browserless
+  → файл application/pdf в ответ
+```
+
+- **Defuddle** — библиотека kepano (автор Obsidian), та же, что у референса: https://github.com/kepano/defuddle
+- **browserless/chromium** — отдельный контейнер в docker-compose: `MAX_CONCURRENT_SESSIONS=2`, встроенная очередь, `mem_limit` ~1 ГБ, порт наружу не публикуется.
+- Next.js подключается по WebSocket через `playwright-core` (только клиент, Chromium в образ LMS не попадает — образ не растёт).
+- Таймаут всего пайплайна ~90 сек; понятные JSON-ошибки: URL недоступен, лимит исчерпан, нет платного доступа.
+
+## Данные (Prisma)
+
+Новая модель:
+
+```prisma
+model PdfApiKey {
+  id        String    @id @default(cuid())
+  userId    String    @unique
+  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)
+  key       String    @unique   // формат sbpdf_<random>, показывается студенту
+  createdAt DateTime  @default(now())
+}
+```
+
+- Ключ создаётся лениво при первом заходе на страницу инструмента.
+- Перегенерация заменяет ключ (старый перестаёт работать сразу).
+- Учёт использований — существующая `ToolUsage` с `tool = "clean-pdf-generate"`; месячный счётчик = COUNT за календарный месяц. Именно отдельный идентификатор: `CopyButton` на странице логирует копирования как `tool = "clean-pdf"`, и они не должны тратить лимит генераций.
+- Проверка платного доступа выполняется на каждый запрос → рефанд или блокировка аккаунта автоматически отключает и веб, и ключ. Источник истины один — БД LMS.
+
+## API
+
+`GET /api/pdf?url=<...>&format=A4|Letter&theme=light|dark`
+
+- **Авторизация, два пути**: заголовок `Authorization: Bearer sbpdf_...` (Zotero, curl) **или** активная сессия Better Auth (веб-форма — студенту ключ для веба не нужен).
+- Роут добавляется в `PUBLIC_ROUTES` в `middleware.ts` (иначе 307 → /login — известные грабли).
+- Ответ: `application/pdf` + заголовки `X-Uses-Count` / `X-Max-Uses` (их же показывает Zotero-скрипт).
+- Ошибки: JSON `{ error }` c честными статусами (401 нет ключа/сессии, 403 нет платного доступа, 429 лимит, 422 плохой URL, 504 не отрендерилось).
+
+## Страница /tools/clean-pdf
+
+По образцу существующих инструментов тулбокса (реестр `TOOLS`, `ToolCard`, страница + клиентская форма):
+
+1. **Форма**: поле URL, выбор формата и темы, кнопка «Скачать PDF», счётчик «использовано N из 100 в этом месяце».
+2. **Блок «Zotero»**: персональный ключ (показать/скопировать/перегенерировать), пошаговая инструкция по Actions & Tags, готовый скрипт с уже подставленными адресом школы и ключом студента (адаптация скрипта референса: `SERVICE_URL = https://school.second-brain.ru`, endpoint `/api/pdf`).
+3. **Блок «API»**: пример curl.
+
+Дизайн — строго ДС-2 (перед вёрсткой перечитать `SBT/02-Стандарты/Дизайн-LMS/DESIGN.md`).
+
+## Безопасность
+
+Сервис скачивает произвольные URL изнутри прод-стенда — главный риск SSRF:
+
+- Только `http://` и `https://`.
+- Перед загрузкой — резолв DNS и блокировка приватных/зарезервированных диапазонов: localhost/127.x, 10.x, 172.16–31.x, 192.168.x, 169.254.x (метаданные облаков), ::1, fc00::/7, плюс docker-хостнеймы стенда (`db`, `app`, `browserless`).
+- Внутри browserless — перехват сетевых запросов страницы с той же фильтрацией (защита от редиректов и подгрузок на внутренние адреса).
+- Порт browserless наружу не публикуется, доступен только приложению по внутренней сети compose.
+- Куки/учётные данные пользователя на целевую страницу не передаются.
+- Санитайз имени файла в `Content-Disposition`.
+- Лимиты: 100/мес (env) + burst 5/мин на пользователя; сверху — очередь browserless (2 конкурентных рендера).
+
+## Деплой
+
+- `docker-compose.yml` (dev) и `docker-compose.prod.yml`: сервис `browserless` (образ `ghcr.io/browserless/chromium`), внутренняя сеть, лимиты памяти.
+- env: `BROWSER_WS_URL`, `PDF_MONTHLY_LIMIT=100`, существующий `TOOLBOX_VISIBLE`.
+- Prisma-миграция (`PdfApiKey`).
+- Стандартная схема деплоя LMS: сборка на Hetzner → `docker save | ssh | docker load` на Hoster.kz; browserless на Hoster.kz — обычный `docker pull`.
+- Hot-standby на Hetzner получает тот же compose (репликация БД уже покрывает `PdfApiKey` и `ToolUsage`).
+
+## Тестирование
+
+- Юнит: SSRF-валидатор (таблица адресов → допуск/блок), пайплайн Defuddle → HTML-шаблон на фикстурах.
+- Интеграция на staging: рендер 3–5 реальных статей (лонгрид, статья с картинками, JS-тяжёлая страница), проверка лимитов и обоих путей авторизации.
+- Zotero-скрипт — ручная проверка на живой библиотеке.
+- Веб-форма — e2e через agent-browser в `--headed` (headless режет антиспам — известные грабли).
+
+## Вне рамок (YAGNI)
+
+- Отдельный домен `pdf.second-brain.ru` — не нужен, всё на `school.second-brain.ru`.
+- Хранение сгенерированных PDF на сервере — файл отдаётся сразу и не сохраняется.
+- Пер-курсовый гейтинг, тарифные лимиты, платные квоты — не сейчас.
+- Освещение в рассылке/анонсы — после включения `TOOLBOX_VISIBLE` на проде, отдельной задачей.

next.config.ts

@@ -3,7 +3,7 @@ import type { NextConfig } from "next";
 const nextConfig: NextConfig = {
   output: "standalone",
   transpilePackages: ["unified", "remark-parse"],
-  serverExternalPackages: ["@prisma/client", "@prisma/adapter-pg", "pg"],
+  serverExternalPackages: ["@prisma/client", "@prisma/adapter-pg", "pg", "jsdom", "playwright-core", "defuddle"],
 };
 
 export default nextConfig;

package.json

@@ -7,7 +7,8 @@
     "build": "next build",
     "start": "next start",
     "lint": "eslint",
-    "type-check": "tsc --noEmit"
+    "type-check": "tsc --noEmit",
+    "test": "vitest run"
   },
   "prisma": {
     "seed": "ts-node --project tsconfig.json prisma/seed.ts"
@@ -33,13 +34,17 @@
     "better-auth": "^1.6.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "defuddle": "^0.19.1",
     "disposable-email-domains": "^1.0.62",
+    "force-graph": "^1.51.4",
     "gray-matter": "^4.0.3",
     "iconv-lite": "^0.7.2",
+    "jsdom": "^29.1.1",
     "lucide-react": "^1.7.0",
     "next": "16.2.2",
     "next-themes": "^0.4.6",
     "pg": "^8.20.0",
+    "playwright-core": "^1.61.1",
     "react": "19.2.4",
     "react-dom": "19.2.4",
     "remark-parse": "^11.0.0",
@@ -52,6 +57,7 @@
   "devDependencies": {
     "@tailwindcss/postcss": "^4",
     "@types/bcryptjs": "^2.4.6",
+    "@types/jsdom": "^28.0.3",
     "@types/node": "^20",
     "@types/pg": "^8.20.0",
     "@types/react": "^19",
@@ -62,6 +68,7 @@
     "prisma": "^7.6.0",
     "tailwindcss": "^4",
     "ts-node": "^10.9.2",
-    "typescript": "^5"
+    "typescript": "^5",
+    "vitest": "^4.1.9"
   }
 }

prisma/migrations/20260623060000_add_user_archetype_utm/migration.sql

@@ -0,0 +1,5 @@
+-- Тип второго мозга из freemium-квиза + UTM-метки для персонализации воронки
+ALTER TABLE "User" ADD COLUMN "archetype" TEXT;
+ALTER TABLE "User" ADD COLUMN "utmSource" TEXT;
+ALTER TABLE "User" ADD COLUMN "utmMedium" TEXT;
+ALTER TABLE "User" ADD COLUMN "utmCampaign" TEXT;

prisma/migrations/20260623070000_wrapped_run/migration.sql

@@ -0,0 +1,21 @@
+-- Obsidian Wrapped — агрегаты прогона (без имён/текстов заметок)
+CREATE TABLE "WrappedRun" (
+    "id" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "period" TEXT NOT NULL DEFAULT 'year',
+    "noteCount" INTEGER NOT NULL,
+    "linkCount" INTEGER NOT NULL,
+    "tagCount" INTEGER NOT NULL,
+    "topTag" TEXT,
+    "archetype" TEXT,
+    "score" INTEGER NOT NULL DEFAULT 0,
+    "shareToken" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    CONSTRAINT "WrappedRun_pkey" PRIMARY KEY ("id")
+);
+
+CREATE UNIQUE INDEX "WrappedRun_shareToken_key" ON "WrappedRun"("shareToken");
+CREATE INDEX "WrappedRun_userId_idx" ON "WrappedRun"("userId");
+
+ALTER TABLE "WrappedRun" ADD CONSTRAINT "WrappedRun_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/migrations/20260623120000_add_tool_usage/migration.sql

@@ -0,0 +1,14 @@
+-- Obsidian Toolbox — факт использования генератора участником (аналитика)
+CREATE TABLE "ToolUsage" (
+    "id" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "tool" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "ToolUsage_pkey" PRIMARY KEY ("id")
+);
+
+CREATE INDEX "ToolUsage_userId_idx" ON "ToolUsage"("userId");
+CREATE INDEX "ToolUsage_tool_idx" ON "ToolUsage"("tool");
+CREATE INDEX "ToolUsage_createdAt_idx" ON "ToolUsage"("createdAt");
+
+ALTER TABLE "ToolUsage" ADD CONSTRAINT "ToolUsage_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/migrations/20260706120000_add_pdf_api_key/migration.sql

@@ -0,0 +1,14 @@
+-- Чистый PDF — персональный API-ключ студента (Zotero/curl)
+CREATE TABLE "PdfApiKey" (
+    "id" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "key" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    CONSTRAINT "PdfApiKey_pkey" PRIMARY KEY ("id")
+);
+
+CREATE UNIQUE INDEX "PdfApiKey_userId_key" ON "PdfApiKey"("userId");
+CREATE UNIQUE INDEX "PdfApiKey_key_key" ON "PdfApiKey"("key");
+
+ALTER TABLE "PdfApiKey" ADD CONSTRAINT "PdfApiKey_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -25,6 +25,10 @@ model User {
   banExpires    DateTime?
   comment       String?
   mustChangePassword Boolean @default(false)
+  archetype     String?   // тип второго мозга из квиза: architect|gardener|librarian|pragmatist
+  utmSource     String?
+  utmMedium     String?
+  utmCampaign   String?
   createdAt     DateTime  @default(now())
   updatedAt     DateTime  @updatedAt
 
@@ -41,6 +45,52 @@ model User {
   questions            StudentQuestion[]
   closedQuestions      StudentQuestion[]       @relation("QuestionClosedBy")
   questionMessages     StudentQuestionMessage[]
+  wrappedRuns          WrappedRun[]
+  toolUsages           ToolUsage[]
+  pdfApiKey            PdfApiKey?
+}
+
+// Obsidian Wrapped — агрегаты прогона (БЕЗ имён/текстов заметок; обработка волта 100% client-side)
+model WrappedRun {
+  id         String   @id @default(cuid())
+  userId     String
+  period     String   @default("year") // year | quarter | all
+  noteCount  Int
+  linkCount  Int
+  tagCount   Int
+  topTag     String?
+  archetype  String?  // architect | gardener | librarian | pragmatist
+  score      Int      @default(0) // 0..100
+  shareToken String   @unique // публичная ссылка /share/wrapped/[token]
+  createdAt  DateTime @default(now())
+  updatedAt  DateTime @updatedAt
+
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@index([userId])
+}
+
+// Obsidian Toolbox — факт использования генератора участником (для аналитики)
+model ToolUsage {
+  id        String   @id @default(cuid())
+  userId    String
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  tool      String // callout | frontmatter | theme | style-settings
+  createdAt DateTime @default(now())
+
+  @@index([userId])
+  @@index([tool])
+  @@index([createdAt])
+}
+
+// Чистый PDF — персональный API-ключ студента (Zotero/curl)
+model PdfApiKey {
+  id        String   @id @default(cuid())
+  userId    String   @unique
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  key       String   @unique // sbpdf_<random>, показывается студенту на /tools/clean-pdf
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
 }
 
 model Session {

public/logo.svg

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 27.9.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Слой_3" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 283.5 283.5" style="enable-background:new 0 0 283.5 283.5;" xml:space="preserve" fill="#323232">
+<g>
+	<g>
+		<path d="M141.7,283.5C63.6,283.5,0,219.9,0,141.7C0,63.6,63.6,0,141.7,0s141.7,63.6,141.7,141.7S219.9,283.5,141.7,283.5z
+			 M141.7,2.7c-76.7,0-139,62.4-139,139c0,76.7,62.4,139,139,139s139-62.4,139-139C280.8,65.1,218.4,2.7,141.7,2.7z"/>
+	</g>
+	<g>
+		<path d="M239.1,154.4c2.9-6.2,3.9-12.6,3.1-19c-1.2-8.9-5.8-15.8-10-20.4c0.5-5.1-0.3-10.2-2.4-15.3c-2.8-6.7-7-11.8-12.5-15.2
+			c-1.6-13.1-9.3-23.2-21.1-27.5c-4.1-9-12.3-15.4-22.2-17.5c-16.1-3.4-27.3,5.5-33.6,14.4c-5.6-8.6-16.1-17.7-31.4-14.5
+			c-9.7,2-17.3,8.5-20.8,17.5c-14.6,4.4-20.4,16.7-21.1,27.8c-5.9,3-10.3,8-13.1,14.8c-2.2,5.3-2.9,10.6-2,15.8
+			c-3.9,3.9-9.4,11-10.7,20.4c-0.9,6.6,0.4,13.2,3.9,19.5c-7.4,10.1-7.3,23.6,0.5,33.9c2.8,3.7,6.2,6.6,10.2,8.7
+			c-0.9,13.3,3.7,29.1,19.9,32.7c4.3,1,8.5,1.2,12.7,0.6c5.3,9.2,15.2,15.1,26,15.1c11,0,20.6-6,25.8-14.8
+			c5.9,8.9,16,14.8,27.4,14.8c10.8,0,21-5.4,27.1-14.2c3.6,0.3,7.2,0,11-0.9c16.9-3.8,22.7-19.1,22.5-33.1c3.4-2.1,6.4-4.9,8.8-8.2
+			C245.1,179.2,245.7,165.3,239.1,154.4z M134.9,146.4c0,5.5-5.6-8.7-9.8-12.9c-1.4-1.4-2.8-1.8-4.5-1.9c-1.1-3-2.8-7.5-5.2-9.8
+			c-3.4-3.2-1.5-7.8-1.4-10.2c0.1-2.4-3.5,1.8-3,5c0.5,3.2,0.6,4.7-0.6,9.7c-0.7,2.6,1.2,4.8,3.2,6.4c-1.9,0.4-4,0.7-6.2,0.7
+			c-8.1,0-9.1,14.9-7.8,17.5c1.3,2.6,5.8,8.1,5.8-0.6c0-8.7,12-12,17.5-7.9c5.5,4.1,4.9,15,5.2,22.4c0.3,7.4,6.9,1.6,6.9,11.3
+			c0,9.7-2,12.3-4,16.5c-1.9,4.2-17.8,7.1-14.6,9.4c3.2,2.3,18.5-1,18.5-1v12.2v0.1c0,18.1-21.1,21.7-28.9,20.7
+			c-7.8-1-11.6-10-9.4-14.9c2.3-4.9,10-2.9,11.6-5.5c1.6-2.6-5.5-0.3-11-5.8c-5.5-5.5-14.6-5.8-10.3-2.3c4.2,3.6,2.6,10.7-1.9,13.6
+			c-4.5,2.9-18.8,1.6-20.1-9.4c-1.3-11,4.2-14.6,6.1-18.1c1.9-3.6-2.3-14.2-2.3-14.2s-2.3,11-5.8,11.3c-3.6,0.3-11.6-5.5-11.9-12.9
+			c-0.2-7.4,3.8-10.3,4.7-13.3c1-2.9-1.9-4.9-4.5-20.1c-2.6-15.3,18.4-19.3,20.4-17.4c1.9,1.9,12.6,6.5,10.3,3.2
+			c-2.3-3.2-2.9-11-4.2-18.1c-1.3-7.1-7.4-4.2-8.7-0.3c-1.3,3.9-6.8,18.1-8.1,4.5c-1.3-13.6,8.4-23,12-25.6c3.6-2.6,3.2-8.1,6.5-15
+			c3.2-7,11.6-9.5,16.8-8.6c5.2,1,13.3-1.6,13.3-1.6c-1.9-3.2-10-4.5-11.3-4.9c-1.3-0.3,3.6-11,17.5-11.3
+			c13.9-0.3,18.1,11.6,19.1,18.8c1,7.1-6.5,10.3-6.5,10.3c5.5,3.9,4.5,23.6,4.5,23.6c0.4,12.3-11,14.9-11,14.9s13,5.2,13,9.7V146.4z
+			 M196.7,100.9c3,0,5.5,2.5,5.5,5.5c0,3-2.5,5.5-5.5,5.5c-3,0-5.5-2.5-5.5-5.5C191.2,103.4,193.7,100.9,196.7,100.9z M169.2,75.6
+			c0,3-2.5,5.5-5.5,5.5c-3,0-5.5-2.5-5.5-5.5c0-3,2.5-5.5,5.5-5.5C166.8,70.1,169.2,72.6,169.2,75.6z M188.2,199.8
+			c-3,0-5.5-2.5-5.5-5.5c0-3,2.5-5.5,5.5-5.5c3,0,5.5,2.5,5.5,5.5C193.6,197.3,191.2,199.8,188.2,199.8z M230.4,184.7
+			c-2.3,3-5.1,5.5-8.4,7.1l-2.4,1.3l0.2,2.7c0.4,5.4,0.3,23.4-15.8,27c-3.7,0.8-7.2,1-10.7,0.5l-1.8-0.3v-17
+			c5.1-1.5,8.8-6.2,8.8-11.7c0-6.7-5.5-12.2-12.2-12.2s-12.2,5.5-12.2,12.2c0,5.6,3.7,10.3,8.8,11.7v24.8c-4.5,4.4-10.6,6.9-17,6.9
+			c-7.9,0-15-3.8-19.4-9.6l22.2-22.2v-26.8c5.1-1.5,8.8-6.2,8.8-11.7c0-6.7-5.5-12.2-12.2-12.2c-6.7,0-12.2,5.5-12.2,12.2
+			c0,5.6,3.7,10.3,8.8,11.7v24L144.9,222c-0.3-0.7-0.5-1.3-0.7-2c0.2-1.2,0.3-2.5,0.3-3.8v-69.4l15.3-15.3c4.6,2.6,10.6,1.9,14.5-2
+			c4.8-4.8,4.8-12.5,0-17.3c-4.8-4.8-12.5-4.8-17.3,0c-3.9,3.9-4.6,9.9-2,14.5l-10.5,10.5v-16.5v-0.3V63.3c2.7-5.5,8-12.4,15.9-15
+			l0,15.6c-5.1,1.5-8.8,6.2-8.8,11.7c0,6.7,5.5,12.2,12.2,12.2c6.7,0,12.2-5.5,12.2-12.2c0-5.6-3.7-10.3-8.8-11.7l0-16.7
+			c1.6,0,3.3,0.1,5.1,0.5c7.9,1.7,14.1,6.9,16.9,14.2l0.7,1.9l2,0.6c0.5,0.2,1,0.4,1.5,0.5l0,29.8c-5.1,1.5-8.8,6.2-8.8,11.7
+			c0,6.7,5.5,12.2,12.2,12.2c6.7,0,12.2-5.5,12.2-12.2c0-5.6-3.7-10.3-8.8-11.7l0-26.1c7.3,5.8,8.8,14.5,9,18.7l0.1,2.4l2.1,1.1
+			c4.7,2.4,8.3,6.5,10.6,12.1c1.8,4.3,2.3,8.6,1.6,12.8l-0.4,2.1l1.5,1.5c3.5,3.6,8,9.5,9.1,17.2c0,0.3,0.1,0.6,0.1,0.9h-28.6
+			c-1.5-5.1-6.2-8.8-11.7-8.8c-6.7,0-12.2,5.5-12.2,12.2c0,6.7,5.5,12.2,12.2,12.2c5.6,0,10.3-3.7,11.7-8.8h28.3
+			c-0.5,2.9-1.5,5.7-3.1,8.5l-1.3,2.3l1.6,2.2c2.2,3,3.6,6.4,4.1,9.8h-14.4c-1.5-5.1-6.2-8.8-11.7-8.8c-6.7,0-12.2,5.5-12.2,12.2
+			c0,6.7,5.5,12.2,12.2,12.2c5.6,0,10.3-3.7,11.7-8.8h14.4C234.5,177.5,233,181.3,230.4,184.7z M167.2,172.9c-3,0-5.5-2.5-5.5-5.5
+			c0-3,2.5-5.5,5.5-5.5c3,0,5.5,2.5,5.5,5.5C172.6,170.4,170.2,172.9,167.2,172.9z M161.8,117c2.1-2.1,5.6-2.1,7.7,0
+			c2.1,2.1,2.1,5.6,0,7.7c-2.1,2.1-5.6,2.1-7.7,0C159.7,122.6,159.7,119.1,161.8,117z M199.1,140.8c0,3-2.5,5.5-5.5,5.5
+			c-3,0-5.5-2.5-5.5-5.5c0-3,2.5-5.5,5.5-5.5C196.7,135.3,199.1,137.8,199.1,140.8z M214.4,170.4c0,3-2.5,5.5-5.5,5.5
+			c-3,0-5.5-2.5-5.5-5.5c0-3,2.5-5.5,5.5-5.5C211.9,164.9,214.4,167.4,214.4,170.4z"/>
+		<path d="M125.6,90.7c-0.8-4.9,0.5-16.5-3.9-15.5c-4.4,1-1.6,6.4-2.6,7.8c-2.4,3.2-0.5,3.7,2.7,7.1c3.2,3.4,3.1,10.5-1,12.8
+			c-4,2.3-3.8,7.6-1.8,6.8c2.1-0.8,5-3.7,6.4-7.4C127,98.5,126.4,95.6,125.6,90.7z"/>
+		<path d="M71.9,169.5c-1.8-2.9-3.3,3.7-6.7-0.2c-3.4-3.9-4.4-4.7-6-3.2c-3.9,3.5-1.9,8,1.5,10.9c3.4,2.9,2.9,0,2.7-3.1
+			c-0.2-3.1,1.8-1.8,5.2-0.6C72,174.3,73.8,172.4,71.9,169.5z"/>
+		<path d="M114.2,186.3c-3.4,2.6-5,6.1-1.5,6c3.6-0.2,3.2-5.3,6.1-4.7c2.9,0.6,1.7,5.7,4.7,3.6c3-2.1,5.4-11.1,2.8-14.2
+			c-2.6-3.1-4.8,3.2-5.7,3.4C116.7,181.2,117.6,183.7,114.2,186.3z"/>
+		<path d="M111,222.4c1.2,1.7,3.4,3.6,9.5,1.2c6.1-2.4,2.3-8.5-1.5-6.5C114.2,219.6,109.8,220.7,111,222.4z"/>
+		<path d="M116.6,98.2c-1.9-0.7-8.7-7.8-8.7-12.4c0-4.6-5.8,5.8-6.1,8.7c-0.2,2.9-5.3,5.8-9.6,7.3c-4.3,1.5-6.6,5.3-6.4,5.8
+			c0.2,0.5,3.4-0.2,6.4,0c3,0.2,2.6,6.5,2.4,13.8c-0.2,7.3-3.2,18.7-14.6,17.2c-11.4-1.5-11.4,7.8-13.3,15.8c-1.9,8,9,10.4,11.2,6.8
+			c2.2-3.6,6.5-7.3,11.2-4c0,0,3.4-5.7,0-7.6c-3.4-1.9-13.1,5.8-13.6,1c-0.5-4.9,4.6-3.4,14.1-8.2c9.5-4.8,9.2-19.2,10.5-22.6
+			c1.3-3.4-1.1-10.9,0-14.3c1.1-3.4,4.7-6.1,8.6-5.1C112.5,101.3,118.5,98.9,116.6,98.2z"/>
+		<path d="M122.4,59.4c-4.2-5.4-4.1,5.8-1.2,9C124.1,71.5,125.8,63.7,122.4,59.4z"/>
+		<path d="M86.3,95c3.2-3.2,1.3-3.4,6.7-4.6c5.4-1.2,4.4-4.9,7-7.8c2.6-2.9,8.6-9.2,3.5-10.2c-5.1-1-12.6-4.6-13.1,0
+			c-0.5,4.6,5.6,1.9,7.5,3.4c1.9,1.5-3.3,7.1-4.9,8.8c-1.6,1.6-6.7,3.3-6.7,3.3C82.4,91.9,83.1,98.2,86.3,95z"/>
+		<path d="M83.4,171.2c-0.5,4.9,8.8,9,8.8,9s0.3,0.2,0.7,0.6c-2.7,0.8-5.8,2.5-6.2,3.7c-0.6,1.9-9.1,10.2-12.5,12.2
+			c-3.4,2-2.7,7.7,1.1,12.2c3.9,4.5,7.6,5,8.4,3.6c0.8-1.5-5.6-4.2-6.7-8.9c-1.1-4.7,5.2-8.2,8.1-9.9c2.9-1.6,6.5-10.7,13.4-8
+			c2.4,1.9,4.1,9.5,4.1,9.5c2.2,3.2,2.7,1.2,1.9-4.1c-0.7-5.3,0-8.7,3.9-11.2c3.9-2.4,6.1-7,7-13.1c1-6.1,2.2-8.5,0-9.5
+			c-2.2-1.1-2.4,8.8-4.6,12.6c-2.1,3.8-6.8,5.4-14.1,6.1C89.4,176.8,83.8,166.3,83.4,171.2z"/>
+	</g>
+</g>
+</svg>

scripts/create_biz_brain_courses.sql

@@ -0,0 +1,133 @@
+-- ⚠️ СПРАВОЧНЫЙ ФАЙЛ — НЕ запускать `psql -f` на проде!
+-- CUID здесь синтетические (могут не пройти валидацию схемы Prisma).
+-- Создавать курсы biz-brain-base/premium + module-* ТОЛЬКО через LMS Admin UI.
+-- Этот SQL — справка по составу/связям курсов.
+
+-- ============================================================
+-- WS6: Создание курсов-носителей «Второй мозг для бизнеса»
+-- ============================================================
+-- ВАЖНО: Выполнять НА ПРОДЕ только после проверки на staging.
+--        Запускать через SSH: psql <db_url> -f create_biz_brain_courses.sql
+--        Идемпотентно: INSERT IGNORE по slug (уникальный ключ).
+--
+-- Курсы-носители (5 штук):
+--   biz-brain-base    — основной курс (ZIP хранилища + видео-онбординг)
+--   biz-brain-premium — премиум-раздел (консультации, инструкции по расширениям)
+--   module-caldav     — расширение CalDAV-календарь
+--   module-ai-pdf     — расширение AI-разбор PDF
+--   module-legacy     — расширение Legacy-миграция
+-- ============================================================
+
+BEGIN;
+
+-- Функция для генерации cuid-подобного ID (через gen_random_uuid как fallback)
+-- В реальности Prisma генерирует cuid автоматически — используем это свойство.
+-- Если у вас Postgres 14+: gen_random_uuid() дает UUID, но Prisma ожидает cuid.
+-- Безопаснее создать через Prisma API или LMS-Admin.
+
+-- Проверяем что slug ещё не существует перед вставкой
+DO $$
+BEGIN
+    -- biz-brain-base
+    IF NOT EXISTS (SELECT 1 FROM "Course" WHERE slug = 'biz-brain-base') THEN
+        INSERT INTO "Course" (id, slug, title, description, published, "allowAudio", "order", "createdAt", "updatedAt")
+        VALUES (
+            'clbizbrainbase0000001',
+            'biz-brain-base',
+            'Второй мозг для бизнеса — Базовый',
+            'Готовое хранилище Obsidian для собственника: CRM-воронка, финансовый кокпит, журнал решений, витрина команды. Разовый платёж, бессрочный доступ.',
+            false,  -- опубликовать вручную после наполнения контентом
+            false,
+            100,
+            NOW(),
+            NOW()
+        );
+        RAISE NOTICE 'Создан курс biz-brain-base';
+    ELSE
+        RAISE NOTICE 'Курс biz-brain-base уже существует — пропуск';
+    END IF;
+
+    -- biz-brain-premium
+    IF NOT EXISTS (SELECT 1 FROM "Course" WHERE slug = 'biz-brain-premium') THEN
+        INSERT INTO "Course" (id, slug, title, description, published, "allowAudio", "order", "createdAt", "updatedAt")
+        VALUES (
+            'clbizbrainprem0000002',
+            'biz-brain-premium',
+            'Второй мозг для бизнеса — Премиум (инструкции и консультации)',
+            'Раздел для премиум-покупателей: инструкции по установке расширений, запись на 2 персональные консультации, ответы на частые вопросы.',
+            false,
+            false,
+            101,
+            NOW(),
+            NOW()
+        );
+        RAISE NOTICE 'Создан курс biz-brain-premium';
+    ELSE
+        RAISE NOTICE 'Курс biz-brain-premium уже существует — пропуск';
+    END IF;
+
+    -- module-caldav
+    IF NOT EXISTS (SELECT 1 FROM "Course" WHERE slug = 'module-caldav') THEN
+        INSERT INTO "Course" (id, slug, title, description, published, "allowAudio", "order", "createdAt", "updatedAt")
+        VALUES (
+            'clmodulecaldav00000003',
+            'module-caldav',
+            'Расширение: CalDAV-календарь',
+            'Двусторонняя синхронизация задач и событий Obsidian с Google Calendar / Apple Calendar через CalDAV. Плагин Full Calendar Remastered v0.13.2.',
+            false,
+            false,
+            200,
+            NOW(),
+            NOW()
+        );
+        RAISE NOTICE 'Создан курс module-caldav';
+    ELSE
+        RAISE NOTICE 'Курс module-caldav уже существует — пропуск';
+    END IF;
+
+    -- module-ai-pdf
+    IF NOT EXISTS (SELECT 1 FROM "Course" WHERE slug = 'module-ai-pdf') THEN
+        INSERT INTO "Course" (id, slug, title, description, published, "allowAudio", "order", "createdAt", "updatedAt")
+        VALUES (
+            'clmoduleaipdf000000004',
+            'module-ai-pdf',
+            'Расширение: AI-разбор PDF и исследований',
+            'Промпты А1/А2/А3 для структурированного разбора PDF-документов, статей и исследований с помощью AI. Включает эталонный прогон и демо-PDF.',
+            false,
+            false,
+            201,
+            NOW(),
+            NOW()
+        );
+        RAISE NOTICE 'Создан курс module-ai-pdf';
+    ELSE
+        RAISE NOTICE 'Курс module-ai-pdf уже существует — пропуск';
+    END IF;
+
+    -- module-legacy
+    IF NOT EXISTS (SELECT 1 FROM "Course" WHERE slug = 'module-legacy') THEN
+        INSERT INTO "Course" (id, slug, title, description, published, "allowAudio", "order", "createdAt", "updatedAt")
+        VALUES (
+            'clmodulelegacy00000005',
+            'module-legacy',
+            'Расширение: Legacy-миграция из Evernote / Notion',
+            'Пошаговые инструкции и чеклист пост-обработки для переноса данных из Evernote и Notion в хранилище «Второй мозг для бизнеса».',
+            false,
+            false,
+            202,
+            NOW(),
+            NOW()
+        );
+        RAISE NOTICE 'Создан курс module-legacy';
+    ELSE
+        RAISE NOTICE 'Курс module-legacy уже существует — пропуск';
+    END IF;
+END
+$$;
+
+COMMIT;
+
+-- Проверка результата
+SELECT slug, title, published, "order" FROM "Course"
+WHERE slug IN ('biz-brain-base', 'biz-brain-premium', 'module-caldav', 'module-ai-pdf', 'module-legacy')
+ORDER BY "order";

scripts/verify_biz_brain_grant.sh

@@ -0,0 +1,108 @@
+#!/usr/bin/env bash
+# ============================================================
+# WS6: Проверка /api/internal/grant для biz-brain-* курсов
+# ============================================================
+# Использование:
+#   LMS_URL=https://school.second-brain.ru \
+#   LMS_SECRET=<secret_из_env> \
+#   TEST_EMAIL=laukhin@dementiy.com \
+#   bash verify_biz_brain_grant.sh
+#
+# Проверяет:
+#   1. Grant base-курса (biz-brain-base)
+#   2. Grant premium-бандла (все 5 курсов)
+#   3. Идемпотентность (повтор того же order_id)
+# ============================================================
+
+set -euo pipefail
+
+LMS_URL="${LMS_URL:-https://school.second-brain.ru}"
+LMS_SECRET="${LMS_SECRET:?Задай переменную LMS_SECRET}"
+TEST_EMAIL="${TEST_EMAIL:-laukhin@dementiy.com}"
+
+echo "=== WS6: Проверка grant-эндпоинта LMS ==="
+echo "  LMS: $LMS_URL"
+echo "  Email: $TEST_EMAIL"
+echo ""
+
+# ── Тест 1: Базовый бандл ────────────────────────────────────────────────────
+echo "[1] Grant biz-brain-base..."
+RESPONSE=$(curl -sf -X POST "$LMS_URL/api/internal/grant" \
+  -H "Content-Type: application/json" \
+  -H "x-internal-secret: $LMS_SECRET" \
+  -d '{
+    "email": "'"$TEST_EMAIL"'",
+    "name": "WS6 Test",
+    "course_slugs": ["biz-brain-base"],
+    "order_id": "ws6-test-base-001",
+    "payment_system": "robokassa"
+  }')
+
+echo "  Ответ: $RESPONSE"
+
+GRANTED=$(echo "$RESPONSE" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d.get('granted',''))")
+if [[ "$GRANTED" == *"biz-brain-base"* ]]; then
+    echo "  ✅ biz-brain-base выдан"
+else
+    IDEMPOTENT=$(echo "$RESPONSE" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d.get('idempotent',''))")
+    if [[ "$IDEMPOTENT" == "True" ]]; then
+        echo "  ℹ️  Идемпотентный ответ (уже выдан ранее)"
+    else
+        echo "  ❌ ОШИБКА: biz-brain-base не выдан. Ответ: $RESPONSE"
+        echo "  Убедись что курс biz-brain-base создан в LMS!"
+        exit 1
+    fi
+fi
+
+echo ""
+
+# ── Тест 2: Премиум-бандл ────────────────────────────────────────────────────
+echo "[2] Grant biz-brain-premium (5 курсов)..."
+RESPONSE=$(curl -sf -X POST "$LMS_URL/api/internal/grant" \
+  -H "Content-Type: application/json" \
+  -H "x-internal-secret: $LMS_SECRET" \
+  -d '{
+    "email": "'"$TEST_EMAIL"'",
+    "name": "WS6 Test",
+    "course_slugs": ["biz-brain-base", "biz-brain-premium", "module-caldav", "module-ai-pdf", "module-legacy"],
+    "order_id": "ws6-test-premium-001",
+    "payment_system": "robokassa"
+  }')
+
+echo "  Ответ: $RESPONSE"
+
+UNRESOLVED=$(echo "$RESPONSE" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d.get('unresolved',[]))")
+if [[ "$UNRESOLVED" == "[]" ]]; then
+    echo "  ✅ Все 5 курсов разрешены и выданы"
+else
+    echo "  ⚠️  Не разрешены: $UNRESOLVED"
+    echo "     Создай недостающие курсы в LMS (slug'и должны точно совпадать)"
+fi
+
+echo ""
+
+# ── Тест 3: Идемпотентность ──────────────────────────────────────────────────
+echo "[3] Повторный grant того же order_id (должен вернуть idempotent=true)..."
+RESPONSE=$(curl -sf -X POST "$LMS_URL/api/internal/grant" \
+  -H "Content-Type: application/json" \
+  -H "x-internal-secret: $LMS_SECRET" \
+  -d '{
+    "email": "'"$TEST_EMAIL"'",
+    "name": "WS6 Test",
+    "course_slugs": ["biz-brain-base"],
+    "order_id": "ws6-test-base-001",
+    "payment_system": "robokassa"
+  }')
+
+IDEMPOTENT=$(echo "$RESPONSE" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d.get('idempotent',''))" 2>/dev/null || echo "")
+if [[ "$IDEMPOTENT" == "True" ]]; then
+    echo "  ✅ Идемпотентность работает (повторный вызов вернул idempotent=true)"
+else
+    echo "  ⚠️  Ожидался idempotent=true, получено: $RESPONSE"
+fi
+
+echo ""
+echo "=== Проверка завершена ==="
+echo ""
+echo "Следующий шаг: опубликовать курсы в admin (published=true) после наполнения контентом."
+echo "  school.second-brain.ru/admin/courses"

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

@@ -2,13 +2,20 @@ import { redirect } from "next/navigation";
 import { getSettings } from "@/lib/settings";
 import { RegisterForm } from "./register-form";
 
-export default async function RegisterPage() {
+export default async function RegisterPage({
+  searchParams,
+}: {
+  searchParams: Promise<{ [key: string]: string | string[] | undefined }>;
+}) {
   const settings = await getSettings();
 
   if (settings.registrationEnabled !== "true") {
     redirect("/login?notice=registration_closed");
   }
 
+  const sp = await searchParams;
+  const str = (v: string | string[] | undefined) => (Array.isArray(v) ? v[0] : v) ?? "";
+
   return (
     <div className="min-h-screen flex items-center justify-center" style={{ backgroundColor: "var(--background)" }}>
       <div className="w-full max-w-sm">
@@ -26,6 +33,10 @@ export default async function RegisterPage() {
             privacyPolicyUrl={settings.privacyPolicyUrl}
             termsUrl={settings.termsUrl}
             offerUrl={settings.offerUrl}
+            archetype={str(sp.archetype)}
+            utmSource={str(sp.utm_source)}
+            utmMedium={str(sp.utm_medium)}
+            utmCampaign={str(sp.utm_campaign)}
           />
         </div>
       </div>

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

@@ -5,6 +5,7 @@ import Link from "next/link";
 
 declare global {
   interface Window {
+    ym?: (counterId: number, action: string, goal: string) => void;
     turnstile?: {
       render: (
         container: HTMLElement,
@@ -25,9 +26,13 @@ interface Props {
   privacyPolicyUrl: string;
   termsUrl: string;
   offerUrl: string;
+  archetype?: string;
+  utmSource?: string;
+  utmMedium?: string;
+  utmCampaign?: string;
 }
 
-export function RegisterForm({ showTermsCheckbox, privacyPolicyUrl, termsUrl, offerUrl }: Props) {
+export function RegisterForm({ showTermsCheckbox, privacyPolicyUrl, termsUrl, offerUrl, archetype, utmSource, utmMedium, utmCampaign }: Props) {
   const [name, setName] = useState("");
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
@@ -118,6 +123,10 @@ export function RegisterForm({ showTermsCheckbox, privacyPolicyUrl, termsUrl, of
           password,
           website: honeypot,
           cfTurnstileResponse: turnstileToken,
+          archetype,
+          utmSource,
+          utmMedium,
+          utmCampaign,
         }),
       });
     } catch {
@@ -153,6 +162,11 @@ export function RegisterForm({ showTermsCheckbox, privacyPolicyUrl, termsUrl, of
       return;
     }
 
+    // Яндекс.Метрика: цель «бесплатная регистрация»
+    const mc = Number(process.env.NEXT_PUBLIC_METRIKA_COUNTER_ID);
+    if (mc && typeof window !== "undefined" && typeof window.ym === "function") {
+      window.ym(mc, "reachGoal", "signup_free");
+    }
     setSuccess(true);
     setLoading(false);
   }

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

@@ -10,6 +10,7 @@ import { HomeworkSection } from "@/components/student/homework-section";
 import { QuizSection } from "@/components/student/quiz-section";
 import { LessonComments } from "@/components/student/lesson-comments";
 import { FileFormatBadge } from "@/components/shared/file-format-badge";
+import { TripwireGateBanner } from "@/components/student/tripwire-gate-banner";
 
 interface Props {
   params: Promise<{ slug: string; lessonId: string }>;
@@ -90,6 +91,8 @@ export default async function LessonPage({ params }: Props) {
   if (!lesson || lesson.module.course.slug !== slug) notFound();
 
   const isCompleted = !!progress;
+  const showTripwireGate =
+    !isAdmin && isCompleted && lessonId === process.env.WOW_MOMENT_LESSON_ID;
 
   // Build ordered flat list of all lessons for prev/next
   const allLessons = lesson.module.course.modules.flatMap((m) => m.lessons);
@@ -267,6 +270,8 @@ export default async function LessonPage({ params }: Props) {
         )}
       </div>
 
+      {showTripwireGate && <TripwireGateBanner />}
+
       {/* Comments */}
       {session && (
         <div

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

@@ -3,22 +3,20 @@ import { auth } from "@/lib/auth";
 import { redirect } from "next/navigation";
 import { prisma } from "@/lib/prisma";
 import Link from "next/link";
-
-// Продаваемая линейка курсов → лендинг продукта. Курсы из этого списка,
-// которых нет у студента, показываются на дашборде заблюренными карточками
-// со ссылкой на лендинг (апселл). Легаси/обычные версии сюда не входят.
-const STORE_LINKS: Record<string, string> = {
-  "second-brain-vault": "https://second-brain.ru/sb-vault",
-  "obsidian-full": "https://obsidian.second-brain.ru/",
-  "claude-obsidian": "https://second-brain.ru/claude-obsidian",
-  "zotero-full": "https://zotero.second-brain.ru/",
-  "obsidian-ai": "https://obsidianai.second-brain.ru/",
-};
+import { ArchetypeBanner } from "@/components/student/archetype-banner";
+import { ToolboxPromoCard } from "@/components/tools/ToolboxPromoCard";
+import { StoreShowcase } from "@/components/student/store-showcase";
+import { STORE_CATALOG } from "@/lib/store-catalog";
 
 export default async function StudentDashboard() {
   const session = await auth.api.getSession({ headers: await headers() });
   if (!session) redirect("/login");
 
+  const dbUser = await prisma.user.findUnique({
+    where: { id: session.user.id },
+    select: { archetype: true },
+  });
+
   const enrollments = await prisma.courseEnrollment.findMany({
     where: { userId: session.user.id },
     include: {
@@ -63,7 +61,7 @@ export default async function StudentDashboard() {
     "zotero-full": "zotero", // ВВ Zotero ← обычный Zotero
   };
   const storeCourses = await prisma.course.findMany({
-    where: { slug: { in: Object.keys(STORE_LINKS) }, published: true },
+    where: { slug: { in: Object.keys(STORE_CATALOG) }, published: true },
     select: { id: true, slug: true, title: true, description: true, coverImage: true },
   });
   const locked = storeCourses.filter(
@@ -79,6 +77,8 @@ export default async function StudentDashboard() {
         {active.length} активных курсов
       </p>
 
+      {dbUser?.archetype && <ArchetypeBanner archetype={dbUser.archetype} />}
+
       {active.length === 0 ? (
         <div className="card-aubade p-12 text-center">
           <p className="text-4xl mb-3">📚</p>
@@ -159,56 +159,17 @@ export default async function StudentDashboard() {
         </div>
       )}
 
+      {process.env.TOOLBOX_VISIBLE === "true" && (
+        <div className="mt-8">
+          <ToolboxPromoCard />
+        </div>
+      )}
+
       {locked.length > 0 && (
-        <div className="mt-10">
-          <p className="text-xs font-bold uppercase tracking-widest mb-3" style={{ color: "var(--muted-foreground)" }}>
-            Другие курсы Second Brain
-          </p>
-          <div className="grid gap-4 sm:grid-cols-2">
-            {locked.map((course) => (
-              <a
-                key={course.id}
-                href={STORE_LINKS[course.slug]}
-                target="_blank"
-                rel="noopener noreferrer"
-                className="card-aubade p-0 overflow-hidden flex flex-col relative group"
-              >
-                {/* Overlay: замок + призыв, поверх размытого контента */}
-                <div
-                  className="absolute inset-0 z-10 flex flex-col items-center justify-center gap-2 transition-opacity"
-                  style={{ backgroundColor: "color-mix(in srgb, var(--background) 55%, transparent)" }}
-                >
-                  <span className="text-2xl">🔒</span>
-                  <span
-                    className="text-sm font-bold px-4 py-2"
-                    style={{ border: "2px solid var(--foreground)", backgroundColor: "var(--accent)", color: "var(--foreground)" }}
-                  >
-                    Открыть курс →
-                  </span>
-                </div>
-                {/* Размытый контент карточки */}
-                <div className="flex flex-col flex-1" style={{ filter: "blur(1.8px)", opacity: 0.82, pointerEvents: "none" }}>
-                  {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-lg leading-tight">{course.title}</h2>
-                    {course.description && (
-                      <p className="text-sm line-clamp-3" style={{ color: "var(--muted-foreground)" }}>
-                        {course.description}
-                      </p>
-                    )}
-                  </div>
-                </div>
-              </a>
-            ))}
-          </div>
-        </div>
+        <StoreShowcase
+          courses={locked}
+          buyer={{ name: session.user.name, email: session.user.email }}
+        />
       )}
 
       {expired.length > 0 && (

src/app/(student)/layout.tsx

@@ -54,6 +54,14 @@ export default async function StudentLayout({ children }: { children: React.Reac
           {schoolName}
         </Link>
         <div className="flex items-center gap-4">
+          <Link href="/wrapped" className="text-sm hover:underline" style={{ color: "var(--muted-foreground)" }}>
+            Wrapped
+          </Link>
+          {process.env.TOOLBOX_VISIBLE === "true" && (
+            <Link href="/tools" className="text-sm hover:underline" style={{ color: "var(--muted-foreground)" }}>
+              Инструменты
+            </Link>
+          )}
           <Link href="/questions" className="text-sm hover:underline" style={{ color: "var(--muted-foreground)" }}>
             Вопросы
           </Link>

src/app/(student)/tools/bases/BasesForm.tsx

@@ -0,0 +1,93 @@
+"use client";
+import { useMemo, useState } from "react";
+import { buildBases, type BaseViewType, type BaseFilterScope } from "@/lib/tools/bases";
+import { CodeOutput } from "@/components/tools/CodeOutput";
+
+const VIEW_TYPES: BaseViewType[] = ["table", "cards", "list", "map"];
+const SCOPES: { id: BaseFilterScope; label: string }[] = [
+  { id: "none", label: "без фильтра" },
+  { id: "folder", label: "по папке" },
+  { id: "tag", label: "по тегу" },
+  { id: "property", label: "по свойству (выражение)" },
+];
+
+const field = "w-full p-2 text-sm";
+const fieldStyle = { border: "1px solid var(--border)", borderRadius: "2px", backgroundColor: "var(--background)", color: "var(--foreground)" } as const;
+
+const SCOPE_PLACEHOLDER: Record<BaseFilterScope, string> = {
+  none: "",
+  folder: "Projects",
+  tag: "#проект",
+  property: 'status == "done"',
+};
+
+export function BasesForm() {
+  const [viewType, setViewType] = useState<BaseViewType>("table");
+  const [viewName, setViewName] = useState("Мои заметки");
+  const [propsText, setPropsText] = useState("file.name, status");
+  const [filterScope, setFilterScope] = useState<BaseFilterScope>("folder");
+  const [filterValue, setFilterValue] = useState("Projects");
+  const [sortBy, setSortBy] = useState("file.name");
+  const [sortDir, setSortDir] = useState<"ASC" | "DESC">("ASC");
+  const [groupBy, setGroupBy] = useState("");
+  const [limit, setLimit] = useState("");
+
+  const yaml = useMemo(
+    () => buildBases({
+      viewType, viewName,
+      properties: propsText.split(",").map((s) => s.trim()).filter(Boolean),
+      filterScope, filterValue,
+      sortBy, sortDir, groupBy,
+      limit: limit ? Number(limit) : undefined,
+    }),
+    [viewType, viewName, propsText, filterScope, filterValue, sortBy, sortDir, groupBy, limit],
+  );
+
+  return (
+    <div className="grid gap-6 md:grid-cols-2">
+      <div className="flex flex-col gap-3">
+        <label className="text-sm">Тип представления
+          <select className={field} style={fieldStyle} value={viewType} onChange={(e) => setViewType(e.target.value as BaseViewType)}>
+            {VIEW_TYPES.map((t) => <option key={t} value={t}>{t}</option>)}
+          </select>
+        </label>
+        <label className="text-sm">Имя представления
+          <input className={field} style={fieldStyle} value={viewName} onChange={(e) => setViewName(e.target.value)} />
+        </label>
+        <label className="text-sm">Свойства / колонки (через запятую)
+          <input className={field} style={fieldStyle} placeholder="file.name, status, …" value={propsText} onChange={(e) => setPropsText(e.target.value)} />
+        </label>
+
+        <div className="flex items-end gap-2">
+          <label className="text-sm flex-1">Фильтр
+            <select className={field} style={fieldStyle} value={filterScope} onChange={(e) => setFilterScope(e.target.value as BaseFilterScope)}>
+              {SCOPES.map((s) => <option key={s.id} value={s.id}>{s.label}</option>)}
+            </select>
+          </label>
+          {filterScope !== "none" && (
+            <input className={field} style={fieldStyle} placeholder={SCOPE_PLACEHOLDER[filterScope]} value={filterValue} onChange={(e) => setFilterValue(e.target.value)} />
+          )}
+        </div>
+
+        <div className="flex items-end gap-2">
+          <label className="text-sm flex-1">Сортировка (свойство)
+            <input className={field} style={fieldStyle} placeholder="не сортировать" value={sortBy} onChange={(e) => setSortBy(e.target.value)} />
+          </label>
+          <select className={field} style={{ ...fieldStyle, width: "auto" }} value={sortDir} onChange={(e) => setSortDir(e.target.value as "ASC" | "DESC")}>
+            <option value="ASC">ASC</option>
+            <option value="DESC">DESC</option>
+          </select>
+        </div>
+        <label className="text-sm">Группировка (свойство)
+          <input className={field} style={fieldStyle} placeholder="без группировки" value={groupBy} onChange={(e) => setGroupBy(e.target.value)} />
+        </label>
+        <label className="text-sm">Лимит
+          <input type="number" min={0} className={field} style={fieldStyle} placeholder="без лимита" value={limit} onChange={(e) => setLimit(e.target.value)} />
+        </label>
+      </div>
+      <div className="flex flex-col gap-4">
+        <CodeOutput code={yaml} tool="bases" label="Содержимое .base-файла" />
+      </div>
+    </div>
+  );
+}

src/app/(student)/tools/bases/page.tsx

@@ -0,0 +1,15 @@
+import { BasesForm } from "./BasesForm";
+
+export const metadata = { title: "Генератор Bases — Obsidian Toolbox" };
+
+export default function BasesToolPage() {
+  return (
+    <main className="mx-auto w-full max-w-5xl px-6 py-8">
+      <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Генератор Bases</h1>
+      <p className="mt-1 text-sm" style={{ color: "var(--muted-foreground)" }}>Базы Obsidian: представление-таблица с фильтрами и сортировкой (.base-файл).</p>
+      <div className="mt-6 card-aubade p-4">
+        <BasesForm />
+      </div>
+    </main>
+  );
+}

src/app/(student)/tools/callout/CalloutForm.tsx

@@ -0,0 +1,50 @@
+"use client";
+import { useMemo, useState } from "react";
+import { buildCalloutCss } from "@/lib/tools/callout";
+import { CodeOutput } from "@/components/tools/CodeOutput";
+
+export function CalloutForm() {
+  const [id, setId] = useState("idea");
+  const [title, setTitle] = useState("Идея");
+  const [color, setColor] = useState("#7C3AED");
+  const [icon, setIcon] = useState("lightbulb");
+
+  const result = useMemo(() => {
+    try { return buildCalloutCss({ id, title, color, icon }); }
+    catch { return null; }
+  }, [id, title, color, icon]);
+
+  const field = "w-full p-2 text-sm";
+  const fieldStyle = { border: "1px solid var(--border)", borderRadius: "2px", backgroundColor: "var(--background)", color: "var(--foreground)" } as const;
+
+  return (
+    <div className="grid gap-6 md:grid-cols-2">
+      <div className="flex flex-col gap-3">
+        <label className="text-sm">Тип (id)
+          <input className={field} style={fieldStyle} value={id} onChange={(e) => setId(e.target.value)} />
+        </label>
+        <label className="text-sm">Заголовок
+          <input className={field} style={fieldStyle} value={title} onChange={(e) => setTitle(e.target.value)} />
+        </label>
+        <label className="text-sm">Цвет (HEX)
+          <input className={field} style={fieldStyle} value={color} onChange={(e) => setColor(e.target.value)} />
+        </label>
+        <label className="text-sm">Иконка (lucide-id)
+          <input className={field} style={fieldStyle} value={icon} onChange={(e) => setIcon(e.target.value)} />
+        </label>
+      </div>
+      <div className="flex flex-col gap-4">
+        {result ? (
+          <>
+            <CodeOutput code={result.css} tool="callout" label="CSS-snippet" />
+            <CodeOutput code={result.markdown} tool="callout" label="Пример разметки" />
+          </>
+        ) : (
+          <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>
+            Проверь поля: id — латиница и цифры (напр. <code>idea</code>), цвет — корректный HEX (напр. <code>#7C3AED</code>).
+          </p>
+        )}
+      </div>
+    </div>
+  );
+}

src/app/(student)/tools/callout/page.tsx

@@ -0,0 +1,15 @@
+import { CalloutForm } from "./CalloutForm";
+
+export const metadata = { title: "Генератор callout-CSS — Obsidian Toolbox" };
+
+export default function CalloutToolPage() {
+  return (
+    <main className="mx-auto w-full max-w-5xl px-6 py-8">
+      <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Генератор callout-CSS</h1>
+      <p className="mt-1 text-sm" style={{ color: "var(--muted-foreground)" }}>Кастомные коллауты Obsidian: тип, заголовок, цвет, иконка.</p>
+      <div className="mt-6 card-aubade p-4">
+        <CalloutForm />
+      </div>
+    </main>
+  );
+}

src/app/(student)/tools/clean-pdf/CleanPdfForm.tsx

@@ -0,0 +1,76 @@
+"use client";
+import { useState } from "react";
+
+const field = "w-full p-2 text-sm";
+const fieldStyle = { border: "1px solid var(--border)", borderRadius: "2px", backgroundColor: "var(--background)", color: "var(--foreground)" } as const;
+
+export function CleanPdfForm({ initialUsed, limit }: { initialUsed: number; limit: number }) {
+  const [url, setUrl] = useState("");
+  const [format, setFormat] = useState<"A4" | "Letter">("A4");
+  const [theme, setTheme] = useState<"light" | "dark">("light");
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const [used, setUsed] = useState(initialUsed);
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!url.trim() || busy) return;
+    setBusy(true);
+    setError(null);
+    try {
+      const params = new URLSearchParams({ url: url.trim(), format, theme });
+      const res = await fetch(`/api/pdf?${params}`);
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({ error: `Ошибка ${res.status}` }));
+        setError(body.error ?? `Ошибка ${res.status}`);
+        return;
+      }
+      const usesCount = res.headers.get("X-Uses-Count");
+      if (usesCount) setUsed(Number(usesCount));
+
+      const blob = await res.blob();
+      const disposition = res.headers.get("Content-Disposition") ?? "";
+      const match = disposition.match(/filename\*=UTF-8''([^;]+)/);
+      const filename = match ? decodeURIComponent(match[1]) : "document.pdf";
+      const a = document.createElement("a");
+      a.href = URL.createObjectURL(blob);
+      a.download = filename;
+      a.click();
+      URL.revokeObjectURL(a.href);
+    } catch {
+      setError("Сеть недоступна, попробуйте ещё раз");
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  return (
+    <form onSubmit={handleSubmit} className="flex flex-col gap-3">
+      <label className="text-sm">Адрес статьи
+        <input className={field} style={fieldStyle} type="url" required placeholder="https://…"
+               value={url} onChange={(e) => setUrl(e.target.value)} />
+      </label>
+      <div className="grid grid-cols-2 gap-3">
+        <label className="text-sm">Формат
+          <select className={field} style={fieldStyle} value={format} onChange={(e) => setFormat(e.target.value as "A4" | "Letter")}>
+            <option value="A4">A4</option>
+            <option value="Letter">Letter</option>
+          </select>
+        </label>
+        <label className="text-sm">Тема
+          <select className={field} style={fieldStyle} value={theme} onChange={(e) => setTheme(e.target.value as "light" | "dark")}>
+            <option value="light">Светлая</option>
+            <option value="dark">Тёмная</option>
+          </select>
+        </label>
+      </div>
+      <div className="flex items-center gap-4">
+        <button type="submit" disabled={busy} className="btn-aubade px-4 py-2 text-sm font-bold disabled:opacity-50">
+          {busy ? "Генерируем… (до минуты)" : "Скачать PDF"}
+        </button>
+        <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>Использовано {used} из {limit} в этом месяце</span>
+      </div>
+      {error && <p className="text-sm" style={{ color: "var(--destructive)" }}>{error}</p>}
+    </form>
+  );
+}

src/app/(student)/tools/clean-pdf/ZoteroSection.tsx

@@ -0,0 +1,58 @@
+"use client";
+import { useState, useTransition } from "react";
+import { CodeOutput } from "@/components/tools/CodeOutput";
+import { regeneratePdfApiKey } from "@/lib/actions/pdf-key-actions";
+
+export function ZoteroSection({ apiKey, script, baseUrl }: { apiKey: string; script: string; baseUrl: string }) {
+  const [key, setKey] = useState(apiKey);
+  const [revealed, setRevealed] = useState(false);
+  const [pending, startTransition] = useTransition();
+
+  const shownKey = revealed ? key : key.slice(0, 8) + "…" + key.slice(-4);
+  const curlExample = `curl -H "Authorization: Bearer ${key}" \\\n  "${baseUrl}/api/pdf?url=https://example.com/article&format=A4&theme=light" \\\n  -o article.pdf`;
+
+  function regenerate() {
+    if (!confirm("Старый ключ перестанет работать (в том числе в Zotero). Продолжить?")) return;
+    startTransition(async () => {
+      const res = await regeneratePdfApiKey();
+      if (res.ok && res.key) { setKey(res.key); setRevealed(true); }
+    });
+  }
+
+  return (
+    <div className="flex flex-col gap-4">
+      <h2 className="text-lg font-bold" style={{ color: "var(--foreground)" }}>Zotero и API</h2>
+
+      <div className="flex flex-col gap-2">
+        <div className="text-xs font-bold tracking-wide" style={{ color: "var(--muted-foreground)" }}>ВАШ КЛЮЧ</div>
+        <div className="flex items-center gap-2">
+          <code className="p-2 text-sm" style={{ border: "1px solid var(--border)", borderRadius: "2px" }}>{shownKey}</code>
+          <button type="button" className="text-xs underline" onClick={() => setRevealed((v) => !v)}>
+            {revealed ? "скрыть" : "показать"}
+          </button>
+          <button type="button" className="text-xs underline" onClick={() => navigator.clipboard.writeText(key)}>скопировать</button>
+          <button type="button" className="text-xs underline" disabled={pending} onClick={regenerate}>
+            {pending ? "меняем…" : "перевыпустить"}
+          </button>
+        </div>
+        <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+          Ключ персональный — не публикуйте его. Если ключ утёк, перевыпустите: старый сразу отключится.
+        </p>
+      </div>
+
+      <div className="flex flex-col gap-2 text-sm" style={{ color: "var(--foreground)" }}>
+        <div className="text-xs font-bold tracking-wide" style={{ color: "var(--muted-foreground)" }}>НАСТРОЙКА ZOTERO</div>
+        <ol className="list-decimal pl-5 flex flex-col gap-1">
+          <li>Установите плагин <a className="underline" href="https://github.com/windingwind/zotero-actions-tags/releases" target="_blank" rel="noreferrer">Actions &amp; Tags</a>.</li>
+          <li>В настройках плагина нажмите «+» и создайте действие: Name — <b>Чистый PDF</b>, Operation — <b>Script</b>.</li>
+          <li>В поле Data вставьте скрипт ниже (ключ уже подставлен).</li>
+          <li>Menu Label — <b>_чистый PDF</b>, поставьте галочку <b>In item Menu</b>, нажмите Save.</li>
+          <li>Готово: правый клик на записи с URL → «_чистый PDF» — файл прикрепится к записи.</li>
+        </ol>
+      </div>
+
+      <CodeOutput code={script} tool="clean-pdf" label="СКРИПТ ДЛЯ ACTIONS & TAGS" />
+      <CodeOutput code={curlExample} tool="clean-pdf" label="ПРИМЕР ДЛЯ API (CURL)" />
+    </div>
+  );
+}

src/app/(student)/tools/clean-pdf/page.tsx

@@ -0,0 +1,50 @@
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { getMonthlyLimit, getMonthlyUsage, hasPaidAccess } from "@/lib/clean-pdf/access";
+import { getOrCreatePdfKey } from "@/lib/clean-pdf/keys";
+import { buildZoteroScript } from "@/lib/clean-pdf/zotero-script";
+import { CleanPdfForm } from "./CleanPdfForm";
+import { ZoteroSection } from "./ZoteroSection";
+
+export const metadata = { title: "Чистый PDF — Obsidian Toolbox" };
+
+export default async function CleanPdfToolPage() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  const userId = session?.user.id;
+  const paid = userId ? await hasPaidAccess(userId) : false;
+
+  if (!userId || !paid) {
+    return (
+      <main className="mx-auto w-full max-w-5xl px-6 py-8">
+        <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Чистый PDF</h1>
+        <div className="mt-6 card-aubade p-4">
+          <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>
+            Инструмент доступен студентам платных курсов школы. Если у вас есть купленный курс — проверьте, что вы вошли в нужный аккаунт.
+          </p>
+        </div>
+      </main>
+    );
+  }
+
+  const [key, used] = await Promise.all([getOrCreatePdfKey(userId), getMonthlyUsage(userId)]);
+  const limit = getMonthlyLimit();
+  const baseUrl = process.env.NEXT_PUBLIC_APP_URL ?? "https://school.second-brain.ru";
+  const zoteroScript = buildZoteroScript({ apiKey: key, baseUrl });
+
+  return (
+    <main className="mx-auto w-full max-w-5xl px-6 py-8">
+      <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Чистый PDF</h1>
+      <p className="mt-1 text-sm" style={{ color: "var(--muted-foreground)" }}>
+        Превращает любую веб-страницу в аккуратный PDF: без рекламы, меню и мусора — только текст, картинки и оглавление.
+      </p>
+
+      <div className="mt-6 card-aubade p-4">
+        <CleanPdfForm initialUsed={used} limit={limit} />
+      </div>
+
+      <div className="mt-6 card-aubade p-4">
+        <ZoteroSection apiKey={key} script={zoteroScript} baseUrl={baseUrl} />
+      </div>
+    </main>
+  );
+}

src/app/(student)/tools/dataview/DataviewForm.tsx

@@ -0,0 +1,103 @@
+"use client";
+import { useMemo, useState } from "react";
+import { Plus, Trash2 } from "lucide-react";
+import { buildDataview, type DataviewColumn, type DataviewQueryType } from "@/lib/tools/dataview";
+import { CodeOutput } from "@/components/tools/CodeOutput";
+
+const QUERY_TYPES: DataviewQueryType[] = ["TABLE", "LIST", "TASK", "CALENDAR"];
+
+const field = "w-full p-2 text-sm";
+const fieldStyle = { border: "1px solid var(--border)", borderRadius: "2px", backgroundColor: "var(--background)", color: "var(--foreground)" } as const;
+
+export function DataviewForm() {
+  const [queryType, setQueryType] = useState<DataviewQueryType>("TABLE");
+  const [withoutId, setWithoutId] = useState(false);
+  const [columns, setColumns] = useState<DataviewColumn[]>([
+    { expr: "file.name", alias: "Заметка" },
+    { expr: "file.mtime", alias: "Изменено" },
+  ]);
+  const [from, setFrom] = useState("#project");
+  const [where, setWhere] = useState("");
+  const [sortField, setSortField] = useState("file.mtime");
+  const [sortDir, setSortDir] = useState<"ASC" | "DESC">("DESC");
+  const [limit, setLimit] = useState("");
+
+  const query = useMemo(
+    () => buildDataview({
+      queryType, withoutId, columns,
+      from, where, sortField, sortDir,
+      limit: limit ? Number(limit) : undefined,
+    }),
+    [queryType, withoutId, columns, from, where, sortField, sortDir, limit],
+  );
+
+  const showColumns = queryType !== "TASK";
+  const colLabel = queryType === "CALENDAR" ? "поле даты" : queryType === "LIST" ? "поле (берётся первое)" : "колонки";
+
+  function updateCol(i: number, patch: Partial<DataviewColumn>) {
+    setColumns((prev) => prev.map((c, idx) => (idx === i ? { ...c, ...patch } : c)));
+  }
+
+  return (
+    <div className="grid gap-6 md:grid-cols-2">
+      <div className="flex flex-col gap-3">
+        <label className="text-sm">Тип запроса
+          <select className={field} style={fieldStyle} value={queryType} onChange={(e) => setQueryType(e.target.value as DataviewQueryType)}>
+            {QUERY_TYPES.map((t) => <option key={t} value={t}>{t}</option>)}
+          </select>
+        </label>
+
+        {(queryType === "TABLE" || queryType === "LIST") && (
+          <label className="text-sm flex items-center gap-2">
+            <input type="checkbox" checked={withoutId} onChange={(e) => setWithoutId(e.target.checked)} />
+            WITHOUT ID (скрыть колонку-ссылку)
+          </label>
+        )}
+
+        {showColumns && (
+          <div className="flex flex-col gap-2">
+            <span className="text-sm">{colLabel}</span>
+            {columns.map((c, i) => (
+              <div key={i} className="flex items-center gap-2">
+                <input className={field} style={fieldStyle} placeholder="выражение (file.name)" value={c.expr} onChange={(e) => updateCol(i, { expr: e.target.value })} />
+                {queryType === "TABLE" && (
+                  <input className={field} style={fieldStyle} placeholder="алиас" value={c.alias ?? ""} onChange={(e) => updateCol(i, { alias: e.target.value })} />
+                )}
+                <button type="button" onClick={() => setColumns((p) => p.filter((_, idx) => idx !== i))} aria-label="Удалить" className="btn-aubade inline-flex items-center justify-center p-2">
+                  <Trash2 size={16} />
+                </button>
+              </div>
+            ))}
+            {queryType === "TABLE" && (
+              <button type="button" onClick={() => setColumns((p) => [...p, { expr: "" }])} className="btn-aubade inline-flex items-center justify-center gap-2 text-sm">
+                <Plus size={16} /> Колонка
+              </button>
+            )}
+          </div>
+        )}
+
+        <label className="text-sm">FROM (источник)
+          <input className={field} style={fieldStyle} placeholder='#tag или "Папка" или [[Заметка]]' value={from} onChange={(e) => setFrom(e.target.value)} />
+        </label>
+        <label className="text-sm">WHERE (условие)
+          <input className={field} style={fieldStyle} placeholder="!completed" value={where} onChange={(e) => setWhere(e.target.value)} />
+        </label>
+        <div className="flex items-end gap-2">
+          <label className="text-sm flex-1">SORT (поле)
+            <input className={field} style={fieldStyle} value={sortField} onChange={(e) => setSortField(e.target.value)} />
+          </label>
+          <select className={field} style={{ ...fieldStyle, width: "auto" }} value={sortDir} onChange={(e) => setSortDir(e.target.value as "ASC" | "DESC")}>
+            <option value="DESC">DESC</option>
+            <option value="ASC">ASC</option>
+          </select>
+        </div>
+        <label className="text-sm">LIMIT
+          <input type="number" min={0} className={field} style={fieldStyle} placeholder="без лимита" value={limit} onChange={(e) => setLimit(e.target.value)} />
+        </label>
+      </div>
+      <div className="flex flex-col gap-4">
+        <CodeOutput code={query} tool="dataview" label="Запрос Dataview (вставь в заметку)" />
+      </div>
+    </div>
+  );
+}

src/app/(student)/tools/dataview/page.tsx

@@ -0,0 +1,15 @@
+import { DataviewForm } from "./DataviewForm";
+
+export const metadata = { title: "Генератор Dataview — Obsidian Toolbox" };
+
+export default function DataviewToolPage() {
+  return (
+    <main className="mx-auto w-full max-w-5xl px-6 py-8">
+      <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Генератор Dataview</h1>
+      <p className="mt-1 text-sm" style={{ color: "var(--muted-foreground)" }}>Запросы DQL: таблицы, списки, задачи и календарь по заметкам.</p>
+      <div className="mt-6 card-aubade p-4">
+        <DataviewForm />
+      </div>
+    </main>
+  );
+}

src/app/(student)/tools/frontmatter/FrontmatterForm.tsx

@@ -0,0 +1,87 @@
+"use client";
+import { useMemo, useState } from "react";
+import { Plus, Trash2 } from "lucide-react";
+import { buildFrontmatter, type PropField, type PropType } from "@/lib/tools/frontmatter";
+import { CodeOutput } from "@/components/tools/CodeOutput";
+
+const TYPES: PropType[] = ["text", "number", "checkbox", "date", "list", "tags"];
+const TYPE_RU: Record<PropType, string> = {
+  text: "текст", number: "число", checkbox: "флажок", date: "дата", list: "список", tags: "теги",
+};
+
+const field = "w-full p-2 text-sm";
+const fieldStyle = { border: "1px solid var(--border)", borderRadius: "2px", backgroundColor: "var(--background)", color: "var(--foreground)" } as const;
+
+export function FrontmatterForm() {
+  const [fields, setFields] = useState<PropField[]>([
+    { key: "title", type: "text", value: "Моя заметка" },
+    { key: "tags", type: "tags", value: "obsidian, pkm" },
+    { key: "created", type: "date", value: "2026-06-23" },
+  ]);
+
+  const yaml = useMemo(() => buildFrontmatter(fields), [fields]);
+
+  function update(i: number, patch: Partial<PropField>) {
+    setFields((prev) => prev.map((f, idx) => (idx === i ? { ...f, ...patch } : f)));
+  }
+  function addRow() {
+    setFields((prev) => [...prev, { key: "", type: "text", value: "" }]);
+  }
+  function removeRow(i: number) {
+    setFields((prev) => prev.filter((_, idx) => idx !== i));
+  }
+
+  return (
+    <div className="grid gap-6 md:grid-cols-2">
+      <div className="flex flex-col gap-3">
+        {fields.map((f, i) => (
+          <div key={i} className="flex flex-col gap-2 p-2" style={{ border: "1px solid var(--border)", borderRadius: "2px" }}>
+            <div className="flex items-center gap-2">
+              <input
+                className={field} style={fieldStyle} placeholder="имя свойства"
+                value={f.key} onChange={(e) => update(i, { key: e.target.value })}
+              />
+              <button
+                type="button" onClick={() => removeRow(i)} aria-label="Удалить свойство"
+                className="btn-aubade inline-flex items-center justify-center p-2"
+              >
+                <Trash2 size={16} />
+              </button>
+            </div>
+            <div className="flex items-center gap-2">
+              <select
+                className={field} style={fieldStyle}
+                value={f.type} onChange={(e) => update(i, { type: e.target.value as PropType })}
+              >
+                {TYPES.map((t) => <option key={t} value={t}>{TYPE_RU[t]}</option>)}
+              </select>
+              {f.type === "checkbox" ? (
+                <select className={field} style={fieldStyle} value={f.value ?? "false"} onChange={(e) => update(i, { value: e.target.value })}>
+                  <option value="true">true</option>
+                  <option value="false">false</option>
+                </select>
+              ) : f.type === "date" ? (
+                <input
+                  type="date" className={field} style={fieldStyle}
+                  value={f.value ?? ""} onChange={(e) => update(i, { value: e.target.value })}
+                />
+              ) : (
+                <input
+                  className={field} style={fieldStyle}
+                  placeholder={f.type === "list" || f.type === "tags" ? "через запятую" : "значение"}
+                  value={f.value ?? ""} onChange={(e) => update(i, { value: e.target.value })}
+                />
+              )}
+            </div>
+          </div>
+        ))}
+        <button type="button" onClick={addRow} className="btn-aubade inline-flex items-center justify-center gap-2 text-sm">
+          <Plus size={16} /> Добавить свойство
+        </button>
+      </div>
+      <div className="flex flex-col gap-4">
+        <CodeOutput code={yaml} tool="frontmatter" label="YAML-frontmatter" />
+      </div>
+    </div>
+  );
+}

src/app/(student)/tools/frontmatter/page.tsx

@@ -0,0 +1,15 @@
+import { FrontmatterForm } from "./FrontmatterForm";
+
+export const metadata = { title: "Генератор YAML-frontmatter — Obsidian Toolbox" };
+
+export default function FrontmatterToolPage() {
+  return (
+    <main className="mx-auto w-full max-w-5xl px-6 py-8">
+      <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Генератор YAML-frontmatter</h1>
+      <p className="mt-1 text-sm" style={{ color: "var(--muted-foreground)" }}>Шаблон свойств заметки: имя, тип, значение по умолчанию.</p>
+      <div className="mt-6 card-aubade p-4">
+        <FrontmatterForm />
+      </div>
+    </main>
+  );
+}

src/app/(student)/tools/layout.tsx

@@ -0,0 +1,8 @@
+import { redirect } from "next/navigation";
+
+// Toolbox ещё в доработке: на проде скрыт (флаг не задан) — прямой заход на
+// /tools/* уводит на дашборд. На staging выставлен TOOLBOX_VISIBLE=true.
+export default function ToolsLayout({ children }: { children: React.ReactNode }) {
+  if (process.env.TOOLBOX_VISIBLE !== "true") redirect("/dashboard");
+  return <>{children}</>;
+}

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

@@ -0,0 +1,16 @@
+import { TOOLS } from "@/lib/tools/_shared/types";
+import { ToolCard } from "@/components/tools/ToolCard";
+
+export const metadata = { title: "Инструменты — Obsidian Toolbox" };
+
+export default function ToolsIndexPage() {
+  return (
+    <main className="mx-auto w-full max-w-5xl px-6 py-8">
+      <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Инструменты</h1>
+      <p className="mt-1 text-sm" style={{ color: "var(--muted-foreground)" }}>Генераторы синтаксиса Obsidian для участников школы.</p>
+      <div className="mt-6 grid grid-cols-1 gap-4 sm:grid-cols-2">
+        {TOOLS.map((t) => <ToolCard key={t.id} tool={t} />)}
+      </div>
+    </main>
+  );
+}

src/app/(student)/tools/style-settings/StyleSettingsForm.tsx

@@ -0,0 +1,78 @@
+"use client";
+import { useMemo, useState } from "react";
+import { Plus, Trash2 } from "lucide-react";
+import { buildStyleSettings, type SettingItem, type SettingType } from "@/lib/tools/style-settings";
+import { CodeOutput } from "@/components/tools/CodeOutput";
+
+const TYPES: SettingType[] = [
+  "heading", "class-toggle", "class-select",
+  "variable-text", "variable-number", "variable-number-slider",
+  "variable-select", "variable-color", "info-text",
+];
+
+const field = "w-full p-2 text-sm";
+const fieldStyle = { border: "1px solid var(--border)", borderRadius: "2px", backgroundColor: "var(--background)", color: "var(--foreground)" } as const;
+
+function hasDefault(t: SettingType) { return t !== "heading" && t !== "info-text"; }
+function hasOptions(t: SettingType) { return t === "variable-select" || t === "class-select"; }
+
+export function StyleSettingsForm() {
+  const [pluginName, setPluginName] = useState("Моя тема");
+  const [settings, setSettings] = useState<SettingItem[]>([
+    { id: "section", title: "Цвета", type: "heading" },
+    { id: "accent", title: "Акцент", type: "variable-color", default: "#7C3AED", format: "hex" },
+  ]);
+
+  const output = useMemo(() => buildStyleSettings({ pluginName, settings }), [pluginName, settings]);
+
+  function update(i: number, patch: Partial<SettingItem>) {
+    setSettings((prev) => prev.map((s, idx) => (idx === i ? { ...s, ...patch } : s)));
+  }
+  function addRow() {
+    setSettings((prev) => [...prev, { id: "", title: "", type: "variable-text", default: "" }]);
+  }
+  function removeRow(i: number) {
+    setSettings((prev) => prev.filter((_, idx) => idx !== i));
+  }
+
+  return (
+    <div className="grid gap-6 md:grid-cols-2">
+      <div className="flex flex-col gap-3">
+        <label className="text-sm">Имя темы / плагина
+          <input className={field} style={fieldStyle} value={pluginName} onChange={(e) => setPluginName(e.target.value)} />
+        </label>
+        {settings.map((s, i) => (
+          <div key={i} className="flex flex-col gap-2 p-2" style={{ border: "1px solid var(--border)", borderRadius: "2px" }}>
+            <div className="flex items-center gap-2">
+              <input className={field} style={fieldStyle} placeholder="id" value={s.id} onChange={(e) => update(i, { id: e.target.value })} />
+              <button type="button" onClick={() => removeRow(i)} aria-label="Удалить настройку" className="btn-aubade inline-flex items-center justify-center p-2">
+                <Trash2 size={16} />
+              </button>
+            </div>
+            <input className={field} style={fieldStyle} placeholder="заголовок" value={s.title} onChange={(e) => update(i, { title: e.target.value })} />
+            <select className={field} style={fieldStyle} value={s.type} onChange={(e) => update(i, { type: e.target.value as SettingType })}>
+              {TYPES.map((t) => <option key={t} value={t}>{t}</option>)}
+            </select>
+            {hasDefault(s.type) && (
+              <input className={field} style={fieldStyle} placeholder="значение по умолчанию" value={s.default ?? ""} onChange={(e) => update(i, { default: e.target.value })} />
+            )}
+            {hasOptions(s.type) && (
+              <input className={field} style={fieldStyle} placeholder="варианты через запятую" value={s.options ?? ""} onChange={(e) => update(i, { options: e.target.value })} />
+            )}
+            {s.type === "variable-color" && (
+              <select className={field} style={fieldStyle} value={s.format ?? "hex"} onChange={(e) => update(i, { format: e.target.value })}>
+                {["hex", "rgb", "hsl"].map((fmt) => <option key={fmt} value={fmt}>{fmt}</option>)}
+              </select>
+            )}
+          </div>
+        ))}
+        <button type="button" onClick={addRow} className="btn-aubade inline-flex items-center justify-center gap-2 text-sm">
+          <Plus size={16} /> Добавить настройку
+        </button>
+      </div>
+      <div className="flex flex-col gap-4">
+        <CodeOutput code={output} tool="style-settings" label="Блок Style Settings (в начало CSS-сниппета)" />
+      </div>
+    </div>
+  );
+}

src/app/(student)/tools/style-settings/page.tsx

@@ -0,0 +1,15 @@
+import { StyleSettingsForm } from "./StyleSettingsForm";
+
+export const metadata = { title: "Генератор Style Settings — Obsidian Toolbox" };
+
+export default function StyleSettingsToolPage() {
+  return (
+    <main className="mx-auto w-full max-w-5xl px-6 py-8">
+      <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Генератор Style Settings</h1>
+      <p className="mt-1 text-sm" style={{ color: "var(--muted-foreground)" }}>Комментарии-настройки для плагина Style Settings.</p>
+      <div className="mt-6 card-aubade p-4">
+        <StyleSettingsForm />
+      </div>
+    </main>
+  );
+}

src/app/(student)/tools/theme/ThemeForm.tsx

@@ -0,0 +1,58 @@
+"use client";
+import { useMemo, useState } from "react";
+import { buildThemeCss, type ThemeInput } from "@/lib/tools/theme";
+import { CodeOutput } from "@/components/tools/CodeOutput";
+
+const FIELDS: { key: keyof ThemeInput; label: string }[] = [
+  { key: "background", label: "Фон" },
+  { key: "text", label: "Текст" },
+  { key: "accent", label: "Акцент" },
+  { key: "link", label: "Ссылки" },
+  { key: "border", label: "Рамка" },
+];
+
+const fieldStyle = { border: "1px solid var(--border)", borderRadius: "2px", backgroundColor: "var(--background)", color: "var(--foreground)" } as const;
+
+export function ThemeForm() {
+  const [theme, setTheme] = useState<ThemeInput>({
+    background: "#0F0F0F", text: "#EAEAEA", accent: "#7C3AED", link: "#4EA1FF", border: "#333333",
+  });
+
+  const css = useMemo(() => buildThemeCss(theme), [theme]);
+
+  function update(key: keyof ThemeInput, value: string) {
+    setTheme((prev) => ({ ...prev, [key]: value }));
+  }
+
+  return (
+    <div className="grid gap-6 md:grid-cols-2">
+      <div className="flex flex-col gap-3">
+        {FIELDS.map((f) => (
+          <label key={f.key} className="flex items-center justify-between gap-3 text-sm">
+            <span>{f.label}</span>
+            <span className="flex items-center gap-2">
+              <input
+                type="color" value={theme[f.key]} onChange={(e) => update(f.key, e.target.value)}
+                aria-label={f.label} style={{ width: 36, height: 28, border: "1px solid var(--border)", borderRadius: 2, padding: 0, background: "none" }}
+              />
+              <input
+                className="w-28 p-2 text-sm" style={fieldStyle}
+                value={theme[f.key]} onChange={(e) => update(f.key, e.target.value)}
+              />
+            </span>
+          </label>
+        ))}
+        <div
+          className="mt-2 p-4 text-sm"
+          style={{ backgroundColor: theme.background, color: theme.text, border: `2px solid ${theme.border}`, borderRadius: 2 }}
+        >
+          Превью темы. <a href="#" onClick={(e) => e.preventDefault()} style={{ color: theme.link }}>ссылка</a>,{" "}
+          <span style={{ color: theme.accent, fontWeight: 700 }}>акцент</span>.
+        </div>
+      </div>
+      <div className="flex flex-col gap-4">
+        <CodeOutput code={css} tool="theme" label="CSS-переменные темы" />
+      </div>
+    </div>
+  );
+}

src/app/(student)/tools/theme/page.tsx

@@ -0,0 +1,15 @@
+import { ThemeForm } from "./ThemeForm";
+
+export const metadata = { title: "Генератор темы — Obsidian Toolbox" };
+
+export default function ThemeToolPage() {
+  return (
+    <main className="mx-auto w-full max-w-5xl px-6 py-8">
+      <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>Генератор темы / CSS-переменных</h1>
+      <p className="mt-1 text-sm" style={{ color: "var(--muted-foreground)" }}>Палитра → набор CSS-переменных темы Obsidian.</p>
+      <div className="mt-6 card-aubade p-4">
+        <ThemeForm />
+      </div>
+    </main>
+  );
+}

src/app/(student)/wrapped/WrappedClient.tsx

@@ -0,0 +1,354 @@
+"use client";
+
+import { useState, useRef, useCallback } from "react";
+import type { Stats, RawNote, Period, RunPayload } from "./_client/types";
+import { supportsFSA, readViaFSA, readViaInput, readViaDrop } from "./_client/reader";
+
+type Screen = "intro" | "loading" | "result" | "error";
+type View = "card" | "graph";
+
+const ARCHETYPE_RU: Record<string, string> = {
+  architect: "🏛 Архитектор",
+  gardener: "🌱 Садовник",
+  librarian: "📚 Библиотекарь",
+  pragmatist: "⚡ Прагматик",
+};
+const PERIOD_RU: Record<Period, string> = { year: "год", quarter: "квартал", all: "всё время" };
+
+export function WrappedClient({ userName }: { userName: string }) {
+  const [screen, setScreen] = useState<Screen>("intro");
+  const [stats, setStats] = useState<Stats | null>(null);
+  const [period, setPeriod] = useState<Period>("year");
+  const [error, setError] = useState("");
+  const [shareUrl, setShareUrl] = useState("");
+  const [sharing, setSharing] = useState(false);
+  const [view, setView] = useState<View>("card");
+  const [graphUrl, setGraphUrl] = useState("");
+  const [graphLabels, setGraphLabels] = useState(false);
+  const [graphBusy, setGraphBusy] = useState(false);
+  const inputRef = useRef<HTMLInputElement>(null);
+  const notesRef = useRef<RawNote[]>([]);
+
+  // Сбросить отрисованный граф (при новых данных / смене периода).
+  const resetGraph = useCallback(() => {
+    setView("card");
+    setGraphUrl((prev) => {
+      if (prev) URL.revokeObjectURL(prev);
+      return "";
+    });
+  }, []);
+
+  // Отрисовать граф-постер в офф-скрин Canvas → blob URL. force-graph грузим лениво.
+  const renderGraph = useCallback(
+    async (labels: boolean) => {
+      if (!stats || !stats.graph.nodes.length) return;
+      setGraphBusy(true);
+      setError("");
+      try {
+        const { renderGraphPoster } = await import("./_client/graphPoster");
+        const blob = await renderGraphPoster(stats.graph, labels);
+        setGraphUrl((prev) => {
+          if (prev) URL.revokeObjectURL(prev);
+          return URL.createObjectURL(blob);
+        });
+      } catch {
+        setError("Не удалось построить граф");
+      }
+      setGraphBusy(false);
+    },
+    [stats],
+  );
+
+  const runWorker = useCallback((notes: RawNote[], p: Period) => {
+    setScreen("loading");
+    const worker = new Worker(new URL("./_client/parse.worker.ts", import.meta.url), { type: "module" });
+    worker.onmessage = (e: MessageEvent<Stats>) => {
+      setStats(e.data);
+      resetGraph();
+      setScreen("result");
+      worker.terminate();
+    };
+    worker.onerror = () => {
+      setError("Не удалось обработать хранилище");
+      setScreen("error");
+      worker.terminate();
+    };
+    worker.postMessage({ notes, period: p });
+  }, [resetGraph]);
+
+  const handleNotes = useCallback(
+    (notes: RawNote[]) => {
+      if (!notes.length) {
+        setError("В выбранной папке не нашлось .md заметок");
+        setScreen("error");
+        return;
+      }
+      notesRef.current = notes;
+      runWorker(notes, period);
+    },
+    [period, runWorker],
+  );
+
+  async function pickFSA() {
+    try {
+      handleNotes(await readViaFSA());
+    } catch (e) {
+      if ((e as Error).name !== "AbortError") {
+        setError("Не удалось прочитать папку");
+        setScreen("error");
+      }
+    }
+  }
+
+  async function onInput(e: React.ChangeEvent<HTMLInputElement>) {
+    if (e.target.files) handleNotes(await readViaInput(e.target.files));
+  }
+
+  async function onDrop(e: React.DragEvent) {
+    e.preventDefault();
+    if (e.dataTransfer.items) handleNotes(await readViaDrop(e.dataTransfer.items));
+  }
+
+  function changePeriod(p: Period) {
+    setPeriod(p);
+    if (notesRef.current.length) runWorker(notesRef.current, p);
+  }
+
+  async function share() {
+    if (!stats || sharing) return;
+    setSharing(true);
+    setError("");
+    const payload: RunPayload = {
+      period: stats.period,
+      noteCount: stats.noteCount,
+      linkCount: stats.linkCount,
+      tagCount: stats.tagCount,
+      topTag: stats.topTags[0]?.tag ?? null,
+      archetype: stats.archetype,
+      score: stats.score,
+    };
+    try {
+      const res = await fetch("/api/wrapped/run", {
+        method: "POST",
+        headers: { "content-type": "application/json" },
+        body: JSON.stringify(payload),
+      });
+      const data = (await res.json()) as { shareToken?: string };
+      if (data.shareToken) setShareUrl(`${location.origin}/share/wrapped/${data.shareToken}`);
+      else setError("Не удалось создать ссылку");
+    } catch {
+      setError("Не удалось создать ссылку");
+    }
+    setSharing(false);
+  }
+
+  return (
+    <main className="max-w-2xl mx-auto px-6 py-12 w-full">
+      <p className="text-xs font-bold uppercase tracking-widest mb-2" style={{ color: "var(--muted-foreground)" }}>
+        Obsidian Wrapped · 2026
+      </p>
+
+      {screen === "intro" && (
+        <div className="card-aubade p-8">
+          <h1 className="text-2xl font-bold mb-3">Твой год в заметках, {userName.split(" ")[0]}</h1>
+          <p className="text-sm mb-6" style={{ color: "var(--muted-foreground)" }}>
+            Выбери папку своего хранилища — всё считается прямо в браузере, заметки никуда не загружаются.
+            На выходе — карточка «твой год в заметках», которой можно поделиться.
+          </p>
+          <div
+            onDrop={onDrop}
+            onDragOver={(e) => e.preventDefault()}
+            className="p-8 text-center mb-4"
+            style={{ border: "2px dashed var(--border)", borderRadius: 2 }}
+          >
+            <p className="text-3xl mb-2">📂</p>
+            {supportsFSA() ? (
+              <button onClick={pickFSA} className="btn-aubade btn-aubade-accent text-sm">
+                Выбрать папку хранилища
+              </button>
+            ) : (
+              <button onClick={() => inputRef.current?.click()} className="btn-aubade btn-aubade-accent text-sm">
+                Выбрать папку хранилища
+              </button>
+            )}
+            <p className="text-xs mt-3" style={{ color: "var(--muted-foreground)" }}>
+              или перетащи папку сюда
+            </p>
+            <input
+              ref={inputRef}
+              type="file"
+              // @ts-expect-error webkitdirectory не в типах
+              webkitdirectory=""
+              directory=""
+              multiple
+              hidden
+              onChange={onInput}
+            />
+          </div>
+          <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+            🔒 Приватность: тексты заметок остаются в браузере. На сервер уходят только числа (сколько заметок, связей, тегов).
+          </p>
+        </div>
+      )}
+
+      {screen === "loading" && (
+        <div className="card-aubade p-12 text-center">
+          <p className="text-3xl mb-3">⏳</p>
+          <p className="font-medium">Считаю твой год…</p>
+        </div>
+      )}
+
+      {screen === "error" && (
+        <div className="card-aubade p-8 text-center">
+          <p className="text-sm mb-4" style={{ color: "oklch(0.577 0.245 27.325)" }}>{error}</p>
+          <button onClick={() => { setScreen("intro"); setError(""); }} className="btn-aubade text-sm">
+            Попробовать снова
+          </button>
+        </div>
+      )}
+
+      {screen === "result" && stats && (
+        <div className="space-y-4">
+          {/* переключатель периода */}
+          <div className="flex flex-wrap items-center gap-2">
+            {(["year", "quarter", "all"] as Period[]).map((p) => (
+              <button
+                key={p}
+                onClick={() => changePeriod(p)}
+                className="text-xs px-3 py-1.5"
+                style={{
+                  border: "2px solid var(--foreground)",
+                  borderRadius: 2,
+                  background: period === p ? "var(--accent)" : "var(--background)",
+                  fontWeight: period === p ? 700 : 400,
+                }}
+              >
+                {PERIOD_RU[p]}
+              </button>
+            ))}
+            {/* переключатель вида: карточка / граф */}
+            <div className="flex gap-2 ml-auto">
+              {(["card", "graph"] as View[]).map((v) => (
+                <button
+                  key={v}
+                  onClick={() => {
+                    setView(v);
+                    if (v === "graph" && !graphUrl && !graphBusy) renderGraph(graphLabels);
+                  }}
+                  className="text-xs px-3 py-1.5"
+                  style={{
+                    border: "2px solid var(--foreground)",
+                    borderRadius: 2,
+                    background: view === v ? "var(--accent)" : "var(--background)",
+                    fontWeight: view === v ? 700 : 400,
+                  }}
+                >
+                  {v === "card" ? "Карточка" : "Граф"}
+                </button>
+              ))}
+            </div>
+          </div>
+
+          {/* граф-постер хранилища */}
+          {view === "graph" && (
+            <div className="card-aubade p-6 space-y-3">
+              <div className="flex items-center justify-between gap-3">
+                <h2 className="font-bold text-xl">Граф твоего хранилища</h2>
+                <label className="text-xs flex items-center gap-1.5" style={{ color: "var(--muted-foreground)" }}>
+                  <input
+                    type="checkbox"
+                    checked={graphLabels}
+                    onChange={(e) => { setGraphLabels(e.target.checked); renderGraph(e.target.checked); }}
+                  />
+                  подписи узлов
+                </label>
+              </div>
+              <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                {stats.graph.nodes.length} самых связанных заметок из твоего хранилища. Имена остаются в браузере.
+              </p>
+              <div className="flex items-center justify-center" style={{ border: "2px solid var(--border)", borderRadius: 2, minHeight: 280, background: "#F5F5F0" }}>
+                {graphBusy ? (
+                  <p className="text-sm py-12" style={{ color: "var(--muted-foreground)" }}>Строю граф…</p>
+                ) : graphUrl ? (
+                  // eslint-disable-next-line @next/next/no-img-element
+                  <img src={graphUrl} alt="Граф хранилища" className="w-full h-auto" style={{ borderRadius: 2 }} />
+                ) : stats.graph.nodes.length === 0 ? (
+                  <p className="text-sm py-12 px-4 text-center" style={{ color: "var(--muted-foreground)" }}>
+                    Слишком мало связей между заметками, чтобы построить граф.
+                  </p>
+                ) : null}
+              </div>
+              {graphUrl && (
+                <a href={graphUrl} download="obsidian-graph.png" className="btn-aubade text-sm inline-block">
+                  Скачать граф (PNG)
+                </a>
+              )}
+            </div>
+          )}
+
+          {/* DOM-карточка результата (ДС-2) */}
+          {view === "card" && (
+          <div className="card-aubade p-6">
+            <h2 className="font-bold text-xl mb-1">Ты — {ARCHETYPE_RU[stats.archetype]}</h2>
+            <p className="text-xs uppercase tracking-widest mb-4" style={{ color: "var(--muted-foreground)" }}>
+              зрелость {stats.score}/100 · период: {PERIOD_RU[stats.period]}
+            </p>
+            <div className="grid grid-cols-3 gap-3 mb-4">
+              {[
+                { n: stats.noteCount, l: "заметок" },
+                { n: stats.linkCount, l: "связей" },
+                { n: stats.tagCount, l: "тегов" },
+              ].map((m) => (
+                <div key={m.l} className="p-3 text-center" style={{ border: "2px solid var(--border)", boxShadow: "4px 4px 0 0 var(--border)" }}>
+                  <p className="text-2xl font-bold">{m.n}</p>
+                  <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>{m.l}</p>
+                </div>
+              ))}
+            </div>
+            {stats.topTags.length > 0 && (
+              <p className="text-sm mb-2">
+                <span className="text-xs uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>Топ-теги: </span>
+                {stats.topTags.map((t) => `#${t.tag}`).join("  ")}
+              </p>
+            )}
+            {stats.achievements.length > 0 && (
+              <div className="flex flex-wrap gap-2 mt-3">
+                {stats.achievements.map((a) => (
+                  <span key={a} className="text-xs px-2 py-1" style={{ background: "var(--accent)", border: "2px solid var(--foreground)", borderRadius: 2 }}>
+                    {a}
+                  </span>
+                ))}
+              </div>
+            )}
+          </div>
+          )}
+
+          {/* действия */}
+          <div className="flex flex-col sm:flex-row gap-3">
+            <button onClick={share} disabled={sharing} className="btn-aubade btn-aubade-accent text-sm flex-1">
+              {sharing ? "Создаю ссылку…" : "Поделиться карточкой"}
+            </button>
+            <button onClick={() => { setScreen("intro"); setStats(null); setShareUrl(""); resetGraph(); }} className="btn-aubade text-sm flex-1">
+              Другое хранилище
+            </button>
+          </div>
+
+          {shareUrl && (
+            <div className="card-aubade p-4 space-y-3">
+              <div>
+                <p className="text-xs uppercase tracking-widest mb-2" style={{ color: "var(--muted-foreground)" }}>Публичная ссылка</p>
+                <a href={shareUrl} target="_blank" rel="noopener noreferrer" className="text-sm underline break-all" style={{ color: "var(--foreground)" }}>
+                  {shareUrl}
+                </a>
+              </div>
+              <a href={`${shareUrl}/opengraph-image`} download className="btn-aubade text-sm inline-block">
+                Скачать картинку (PNG)
+              </a>
+            </div>
+          )}
+          {error && <p className="text-xs" style={{ color: "oklch(0.577 0.245 27.325)" }}>{error}</p>}
+        </div>
+      )}
+    </main>
+  );
+}

src/app/(student)/wrapped/_client/graphPoster.ts

@@ -0,0 +1,69 @@
+// Граф-постер: force-graph (Canvas) в офф-скрин контейнере → PNG. ДС-2-окрас.
+// 100% client-side — имена узлов остаются в браузере, на сервер не уходят.
+
+import ForceGraph from "force-graph";
+import type { GraphData } from "./types";
+
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+const SIZE = 1080;
+const BG = "#F5F5F0";
+const NODE = "#323232";
+const LINK = "#AAAAAA";
+
+export async function renderGraphPoster(graph: GraphData, labels: boolean): Promise<Blob> {
+  const el = document.createElement("div");
+  el.style.cssText = "position:fixed;left:-99999px;top:0;width:1080px;height:1080px;";
+  document.body.appendChild(el);
+
+  try {
+    const fg = (ForceGraph as any)()(el)
+      .width(SIZE)
+      .height(SIZE)
+      .backgroundColor(BG)
+      .graphData({
+        nodes: graph.nodes.map((n) => ({ ...n })),
+        links: graph.links.map((l) => ({ ...l })),
+      })
+      .nodeId("id")
+      .nodeRelSize(labels ? 3 : 2.5)
+      .nodeVal((n: any) => 1 + Math.sqrt(n.deg ?? 1))
+      .nodeColor(() => NODE)
+      .linkColor(() => LINK)
+      .linkWidth(0.4)
+      .enableNodeDrag(false)
+      .enablePointerInteraction(false)
+      .cooldownTime(3500);
+
+    if (labels) {
+      fg.nodeCanvasObjectMode(() => "after").nodeCanvasObject((node: any, ctx: CanvasRenderingContext2D, scale: number) => {
+        if ((node.deg ?? 0) >= 6) {
+          const fontSize = 11 / scale;
+          ctx.font = `${fontSize}px "Fira Mono", monospace`;
+          ctx.fillStyle = NODE;
+          ctx.textBaseline = "middle";
+          ctx.fillText(String(node.id), node.x + 2 + Math.sqrt(node.deg) / scale, node.y);
+        }
+      });
+    }
+
+    // дождаться остановки симуляции (или таймаут)
+    await new Promise<void>((resolve) => {
+      let done = false;
+      const finish = () => { if (!done) { done = true; resolve(); } };
+      fg.onEngineStop(finish);
+      setTimeout(finish, 5000);
+    });
+
+    fg.zoomToFit(0, 50);
+    await new Promise((r) => setTimeout(r, 400));
+
+    const canvas = el.querySelector("canvas") as HTMLCanvasElement | null;
+    if (!canvas) throw new Error("canvas not found");
+    return await new Promise<Blob>((resolve, reject) =>
+      canvas.toBlob((b) => (b ? resolve(b) : reject(new Error("toBlob failed"))), "image/png"),
+    );
+  } finally {
+    document.body.removeChild(el);
+  }
+}

src/app/(student)/wrapped/_client/parse.worker.ts

@@ -0,0 +1,96 @@
+// Web Worker: парсит .md-тексты в агрегаты (off-main, без фриза UI).
+// Получает RawNote[], возвращает Stats. Тексты заметок дальше воркера не идут.
+
+import type { RawNote, Stats, Period, Archetype, GraphData } from "./types";
+
+const WIKILINK = /\[\[([^\]|#]+)/g;
+const TAG = /(^|\s)#([\p{L}\d_/-]+)/gu;
+const DAY = 864e5;
+
+function filterByPeriod(notes: RawNote[], period: Period): RawNote[] {
+  if (period === "all") return notes;
+  const cutoff = Date.now() - (period === "year" ? 365 * DAY : 90 * DAY);
+  return notes.filter((n) => n.mtime >= cutoff);
+}
+
+function buildGraph(degree: Map<string, number>, edges: { source: string; target: string }[]): GraphData {
+  const TOP = 150;
+  const top = [...degree.entries()].sort((a, b) => b[1] - a[1]).slice(0, TOP);
+  const nodes = top.map(([id, deg]) => ({ id, deg }));
+  const ids = new Set(nodes.map((n) => n.id));
+  const links = edges.filter((e) => ids.has(e.source) && ids.has(e.target)).slice(0, 600);
+  return { nodes, links };
+}
+
+function buildStats(
+  notes: RawNote[],
+  degree: Map<string, number>,
+  tags: Map<string, number>,
+  linkCount: number,
+  period: Period,
+  edges: { source: string; target: string }[],
+): Stats {
+  const noteCount = notes.length;
+  const topTags = [...tags.entries()].sort((a, b) => b[1] - a[1]).slice(0, 5).map(([tag, n]) => ({ tag, n }));
+  const topLinked = [...degree.entries()].sort((a, b) => b[1] - a[1]).slice(0, 5).map(([name, d]) => ({ name, degree: d }));
+
+  // Сирота — заметка, на которую никто не ссылается (грубая оценка по имени).
+  const linkedTargets = new Set(degree.keys());
+  const orphans = notes.filter((n) => !linkedTargets.has(n.name.replace(/\.md$/i, ""))).length;
+
+  const months = new Map<string, number>();
+  for (const n of notes) {
+    const d = new Date(n.mtime);
+    const k = `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}`;
+    months.set(k, (months.get(k) ?? 0) + 1);
+  }
+  const busiestMonth = [...months.entries()].sort((a, b) => b[1] - a[1])[0]?.[0] ?? "";
+
+  const linkDensity = noteCount ? linkCount / noteCount : 0;
+  const tagDensity = noteCount ? tags.size / noteCount : 0;
+  const orphanRatio = noteCount ? orphans / noteCount : 1;
+
+  let archetype: Archetype;
+  if (linkDensity >= 2) archetype = "architect";
+  else if (tagDensity >= 0.5) archetype = "librarian";
+  else if (orphanRatio >= 0.4) archetype = "gardener";
+  else archetype = "pragmatist";
+
+  const score = Math.max(0, Math.min(100, Math.round(
+    Math.min(linkDensity / 3, 1) * 45 + Math.min(tagDensity, 1) * 25 + Math.min(noteCount / 300, 1) * 30,
+  )));
+
+  const achievements: string[] = [];
+  if (noteCount >= 100) achievements.push(`${noteCount} заметок`);
+  if (linkCount >= 200) achievements.push(`${linkCount} связей`);
+  if (tags.size >= 30) achievements.push(`${tags.size} тегов`);
+  if (linkDensity >= 3) achievements.push("Плотная сеть знаний");
+  if (orphanRatio < 0.1 && noteCount >= 50) achievements.push("Почти нет сирот");
+
+  return { noteCount, linkCount, tagCount: tags.size, topTags, topLinked, orphans, busiestMonth, achievements, archetype, score, period, graph: buildGraph(degree, edges) };
+}
+
+self.onmessage = (e: MessageEvent<{ notes: RawNote[]; period: Period }>) => {
+  const { notes, period } = e.data;
+  const filtered = filterByPeriod(notes, period);
+  const degree = new Map<string, number>();
+  const tags = new Map<string, number>();
+  let linkCount = 0;
+  const edges: { source: string; target: string }[] = [];
+  for (const n of filtered) {
+    const src = n.name.replace(/\.md$/i, "");
+    for (const m of n.text.matchAll(WIKILINK)) {
+      linkCount++;
+      const t = m[1].trim();
+      if (t) {
+        degree.set(t, (degree.get(t) ?? 0) + 1);
+        edges.push({ source: src, target: t });
+      }
+    }
+    for (const m of n.text.matchAll(TAG)) {
+      const t = m[2];
+      tags.set(t, (tags.get(t) ?? 0) + 1);
+    }
+  }
+  self.postMessage(buildStats(filtered, degree, tags, linkCount, period, edges));
+};

src/app/(student)/wrapped/_client/reader.ts

@@ -0,0 +1,79 @@
+// Чтение хранилища в браузере — три пути ввода, все → RawNote[].
+// Содержимое заметок остаётся в браузере (приватность-моат).
+
+import type { RawNote } from "./types";
+
+const SKIP = ["/.obsidian/", "/.trash/", "/.git/"];
+function isMd(path: string): boolean {
+  return path.toLowerCase().endsWith(".md") && !SKIP.some((s) => path.includes(s));
+}
+
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+export function supportsFSA(): boolean {
+  return typeof window !== "undefined" && "showDirectoryPicker" in window;
+}
+
+// 1. File System Access API (Chromium: Chrome/Edge/Brave)
+export async function readViaFSA(): Promise<RawNote[]> {
+  const dir: any = await (window as any).showDirectoryPicker();
+  const notes: RawNote[] = [];
+  async function walk(handle: any, prefix: string): Promise<void> {
+    for await (const [name, h] of handle.entries()) {
+      const path = prefix + "/" + name;
+      if (h.kind === "directory") {
+        if (name.startsWith(".")) continue;
+        await walk(h, path);
+      } else if (isMd(path)) {
+        const file: File = await h.getFile();
+        notes.push({ name, text: await file.text(), ctime: file.lastModified, mtime: file.lastModified });
+      }
+    }
+  }
+  await walk(dir, "");
+  return notes;
+}
+
+// 2. <input type="file" webkitdirectory> (Safari / Firefox)
+export async function readViaInput(files: FileList): Promise<RawNote[]> {
+  const notes: RawNote[] = [];
+  for (const file of Array.from(files)) {
+    const path = (file as any).webkitRelativePath || file.name;
+    if (!isMd(path)) continue;
+    notes.push({ name: file.name, text: await file.text(), ctime: file.lastModified, mtime: file.lastModified });
+  }
+  return notes;
+}
+
+// 3. drag-drop папки (webkitGetAsEntry)
+export async function readViaDrop(items: DataTransferItemList): Promise<RawNote[]> {
+  const notes: RawNote[] = [];
+  const roots: any[] = [];
+  for (const item of Array.from(items)) {
+    const entry = (item as any).webkitGetAsEntry?.();
+    if (entry) roots.push(entry);
+  }
+  async function readEntry(entry: any, prefix: string): Promise<void> {
+    const path = prefix + "/" + entry.name;
+    if (entry.isDirectory) {
+      if (entry.name.startsWith(".")) return;
+      const reader = entry.createReader();
+      const children: any[] = await new Promise((resolve) => {
+        const all: any[] = [];
+        const readBatch = () =>
+          reader.readEntries((batch: any[]) => {
+            if (!batch.length) return resolve(all);
+            all.push(...batch);
+            readBatch();
+          });
+        readBatch();
+      });
+      for (const c of children) await readEntry(c, path);
+    } else if (isMd(path)) {
+      const file: File = await new Promise((resolve, reject) => entry.file(resolve, reject));
+      notes.push({ name: entry.name, text: await file.text(), ctime: file.lastModified, mtime: file.lastModified });
+    }
+  }
+  for (const e of roots) await readEntry(e, "");
+  return notes;
+}

src/app/(student)/wrapped/_client/types.ts

@@ -0,0 +1,46 @@
+// Сквозные типы Obsidian Wrapped (общие: reader, worker, рендер, API).
+// Приватность: имена/тексты заметок живут ТОЛЬКО в браузере; в БД/сеть уходят
+// лишь числовые/строковые агрегаты (RunPayload).
+
+export type Archetype = "architect" | "gardener" | "librarian" | "pragmatist";
+export type Period = "year" | "quarter" | "all";
+
+// Граф для постера (топ-N узлов по степени). Имена живут только в браузере.
+export interface GraphData {
+  nodes: { id: string; deg: number }[];
+  links: { source: string; target: string }[];
+}
+
+export interface Stats {
+  noteCount: number;
+  linkCount: number;
+  tagCount: number;
+  topTags: { tag: string; n: number }[]; // top-5
+  topLinked: { name: string; degree: number }[]; // top-5 самых связанных
+  orphans: number;
+  busiestMonth: string; // "2026-03"
+  achievements: string[];
+  archetype: Archetype;
+  score: number; // 0..100
+  period: Period;
+  graph: GraphData; // топ-N узлов/рёбер для граф-постера (не уходит в БД)
+}
+
+// Сырьё — НИКОГДА не покидает браузер.
+export interface RawNote {
+  name: string;
+  text: string;
+  ctime: number;
+  mtime: number;
+}
+
+// То, что реально уходит в POST /api/wrapped/run — БЕЗ имён/текстов.
+export interface RunPayload {
+  period: Period;
+  noteCount: number;
+  linkCount: number;
+  tagCount: number;
+  topTag: string | null;
+  archetype: Archetype;
+  score: number;
+}

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

@@ -0,0 +1,11 @@
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { WrappedClient } from "./WrappedClient";
+
+// Авторизованный генератор Obsidian Wrapped. Гость → /register (приток из публичной карточки).
+export default async function WrappedPage() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) redirect("/register");
+  return <WrappedClient userName={session.user.name} />;
+}

src/app/api/internal/quiz-lead/route.ts

@@ -0,0 +1,151 @@
+import { NextResponse } from "next/server";
+
+const ARCHETYPES = ["architect", "gardener", "librarian", "pragmatist"] as const;
+type Archetype = (typeof ARCHETYPES)[number];
+
+interface ListmonkSubscriber {
+  id: number;
+}
+
+interface ListmonkSearchResult {
+  data?: {
+    results?: ListmonkSubscriber[];
+  };
+}
+
+function buildAuth(): string {
+  return (
+    "Basic " +
+    Buffer.from(
+      `${process.env.LISTMONK_USER}:${process.env.LISTMONK_TOKEN}`,
+    ).toString("base64")
+  );
+}
+
+function listmonkUrl(path: string): string {
+  return `${process.env.LISTMONK_URL}${path}`;
+}
+
+function getListId(): number {
+  return Number(process.env.LISTMONK_QUIZ_LIST_ID);
+}
+
+function isValidEmail(email: string): boolean {
+  return /^[^@]+@[^@]+\.[^@]+$/.test(email);
+}
+
+function isValidArchetype(value: string): value is Archetype {
+  return (ARCHETYPES as readonly string[]).includes(value);
+}
+
+/**
+ * POST /api/internal/quiz-lead
+ *
+ * Receives a completed Typebot quiz lead and idempotently upserts
+ * the subscriber in Listmonk with archetype + score attributes.
+ *
+ * Auth: x-quiz-secret header must match QUIZ_LEAD_SECRET env var.
+ */
+export async function POST(req: Request): Promise<NextResponse> {
+  // --- Auth ---
+  const secret = req.headers.get("x-quiz-secret");
+  if (!secret || secret !== process.env.QUIZ_LEAD_SECRET) {
+    return NextResponse.json({ error: "unauthorized" }, { status: 401 });
+  }
+
+  // --- Parse body ---
+  let body: unknown;
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "bad json" }, { status: 400 });
+  }
+
+  // --- Validate fields ---
+  const raw = body as Record<string, unknown>;
+  const email = String(raw.email ?? "")
+    .trim()
+    .toLowerCase();
+  const archetype = String(raw.archetype ?? "");
+  const score = Number(raw.score);
+
+  if (!isValidEmail(email) || !isValidArchetype(archetype) || !Number.isFinite(score)) {
+    return NextResponse.json({ error: "invalid fields" }, { status: 400 });
+  }
+
+  const attribs = {
+    archetype,
+    score,
+    utm_source: raw.utm_source != null ? String(raw.utm_source) : null,
+    utm_medium: raw.utm_medium != null ? String(raw.utm_medium) : null,
+    utm_campaign: raw.utm_campaign != null ? String(raw.utm_campaign) : null,
+  };
+
+  const auth = buildAuth();
+  const listId = getListId();
+
+  // --- Upsert to Listmonk ---
+  try {
+    const createRes = await fetch(listmonkUrl("/api/subscribers"), {
+      method: "POST",
+      headers: { "Content-Type": "application/json", Authorization: auth },
+      body: JSON.stringify({
+        email,
+        name: email.split("@")[0],
+        lists: [listId],
+        attribs,
+        status: "enabled",
+        preconfirm_subscriptions: true,
+      }),
+    });
+
+    if (createRes.status === 409) {
+      // Subscriber exists — look up by email and update
+      const searchRes = await fetch(
+        listmonkUrl("/api/subscribers?query=") +
+          encodeURIComponent(`subscribers.email='${email}'`),
+        { headers: { Authorization: auth } },
+      );
+      const searchJson = (await searchRes.json()) as ListmonkSearchResult;
+      const existingId = searchJson?.data?.results?.[0]?.id;
+
+      if (!existingId) {
+        console.error("quiz-lead: subscriber lookup failed for", email);
+        return NextResponse.json({ error: "lookup failed" }, { status: 502 });
+      }
+
+      const updateRes = await fetch(listmonkUrl(`/api/subscribers/${existingId}`), {
+        method: "PUT",
+        headers: { "Content-Type": "application/json", Authorization: auth },
+        body: JSON.stringify({
+          email,
+          name: email.split("@")[0],
+          lists: [listId],
+          attribs,
+          status: "enabled",
+        }),
+      });
+
+      if (!updateRes.ok) {
+        console.error(
+          "quiz-lead: subscriber update failed",
+          updateRes.status,
+          await updateRes.text(),
+        );
+        return NextResponse.json({ error: "listmonk" }, { status: 502 });
+      }
+    } else if (!createRes.ok) {
+      console.error(
+        "quiz-lead: listmonk create failed",
+        createRes.status,
+        await createRes.text(),
+      );
+      return NextResponse.json({ error: "listmonk" }, { status: 502 });
+    }
+  } catch (e) {
+    console.error("quiz-lead: upstream error", e);
+    return NextResponse.json({ error: "upstream" }, { status: 502 });
+  }
+
+  return NextResponse.json({ ok: true });
+}

src/app/api/pdf/route.ts

@@ -0,0 +1,84 @@
+import { NextRequest, NextResponse } from "next/server";
+import { z } from "zod";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import {
+  BURST_LIMIT, PDF_TOOL_ID, getBurstUsage, getMonthlyLimit, getMonthlyUsage, hasPaidAccess,
+} from "@/lib/clean-pdf/access";
+import { BlockedUrlError } from "@/lib/clean-pdf/ssrf";
+import { EmptyContentError, RenderError, generateCleanPdf } from "@/lib/clean-pdf/generate";
+import { safePdfFilename } from "@/lib/clean-pdf/template";
+import { PDF_KEY_PREFIX } from "@/lib/clean-pdf/api-key";
+
+export const dynamic = "force-dynamic";
+
+const querySchema = z.object({
+  url: z.string().min(1).max(2000),
+  format: z.enum(["A4", "Letter"]).default("A4"),
+  theme: z.enum(["light", "dark"]).default("light"),
+});
+
+function jsonError(status: number, error: string, extra?: Record<string, string>) {
+  return NextResponse.json({ error }, { status, headers: extra });
+}
+
+async function resolveUserId(req: NextRequest): Promise<string | null> {
+  const authHeader = req.headers.get("authorization");
+  if (authHeader?.startsWith("Bearer ")) {
+    const key = authHeader.slice("Bearer ".length).trim();
+    if (!key.startsWith(PDF_KEY_PREFIX)) return null;
+    const record = await prisma.pdfApiKey.findUnique({ where: { key }, select: { userId: true } });
+    return record?.userId ?? null;
+  }
+  const session = await auth.api.getSession({ headers: req.headers });
+  return session?.user.id ?? null;
+}
+
+export async function GET(req: NextRequest) {
+  try {
+    const userId = await resolveUserId(req);
+    if (!userId) return jsonError(401, "Нужен API-ключ или вход в аккаунт школы");
+
+    if (!(await hasPaidAccess(userId))) {
+      return jsonError(403, "Инструмент доступен студентам платных курсов школы");
+    }
+
+    const parsed = querySchema.safeParse(Object.fromEntries(req.nextUrl.searchParams));
+    if (!parsed.success) return jsonError(422, "Проверьте параметры: url, format (A4|Letter), theme (light|dark)");
+
+    if ((await getBurstUsage(userId)) >= BURST_LIMIT) {
+      return jsonError(429, "Слишком часто: подождите минуту", { "X-Max-Uses": String(getMonthlyLimit()) });
+    }
+    const limit = getMonthlyLimit();
+    const used = await getMonthlyUsage(userId);
+    if (used >= limit) {
+      return jsonError(429, `Лимит ${limit} PDF в месяц исчерпан`, {
+        "X-Uses-Count": String(used), "X-Max-Uses": String(limit),
+      });
+    }
+
+    const { pdf, title } = await generateCleanPdf(parsed.data);
+    await prisma.toolUsage.create({ data: { userId, tool: PDF_TOOL_ID } });
+
+    const filename = safePdfFilename(title);
+    return new NextResponse(new Uint8Array(pdf), {
+      status: 200,
+      headers: {
+        "Content-Type": "application/pdf",
+        "Content-Disposition": `attachment; filename="document.pdf"; filename*=UTF-8''${encodeURIComponent(filename)}.pdf`,
+        "X-Uses-Count": String(used + 1),
+        "X-Max-Uses": String(limit),
+      },
+    });
+  } catch (e) {
+    if (e instanceof BlockedUrlError || e instanceof EmptyContentError) {
+      return jsonError(422, e.message);
+    }
+    if (e instanceof RenderError) {
+      console.error("[clean-pdf] render", e);
+      return jsonError(504, "Не получилось отрендерить страницу, попробуйте позже");
+    }
+    console.error("[clean-pdf]", e);
+    return jsonError(504, "Не получилось сгенерировать PDF, попробуйте позже");
+  }
+}

src/app/api/questions/[id]/messages/route.ts

@@ -3,6 +3,7 @@ import { headers } from "next/headers";
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
 import { sendQuestionFollowUpEmail, sendQuestionReplyEmail } from "@/lib/email";
+import { isAllowedPublicUrl } from "@/lib/s3";
 
 interface FileAttachment {
   name: string;
@@ -10,13 +11,6 @@ interface FileAttachment {
   size: number;
 }
 
-function buildS3Prefix(): string {
-  const endpoint = process.env.S3_ENDPOINT ?? "";
-  const bucket = process.env.S3_BUCKET ?? "";
-  // e.g. https://fsn1.your-objectstorage.com/lms-uploads/
-  return `${endpoint}/${bucket}/`;
-}
-
 export async function POST(
   req: NextRequest,
   { params }: { params: Promise<{ id: string }> }
@@ -52,14 +46,11 @@ export async function POST(
     return NextResponse.json({ error: "text is required" }, { status: 400 });
   }
 
-  const s3Prefix = buildS3Prefix();
   const safeFiles = files
     ?.filter(
       (f) =>
         typeof f.name === "string" &&
-        typeof f.url === "string" &&
-        f.url.startsWith("https://") &&
-        f.url.startsWith(s3Prefix) &&
+        isAllowedPublicUrl(f.url) &&
         typeof f.size === "number"
     )
     .map((f) => ({ name: f.name.slice(0, 255), url: f.url, size: Math.max(0, f.size) }));

src/app/api/questions/route.ts

@@ -3,6 +3,7 @@ import { headers } from "next/headers";
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
 import { sendQuestionCreatedEmail } from "@/lib/email";
+import { isAllowedPublicUrl } from "@/lib/s3";
 
 interface FileAttachment {
   name: string;
@@ -10,12 +11,6 @@ interface FileAttachment {
   size: number;
 }
 
-function buildS3Prefix(): string {
-  const endpoint = process.env.S3_ENDPOINT ?? "";
-  const bucket = process.env.S3_BUCKET ?? "";
-  return `${endpoint}/${bucket}/`;
-}
-
 export async function GET() {
   const session = await auth.api.getSession({ headers: await headers() });
   if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
@@ -82,14 +77,11 @@ export async function POST(req: NextRequest) {
     return NextResponse.json({ error: "title and text are required" }, { status: 400 });
   }
 
-  const s3Prefix = buildS3Prefix();
   const safeFiles = files
     ?.filter(
       (f) =>
         typeof f.name === "string" &&
-        typeof f.url === "string" &&
-        f.url.startsWith("https://") &&
-        f.url.startsWith(s3Prefix) &&
+        isAllowedPublicUrl(f.url) &&
         typeof f.size === "number"
     )
     .map((f) => ({ name: f.name.slice(0, 255), url: f.url, size: Math.max(0, f.size) }));

src/app/api/register/route.ts

@@ -37,7 +37,7 @@ export async function POST(request: NextRequest) {
     return jsonError("Неверный формат запроса", 400);
   }
 
-  const { name, email, password, website, cfTurnstileResponse } = body;
+  const { name, email, password, website, cfTurnstileResponse, archetype, utmSource, utmMedium, utmCampaign } = body;
 
   // Honeypot — bots fill this field, humans don't see it
   if (website) {
@@ -102,6 +102,19 @@ export async function POST(request: NextRequest) {
           select: { id: true },
         }),
       ]);
+      // Тип второго мозга из квиза + UTM — сохраняем на юзере для персонализации
+      const VALID_ARCHETYPES = ["architect", "gardener", "librarian", "pragmatist"];
+      if (user && (archetype || utmSource || utmMedium || utmCampaign)) {
+        await prisma.user.update({
+          where: { id: user.id },
+          data: {
+            archetype: VALID_ARCHETYPES.includes(String(archetype)) ? String(archetype) : null,
+            utmSource: utmSource ? String(utmSource) : null,
+            utmMedium: utmMedium ? String(utmMedium) : null,
+            utmCampaign: utmCampaign ? String(utmCampaign) : null,
+          },
+        });
+      }
       if (user && course) {
         await prisma.courseEnrollment.upsert({
           where: { userId_courseId: { userId: user.id, courseId: course.id } },

src/app/api/wrapped/run/route.ts

@@ -0,0 +1,47 @@
+import { NextResponse } from "next/server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { randomBytes } from "crypto";
+
+// Пишет агрегаты прогона Wrapped. userId — строго из сессии, не из тела.
+// Имена/тексты заметок сюда не приходят (только числа/строки-агрегаты).
+export async function POST(req: Request) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) return NextResponse.json({ error: "unauthorized" }, { status: 401 });
+
+  let b: {
+    period?: string;
+    noteCount?: number;
+    linkCount?: number;
+    tagCount?: number;
+    topTag?: string | null;
+    archetype?: string | null;
+    score?: number;
+  };
+  try {
+    b = await req.json();
+  } catch {
+    return NextResponse.json({ error: "bad json" }, { status: 400 });
+  }
+
+  const period = ["year", "quarter", "all"].includes(String(b.period)) ? String(b.period) : "year";
+  const VALID = ["architect", "gardener", "librarian", "pragmatist"];
+
+  const run = await prisma.wrappedRun.create({
+    data: {
+      userId: session.user.id,
+      period,
+      noteCount: Number(b.noteCount) || 0,
+      linkCount: Number(b.linkCount) || 0,
+      tagCount: Number(b.tagCount) || 0,
+      topTag: b.topTag ? String(b.topTag).slice(0, 60) : null,
+      archetype: VALID.includes(String(b.archetype)) ? String(b.archetype) : null,
+      score: Math.max(0, Math.min(100, Number(b.score) || 0)),
+      shareToken: randomBytes(9).toString("base64url"),
+    },
+    select: { shareToken: true },
+  });
+
+  return NextResponse.json({ shareToken: run.shareToken });
+}

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

@@ -108,6 +108,51 @@ export async function setReviewing(submissionId: string) {
   revalidatePath(`/curator/homework/${submissionId}`);
 }
 
+/**
+ * Принять ДЗ без письменного ответа: ставим APPROVED и засчитываем урок,
+ * фидбек не создаём и студенту письмо не шлём (тихое принятие).
+ */
+export async function approveWithoutFeedback(submissionId: string) {
+  await requireCurator();
+
+  const submission = await prisma.homeworkSubmission.findUnique({
+    where: { id: submissionId },
+    include: {
+      homework: {
+        include: {
+          lesson: {
+            select: {
+              id: true,
+              module: { select: { course: { select: { slug: true } } } },
+            },
+          },
+        },
+      },
+    },
+  });
+  if (!submission) throw new Error("Submission not found");
+
+  const lesson = submission.homework.lesson;
+
+  await prisma.$transaction(async (tx) => {
+    await tx.homeworkSubmission.update({
+      where: { id: submissionId },
+      data: { status: "APPROVED", statusAt: new Date() },
+    });
+    await tx.lessonProgress.upsert({
+      where: { userId_lessonId: { userId: submission.userId, lessonId: lesson.id } },
+      create: { userId: submission.userId, lessonId: lesson.id },
+      update: {},
+    });
+  });
+
+  revalidatePath("/curator/homework");
+  revalidatePath(`/curator/homework/${submissionId}`);
+  revalidatePath(`/courses/${lesson.module.course.slug}/lessons/${lesson.id}`);
+  revalidatePath(`/courses/${lesson.module.course.slug}`);
+  revalidatePath("/dashboard");
+}
+
 export async function deleteSubmission(submissionId: string) {
   await requireCurator();
   await prisma.homeworkSubmission.delete({ where: { id: submissionId } });

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

@@ -3,7 +3,7 @@
 import { useState, useTransition, useRef } from "react";
 import { useRouter } from "next/navigation";
 import Link from "next/link";
-import { submitFeedback, setReviewing } from "./actions";
+import { submitFeedback, setReviewing, approveWithoutFeedback } from "./actions";
 import { AudioRecorder } from "@/components/curator/audio-recorder";
 
 interface FileItem {
@@ -69,6 +69,13 @@ export function FeedbackForm({
     });
   }
 
+  function handleApproveNoFeedback() {
+    startTransition(async () => {
+      await approveWithoutFeedback(submissionId);
+      router.push("/curator/homework");
+    });
+  }
+
   const isWorking = pending || uploading;
 
   return (
@@ -164,6 +171,17 @@ export function FeedbackForm({
           {pending ? "Отправка..." : "Отправить ответ"}
         </button>
 
+        <button
+          type="button"
+          onClick={handleApproveNoFeedback}
+          disabled={isWorking}
+          className="btn-aubade px-4 py-2 text-sm"
+          style={{ opacity: isWorking ? 0.5 : 1 }}
+          title="Засчитать ДЗ без письменного ответа"
+        >
+          Принять и отметить выполненным
+        </button>
+
         {currentStatus !== "REVIEWING" && (
           <button
             type="button"

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

@@ -1,6 +1,7 @@
 import { prisma } from "@/lib/prisma";
 import { notFound } from "next/navigation";
 import Link from "next/link";
+import { linkify } from "@/lib/linkify";
 import { FeedbackForm } from "./feedback-form";
 import { ContentTabs } from "./content-tabs";
 import { DeleteSubmissionButton } from "./delete-button";
@@ -151,7 +152,7 @@ export default async function SubmissionPage({ params }: Props) {
             className="px-4 py-3 text-sm whitespace-pre-wrap"
             style={{ border: "2px solid var(--border)" }}
           >
-            {submission.text}
+            {linkify(submission.text)}
           </div>
         ) : (
           <p className="text-sm italic" style={{ color: "var(--muted-foreground)" }}>

src/app/curator/homework/page.tsx

@@ -166,9 +166,22 @@ export default async function HomeworkListPage({ searchParams }: Props) {
         <div className="space-y-1.5">
           {submissions.map((s) => {
             const hasReview = s.feedbacks.length > 0;
-            const reviewBadge = hasReview
-              ? { label: "С отзывом", bg: "oklch(0.88 0.1 145)", color: "oklch(0.35 0.15 145)" }
-              : { label: "Без ответа", bg: "var(--foreground)", color: "var(--background)" };
+            // Метка по статусу проверки, а не только по наличию письменного отзыва:
+            // принятое кнопкой ДЗ (APPROVED без фидбека) — это «Принято», не «Без ответа».
+            let reviewBadge: { label: string; bg: string; color: string };
+            if (s.status === "APPROVED") {
+              reviewBadge = {
+                label: hasReview ? "С отзывом" : "Принято",
+                bg: "oklch(0.88 0.1 145)",
+                color: "oklch(0.35 0.15 145)",
+              };
+            } else if (s.status === "REJECTED") {
+              reviewBadge = { label: "Отклонено", bg: "oklch(0.9 0.06 27)", color: "oklch(0.45 0.2 27)" };
+            } else if (s.status === "REVIEWING") {
+              reviewBadge = { label: "На рассмотрении", bg: "oklch(0.9 0.08 80)", color: "oklch(0.4 0.1 80)" };
+            } else {
+              reviewBadge = { label: "Без ответа", bg: "var(--foreground)", color: "var(--background)" };
+            }
             return (
               <Link
                 key={s.id}

src/app/layout.tsx

@@ -2,6 +2,7 @@ import type { Metadata } from "next";
 import { Fira_Mono } from "next/font/google";
 import "./globals.css";
 import { getSettings } from "@/lib/settings";
+import { HtmlInjector } from "@/components/layout/html-injector";
 
 const firaMono = Fira_Mono({
   weight: ["400", "500", "700"],
@@ -28,14 +29,13 @@ export default async function RootLayout({
 
   return (
     <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">
+        {/* Код внедрения инжектится через DOM после гидрации (HtmlInjector),
+            а НЕ через <head dangerouslySetInnerHTML> — иначе ручной <head>
+            затирает хойстнутый React'ом <link rel="stylesheet"> и слетает дизайн. */}
+        {settings.headCode ? <HtmlInjector html={settings.headCode} target="head" /> : null}
         {children}
-        {settings.bodyCode ? (
-          <div dangerouslySetInnerHTML={{ __html: settings.bodyCode }} />
-        ) : null}
+        {settings.bodyCode ? <HtmlInjector html={settings.bodyCode} target="body" /> : null}
       </body>
     </html>
   );

src/app/page.tsx

@@ -1,12 +1,13 @@
 import { redirect } from "next/navigation";
 import { headers } from "next/headers";
 import { auth } from "@/lib/auth";
+import { WelcomePage } from "@/components/welcome/welcome-page";
 
 export default async function HomePage() {
   const session = await auth.api.getSession({ headers: await headers() });
 
   if (!session) {
-    redirect("/login");
+    return <WelcomePage />;
   }
 
   const role = session.user.role;

src/app/share/wrapped/[token]/opengraph-image.tsx

@@ -0,0 +1,42 @@
+import { ImageResponse } from "next/og";
+import { readFile } from "fs/promises";
+import path from "path";
+import { prisma } from "@/lib/prisma";
+import { wrappedCard } from "@/lib/wrapped-card";
+import type { Archetype, Period } from "@/app/(student)/wrapped/_client/types";
+
+export const size = { width: 1080, height: 1920 };
+export const contentType = "image/png";
+export const dynamic = "force-dynamic";
+
+// Серверный PNG 1080×1920 карточки Wrapped по shareToken (для OG-превью в соцсетях
+// и для скачивания участником). Рендерится через next/og (Satori + resvg-wasm).
+export default async function OG({ params }: { params: Promise<{ token: string }> }) {
+  const { token } = await params;
+  const run = await prisma.wrappedRun.findUnique({ where: { shareToken: token } });
+
+  const [reg, med] = await Promise.all([
+    readFile(path.join(process.cwd(), "public/fonts/FiraMono-Regular.ttf")),
+    readFile(path.join(process.cwd(), "public/fonts/FiraMono-Medium.ttf")),
+  ]);
+
+  const data = run
+    ? {
+        noteCount: run.noteCount,
+        linkCount: run.linkCount,
+        tagCount: run.tagCount,
+        topTag: run.topTag,
+        archetype: run.archetype as Archetype | null,
+        score: run.score,
+        period: run.period as Period,
+      }
+    : { noteCount: 0, linkCount: 0, tagCount: 0, topTag: null, archetype: null, score: 0, period: "year" as Period };
+
+  return new ImageResponse(wrappedCard(data), {
+    ...size,
+    fonts: [
+      { name: "Fira Mono", data: reg, weight: 400, style: "normal" as const },
+      { name: "Fira Mono", data: med, weight: 500, style: "normal" as const },
+    ],
+  });
+}

src/app/share/wrapped/[token]/page.tsx

@@ -0,0 +1,92 @@
+import { prisma } from "@/lib/prisma";
+import { notFound } from "next/navigation";
+import Link from "next/link";
+import type { Metadata } from "next";
+
+const ARCHETYPE_RU: Record<string, string> = {
+  architect: "Архитектор",
+  gardener: "Садовник",
+  librarian: "Библиотекарь",
+  pragmatist: "Прагматик",
+};
+
+export async function generateMetadata({ params }: { params: Promise<{ token: string }> }): Promise<Metadata> {
+  const { token } = await params;
+  return {
+    title: "Моя карта знаний в Obsidian — Second Brain",
+    description: "Я собрал статистику своего хранилища знаний. Сделай свою карточку.",
+    openGraph: {
+      title: "Моя карта знаний в Obsidian",
+      description: "Statистика хранилища в Obsidian — Second Brain Wrapped.",
+      images: [{ url: `/share/wrapped/${token}/opengraph-image`, width: 1080, height: 1920 }],
+    },
+    twitter: { card: "summary_large_image" },
+  };
+}
+
+// Публичная страница карточки (без сессии). Показывает только агрегаты — никаких имён заметок.
+export default async function SharePage({ params }: { params: Promise<{ token: string }> }) {
+  const { token } = await params;
+  const run = await prisma.wrappedRun.findUnique({ where: { shareToken: token } });
+  if (!run) notFound();
+
+  const metric = (n: number, l: string) => (
+    <div
+      key={l}
+      style={{ display: "flex", flexDirection: "column", alignItems: "center", padding: "16px 12px", background: "#FFFFFF", border: "2px solid var(--border)", boxShadow: "4px 4px 0 0 var(--border)" }}
+    >
+      <span style={{ fontSize: 32, fontWeight: 700 }}>{n}</span>
+      <span style={{ fontSize: 12, color: "var(--muted-foreground)", textTransform: "uppercase", letterSpacing: 1 }}>{l}</span>
+    </div>
+  );
+
+  return (
+    <main style={{ background: "var(--background)", color: "var(--foreground)", minHeight: "100vh", display: "flex", flexDirection: "column", alignItems: "center", padding: "48px 24px" }}>
+      <div style={{ width: "100%", maxWidth: 480 }}>
+        <p style={{ fontSize: 12, fontWeight: 700, textTransform: "uppercase", letterSpacing: 3, color: "var(--muted-foreground)", marginBottom: 8 }}>
+          Obsidian Wrapped · 2026
+        </p>
+        <h1 style={{ fontSize: 28, fontWeight: 700, margin: "0 0 4px" }}>
+          {run.archetype ? ARCHETYPE_RU[run.archetype] : "Карта знаний"}
+        </h1>
+        <p style={{ fontSize: 13, textTransform: "uppercase", letterSpacing: 2, color: "var(--muted-foreground)", margin: "0 0 24px" }}>
+          зрелость {run.score}/100
+        </p>
+
+        <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr 1fr", gap: 12, marginBottom: 20 }}>
+          {metric(run.noteCount, "заметок")}
+          {metric(run.linkCount, "связей")}
+          {metric(run.tagCount, "тегов")}
+        </div>
+
+        {run.topTag && (
+          <div style={{ padding: "16px 20px", background: "var(--accent)", border: "2px solid var(--foreground)", marginBottom: 24, fontSize: 16 }}>
+            Топ-тег: #{run.topTag}
+          </div>
+        )}
+
+        <div style={{ display: "flex", flexDirection: "column", gap: 12 }}>
+          <Link
+            href="/register"
+            className="btn-aubade btn-aubade-accent"
+            style={{ textAlign: "center", fontSize: 15, fontWeight: 700, padding: "14px" }}
+          >
+            Сделать свою карточку →
+          </Link>
+          <a
+            href={`/share/wrapped/${token}/opengraph-image`}
+            download={`obsidian-wrapped-${token}.png`}
+            className="btn-aubade"
+            style={{ textAlign: "center", fontSize: 14, padding: "12px" }}
+          >
+            Скачать картинку (1080×1920)
+          </a>
+        </div>
+
+        <p style={{ fontSize: 12, color: "var(--muted-foreground)", marginTop: 28, textAlign: "center" }}>
+          🔒 Здесь только числа. Содержимое заметок остаётся на устройстве автора.
+        </p>
+      </div>
+    </main>
+  );
+}

src/components/admin/settings-form.tsx

@@ -274,6 +274,11 @@ export function SettingsForm({ initial }: { initial: Settings }) {
             checked={bool("notifyOnHomework")}
             onChange={(v) => set("notifyOnHomework", v ? "true" : "false")}
           />
+          <Toggle
+            label="Уведомлять о новом комментарии под уроком"
+            checked={bool("notifyOnComment")}
+            onChange={(v) => set("notifyOnComment", v ? "true" : "false")}
+          />
           <Toggle
             label="Уведомлять о новой регистрации ученика"
             checked={bool("notifyOnRegistration")}

src/components/layout/html-injector.tsx

@@ -0,0 +1,44 @@
+"use client";
+
+import { useEffect } from "react";
+
+/**
+ * Безопасно инжектит произвольный HTML (код внедрения из Настроек) в <head> или
+ * <body> ЧЕРЕЗ DOM после гидрации.
+ *
+ * Почему не <head dangerouslySetInnerHTML>: в App Router + React 19 ручной <head>
+ * при гидрации затирает хойстнутый React'ом <link rel="stylesheet"> → весь дизайн
+ * слетает. Этот компонент добавляет узлы программно, не трогая управление head,
+ * поэтому стили остаются на месте. <script> из innerHTML не исполняются — поэтому
+ * пересоздаём их как настоящие script-элементы.
+ */
+export function HtmlInjector({ html, target }: { html: string; target: "head" | "body" }) {
+  useEffect(() => {
+    if (!html) return;
+    const dest = target === "head" ? document.head : document.body;
+    const tpl = document.createElement("template");
+    tpl.innerHTML = html;
+
+    const added: Node[] = [];
+    Array.from(tpl.content.childNodes).forEach((node) => {
+      let toAppend: Node;
+      if (node.nodeName === "SCRIPT") {
+        const orig = node as HTMLScriptElement;
+        const s = document.createElement("script");
+        for (const attr of Array.from(orig.attributes)) s.setAttribute(attr.name, attr.value);
+        s.textContent = orig.textContent;
+        toAppend = s;
+      } else {
+        toAppend = node.cloneNode(true);
+      }
+      dest.appendChild(toAppend);
+      added.push(toAppend);
+    });
+
+    return () => {
+      added.forEach((n) => n.parentNode?.removeChild(n));
+    };
+  }, [html, target]);
+
+  return null;
+}

src/components/student/archetype-banner.tsx

@@ -0,0 +1,68 @@
+// Персональный блок «твой путь» по типу второго мозга из квиза.
+// Server component, без клиентского кода. ДС-2 (Aubade).
+
+const TRIPWIRE_URL = "https://second-brain.ru/entrepreneur";
+
+const ARCHETYPE_INFO: Record<
+  string,
+  { emoji: string; name: string; desc: string; cta: string; href: string }
+> = {
+  architect: {
+    emoji: "🏛",
+    name: "Архитектор",
+    desc: "Ты мыслишь системами: структура, иерархия, порядок. Тебе подойдёт системный путь.",
+    cta: "Полный курс «Obsidian»",
+    href: "https://obsidian.second-brain.ru/",
+  },
+  gardener: {
+    emoji: "🌱",
+    name: "Садовник",
+    desc: "Ты выращиваешь идеи и связи. Тебе подойдёт работа с мышлением и AI.",
+    cta: "Курс «Obsidian + AI»",
+    href: "https://obsidianai.second-brain.ru/",
+  },
+  librarian: {
+    emoji: "📚",
+    name: "Библиотекарь",
+    desc: "Ты собираешь и хранишь надёжно. Начни с готового хранилища и руководств.",
+    cta: "Демо-хранилище",
+    href: "https://second-brain.ru/sb-vault",
+  },
+  pragmatist: {
+    emoji: "⚡",
+    name: "Прагматик",
+    desc: "Тебе важен результат: заметки работают на дело, а не ради заметок.",
+    cta: "Второй мозг для предпринимателя",
+    href: TRIPWIRE_URL,
+  },
+};
+
+export function ArchetypeBanner({ archetype }: { archetype: string }) {
+  const info = ARCHETYPE_INFO[archetype];
+  if (!info) return null;
+
+  return (
+    <div className="card-aubade p-5 mb-8" style={{ background: "var(--accent)" }}>
+      <p
+        className="text-xs font-bold uppercase tracking-widest mb-1"
+        style={{ color: "var(--muted-foreground)" }}
+      >
+        Твой тип второго мозга
+      </p>
+      <h2 className="font-bold text-lg mb-1">
+        {info.emoji} {info.name}
+      </h2>
+      <p className="text-sm mb-3" style={{ color: "var(--foreground)" }}>
+        {info.desc} Начни с бесплатного курса «Obsidian. Старт» ниже — а когда захочешь дальше, тебе откроется:
+      </p>
+      <a
+        href={info.href}
+        target="_blank"
+        rel="noopener noreferrer"
+        className="btn-aubade text-sm inline-block"
+      >
+        {info.cta} →
+      </a>
+    </div>
+  );
+}

src/components/student/gate-view-tracker.tsx

@@ -0,0 +1,20 @@
+"use client";
+
+import { useEffect } from "react";
+
+declare global {
+  interface Window {
+    ym?: (counterId: number, action: string, goal: string) => void;
+  }
+}
+
+// Фиксирует показ gate-лестницы в Яндекс.Метрике (цель gate_view).
+export function GateViewTracker() {
+  useEffect(() => {
+    const c = Number(process.env.NEXT_PUBLIC_METRIKA_COUNTER_ID);
+    if (c && typeof window !== "undefined" && typeof window.ym === "function") {
+      window.ym(c, "reachGoal", "gate_view");
+    }
+  }, []);
+  return null;
+}

src/components/student/homework-section.tsx

@@ -3,6 +3,7 @@
 import { useState, useTransition } from "react";
 import { submitHomework } from "@/lib/actions/student-actions";
 import { AudioRecorder } from "@/components/curator/audio-recorder";
+import { linkify } from "@/lib/linkify";
 
 interface HWFile { name: string; url: string; size: number }
 
@@ -21,6 +22,7 @@ interface Submission {
   files: HWFile[];
   audioUrl?: string | null;
   submittedAt: Date;
+  status: string;
   feedbacks: Feedback[];
 }
 
@@ -47,6 +49,9 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
   const [editing, setEditing] = useState(!submission);
 
   const isReviewed = submission && submission.feedbacks.length > 0;
+  const isApproved = submission?.status === "APPROVED";
+  // Финализировано: есть фидбек ИЛИ ДЗ принято кнопкой без ответа. Нельзя пересдавать.
+  const isLocked = Boolean(isReviewed || isApproved);
 
   const inputStyle = {
     border: "2px solid var(--border)",
@@ -95,7 +100,7 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
           <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 || "—"}
+              {submission!.text ? linkify(submission!.text) : "—"}
             </div>
             {submission!.audioUrl && (
               <div className="px-4 py-2" style={{ border: "1px solid var(--border)" }}>
@@ -114,7 +119,7 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
                     {fb.curator.name} · {new Date(fb.createdAt).toLocaleDateString("ru-RU")}
                   </span>
                 </div>
-                <p className="text-sm whitespace-pre-wrap">{fb.text}</p>
+                <p className="text-sm whitespace-pre-wrap">{linkify(fb.text)}</p>
                 {fbFiles.length > 0 && (
                   <div className="space-y-1">
                     {fbFiles.map((f) => (
@@ -138,8 +143,45 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
         </div>
       )}
 
+      {/* Принято без письменного ответа */}
+      {isApproved && !isReviewed && submission && (
+        <div className="space-y-3">
+          <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(--foreground)", background: "var(--accent)" }}>
+              ДЗ принято ✓
+            </span>
+            <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+              Сдано {new Date(submission.submittedAt).toLocaleDateString("ru-RU")}
+            </span>
+          </div>
+          {submission.text && (
+            <div className="px-4 py-3 text-sm whitespace-pre-wrap opacity-70" style={{ border: "2px solid var(--border)" }}>
+              {linkify(submission.text)}
+            </div>
+          )}
+          {submission.audioUrl && (
+            <div className="px-4 py-2" style={{ border: "1px solid var(--border)" }}>
+              <p className="text-xs mb-1" style={{ color: "var(--muted-foreground)" }}>Аудио-ответ:</p>
+              <audio controls src={submission.audioUrl} style={{ height: 32, width: "100%" }} />
+            </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>
+      )}
+
       {/* Submitted, pending review */}
-      {submission && !isReviewed && !editing && (
+      {submission && !isLocked && !editing && (
         <div className="space-y-3">
           <div className="flex items-center justify-between">
             <div className="flex items-center gap-2">
@@ -156,7 +198,7 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
           </div>
           {submission.text && (
             <div className="px-4 py-3 text-sm whitespace-pre-wrap" style={{ border: "2px solid var(--border)" }}>
-              {submission.text}
+              {linkify(submission.text)}
             </div>
           )}
           {submission.audioUrl && (
@@ -182,7 +224,7 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
       )}
 
       {/* Form */}
-      {editing && !isReviewed && (
+      {editing && !isLocked && (
         <div className="space-y-3">
           <textarea
             value={text}

src/components/student/store-checkout-modal.tsx

@@ -0,0 +1,372 @@
+"use client";
+
+import { useEffect, useId, useRef, useState, type CSSProperties } from "react";
+import {
+  PAY_METHODS_URL,
+  PAY_ORDER_URL,
+  type StoreCatalogEntry,
+} from "@/lib/store-catalog";
+
+export interface LockedCourse {
+  id: string;
+  slug: string;
+  title: string;
+  description: string | null;
+  coverImage: string | null;
+}
+
+interface PayMethod {
+  id: string;
+  label: string;
+  provider: string;
+  kind: "online" | "manual";
+}
+
+interface Props {
+  course: LockedCourse;
+  entry: StoreCatalogEntry;
+  buyer: { name: string; email: string };
+  onClose: () => void;
+}
+
+function formatRub(v: number) {
+  return `${v.toLocaleString("ru-RU")} ₽`;
+}
+
+const inputStyle: CSSProperties = {
+  width: "100%",
+  border: "2px solid var(--border)",
+  background: "var(--background)",
+  color: "var(--foreground)",
+  padding: "0.5rem 0.6rem",
+  fontSize: "14px",
+  fontFamily: "inherit",
+  outline: "none",
+};
+
+export function StoreCheckoutModal({ course, entry, buyer, onClose }: Props) {
+  const [selectedSku, setSelectedSku] = useState(entry.tariffs[0].sku);
+  const [methods, setMethods] = useState<PayMethod[] | null>(null);
+  const [method, setMethod] = useState("robokassa");
+  const [otherOpen, setOtherOpen] = useState(false);
+  const [submitting, setSubmitting] = useState(false);
+  const dialogRef = useRef<HTMLDivElement>(null);
+  const titleId = useId();
+
+  const multiTariff = entry.tariffs.length > 1;
+  const currentMethod = methods?.find((m) => m.id === method);
+
+  // Payment methods dropdown, same source as the landings. On any failure the
+  // hidden method=robokassa keeps the checkout fully functional.
+  useEffect(() => {
+    fetch(PAY_METHODS_URL, { signal: AbortSignal.timeout(5000) })
+      .then((r) => (r.ok ? r.json() : Promise.reject(new Error("bad status"))))
+      .then((data: { methods?: PayMethod[] }) => {
+        const ms = data?.methods ?? [];
+        if (ms.length >= 2) {
+          setMethods(ms);
+          setMethod((cur) => (cur === "robokassa" ? ms[0].id : cur));
+        }
+      })
+      .catch(() => {});
+  }, []);
+
+  // Close on Escape
+  useEffect(() => {
+    const handler = (e: KeyboardEvent) => {
+      if (e.key === "Escape") onClose();
+    };
+    window.addEventListener("keydown", handler);
+    return () => window.removeEventListener("keydown", handler);
+  }, [onClose]);
+
+  // Lock body scroll while the modal is open
+  useEffect(() => {
+    const prev = document.body.style.overflow;
+    document.body.style.overflow = "hidden";
+    return () => {
+      document.body.style.overflow = prev;
+    };
+  }, []);
+
+  // Focus the dialog on open, restore focus on close
+  useEffect(() => {
+    const prev = document.activeElement as HTMLElement | null;
+    dialogRef.current?.focus();
+    return () => prev?.focus();
+  }, []);
+
+  // Coming back from the payment page via bfcache must not leave the
+  // submit button stuck in the "submitting" state.
+  useEffect(() => {
+    const onPageShow = (e: PageTransitionEvent) => {
+      if (e.persisted) setSubmitting(false);
+    };
+    window.addEventListener("pageshow", onPageShow);
+    return () => window.removeEventListener("pageshow", onPageShow);
+  }, []);
+
+  // Minimal focus trap: keep Tab cycling inside the dialog
+  function handleKeyDown(e: React.KeyboardEvent) {
+    if (e.key !== "Tab" || !dialogRef.current) return;
+    const focusables = dialogRef.current.querySelectorAll<HTMLElement>(
+      'button, [href], input, select, [tabindex]:not([tabindex="-1"])'
+    );
+    if (focusables.length === 0) return;
+    const first = focusables[0];
+    const last = focusables[focusables.length - 1];
+    if (e.shiftKey && document.activeElement === first) {
+      e.preventDefault();
+      last.focus();
+    } else if (!e.shiftKey && document.activeElement === last) {
+      e.preventDefault();
+      first.focus();
+    }
+  }
+
+  const labelClass = "block text-xs font-bold uppercase tracking-widest mb-1.5";
+  const primary = methods?.[0];
+  const rest = methods?.slice(1) ?? [];
+
+  return (
+    <div
+      className="fixed inset-0 z-50 flex items-center justify-center px-4"
+      style={{ background: "rgba(50,50,50,0.45)" }}
+      onClick={(e) => {
+        if (e.target === e.currentTarget) onClose();
+      }}
+    >
+      <div
+        ref={dialogRef}
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby={titleId}
+        tabIndex={-1}
+        onKeyDown={handleKeyDown}
+        className="w-full max-w-md max-h-[90dvh] overflow-y-auto p-6 space-y-4"
+        style={{
+          background: "var(--background)",
+          border: "2px solid var(--foreground)",
+          boxShadow: "6px 6px 0 0 var(--foreground)",
+        }}
+      >
+        {/* Header */}
+        <div className="flex items-start justify-between gap-2">
+          <p
+            className="text-xs font-bold uppercase tracking-widest"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            Покупка курса
+          </p>
+          <button
+            type="button"
+            onClick={onClose}
+            aria-label="Закрыть"
+            className="-mt-3 -mr-3 flex h-11 w-11 items-center justify-center"
+            style={{ color: "var(--muted-foreground)", fontSize: "22px", lineHeight: 1 }}
+          >
+            ×
+          </button>
+        </div>
+
+        <div className="flex items-start gap-3">
+          {course.coverImage ? (
+            // eslint-disable-next-line @next/next/no-img-element
+            <img
+              src={course.coverImage}
+              alt=""
+              className="w-24 aspect-video object-cover flex-shrink-0"
+              style={{ border: "2px solid var(--border)" }}
+            />
+          ) : (
+            <div
+              className="w-24 aspect-video flex items-center justify-center text-xl flex-shrink-0"
+              style={{ backgroundColor: "var(--color-surface)", border: "2px solid var(--border)" }}
+            >
+              📚
+            </div>
+          )}
+          <h2 id={titleId} className="font-bold text-lg leading-tight">
+            {course.title}
+          </h2>
+        </div>
+
+        {course.description && (
+          <p className="text-sm line-clamp-4" style={{ color: "var(--muted-foreground)" }}>
+            {course.description}
+          </p>
+        )}
+
+        <form method="POST" action={PAY_ORDER_URL} onSubmit={() => setSubmitting(true)}>
+          <input type="hidden" name="name" value={buyer.name} />
+          <input type="hidden" name="email" value={buyer.email} />
+          <input type="hidden" name="method" value={method} />
+          {!multiTariff && <input type="hidden" name="sku" value={entry.tariffs[0].sku} />}
+
+          {/* Tariff */}
+          <div className="mb-4">
+            <span className={labelClass} style={{ color: "var(--muted-foreground)" }}>
+              Тариф
+            </span>
+            {multiTariff ? (
+              <div className="space-y-2">
+                {entry.tariffs.map((t) => (
+                  <label
+                    key={t.sku}
+                    className="flex items-start gap-3 p-3 cursor-pointer min-h-[44px]"
+                    style={{
+                      border:
+                        "2px solid " +
+                        (selectedSku === t.sku ? "var(--foreground)" : "var(--border)"),
+                      background: selectedSku === t.sku ? "var(--accent)" : "transparent",
+                    }}
+                  >
+                    <input
+                      type="radio"
+                      name="sku"
+                      value={t.sku}
+                      checked={selectedSku === t.sku}
+                      onChange={() => setSelectedSku(t.sku)}
+                      className="mt-1"
+                      style={{ accentColor: "var(--foreground)" }}
+                    />
+                    <span className="flex-1">
+                      <span className="flex items-baseline justify-between gap-2">
+                        <span className="text-sm font-bold">{t.label}</span>
+                        <span className="text-sm font-bold whitespace-nowrap">
+                          {formatRub(t.priceRub)}
+                        </span>
+                      </span>
+                      {t.includes && (
+                        <span
+                          className="block text-xs mt-0.5"
+                          style={{ color: "var(--muted-foreground)" }}
+                        >
+                          {t.includes}
+                        </span>
+                      )}
+                    </span>
+                  </label>
+                ))}
+              </div>
+            ) : (
+              <p className="font-bold text-lg">{formatRub(entry.tariffs[0].priceRub)}</p>
+            )}
+          </div>
+
+          {/* Payment method — rendered only when the list actually loaded */}
+          {methods && primary && rest.length > 0 && (
+            <div className="mb-4">
+              <span className={labelClass} style={{ color: "var(--muted-foreground)" }}>
+                Способ оплаты
+              </span>
+              <div className="space-y-2">
+                <label className="flex items-center gap-3 p-2 cursor-pointer min-h-[44px]">
+                  <input
+                    type="radio"
+                    name="method_ui"
+                    checked={!otherOpen}
+                    onChange={() => {
+                      setOtherOpen(false);
+                      setMethod(primary.id);
+                    }}
+                    style={{ accentColor: "var(--foreground)" }}
+                  />
+                  <span className="text-sm">
+                    <span className="font-bold">{primary.label}</span>{" "}
+                    <span style={{ color: "var(--muted-foreground)" }}>{primary.provider}</span>
+                  </span>
+                </label>
+                <label className="flex items-center gap-3 p-2 cursor-pointer min-h-[44px]">
+                  <input
+                    type="radio"
+                    name="method_ui"
+                    checked={otherOpen}
+                    onChange={() => {
+                      setOtherOpen(true);
+                      setMethod(rest[0].id);
+                    }}
+                    style={{ accentColor: "var(--foreground)" }}
+                  />
+                  <span className="text-sm">Другой способ</span>
+                </label>
+                {otherOpen && (
+                  <select
+                    value={method}
+                    onChange={(e) => setMethod(e.target.value)}
+                    aria-label="Другой способ оплаты"
+                    style={inputStyle}
+                    onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+                    onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+                  >
+                    {rest.map((m) => (
+                      <option key={m.id} value={m.id}>
+                        {m.label} — {m.provider}
+                      </option>
+                    ))}
+                  </select>
+                )}
+                {currentMethod?.kind === "manual" && (
+                  <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+                    Счёт выставим вручную — доступ откроется после подтверждения оплаты.
+                  </p>
+                )}
+              </div>
+            </div>
+          )}
+
+          {/* Promo code */}
+          <div className="mb-4">
+            <label
+              className={labelClass}
+              style={{ color: "var(--muted-foreground)" }}
+              htmlFor={`${titleId}-promo`}
+            >
+              Промокод
+            </label>
+            <input
+              id={`${titleId}-promo`}
+              type="text"
+              name="promo_code"
+              maxLength={40}
+              autoComplete="off"
+              placeholder="Если есть"
+              style={inputStyle}
+              onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+              onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+            />
+          </div>
+
+          <p className="text-xs mb-3" style={{ color: "var(--muted-foreground)" }}>
+            Доступ придёт на <span className="font-bold">{buyer.email}</span>
+          </p>
+
+          <button
+            type="submit"
+            disabled={submitting}
+            className="btn-aubade btn-aubade-accent w-full min-h-[44px] text-sm"
+          >
+            {submitting ? "Переходим к оплате…" : "Перейти к оплате →"}
+          </button>
+        </form>
+
+        {/* Footer */}
+        <div className="space-y-2 pt-1">
+          <a
+            href={entry.landingUrl}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="text-sm underline inline-block"
+            style={{ color: "var(--foreground)" }}
+          >
+            Подробнее о курсе на сайте →
+          </a>
+          <p className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+            Сумма на странице оплаты отобразится в тенге (₸). Доступ откроется автоматически
+            после оплаты.
+          </p>
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/student/store-showcase.tsx

@@ -0,0 +1,124 @@
+"use client";
+
+import { useState } from "react";
+import { STORE_CATALOG } from "@/lib/store-catalog";
+import { StoreCheckoutModal, type LockedCourse } from "./store-checkout-modal";
+
+interface Props {
+  courses: LockedCourse[];
+  buyer: { name: string; email: string };
+}
+
+// Blurred card body shared by both the modal-trigger button and the
+// fallback landing link.
+function CardBody({ course }: { course: LockedCourse }) {
+  return (
+    <>
+      {/* Overlay: замок + призыв, поверх размытого контента */}
+      <div
+        className="absolute inset-0 z-10 flex flex-col items-center justify-center gap-2 transition-opacity"
+        style={{ backgroundColor: "color-mix(in srgb, var(--background) 55%, transparent)" }}
+      >
+        <span className="text-2xl">🔒</span>
+        <span
+          className="text-sm font-bold px-4 py-2"
+          style={{
+            border: "2px solid var(--foreground)",
+            backgroundColor: "var(--accent)",
+            color: "var(--foreground)",
+          }}
+        >
+          Подробнее →
+        </span>
+      </div>
+      {/* Размытый контент карточки */}
+      <div
+        className="flex flex-col flex-1"
+        style={{ filter: "blur(1.8px)", opacity: 0.82, pointerEvents: "none" }}
+      >
+        {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-lg leading-tight">{course.title}</h2>
+          {course.description && (
+            <p className="text-sm line-clamp-3" style={{ color: "var(--muted-foreground)" }}>
+              {course.description}
+            </p>
+          )}
+        </div>
+      </div>
+    </>
+  );
+}
+
+export function StoreShowcase({ courses, buyer }: Props) {
+  const [selectedSlug, setSelectedSlug] = useState<string | null>(null);
+
+  const selected = courses.find((c) => c.slug === selectedSlug);
+  const selectedEntry = selected ? STORE_CATALOG[selected.slug] : undefined;
+
+  const cardClass = "card-aubade p-0 overflow-hidden flex flex-col relative group";
+
+  return (
+    <div className="mt-10">
+      <p
+        className="text-xs font-bold uppercase tracking-widest mb-3"
+        style={{ color: "var(--muted-foreground)" }}
+      >
+        Другие курсы Second Brain
+      </p>
+      <div className="grid gap-4 sm:grid-cols-2">
+        {courses.map((course) => {
+          const entry = STORE_CATALOG[course.slug];
+          if (!entry || entry.tariffs.length === 0) {
+            // Fallback: no catalog entry → keep the old landing link
+            return (
+              <a
+                key={course.id}
+                href={entry?.landingUrl ?? "https://second-brain.ru"}
+                target="_blank"
+                rel="noopener noreferrer"
+                className={cardClass}
+              >
+                <CardBody course={course} />
+              </a>
+            );
+          }
+          return (
+            <button
+              key={course.id}
+              type="button"
+              aria-haspopup="dialog"
+              onClick={() => setSelectedSlug(course.slug)}
+              className={`${cardClass} text-left w-full cursor-pointer`}
+            >
+              <CardBody course={course} />
+            </button>
+          );
+        })}
+      </div>
+
+      {selected && selectedEntry && (
+        <StoreCheckoutModal
+          course={selected}
+          entry={selectedEntry}
+          buyer={buyer}
+          onClose={() => setSelectedSlug(null)}
+        />
+      )}
+    </div>
+  );
+}

src/components/student/tripwire-gate-banner.tsx

@@ -0,0 +1,48 @@
+// Gate-лестница после wow-урока (ежедневные заметки). Двойной оффер:
+// основной — трипвайр «Второй мозг для предпринимателя», вторичный — полный курс.
+// Server component, ДС-2 (Aubade).
+
+import { GateViewTracker } from "./gate-view-tracker";
+
+const TRIPWIRE_URL = "https://second-brain.ru/entrepreneur";
+const FULL_COURSE_URL = "https://obsidian.second-brain.ru/";
+
+export function TripwireGateBanner() {
+  return (
+    <div
+      className="card-aubade p-6 mt-10"
+      style={{ background: "var(--accent)", boxShadow: "4px 4px 0 0 var(--foreground)" }}
+    >
+      <GateViewTracker />
+      <p
+        className="text-xs font-bold uppercase tracking-widest mb-2"
+        style={{ color: "var(--muted-foreground)" }}
+      >
+        Ты освоил главную привычку
+      </p>
+      <h2 className="font-bold text-xl mb-2">🎯 Что дальше?</h2>
+      <p className="text-sm mb-4" style={{ color: "var(--foreground)" }}>
+        Ежедневные заметки — это фундамент второго мозга. Дальше система начинает
+        работать на тебя. Выбери свой следующий шаг:
+      </p>
+      <div className="flex flex-col sm:flex-row gap-3">
+        <a
+          href={TRIPWIRE_URL}
+          target="_blank"
+          rel="noopener noreferrer"
+          className="btn-aubade btn-aubade-accent text-sm flex-1 text-center font-bold"
+        >
+          ⚡ Второй мозг для предпринимателя →
+        </a>
+        <a
+          href={FULL_COURSE_URL}
+          target="_blank"
+          rel="noopener noreferrer"
+          className="btn-aubade text-sm flex-1 text-center"
+        >
+          🏛 Полный курс «Obsidian» →
+        </a>
+      </div>
+    </div>
+  );
+}

src/components/tools/CodeOutput.tsx

@@ -0,0 +1,21 @@
+import { CopyButton } from "./CopyButton";
+import type { ToolId } from "@/lib/tools/_shared/types";
+
+export function CodeOutput({ code, tool, label }: { code: string; tool: ToolId; label?: string }) {
+  return (
+    <div className="flex flex-col gap-2">
+      {label && <div className="text-xs font-bold tracking-wide" style={{ color: "var(--muted-foreground)" }}>{label}</div>}
+      <pre
+        className="overflow-auto p-3 text-sm"
+        style={{
+          fontFamily: "var(--font-mono, 'Fira Mono', monospace)",
+          border: "1px solid var(--border)",
+          borderRadius: "2px",
+          backgroundColor: "var(--background)",
+          color: "var(--foreground)",
+        }}
+      >{code}</pre>
+      <div><CopyButton text={code} tool={tool} /></div>
+    </div>
+  );
+}

src/components/tools/CopyButton.tsx

@@ -0,0 +1,25 @@
+"use client";
+import { useState } from "react";
+import { Copy, Check } from "lucide-react";
+import { logToolUsage } from "@/lib/actions/tool-usage";
+import type { ToolId } from "@/lib/tools/_shared/types";
+
+export function CopyButton({ text, tool }: { text: string; tool: ToolId }) {
+  const [copied, setCopied] = useState(false);
+  async function onCopy() {
+    try {
+      await navigator.clipboard.writeText(text);
+    } catch {
+      return; // буфер недоступен (нет разрешения / insecure context) — молча
+    }
+    setCopied(true);
+    logToolUsage({ tool }).catch(() => {}); // аналитика — best-effort, не роняем UI
+    setTimeout(() => setCopied(false), 1500);
+  }
+  return (
+    <button type="button" onClick={onCopy} className="btn-aubade btn-aubade-accent inline-flex items-center gap-2 text-sm">
+      {copied ? <Check size={16} /> : <Copy size={16} />}
+      {copied ? "Скопировано" : "Скопировать"}
+    </button>
+  );
+}

src/components/tools/ToolCard.tsx

@@ -0,0 +1,27 @@
+import Link from "next/link";
+import { MessageSquareQuote, FileCode2, Palette, SlidersHorizontal, Table2, Database, FileText, Wrench, type LucideIcon } from "lucide-react";
+import type { ToolMeta } from "@/lib/tools/_shared/types";
+
+// Явная карта (не `import * as Icons`) — иначе весь набор lucide попадает в бандл.
+const ICONS: Record<string, LucideIcon> = {
+  MessageSquareQuote,
+  FileCode2,
+  Palette,
+  SlidersHorizontal,
+  Table2,
+  Database,
+  FileText,
+};
+
+export function ToolCard({ tool }: { tool: ToolMeta }) {
+  const Icon = ICONS[tool.icon] ?? Wrench;
+  return (
+    <Link href={`/tools/${tool.id}`} className="card-aubade p-4 flex flex-col gap-2 no-underline">
+      <div className="flex items-center gap-2" style={{ color: "var(--foreground)" }}>
+        <Icon size={20} />
+        <span className="font-bold">{tool.title}</span>
+      </div>
+      <p className="text-sm" style={{ color: "var(--muted-foreground)" }}>{tool.description}</p>
+    </Link>
+  );
+}

src/components/tools/ToolboxPromoCard.tsx

@@ -0,0 +1,26 @@
+import Link from "next/link";
+import { Wrench } from "lucide-react";
+
+// Промо-карточка Toolbox для раздела «Мои курсы» — точка входа в /tools.
+export function ToolboxPromoCard() {
+  return (
+    <Link
+      href="/tools"
+      className="card-aubade p-5 flex items-center gap-4 no-underline"
+      style={{ background: "var(--accent)" }}
+    >
+      <Wrench size={28} style={{ color: "var(--foreground)", flexShrink: 0 }} />
+      <div className="flex-1">
+        <h2 className="font-bold text-lg leading-tight" style={{ color: "var(--foreground)" }}>
+          Инструменты Obsidian
+        </h2>
+        <p className="text-sm" style={{ color: "var(--foreground)" }}>
+          Генераторы синтаксиса: callout, frontmatter, темы, Style Settings, Dataview, Bases.
+        </p>
+      </div>
+      <span className="text-sm font-bold whitespace-nowrap" style={{ color: "var(--foreground)" }}>
+        Открыть →
+      </span>
+    </Link>
+  );
+}

src/components/welcome/scheme-connectors.tsx

@@ -0,0 +1,56 @@
+"use client";
+
+import { useEffect, useRef } from "react";
+
+// Draws 2px rays from the edge of every [data-scheme-card] to the central
+// [data-scheme-logo] circle. Redraws on container resize and after fonts load.
+export function SchemeConnectors() {
+  const ref = useRef<SVGSVGElement>(null);
+
+  useEffect(() => {
+    const svg = ref.current;
+    const scheme = svg?.parentElement;
+    if (!svg || !scheme) return;
+
+    function draw() {
+      if (!svg || !scheme) return;
+      const logo = scheme.querySelector<HTMLElement>("[data-scheme-logo]");
+      if (!logo) return;
+      const s = scheme.getBoundingClientRect();
+      const l = logo.getBoundingClientRect();
+      const cx = l.left + l.width / 2 - s.left;
+      const cy = l.top + l.height / 2 - s.top;
+      const r = l.width / 2 + 4;
+      svg.setAttribute("viewBox", `0 0 ${s.width} ${s.height}`);
+      let lines = "";
+      scheme.querySelectorAll<HTMLElement>("[data-scheme-card]").forEach((card) => {
+        const c = card.getBoundingClientRect();
+        const isLeft = card.dataset.schemeCard === "left";
+        const x1 = (isLeft ? c.right : c.left) - s.left;
+        const y1 = c.top + c.height / 2 - s.top;
+        const dx = cx - x1;
+        const dy = cy - y1;
+        const d = Math.hypot(dx, dy) || 1;
+        const x2 = cx - (dx / d) * r;
+        const y2 = cy - (dy / d) * r;
+        lines += `<line x1="${x1}" y1="${y1}" x2="${x2}" y2="${y2}" />`;
+      });
+      svg.innerHTML = lines;
+    }
+
+    draw();
+    const ro = new ResizeObserver(draw);
+    ro.observe(scheme);
+    document.fonts?.ready.then(draw).catch(() => {});
+    return () => ro.disconnect();
+  }, []);
+
+  return (
+    <svg
+      ref={ref}
+      aria-hidden="true"
+      className="hidden md:block absolute inset-0 w-full h-full pointer-events-none"
+      style={{ stroke: "var(--border)", strokeWidth: 2 }}
+    />
+  );
+}

src/components/welcome/welcome-page.tsx

@@ -0,0 +1,195 @@
+// Public landing shown on "/" for unauthenticated visitors.
+// DS-2 rework of the old platform's "second brain" infographic.
+import Link from "next/link";
+import {
+  StickyNote,
+  BookOpen,
+  Lightbulb,
+  Database,
+  GraduationCap,
+  Wrench,
+  type LucideIcon,
+} from "lucide-react";
+import { SchemeConnectors } from "./scheme-connectors";
+
+interface SchemeBlock {
+  icon: LucideIcon;
+  title: string;
+  items: string[];
+}
+
+const BLOCKS_LEFT: SchemeBlock[] = [
+  {
+    icon: StickyNote,
+    title: "Заметки",
+    items: [
+      "разбираемся, как создавать качественные заметки, а не просто писать всё подряд",
+      "изучаем самые эффективные подходы в заметкоделии и заметковедении",
+    ],
+  },
+  {
+    icon: BookOpen,
+    title: "Знания",
+    items: [
+      "превращаем сырые данные и разрозненную информацию в устойчивые знания, готовые к повторному применению",
+    ],
+  },
+  {
+    icon: Lightbulb,
+    title: "Идеи",
+    items: [
+      "фиксируем, развиваем и воплощаем гениальные идеи в жизнь",
+      "и не даём им сгинуть в процессе",
+    ],
+  },
+];
+
+const BLOCKS_RIGHT: SchemeBlock[] = [
+  {
+    icon: Database,
+    title: "Базы знаний",
+    items: [
+      "создаём картотеку, строим структуру, наполняем её качественными заметками",
+      "связываем отдельные элементы в единую сеть идей и размышлений",
+    ],
+  },
+  {
+    icon: GraduationCap,
+    title: "Обучение",
+    items: [
+      "учимся правильно учиться, осваиваем эффективные стратегии",
+      "выстраиваем свой индивидуальный трек развития",
+    ],
+  },
+  {
+    icon: Wrench,
+    title: "Инструменты",
+    items: [
+      "разбираемся с особенностями инструментов и выбираем самые подходящие",
+    ],
+  },
+];
+
+const ROW_START = ["md:row-start-1", "md:row-start-2", "md:row-start-3"];
+
+function SchemeCard({ block, side, row }: { block: SchemeBlock; side: "left" | "right"; row: number }) {
+  const Icon = block.icon;
+  const colClass = side === "left" ? "md:col-start-1" : "md:col-start-3";
+  return (
+    <div
+      data-scheme-card={side}
+      className={`card-aubade relative z-[1] p-5 ${colClass} ${ROW_START[row]}`}
+    >
+      <div className="flex items-center gap-3 mb-3">
+        <span
+          className="inline-flex items-center justify-center w-10 h-10 flex-shrink-0"
+          style={{ backgroundColor: "var(--accent)", border: "2px solid var(--foreground)" }}
+        >
+          <Icon size={22} style={{ color: "var(--foreground)" }} />
+        </span>
+        <span className="font-bold uppercase" style={{ fontSize: "16px", letterSpacing: "0.08em" }}>
+          {block.title}
+        </span>
+      </div>
+      <ul className="space-y-2">
+        {block.items.map((item) => (
+          <li
+            key={item}
+            className="relative pl-4 leading-normal"
+            style={{ fontSize: "14.5px" }}
+          >
+            <span className="absolute left-0" style={{ color: "var(--muted-foreground)" }}>
+              •
+            </span>
+            {item}
+          </li>
+        ))}
+      </ul>
+    </div>
+  );
+}
+
+export function WelcomePage() {
+  return (
+    <div className="min-h-screen flex flex-col">
+      <header
+        className="flex flex-wrap items-center justify-between gap-3 px-4 sm:px-8 py-3.5"
+        style={{ borderBottom: "2px solid var(--border)" }}
+      >
+        <span className="font-bold text-lg whitespace-nowrap">Second Brain</span>
+        <nav className="flex gap-3">
+          <Link href="/login" className="btn-aubade text-sm whitespace-nowrap">
+            Войти
+          </Link>
+          <Link href="/register" className="btn-aubade btn-aubade-accent text-sm whitespace-nowrap">
+            Зарегистрироваться
+          </Link>
+        </nav>
+      </header>
+
+      <main className="flex-1 w-full max-w-[1240px] mx-auto px-4 sm:px-8 pt-10 md:pt-14 pb-16">
+        <p
+          className="text-center text-xs font-bold uppercase mb-3.5"
+          style={{ color: "var(--muted-foreground)", letterSpacing: "0.18em" }}
+        >
+          Образовательная платформа Second Brain
+        </p>
+        <h1 className="text-center font-bold leading-tight text-[26px] md:text-[40px] mb-2.5">
+          Создаём и развиваем
+          <br />
+          второй мозг
+        </h1>
+        <p
+          className="text-center mb-8 md:mb-14"
+          style={{ color: "var(--muted-foreground)", fontSize: "17px" }}
+        >
+          Заметки, знания и идеи — в одной системе, которая работает на вас
+        </p>
+
+        <div className="relative grid grid-cols-1 md:grid-cols-[1fr_320px_1fr] gap-y-5 md:gap-y-7 gap-x-11 items-center">
+          <SchemeConnectors />
+          <div className="md:col-start-2 md:row-start-1 md:row-span-3 flex flex-col items-center gap-4 mb-4 md:mb-0">
+            {/* eslint-disable-next-line @next/next/no-img-element */}
+            <img
+              src="/logo.svg"
+              alt="Second Brain"
+              data-scheme-logo
+              className="w-[150px] h-[150px] md:w-[280px] md:h-[280px]"
+            />
+            <span
+              className="text-xs font-bold uppercase"
+              style={{ color: "var(--muted-foreground)", letterSpacing: "0.18em" }}
+            >
+              Second Brain
+            </span>
+          </div>
+          {BLOCKS_LEFT.map((block, i) => (
+            <SchemeCard key={block.title} block={block} side="left" row={i} />
+          ))}
+          {BLOCKS_RIGHT.map((block, i) => (
+            <SchemeCard key={block.title} block={block} side="right" row={i} />
+          ))}
+        </div>
+
+        <div className="flex flex-col sm:flex-row justify-center gap-4 mt-10 md:mt-14">
+          <Link href="/register" className="btn-aubade btn-aubade-accent px-6 py-2.5">
+            Начать учиться →
+          </Link>
+          <Link href="/login" className="btn-aubade px-6 py-2.5">
+            У меня уже есть доступ
+          </Link>
+        </div>
+      </main>
+
+      <footer
+        className="flex flex-col sm:flex-row justify-between gap-1.5 px-4 sm:px-8 py-4 text-sm"
+        style={{ borderTop: "2px solid var(--border)", color: "var(--muted-foreground)" }}
+      >
+        <span>ИП Second Brain Production</span>
+        <a href="https://second-brain.ru" className="underline" style={{ color: "var(--muted-foreground)" }}>
+          second-brain.ru — все курсы и материалы
+        </a>
+      </footer>
+    </div>
+  );
+}

src/lib/actions/pdf-key-actions.ts

@@ -0,0 +1,13 @@
+"use server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { hasPaidAccess } from "@/lib/clean-pdf/access";
+import { regenerateKey } from "@/lib/clean-pdf/keys";
+
+export async function regeneratePdfApiKey(): Promise<{ ok: boolean; key?: string }> {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) return { ok: false };
+  if (!(await hasPaidAccess(session.user.id))) return { ok: false };
+  const key = await regenerateKey(session.user.id);
+  return { ok: true, key };
+}

src/lib/actions/student-actions.ts

@@ -4,7 +4,7 @@ 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";
+import { sendHomeworkSubmittedEmail, sendCommentNotificationEmail } from "@/lib/email";
 import { getSettings, parseNotificationEmails, asBool } from "@/lib/settings";
 
 // ── Lesson Progress ───────────────────────────────────────────────────────────
@@ -56,7 +56,7 @@ export async function submitHomework(
     include: { feedbacks: true },
   });
 
-  if (existing?.feedbacks && existing.feedbacks.length > 0) {
+  if ((existing?.feedbacks && existing.feedbacks.length > 0) || existing?.status === "APPROVED") {
     throw new Error("Работа уже проверена");
   }
 
@@ -156,7 +156,7 @@ export async function addComment(lessonId: string, slug: string, text: string, p
 
   const lesson = await prisma.lesson.findUnique({
     where: { id: lessonId },
-    select: { module: { select: { course: { select: { id: true } } } } },
+    select: { title: true, module: { select: { course: { select: { id: true, slug: true } } } } },
   });
   if (!lesson) throw new Error("Lesson not found");
 
@@ -185,6 +185,26 @@ export async function addComment(lessonId: string, slug: string, text: string, p
     data: { lessonId, userId: session.user.id, text: trimmed, ...(parentId ? { parentId } : {}) },
   });
 
+  // Уведомление админам/кураторам о новом комментарии студента (не о своих ответах)
+  if (!isAdmin && !isCurator) {
+    const settings = await getSettings();
+    if (asBool(settings.notifyOnComment)) {
+      const configured = parseNotificationEmails(settings.notificationEmails);
+      const recipients = configured.length > 0
+        ? configured.map((email) => ({ email, name: "" }))
+        : await prisma.user.findMany({
+            where: { role: { in: ["admin", "curator"] } },
+            select: { email: true, name: true },
+          });
+      const lessonUrl = `${process.env.BETTER_AUTH_URL ?? "https://school.second-brain.ru"}/courses/${slug}/lessons/${lessonId}`;
+      await Promise.all(
+        recipients.map((r) =>
+          sendCommentNotificationEmail(r.email, r.name, session.user.name, lesson.title, trimmed, lessonUrl)
+        )
+      );
+    }
+  }
+
   revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
 }
 

src/lib/actions/tool-usage.ts

@@ -0,0 +1,25 @@
+"use server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { TOOL_IDS, type ToolId } from "@/lib/tools/_shared/types";
+
+// Дедуп-окно: один (userId, tool) пишем раз в N минут — чистит аналитику и
+// снимает storage-abuse (Server Action — публичный RPC, не покрыт Better Auth rateLimit).
+const DEDUP_WINDOW_MS = 10 * 60 * 1000;
+
+export async function logToolUsage({ tool }: { tool: ToolId }): Promise<{ ok: boolean }> {
+  // auth-first: сессия раньше валидации ввода
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) return { ok: false };
+  if (!TOOL_IDS.includes(tool)) return { ok: false };
+
+  const recent = await prisma.toolUsage.findFirst({
+    where: { userId: session.user.id, tool, createdAt: { gte: new Date(Date.now() - DEDUP_WINDOW_MS) } },
+    select: { id: true },
+  });
+  if (recent) return { ok: true };
+
+  await prisma.toolUsage.create({ data: { userId: session.user.id, tool } });
+  return { ok: true };
+}

src/lib/auth.ts

@@ -71,6 +71,11 @@ export const auth = betterAuth({
         defaultValue: "student",
         input: false,
       },
+      archetype: {
+        type: "string",
+        required: false,
+        input: false,
+      },
     },
   },
 });

src/lib/clean-pdf/__tests__/access.test.ts

@@ -0,0 +1,43 @@
+import { describe, expect, it } from "vitest";
+import { decidePaidAccess, monthStartUtc } from "@/lib/clean-pdf/access";
+
+const now = new Date("2026-07-06T10:00:00Z");
+const freeSlug = "obsidian-start";
+
+describe("decidePaidAccess", () => {
+  it("платный enrollment без срока — да", () => {
+    expect(decidePaidAccess({ role: "student", banned: false, freeSlug, now,
+      enrollments: [{ courseSlug: "zotero", expiresAt: null }] })).toBe(true);
+  });
+
+  it("только бесплатный курс — нет", () => {
+    expect(decidePaidAccess({ role: "student", banned: false, freeSlug, now,
+      enrollments: [{ courseSlug: "obsidian-start", expiresAt: null }] })).toBe(false);
+  });
+
+  it("без enrollments — нет", () => {
+    expect(decidePaidAccess({ role: "student", banned: false, freeSlug, now, enrollments: [] })).toBe(false);
+  });
+
+  it("истёкший платный — нет, живой срок — да", () => {
+    expect(decidePaidAccess({ role: "student", banned: false, freeSlug, now,
+      enrollments: [{ courseSlug: "zotero", expiresAt: new Date("2026-01-01") }] })).toBe(false);
+    expect(decidePaidAccess({ role: "student", banned: false, freeSlug, now,
+      enrollments: [{ courseSlug: "zotero", expiresAt: new Date("2027-01-01") }] })).toBe(true);
+  });
+
+  it("admin и curator — да даже без курсов", () => {
+    expect(decidePaidAccess({ role: "admin", banned: false, freeSlug, now, enrollments: [] })).toBe(true);
+    expect(decidePaidAccess({ role: "curator", banned: false, freeSlug, now, enrollments: [] })).toBe(true);
+  });
+
+  it("бан всё перекрывает", () => {
+    expect(decidePaidAccess({ role: "admin", banned: true, freeSlug, now, enrollments: [] })).toBe(false);
+  });
+});
+
+describe("monthStartUtc", () => {
+  it("возвращает первое число месяца 00:00 UTC", () => {
+    expect(monthStartUtc(new Date("2026-07-06T23:59:59Z")).toISOString()).toBe("2026-07-01T00:00:00.000Z");
+  });
+});

src/lib/clean-pdf/__tests__/api-key.test.ts

@@ -0,0 +1,15 @@
+import { describe, expect, it } from "vitest";
+import { PDF_KEY_PREFIX, generatePdfKey } from "@/lib/clean-pdf/api-key";
+
+describe("generatePdfKey", () => {
+  it("формат sbpdf_<base64url>, достаточная длина", () => {
+    const key = generatePdfKey();
+    expect(key.startsWith(PDF_KEY_PREFIX)).toBe(true);
+    expect(key.length).toBeGreaterThanOrEqual(PDF_KEY_PREFIX.length + 32);
+    expect(key.slice(PDF_KEY_PREFIX.length)).toMatch(/^[A-Za-z0-9_-]+$/);
+  });
+
+  it("две генерации различаются", () => {
+    expect(generatePdfKey()).not.toBe(generatePdfKey());
+  });
+});

src/lib/clean-pdf/__tests__/generate.int.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from "vitest";
+import { generateCleanPdf } from "@/lib/clean-pdf/generate";
+
+const enabled = process.env.RUN_PDF_INTEGRATION === "1";
+
+describe.runIf(enabled)("generateCleanPdf (integration, нужен browserless)", () => {
+  it("генерирует PDF реальной статьи", async () => {
+    const { pdf, title } = await generateCleanPdf({
+      url: "https://habr.com/ru/articles/942236/",
+      format: "A4",
+      theme: "light",
+    });
+    expect(pdf.length).toBeGreaterThan(20_000);
+    expect(pdf.subarray(0, 5).toString()).toBe("%PDF-");
+    expect(title.length).toBeGreaterThan(3);
+  }, 120_000);
+});

src/lib/clean-pdf/__tests__/ssrf.test.ts

@@ -0,0 +1,70 @@
+import { describe, expect, it } from "vitest";
+import { BlockedUrlError, assertPublicUrl, isPrivateAddress } from "@/lib/clean-pdf/ssrf";
+
+describe("isPrivateAddress", () => {
+  const privateIps = [
+    "127.0.0.1", "0.0.0.0", "10.1.2.3", "100.64.0.1", "169.254.169.254",
+    "172.16.0.1", "172.31.255.255", "192.168.1.1", "192.0.0.8", "198.18.0.1",
+    "224.0.0.1", "255.255.255.255",
+    "::1", "::", "fc00::1", "fd12:3456::1", "fe80::1", "::ffff:10.0.0.1", "::ffff:127.0.0.1",
+    "::ffff:7f00:1", "::ffff:a00:1", "::ffff:c0a8:101", "::ffff:a9fe:a9fe",
+  ];
+  const publicIps = ["93.184.216.34", "8.8.8.8", "172.32.0.1", "2606:2800:220:1::1", "::ffff:8.8.8.8", "::ffff:808:808"];
+
+  it.each(privateIps)("блокирует %s", (ip) => expect(isPrivateAddress(ip)).toBe(true));
+  it.each(publicIps)("пропускает %s", (ip) => expect(isPrivateAddress(ip)).toBe(false));
+});
+
+describe("assertPublicUrl", () => {
+  const publicResolve = async () => [{ address: "93.184.216.34", family: 4 }];
+  const privateResolve = async () => [{ address: "172.18.0.2", family: 4 }];
+  const mixedResolve = async () => [
+    { address: "93.184.216.34", family: 4 },
+    { address: "10.0.0.5", family: 4 },
+  ];
+
+  it("пропускает публичный https-URL", async () => {
+    const url = await assertPublicUrl("https://example.com/article", publicResolve);
+    expect(url.hostname).toBe("example.com");
+  });
+
+  it.each([
+    "file:///etc/passwd",
+    "ftp://example.com/x",
+    "chrome://settings",
+    "not a url",
+  ])("блокирует %s", async (raw) => {
+    await expect(assertPublicUrl(raw, publicResolve)).rejects.toThrow(BlockedUrlError);
+  });
+
+  it("блокирует localhost и .local без резолва", async () => {
+    await expect(assertPublicUrl("http://localhost:3000/x", publicResolve)).rejects.toThrow(BlockedUrlError);
+    await expect(assertPublicUrl("http://printer.local/x", publicResolve)).rejects.toThrow(BlockedUrlError);
+  });
+
+  it("блокирует литеральный приватный IP", async () => {
+    await expect(assertPublicUrl("http://192.168.1.1/admin", publicResolve)).rejects.toThrow(BlockedUrlError);
+    await expect(assertPublicUrl("http://[::1]:8080/", publicResolve)).rejects.toThrow(BlockedUrlError);
+  });
+
+  it("блокирует хост, резолвящийся в приватный IP (включая частично)", async () => {
+    await expect(assertPublicUrl("https://evil.example/x", privateResolve)).rejects.toThrow(BlockedUrlError);
+    await expect(assertPublicUrl("https://evil.example/x", mixedResolve)).rejects.toThrow(BlockedUrlError);
+  });
+
+  it("блокирует хост, который не резолвится", async () => {
+    const failResolve = async () => { throw new Error("ENOTFOUND"); };
+    await expect(assertPublicUrl("https://nope.example/x", failResolve)).rejects.toThrow(BlockedUrlError);
+  });
+
+  it("блокирует v4-mapped IPv6 в bracket-нотации (SSRF-обход)", async () => {
+    for (const raw of [
+      "http://[::ffff:127.0.0.1]/",
+      "http://[::ffff:10.0.0.1]/",
+      "http://[::ffff:169.254.169.254]/",
+      "http://[::ffff:192.168.1.1]/",
+    ]) {
+      await expect(assertPublicUrl(raw, publicResolve)).rejects.toThrow(BlockedUrlError);
+    }
+  });
+});

src/lib/clean-pdf/__tests__/template.test.ts

@@ -0,0 +1,59 @@
+import { describe, expect, it } from "vitest";
+import { buildCleanHtml, safePdfFilename } from "@/lib/clean-pdf/template";
+
+const base = {
+  title: "Заголовок статьи",
+  url: "https://example.com/article",
+  theme: "light" as const,
+};
+
+describe("buildCleanHtml", () => {
+  it("экранирует HTML в метаполях", () => {
+    const html = buildCleanHtml({ ...base, title: `<script>alert(1)</script>`, contentHtml: "<p>ок</p>" });
+    expect(html).not.toContain("<script>alert(1)</script>");
+    expect(html).toContain("&lt;script&gt;");
+  });
+
+  it("вставляет контент и шапку", () => {
+    const html = buildCleanHtml({ ...base, author: "Автор", site: "Example", contentHtml: "<p>Текст статьи</p>" });
+    expect(html).toContain("<p>Текст статьи</p>");
+    expect(html).toContain("Заголовок статьи");
+    expect(html).toContain("Автор");
+    expect(html).toContain("https://example.com/article");
+  });
+
+  it("строит оглавление при 3+ заголовках и проставляет якоря", () => {
+    const content = "<h2>Один</h2><p>a</p><h2>Два</h2><p>b</p><h3>Три</h3><p>c</p>";
+    const html = buildCleanHtml({ ...base, contentHtml: content });
+    expect(html).toContain("Содержание");
+    expect(html).toMatch(/<h2 id="[^"]+">Один<\/h2>/);
+    expect((html.match(/class="toc-item/g) ?? []).length).toBe(3);
+  });
+
+  it("не строит оглавление при <3 заголовках", () => {
+    const html = buildCleanHtml({ ...base, contentHtml: "<h2>Один</h2><p>a</p>" });
+    expect(html).not.toContain("Содержание");
+  });
+
+  it("уникализирует одинаковые якоря", () => {
+    const content = "<h2>Раздел</h2><h2>Раздел</h2><h2>Раздел</h2>";
+    const html = buildCleanHtml({ ...base, contentHtml: content });
+    const ids = [...html.matchAll(/<h2 id="([^"]+)"/g)].map((m) => m[1]);
+    expect(new Set(ids).size).toBe(3);
+  });
+
+  it("переключает тёмную тему", () => {
+    const light = buildCleanHtml({ ...base, contentHtml: "<p>x</p>" });
+    const dark = buildCleanHtml({ ...base, theme: "dark", contentHtml: "<p>x</p>" });
+    expect(light).toContain('data-theme="light"');
+    expect(dark).toContain('data-theme="dark"');
+  });
+});
+
+describe("safePdfFilename", () => {
+  it("убирает опасные символы и ограничивает длину", () => {
+    expect(safePdfFilename('Статья: как/не\\надо "делать"?')).toBe("Статья_ как_не_надо _делать_");
+    expect(safePdfFilename("")).toBe("document");
+    expect(safePdfFilename("a".repeat(300)).length).toBeLessThanOrEqual(140);
+  });
+});

src/lib/clean-pdf/__tests__/zotero-script.test.ts

@@ -0,0 +1,12 @@
+import { describe, expect, it } from "vitest";
+import { buildZoteroScript } from "@/lib/clean-pdf/zotero-script";
+
+describe("buildZoteroScript", () => {
+  it("подставляет ключ и адрес школы", () => {
+    const s = buildZoteroScript({ apiKey: "sbpdf_test123", baseUrl: "https://school.second-brain.ru" });
+    expect(s).toContain("'sbpdf_test123'");
+    expect(s).toContain("'https://school.second-brain.ru'");
+    expect(s).toContain("/api/pdf?url=");
+    expect(s).not.toContain("YOUR_KEY");
+  });
+});

src/lib/clean-pdf/access.ts

@@ -0,0 +1,60 @@
+import { prisma } from "@/lib/prisma";
+
+// НЕ "clean-pdf": так CopyButton логирует копирования — они не должны тратить лимит
+export const PDF_TOOL_ID = "clean-pdf-generate";
+export const BURST_LIMIT = 5; // успешных генераций в минуту
+const BURST_WINDOW_MS = 60_000;
+
+export function decidePaidAccess(input: {
+  role: string;
+  banned: boolean;
+  enrollments: { courseSlug: string; expiresAt: Date | null }[];
+  freeSlug: string;
+  now?: Date;
+}): boolean {
+  const now = input.now ?? new Date();
+  if (input.banned) return false;
+  if (input.role === "admin" || input.role === "curator") return true;
+  return input.enrollments.some(
+    (e) => e.courseSlug !== input.freeSlug && (e.expiresAt === null || e.expiresAt > now),
+  );
+}
+
+export async function hasPaidAccess(userId: string): Promise<boolean> {
+  const user = await prisma.user.findUnique({
+    where: { id: userId },
+    select: {
+      role: true,
+      banned: true,
+      enrollments: { select: { expiresAt: true, course: { select: { slug: true } } } },
+    },
+  });
+  if (!user) return false;
+  return decidePaidAccess({
+    role: user.role,
+    banned: user.banned ?? false,
+    freeSlug: process.env.FREE_COURSE_SLUG ?? "obsidian-start",
+    enrollments: user.enrollments.map((e) => ({ courseSlug: e.course.slug, expiresAt: e.expiresAt })),
+  });
+}
+
+export function monthStartUtc(now: Date): Date {
+  return new Date(Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), 1));
+}
+
+export function getMonthlyLimit(): number {
+  const n = Number(process.env.PDF_MONTHLY_LIMIT);
+  return Number.isFinite(n) && n > 0 ? n : 100;
+}
+
+export async function getMonthlyUsage(userId: string): Promise<number> {
+  return prisma.toolUsage.count({
+    where: { userId, tool: PDF_TOOL_ID, createdAt: { gte: monthStartUtc(new Date()) } },
+  });
+}
+
+export async function getBurstUsage(userId: string): Promise<number> {
+  return prisma.toolUsage.count({
+    where: { userId, tool: PDF_TOOL_ID, createdAt: { gte: new Date(Date.now() - BURST_WINDOW_MS) } },
+  });
+}

src/lib/clean-pdf/api-key.ts

@@ -0,0 +1,7 @@
+import { randomBytes } from "node:crypto";
+
+export const PDF_KEY_PREFIX = "sbpdf_";
+
+export function generatePdfKey(): string {
+  return PDF_KEY_PREFIX + randomBytes(24).toString("base64url");
+}

src/lib/clean-pdf/generate.ts

@@ -0,0 +1,139 @@
+import { isIP } from "node:net";
+import { chromium } from "playwright-core";
+import { JSDOM } from "jsdom";
+import { Defuddle } from "defuddle/node";
+import { assertPublicUrl, isPrivateAddress } from "@/lib/clean-pdf/ssrf";
+import { buildCleanHtml } from "@/lib/clean-pdf/template";
+
+export class EmptyContentError extends Error {}
+export class RenderError extends Error {}
+
+/**
+ * Оборачивает промис в app-level таймаут: если `p` не завершится за `ms`,
+ * гонка завершится отказом с RenderError, и внешний `finally` (browser.close())
+ * освободит слот browserless вместо того, чтобы держать его до зависшего вызова.
+ */
+function withTimeout<T>(p: Promise<T>, ms: number, message: string): Promise<T> {
+  let timer: ReturnType<typeof setTimeout>;
+  const guard = new Promise<never>((_, reject) => {
+    timer = setTimeout(() => reject(new RenderError(message)), ms);
+    timer.unref?.();
+  });
+  return Promise.race([p, guard]).finally(() => clearTimeout(timer)) as Promise<T>;
+}
+
+const GOTO_TIMEOUT_MS = 30_000;
+const SETTLE_TIMEOUT_MS = 10_000;
+const PDF_TIMEOUT_MS = 30_000;
+const UA =
+  "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0 Safari/537.36";
+
+function browserWsUrl(): string {
+  const base = process.env.BROWSER_WS_URL;
+  if (!base) throw new RenderError("BROWSER_WS_URL не задан");
+  const token = process.env.BROWSERLESS_TOKEN;
+  return token ? `${base}${base.includes("?") ? "&" : "?"}token=${token}` : base;
+}
+
+export async function generateCleanPdf(opts: {
+  url: string;
+  format: "A4" | "Letter";
+  theme: "light" | "dark";
+}): Promise<{ pdf: Buffer; title: string }> {
+  const target = await assertPublicUrl(opts.url);
+
+  const browser = await chromium.connectOverCDP(browserWsUrl()).catch((e) => {
+    throw new RenderError(`Браузер недоступен: ${e.message}`);
+  });
+
+  try {
+    const context = await browser.newContext({ userAgent: UA, viewport: { width: 1280, height: 800 } });
+    // Вторая линия SSRF-обороны: страница не может дёргать приватные адреса
+    // (литеральные IP и localhost; hostnames уже проверены до goto).
+    await context.route("**/*", (route) => {
+      try {
+        const u = new URL(route.request().url());
+        const host = u.hostname.replace(/^\[|\]$/g, "").replace(/\.$/, "");
+        if (
+          (u.protocol !== "http:" && u.protocol !== "https:") ||
+          host === "localhost" || host.endsWith(".local") || host.endsWith(".internal") ||
+          (isIP(host) !== 0 && isPrivateAddress(host))
+        ) {
+          return route.abort();
+        }
+      } catch {
+        return route.abort();
+      }
+      return route.continue();
+    });
+
+    // context.route НЕ перехватывает WebSocket — отдельная защита от SSRF через ws://
+    await context.routeWebSocket("**/*", (ws) => {
+      try {
+        const u = new URL(ws.url());
+        const host = u.hostname.replace(/^\[|\]$/g, "").replace(/\.$/, "");
+        if (
+          (u.protocol !== "ws:" && u.protocol !== "wss:") ||
+          host === "localhost" || host.endsWith(".local") || host.endsWith(".internal") ||
+          (isIP(host) !== 0 && isPrivateAddress(host))
+        ) {
+          ws.close();
+          return;
+        }
+      } catch {
+        ws.close();
+        return;
+      }
+      ws.connectToServer();
+    });
+
+    const page = await context.newPage();
+    await page.goto(target.href, { waitUntil: "domcontentloaded", timeout: GOTO_TIMEOUT_MS }).catch((e) => {
+      throw new RenderError(`Страница не открылась: ${e.message}`);
+    });
+    await page.waitForLoadState("networkidle", { timeout: SETTLE_TIMEOUT_MS }).catch(() => {});
+
+    const rawHtml = await page.content();
+    const pageTitle = await page.title().catch(() => "");
+
+    const dom = new JSDOM(rawHtml, { url: target.href });
+    const article = await Defuddle(dom.window.document, target.href);
+    // DefuddleResponse (node_modules/defuddle/dist/types.d.ts) типизирует
+    // content/title/author/site/domain/wordCount как обязательные (не optional) поля —
+    // сам объект тоже не nullable (Defuddle() не возвращает null/undefined).
+    // Отсутствие контента выражается пустой строкой/нулевым wordCount, не отсутствием поля.
+    if (!article.content || article.wordCount < 10) {
+      throw new EmptyContentError("Не удалось выделить содержимое страницы");
+    }
+
+    const title = article.title || pageTitle || target.hostname;
+    const cleanHtml = buildCleanHtml({
+      title,
+      author: article.author || undefined,
+      site: article.site || article.domain || undefined,
+      url: target.href,
+      contentHtml: article.content,
+      theme: opts.theme,
+    });
+
+    const pdfPage = await context.newPage();
+    await pdfPage.setContent(cleanHtml, { waitUntil: "networkidle", timeout: SETTLE_TIMEOUT_MS }).catch(() => {});
+    // page.pdf() в playwright-core не принимает опцию timeout (проверено по
+    // node_modules/playwright-core/types/types.d.ts) и не имеет implicit-бага —
+    // оборачиваем в app-level withTimeout, чтобы зависание всё же дошло до
+    // finally (browser.close()) и не держало CONCURRENT-слот browserless.
+    const pdf = await withTimeout(
+      pdfPage.pdf({
+        format: opts.format,
+        printBackground: true,
+        margin: { top: "15mm", bottom: "18mm", left: "15mm", right: "15mm" },
+      }),
+      PDF_TIMEOUT_MS,
+      "Печать PDF не завершилась вовремя",
+    );
+
+    return { pdf, title };
+  } finally {
+    await browser.close().catch(() => {});
+  }
+}

src/lib/clean-pdf/keys.ts

@@ -0,0 +1,23 @@
+import { prisma } from "@/lib/prisma";
+import { generatePdfKey } from "@/lib/clean-pdf/api-key";
+
+export async function getOrCreatePdfKey(userId: string): Promise<string> {
+  const existing = await prisma.pdfApiKey.findUnique({ where: { userId } });
+  if (existing) return existing.key;
+  const created = await prisma.pdfApiKey.upsert({
+    where: { userId },
+    create: { userId, key: generatePdfKey() },
+    update: {},
+  });
+  return created.key;
+}
+
+export async function regenerateKey(userId: string): Promise<string> {
+  const key = generatePdfKey();
+  await prisma.pdfApiKey.upsert({
+    where: { userId },
+    create: { userId, key },
+    update: { key },
+  });
+  return key;
+}

src/lib/clean-pdf/ssrf.ts

@@ -0,0 +1,119 @@
+import { lookup } from "node:dns/promises";
+import { isIP } from "node:net";
+
+export class BlockedUrlError extends Error {}
+
+export type LookupFn = (
+  hostname: string,
+  opts: { all: true },
+) => Promise<{ address: string; family: number }[]>;
+
+function v4ToInt(ip: string): number {
+  return ip.split(".").reduce((acc, o) => acc * 256 + Number(o), 0);
+}
+
+// [начало включительно, конец включительно] в виде 32-битных чисел
+const V4_PRIVATE: Array<[number, number]> = [
+  ["0.0.0.0", "0.255.255.255"],       // "this network"
+  ["10.0.0.0", "10.255.255.255"],     // RFC1918
+  ["100.64.0.0", "100.127.255.255"],  // CGNAT
+  ["127.0.0.0", "127.255.255.255"],   // loopback
+  ["169.254.0.0", "169.254.255.255"], // link-local / cloud metadata
+  ["172.16.0.0", "172.31.255.255"],   // RFC1918 (docker-сети попадают сюда)
+  ["192.0.0.0", "192.0.0.255"],       // IETF protocol assignments
+  ["192.168.0.0", "192.168.255.255"], // RFC1918
+  ["198.18.0.0", "198.19.255.255"],   // benchmarking
+  ["224.0.0.0", "255.255.255.255"],   // multicast + reserved + broadcast
+].map(([a, b]) => [v4ToInt(a), v4ToInt(b)] as [number, number]);
+
+function isPrivateV4(ip: string): boolean {
+  const n = v4ToInt(ip);
+  return V4_PRIVATE.some(([lo, hi]) => n >= lo && n <= hi);
+}
+
+/** Разворачивает IPv6 (в т.ч. сжатый `::` и v4-mapped/embedded dotted) в 8 групп по 16 бит. */
+function expandV6(ip: string): number[] | null {
+  let s = ip.toLowerCase();
+
+  // Встроенный dotted-хвост (::ffff:127.0.0.1, ::127.0.0.1) → в hex-группы
+  const dotted = s.match(/(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/);
+  if (dotted) {
+    if (isIP(dotted[1]) !== 4) return null;
+    const n = v4ToInt(dotted[1]);
+    s = s.slice(0, dotted.index) + ((n >>> 16) & 0xffff).toString(16) + ":" + (n & 0xffff).toString(16);
+  }
+
+  const halves = s.split("::");
+  if (halves.length > 2) return null;
+  const head = halves[0] ? halves[0].split(":") : [];
+  const tail = halves.length === 2 ? (halves[1] ? halves[1].split(":") : []) : [];
+
+  let groups: string[];
+  if (halves.length === 2) {
+    const missing = 8 - head.length - tail.length;
+    if (missing < 0) return null;
+    groups = [...head, ...Array(missing).fill("0"), ...tail];
+  } else {
+    groups = head;
+  }
+  if (groups.length !== 8) return null;
+
+  const nums = groups.map((g) => (g === "" ? 0 : parseInt(g, 16)));
+  if (nums.some((x) => Number.isNaN(x) || x < 0 || x > 0xffff)) return null;
+  return nums;
+}
+
+export function isPrivateAddress(ip: string): boolean {
+  if (isIP(ip) === 4) return isPrivateV4(ip);
+  if (isIP(ip) !== 6) return true; // не IP — не пропускаем
+
+  const groups = expandV6(ip);
+  if (!groups) return true; // не смогли разобрать v6 — не пропускаем
+
+  // ::/96 (v4-compatible, вкл. :: и ::1) и ::ffff:0:0/96 (v4-mapped):
+  // младшие 32 бита содержат IPv4 — проверяем его напрямую.
+  const firstFiveZero = groups.slice(0, 5).every((g) => g === 0);
+  if (firstFiveZero && (groups[5] === 0 || groups[5] === 0xffff)) {
+    const v4num = groups[6] * 0x10000 + groups[7];
+    const dottedV4 = `${(v4num >>> 24) & 255}.${(v4num >>> 16) & 255}.${(v4num >>> 8) & 255}.${v4num & 255}`;
+    return isPrivateV4(dottedV4);
+  }
+
+  const first = groups[0];
+  if (first >= 0xfc00 && first <= 0xfdff) return true; // fc00::/7 (ULA)
+  if (first >= 0xfe80 && first <= 0xfebf) return true; // fe80::/10 (link-local)
+  return false;
+}
+
+export async function assertPublicUrl(raw: string, resolve: LookupFn = lookup): Promise<URL> {
+  let url: URL;
+  try {
+    url = new URL(raw);
+  } catch {
+    throw new BlockedUrlError("Некорректный URL");
+  }
+  if (url.protocol !== "http:" && url.protocol !== "https:") {
+    throw new BlockedUrlError("Поддерживаются только http и https");
+  }
+
+  const hostname = url.hostname.replace(/^\[|\]$/g, "").replace(/\.$/, ""); // [::1] → ::1
+  if (hostname === "localhost" || hostname.endsWith(".local") || hostname.endsWith(".internal")) {
+    throw new BlockedUrlError("Адрес недоступен");
+  }
+
+  if (isIP(hostname)) {
+    if (isPrivateAddress(hostname)) throw new BlockedUrlError("Адрес недоступен");
+    return url;
+  }
+
+  let addresses: { address: string; family: number }[];
+  try {
+    addresses = await resolve(hostname, { all: true });
+  } catch {
+    throw new BlockedUrlError("Не удалось определить адрес сайта");
+  }
+  if (addresses.length === 0 || addresses.some((a) => isPrivateAddress(a.address))) {
+    throw new BlockedUrlError("Адрес недоступен");
+  }
+  return url;
+}

src/lib/clean-pdf/template.ts

@@ -0,0 +1,107 @@
+import { JSDOM } from "jsdom";
+
+export interface CleanArticle {
+  title: string;
+  author?: string;
+  site?: string;
+  url: string;
+  contentHtml: string;
+  theme: "light" | "dark";
+}
+
+function escapeHtml(s: string): string {
+  return s
+    .replace(/&/g, "&")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;");
+}
+
+export function safePdfFilename(title: string): string {
+  const cleaned = title.replace(/[\\/:"*?<>|\n\r]+/g, "_").trim().slice(0, 140);
+  return cleaned || "document";
+}
+
+interface TocEntry { id: string; text: string; level: 2 | 3 }
+
+/** Проставляет id заголовкам h2/h3 и возвращает контент + записи оглавления. */
+function prepareContent(contentHtml: string): { html: string; toc: TocEntry[] } {
+  const dom = new JSDOM(`<body>${contentHtml}</body>`);
+  const doc = dom.window.document;
+  const used = new Set<string>();
+  const toc: TocEntry[] = [];
+
+  doc.querySelectorAll("h2, h3").forEach((h) => {
+    const text = (h.textContent ?? "").trim();
+    if (!text) return;
+    let id = text.toLowerCase().replace(/[^\p{L}\p{N}]+/gu, "-").replace(/^-+|-+$/g, "") || "section";
+    let i = 2;
+    while (used.has(id)) id = `${id}-${i++}`;
+    used.add(id);
+    h.id = id;
+    toc.push({ id, text, level: h.tagName === "H2" ? 2 : 3 });
+  });
+
+  return { html: doc.body.innerHTML, toc };
+}
+
+const CSS = `
+  :root[data-theme="light"] { --bg: #faf7f0; --fg: #1f1d1a; --muted: #6b6459; --line: #d8d2c4; --accent: #7a2e2e; }
+  :root[data-theme="dark"]  { --bg: #201e1b; --fg: #e8e4dc; --muted: #a39b8d; --line: #3d3a34; --accent: #d4a0a0; }
+  * { box-sizing: border-box; }
+  body { background: var(--bg); color: var(--fg); font-family: Georgia, "Times New Roman", serif;
+         font-size: 12.5pt; line-height: 1.65; margin: 0; }
+  main { max-width: 100%; }
+  h1 { font-size: 22pt; line-height: 1.25; margin: 0 0 6pt; }
+  h2 { font-size: 16pt; margin: 20pt 0 8pt; }
+  h3 { font-size: 13.5pt; margin: 16pt 0 6pt; }
+  p { margin: 0 0 9pt; }
+  a { color: var(--accent); text-decoration: none; }
+  img, video, iframe { max-width: 100%; height: auto; }
+  pre { background: rgba(127,127,127,.08); border: 1px solid var(--line); padding: 8pt;
+        overflow-x: hidden; white-space: pre-wrap; word-wrap: break-word;
+        font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 9.5pt; }
+  code { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 0.9em; }
+  blockquote { border-left: 3px solid var(--line); margin: 0 0 9pt; padding: 2pt 0 2pt 12pt; color: var(--muted); }
+  table { border-collapse: collapse; width: 100%; font-size: 10.5pt; }
+  th, td { border: 1px solid var(--line); padding: 4pt 6pt; text-align: left; }
+  figure { margin: 0 0 9pt; } figcaption { color: var(--muted); font-size: 9.5pt; }
+  .meta { color: var(--muted); font-size: 10pt; margin-bottom: 4pt; }
+  .meta a { color: var(--muted); }
+  .head-rule { border: 0; border-top: 1px solid var(--line); margin: 12pt 0 16pt; }
+  .toc { border: 1px solid var(--line); padding: 10pt 14pt; margin: 0 0 16pt; }
+  .toc-title { font-weight: bold; margin-bottom: 6pt; }
+  .toc-item { display: block; margin: 2pt 0; }
+  .toc-item.lvl3 { padding-left: 14pt; font-size: 0.92em; }
+  h2, h3 { break-after: avoid; } pre, blockquote, figure, table { break-inside: avoid; }
+`;
+
+export function buildCleanHtml(article: CleanArticle): string {
+  const { html, toc } = prepareContent(article.contentHtml);
+  const metaParts = [article.site, article.author].filter(Boolean).map((s) => escapeHtml(s!));
+
+  const tocHtml = toc.length >= 3
+    ? `<nav class="toc"><div class="toc-title">Содержание</div>${toc
+        .map((t) => `<a class="toc-item lvl${t.level}" href="#${t.id}">${escapeHtml(t.text)}</a>`)
+        .join("")}</nav>`
+    : "";
+
+  return `<!DOCTYPE html>
+<html lang="ru" data-theme="${article.theme}">
+<head>
+<meta charset="utf-8">
+<title>${escapeHtml(article.title)}</title>
+<style>${CSS}</style>
+</head>
+<body>
+<main>
+  <h1>${escapeHtml(article.title)}</h1>
+  ${metaParts.length ? `<div class="meta">${metaParts.join(" · ")}</div>` : ""}
+  <div class="meta"><a href="${escapeHtml(article.url)}">${escapeHtml(article.url)}</a></div>
+  <hr class="head-rule">
+  ${tocHtml}
+  ${html}
+</main>
+</body>
+</html>`;
+}

src/lib/clean-pdf/zotero-script.ts

@@ -0,0 +1,80 @@
+// Адаптация скрипта Clean PDF (pdf.brainysnipe.ru/zotero-script.js) под школу.
+export function buildZoteroScript({ apiKey, baseUrl }: { apiKey: string; baseUrl: string }): string {
+  return `// ── Настройки ──────────────────────────────────────────────────────────────
+const API_KEY     = '${apiKey}'; // персональный ключ из school.second-brain.ru/tools/clean-pdf
+const SERVICE_URL = '${baseUrl}';
+const FORMAT      = 'A4';    // 'A4' или 'Letter'
+const THEME       = 'light'; // 'light' или 'dark'
+// ───────────────────────────────────────────────────────────────────────────
+
+if (typeof item === "undefined" || !item) return;
+(async function () {
+  let tempFilePath = null;
+  try {
+    function joinPath(dir, filename) {
+      if (typeof OS !== "undefined" && OS.Path && OS.Path.join) return OS.Path.join(dir, filename);
+      const separator = dir.includes("\\\\") ? "\\\\" : "/";
+      return dir.replace(/[\\\\/]+$/, "") + separator + filename;
+    }
+
+    let targetItem = item;
+    if (!targetItem.isRegularItem()) {
+      if (targetItem.isAttachment() || targetItem.isNote())
+        targetItem = Zotero.Items.get(targetItem.parentID);
+    }
+    if (!targetItem?.isRegularItem()) {
+      Zotero.alert(null, "Чистый PDF", "Выберите обычную запись Zotero.");
+      return;
+    }
+    const url = targetItem.getField("url");
+    if (!url) { Zotero.alert(null, "Чистый PDF", "У записи нет URL."); return; }
+
+    const pw = new Zotero.ProgressWindow();
+    pw.changeHeadline("Чистый PDF");
+    const progress = new pw.ItemProgress(targetItem.getImageSrc(), targetItem.getField("title"));
+    pw.show();
+    pw.addDescription("Генерируем PDF…");
+
+    const response = await Zotero.getMainWindow().fetch(
+      SERVICE_URL + "/api/pdf?url=" + encodeURIComponent(url) + "&format=" + FORMAT + "&theme=" + THEME,
+      { headers: { 'Authorization': 'Bearer ' + API_KEY } }
+    );
+    if (!response.ok) {
+      const body = await response.json().catch(() => ({}));
+      progress.setError();
+      pw.addDescription("Ошибка: " + (body.error || ("HTTP " + response.status)));
+      pw.startCloseTimer(8000);
+      return;
+    }
+
+    const uint8Array = new Uint8Array(await (await response.blob()).arrayBuffer());
+    if (uint8Array.length < 1000) {
+      progress.setError(); pw.addDescription("Пришёл пустой PDF."); pw.startCloseTimer(8000); return;
+    }
+
+    const safeTitle = (targetItem.getField("title") || "Document").replace(/[\\\\/:"*?<>|]+/g, "_").slice(0, 140);
+    tempFilePath = joinPath(Zotero.getTempDirectory().path, safeTitle + ".pdf");
+    await Zotero.getMainWindow().IOUtils.write(tempFilePath, uint8Array);
+    await Zotero.Attachments.importFromFile({ file: tempFilePath, parentItemID: targetItem.id, contentType: "application/pdf" });
+
+    for (const attId of targetItem.getAttachments()) {
+      const att = Zotero.Items.get(attId);
+      const ct = att?.attachmentContentType || "";
+      if (ct === "text/html" || ct === "application/zip") await att.eraseTx();
+    }
+
+    progress.setProgress(100);
+    const usesCount = response.headers.get('X-Uses-Count');
+    const maxUses   = response.headers.get('X-Max-Uses');
+    const usageInfo = (usesCount && maxUses) ? (" (" + usesCount + "/" + maxUses + " за месяц)") : "";
+    pw.addDescription("PDF прикреплён." + usageInfo);
+    pw.startCloseTimer(4000);
+  } catch (e) {
+    Zotero.alert(null, "Ошибка", e.toString());
+  } finally {
+    if (tempFilePath) {
+      await Zotero.getMainWindow().IOUtils.remove(tempFilePath, { ignoreAbsent: true }).catch(() => {});
+    }
+  }
+})();`;
+}

src/lib/email.ts

@@ -137,6 +137,31 @@ export async function sendHomeworkSubmittedEmail(
   }).catch((e) => console.error("[email] sendHomeworkSubmittedEmail:", e));
 }
 
+export async function sendCommentNotificationEmail(
+  to: string,
+  recipientName: string,
+  studentName: string,
+  lessonTitle: string,
+  commentText: string,
+  lessonUrl: string
+) {
+  const school = await getSchoolName();
+  const esc = (t: string) => t.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+  const preview = commentText.length > 400 ? commentText.slice(0, 400) + "…" : commentText;
+  await getResend().emails.send({
+    from: FROM,
+    to,
+    subject: `Новый комментарий под уроком — ${lessonTitle}`,
+    html: base(`
+      <p ${p}>Привет${recipientName ? `, ${esc(recipientName)}` : ""}!</p>
+      <p ${p}><strong>${esc(studentName)}</strong> оставил комментарий под уроком <strong>«${lessonTitle}»</strong>:</p>
+      ${quote(esc(preview))}
+      <p ${pLast}>Открыть урок и ответить:</p>
+      ${btn(lessonUrl, "Открыть урок")}
+    `, school),
+  }).catch((e) => console.error("[email] sendCommentNotificationEmail:", e));
+}
+
 export async function sendFeedbackReceivedEmail(
   to: string,
   studentName: string,

src/lib/s3.ts

@@ -19,6 +19,21 @@ export function getPublicUrl(key: string): string {
   return `${process.env.S3_ENDPOINT}/${BUCKET}/${key}`;
 }
 
+/**
+ * Валидна ли публичная ссылка на наш загруженный файл. Принимает И CDN-домен
+ * (`S3_CDN_URL`, напр. files.second-brain.ru), И прямой S3-эндпоинт — иначе
+ * после включения CDN ссылки от uploadFile (getPublicUrl) перестают проходить
+ * валидацию (вложения молча отбрасываются). Нужна, чтобы клиент не подсунул
+ * произвольный URL — только наши бакет/CDN.
+ */
+export function isAllowedPublicUrl(url: string): boolean {
+  if (typeof url !== "string" || !url.startsWith("https://")) return false;
+  const prefixes: string[] = [];
+  if (process.env.S3_CDN_URL) prefixes.push(`${process.env.S3_CDN_URL}/`);
+  if (process.env.S3_ENDPOINT) prefixes.push(`${process.env.S3_ENDPOINT}/${BUCKET}/`);
+  return prefixes.some((p) => url.startsWith(p));
+}
+
 /**
  * Заголовок Content-Disposition для принудительного скачивания с человеческим
  * именем. RFC 5987: ASCII-фолбэк + UTF-8 (кириллица percent-encoded).

src/lib/settings.ts

@@ -14,6 +14,7 @@ export const SETTINGS_DEFAULTS = {
   // Notifications
   notificationEmails: "", // newline-separated list
   notifyOnHomework: "true",
+  notifyOnComment: "true",
   notifyOnRegistration: "true",
   notifyStudentOnFeedback: "true",
 

src/lib/store-catalog.ts

@@ -0,0 +1,87 @@
+// Storefront catalog for the dashboard upsell modal.
+//
+// SKUs and prices DUPLICATE payment-router/products.yaml (and the landing
+// pages) — the server always charges the catalog price by SKU, so a stale
+// price here is a display bug, not a money bug. When a price changes:
+// products.yaml → landing → this file.
+
+export interface StoreTariff {
+  sku: string; // must match payment-router/products.yaml
+  label: string;
+  priceRub: number; // display only; the charge is resolved server-side
+  includes?: string; // short "what's inside" caption under the label
+}
+
+export interface StoreCatalogEntry {
+  landingUrl: string;
+  tariffs: StoreTariff[];
+}
+
+export const PAY_ORDER_URL = "https://obsidian.second-brain.ru/pay/order";
+export const PAY_METHODS_URL = "https://obsidian.second-brain.ru/pay/methods";
+
+// Keys = course slugs shown as locked cards on the student dashboard.
+// Only tariffs of the course's "native" landing are listed — cross-bundles
+// from other landings would confuse the choice.
+export const STORE_CATALOG: Record<string, StoreCatalogEntry> = {
+  "second-brain-vault": {
+    landingUrl: "https://second-brain.ru/sb-vault",
+    tariffs: [{ sku: "sb-vault", label: "Second Brain Vault", priceRub: 2990 }],
+  },
+  "claude-obsidian": {
+    landingUrl: "https://second-brain.ru/claude-obsidian",
+    tariffs: [{ sku: "claude-obsidian", label: "Claude + Obsidian", priceRub: 4990 }],
+  },
+  "obsidian-full": {
+    landingUrl: "https://obsidian.second-brain.ru/",
+    tariffs: [
+      {
+        sku: "obsidian-pro",
+        label: "Obsidian + AI",
+        priceRub: 14990,
+        includes: "Включает курс «Obsidian + AI» и Second Brain Vault",
+      },
+      {
+        sku: "obsidian-architect",
+        label: "Архитектор знаний",
+        priceRub: 17990,
+        includes: "Плюс курс «Zotero. Всё включено»",
+      },
+    ],
+  },
+  "zotero-full": {
+    landingUrl: "https://zotero.second-brain.ru/",
+    tariffs: [
+      {
+        sku: "zotero-analyst",
+        label: "Аналитик",
+        priceRub: 10990,
+        includes: "Включает курс «Obsidian. Всё включено»",
+      },
+      {
+        sku: "zotero-max",
+        label: "Второй мозг на максималках",
+        priceRub: 17990,
+        includes: "Плюс курс «Obsidian + AI» и Second Brain Vault",
+      },
+    ],
+  },
+  "obsidian-ai": {
+    landingUrl: "https://obsidianai.second-brain.ru/",
+    tariffs: [
+      { sku: "obsidianai-base", label: "База", priceRub: 6990 },
+      {
+        sku: "obsidianai-expert",
+        label: "AI Эксперт",
+        priceRub: 14990,
+        includes: "Включает курс «Obsidian. Всё включено» и Second Brain Vault",
+      },
+      {
+        sku: "obsidianai-researcher",
+        label: "AI Исследователь",
+        priceRub: 17990,
+        includes: "Плюс курс «Zotero. Всё включено»",
+      },
+    ],
+  },
+};

src/lib/tools/__tests__/bases.test.ts

@@ -0,0 +1,58 @@
+import { describe, it, expect } from "vitest";
+import { buildBases } from "@/lib/tools/bases";
+
+const base = {
+  viewType: "table" as const,
+  viewName: "Проекты",
+  properties: ["file.name", "status"],
+  filterScope: "none" as const,
+  filterValue: "",
+};
+
+describe("buildBases", () => {
+  it("базовая таблица: type/name/order", () => {
+    const y = buildBases(base);
+    expect(y).toContain("views:");
+    expect(y).toContain("  - type: table");
+    expect(y).toContain("    name: Проекты");
+    expect(y).toContain("    order:");
+    expect(y).toContain("      - file.name");
+    expect(y).toContain("      - status");
+    expect(y).not.toContain("filters:");
+  });
+
+  it("фильтр по папке", () => {
+    const y = buildBases({ ...base, filterScope: "folder", filterValue: "Projects" });
+    expect(y).toContain("filters:");
+    expect(y).toContain("  and:");
+    expect(y).toContain(`    - 'file.inFolder("Projects")'`);
+  });
+
+  it("фильтр по тегу снимает ведущий #", () => {
+    const y = buildBases({ ...base, filterScope: "tag", filterValue: "#проект" });
+    expect(y).toContain(`- 'file.hasTag("проект")'`);
+  });
+
+  it("property-фильтр — готовое выражение как есть", () => {
+    const y = buildBases({ ...base, filterScope: "property", filterValue: 'status == "done"' });
+    expect(y).toContain(`- 'status == "done"'`);
+  });
+
+  it("сортировка → sort: column/direction (не property)", () => {
+    const y = buildBases({ ...base, sortBy: "status", sortDir: "DESC" });
+    expect(y).toContain("    sort:");
+    expect(y).toContain("      - column: status");
+    expect(y).toContain("        direction: DESC");
+  });
+
+  it("группировка и лимит", () => {
+    const y = buildBases({ ...base, groupBy: "status", limit: 50 });
+    expect(y).toContain("    groupBy:");
+    expect(y).toContain("      property: status");
+    expect(y).toContain("    limit: 50");
+  });
+
+  it("имя вида квотится при двоеточии+пробеле", () => {
+    expect(buildBases({ ...base, viewName: "Книги: всё" })).toContain('name: "Книги: всё"');
+  });
+});