fix: remove binary files

for pdfs only select pages not text

.env.example

@@ -0,0 +1,10 @@
+POSTGRES_DB=postres
+POSTGRES_USER=root
+POSTGRES_PASSWORD=root
+
+DJANGO_SECRET_KEY=changeme
+DJANGO_DEBUG=True
+DB_HOST=localhost
+DB_PORT=5432
+
+VITE_API_URL=http://localhost:8000/api

.github/workflows/backend-ci.yml

@@ -1,72 +0,0 @@
-name: Backend CI
-
-on:
-  push:
-    branches: [main, develop]
-    paths:
-      - "backend/**"
-      - ".github/workflows/backend-ci.yml"
-  pull_request:
-    paths:
-      - "backend/**"
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-
-    services:
-      postgres:
-        image: postgres:16
-        env:
-          POSTGRES_DB: cloud_reader
-          POSTGRES_USER: cloud_reader
-          POSTGRES_PASSWORD: cloud_reader
-        ports:
-          - 5432:5432
-        options: >-
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
-
-    defaults:
-      run:
-        working-directory: backend
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Python 3.12
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.12"
-          cache: "pip"
-          cache-dependency-path: backend/requirements/dev.txt
-
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install -r requirements/dev.txt
-
-      - name: Lint
-        run: ruff check .
-
-      - name: Run migrations
-        run: python manage.py migrate
-        env:
-          DB_HOST: localhost
-          DB_NAME: cloud_reader
-          DB_USER: cloud_reader
-          DB_PASSWORD: cloud_reader
-          DB_PORT: 5432
-          SECRET_KEY: ci-test-secret-key-do-not-use-in-production
-
-      - name: Run tests
-        run: pytest
-        env:
-          DB_HOST: localhost
-          DB_NAME: cloud_reader
-          DB_USER: cloud_reader
-          DB_PASSWORD: cloud_reader
-          DB_PORT: 5432
-          SECRET_KEY: ci-test-secret-key-do-not-use-in-production

.github/workflows/frontend-ci.yml

@@ -1,42 +0,0 @@
-name: Frontend CI
-
-on:
-  push:
-    branches: [main, develop]
-    paths:
-      - "frontend/**"
-      - "shared/**"
-      - ".github/workflows/frontend-ci.yml"
-  pull_request:
-    paths:
-      - "frontend/**"
-      - "shared/**"
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Node.js 20
-        uses: actions/setup-node@v4
-        with:
-          node-version: "20"
-          cache: "yarn"
-          cache-dependency-path: yarn.lock
-
-      - name: Install dependencies
-        run: yarn install --frozen-lockfile
-
-      - name: Type check shared
-        run: yarn workspace @cloud-reader/shared typecheck
-
-      - name: Build shared
-        run: yarn workspace @cloud-reader/shared build
-
-      - name: Type check frontend
-        run: yarn workspace @cloud-reader/frontend typecheck
-
-      - name: Build frontend
-        run: yarn workspace @cloud-reader/frontend build

.github/workflows/mobile-ci.yml

@@ -1,39 +0,0 @@
-name: Mobile CI
-
-on:
-  push:
-    branches: [main, develop]
-    paths:
-      - "mobile/**"
-      - "shared/**"
-      - ".github/workflows/mobile-ci.yml"
-  pull_request:
-    paths:
-      - "mobile/**"
-      - "shared/**"
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Node.js 20
-        uses: actions/setup-node@v4
-        with:
-          node-version: "20"
-          cache: "yarn"
-          cache-dependency-path: yarn.lock
-
-      - name: Install dependencies
-        run: yarn install --frozen-lockfile
-
-      - name: Type check shared
-        run: yarn workspace @cloud-reader/shared typecheck
-
-      - name: Build shared
-        run: yarn workspace @cloud-reader/shared build
-
-      - name: Type check mobile
-        run: yarn workspace @cloud-reader/mobile typecheck

.gitignore

@@ -1,48 +1,40 @@
-# Python
+node_modules
-__pycache__/
+dist
-*.py[cod]
+frontend/dist
-*.egg-info/
+frontend/dist/assets
-dist/
+frontend/dist/assets/index.html
-build/
+frontend/dist/assets/index.html.gz
-.eggs/
+frontend/dist/assets/index.html.br
-*.egg
+frontend/dist/assets/index.html.brotli
-.env
+frontend/dist/assets/index.html.gzip
-venv/
+frontend/dist/assets/index.html.br
-.venv/
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+frontend/dist/assets/index.html.br
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+frontend/dist/assets/index.html.br
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+frontend/dist/assets/index.html.br
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+mobile/dist
+backend/media
+backend/staticfiles
+backend/media
+backend/staticfiles
+.pycache__
+__pycache__
+*.pyc
+*.pyo
+*.pyd
+*.db
 *.sqlite3
-
+*.log
-# Node
+*.env
-node_modules/
+*.DS_Store
-.pnp
+*.vscode
-.pnp.js
+*.idea
-yarn-error.log*
-
-# Build artifacts
-dist/
-build/
-*.tsbuildinfo
-
-# IDE
-.vscode/
-.idea/
 *.swp
 *.swo
-.DS_Store
-
-# Django
-backend/media/
-backend/staticfiles/
-backend/**/migrations/
-
-# Expo / React Native
-mobile/.expo/
-mobile/ios/Pods/
-mobile/android/.gradle/
-mobile/android/app/build/
-mobile/android/build/
-mobile/*.hprof
-
-# Environment
-.env.local
-.env.production
-.env.development

AGENTS.md

@@ -0,0 +1,105 @@
+# AGENTS.md — Cloud Reader monorepo
+
+Guidance for AI agents and contributors working in this repository.
+
+## Repository layout
+
+```
+cloud-reader/
+├── backend/          # Django REST API (canonical backend)
+├── frontend/         # React + Vite + TypeScript (web)
+├── mobile/           # Expo React Native app
+├── packages/shared/  # @cloud-reader/shared types & utils
+├── docs/             # Feature specs and architecture notes
+└── docker-compose.yml
+```
+
+- **Backend** is the source of truth for API contracts, auth, and persistence.
+- **Frontend** and **mobile** consume the same REST API; share domain types via `@cloud-reader/shared` where practical.
+- Do not reintroduce removed `api/` or `web/` directories.
+
+## Documentation conventions
+
+| Location | Purpose |
+|----------|---------|
+| `docs/NNN-*.md` | Cross-cutting or product specs (e.g. `001-customizable-mobile-reading-experience.md`) |
+| `docs/backend/NNN-*.md` | Backend feature specs; use next sequential number (currently `010`) |
+| `docs/mobile/NNN-*.md` | Mobile (Expo) feature specs; use next sequential number (currently `010`) |
+| `docs/frontend/*.md` | Frontend-specific specs |
+
+When adding a **major backend feature**:
+
+1. Implement in `backend/apps/<app>/`.
+2. Add or update a numbered spec under `docs/backend/`.
+3. Include: objective, API contracts, models/services touched, env vars, and verification steps.
+
+Do not edit plan files in `.cursor/plans/` unless explicitly asked.
+
+## Backend (Django)
+
+- **Python:** 3.12+, managed with `uv` (`backend/pyproject.toml`, `backend/uv.lock`).
+- **Settings:** `backend/config/settings.py` (pydantic-settings) + `backend/config/django.py`.
+- **Apps:** `users`, `books`, `annotations`, `reader`.
+- **Auth:** JWT via `djangorestframework-simplejwt`; register/login at `/api/auth/`.
+- **Default permission:** `IsAuthenticated` — public endpoints must set `AllowAny` explicitly.
+- **URL routing:** Single `DefaultRouter` in `books/urls.py`; register specific prefixes (e.g. `ebooks`) **before** the empty `""` book route to avoid `{pk}` shadowing.
+- **Services:** Put non-trivial logic in `apps/<app>/services/` (not in views/serializers).
+- **Migrations:** Run after model changes; prefer reusing existing JSON fields (e.g. `EBook.metadata_json`) before new columns.
+- **Tests:** Only add when requested or when they cover non-obvious behavior.
+
+### Books domain
+
+- **`Book`:** Catalog/discovery entity (genres, reading status).
+- **`EBook`:** Per-user uploaded file (EPUB/PDF); primary import path via `POST /api/books/ebooks/`.
+- **`metadata_json` on EBook:** External metadata (Open Library, etc.).
+- **`cover_image` on EBook:** Stored file; library UI reads it from list/detail serializers.
+
+## Frontend (web)
+
+- **Entry:** `frontend/src/main.tsx` mounts `App.tsx` (React Router + auth).
+- **API client:** `frontend/src/api/client.ts` (axios, JWT refresh, base URL `/api`).
+- **Auth routes:** `/auth` (not `/login`).
+- **Imports:** Upload via `booksApi.uploadEBook`; library lists user `EBook`s.
+- **Styling:** Mix of inline styles and CSS modules; match surrounding patterns.
+- Do not add tests or new `.md` files unless requested.
+
+## Mobile (Expo)
+
+- Uses `@cloud-reader/shared` and mirrors web API patterns.
+- Token storage: AsyncStorage; base URL from `EXPO_PUBLIC_API_URL`.
+
+## Shared package
+
+- `packages/shared/src/types.ts` — domain types for web/mobile.
+- `packages/shared/src/utils.ts` — API endpoint constants, helpers.
+- Keep camelCase in TS; backend JSON may use snake_case (DRF default).
+
+## Code change principles
+
+1. **Minimize scope** — smallest correct diff; no drive-by refactors.
+2. **Match conventions** — read neighboring code before adding new patterns.
+3. **No over-engineering** — no extra abstractions for one-off use.
+4. **Comments** — only for non-obvious business logic.
+5. **Imports** — remove unused imports; delete dead code after refactors.
+6. **Secrets** — never commit `.env`; document vars in `.env.example` only.
+
+## Git & PRs
+
+- Commit only when the user asks.
+- Do not force-push `main`/`master`.
+- Use `gh` for GitHub PRs when requested.
+
+## Postman
+
+- Use camelCase operation names (`listSomething`, `createSomething`).
+- Ask which env vars the user uses; output JSON to copy, not a new file.
+
+## Commands (run locally when needed)
+
+```bash
+# Backend
+cd backend && uv sync && uv run python manage.py migrate && uv run python manage.py runserver
+
+# Frontend
+cd frontend && yarn install && yarn dev
+```

README.md

@@ -1,195 +1,93 @@
 # Cloud Reader
 
-A modern eBook reader with web and mobile clients, powered by Django REST Framework.
+A full-stack e-book reader application with cross-device sync. Upload EPUB/PDF files, track reading progress, bookmark passages, take notes, and customize your reading experience.
 
-## Monorepo Structure
+## Architecture
 
 ```
 cloud-reader/
-├── backend/            # Django API server (Python 3.12 + DRF)
+├── backend/         # Django REST API (canonical backend)
-│   ├── config/         # Django project settings
+│   ├── config/      # Django project settings
-│   ├── apps/           # Django applications
+│   ├── apps/
-│   │   ├── accounts/   # User authentication & profiles
+│   │   ├── users/       # User auth (JWT)
-│   │   ├── documents/  # Document management & uploads
+│   │   ├── books/       # Books, e-books, reading progress, settings
-│   │   ├── collections/# Document collections
+│   │   └── annotations/ # Bookmarks and notes
-│   │   └── reading/    # Bookmarks, highlights, reading progress
+│   ├── manage.py
-│   ├── requirements/   # pip dependency files
+│   └── requirements.txt
-│   ├── Dockerfile
+├── frontend/        # React + Vite + TypeScript (web frontend)
-│   └── manage.py
-├── frontend/           # React web app (TypeScript + Vite)
 │   ├── src/
-│   │   ├── pages/      # Route pages (lazy-loaded)
+│   │   ├── api/         # API client (axios with JWT refresh)
-│   │   ├── hooks/      # Custom React hooks
+│   │   ├── components/  # Reusable components
-│   │   ├── services/   # API client & auth service
+│   │   ├── context/     # Auth and annotations context
-│   │   ├── types/      # Frontend-specific types
+│   │   ├── hooks/       # Custom hooks
-│   │   └── styles/     # Global CSS
+│   │   ├── pages/       # Route pages (Library, Reader, AddBook, Auth, Settings)
-│   ├── Dockerfile
+│   │   └── types/       # TypeScript type definitions
-│   └── vite.config.ts
+│   └── package.json
-├── mobile/             # Expo/React Native mobile app
+├── mobile/          # Expo React Native app (mobile frontend)
-│   ├── app/            # Expo Router pages
+│   ├── src/
-│   ├── src/            # Mobile source code
+│   │   ├── api/         # API client (axios with JWT refresh via AsyncStorage)
-│   ├── app.json
+│   │   ├── components/  # Reusable UI components
-│   └── Dockerfile
+│   │   ├── context/     # Auth context
-├── shared/             # Shared TypeScript types & utilities
+│   │   ├── hooks/       # Custom hooks
-│   └── src/
+│   │   ├── navigation/  # React Navigation (Auth stack + Main tabs)
-│       └── index.ts    # API response types, constants
+│   │   ├── screens/     # Screen-level components (Login, Library, etc.)
-├── .github/workflows/  # CI/CD pipelines
+│   │   └── types/       # Mobile-specific types
-└── package.json        # Yarn workspace root
+│   ├── App.tsx
+│   └── app.json
+├── packages/
+│   └── shared/       # @cloud-reader/shared — domain types & utilities
+│       └── src/
+│           ├── types.ts   # Shared domain types (Book, User, Bookmark, Note, etc.)
+│           └── utils.ts   # Date formatting, validation, API endpoint constants
+├── package.json      # Root — yarn workspaces config
+└── docker-compose.yml
 ```
 
-## Prerequisites
+## Quick Start
 
-- **Python** 3.12+
+### Docker (recommended)
-- **Node.js** 20 LTS
+```bash
-- **Yarn** 4.x
+cp env.example .env
-- **PostgreSQL** 16
+```
-- **Expo CLI** (for mobile development)
+```bash
-
+docker compose up --build
----
+```
-
+- **Frontend:** http://localhost:5173
-## Backend Setup
+- **Backend API:** http://localhost:8000/api/
 
+### Backend (standalone)
 ```bash
 cd backend
-
+pip install -r requirements.txt
-# Create virtual environment
-python -m venv .venv
-source .venv/bin/activate  # Linux/macOS
-# .venv\Scripts\activate   # Windows
-
-# Install dependencies
-pip install -r requirements/dev.txt
-
-# Configure environment
-cp .env.example .env
-# Edit .env with your PostgreSQL credentials
-
-# Run migrations
 python manage.py migrate
-
-# Create admin user
-python manage.py createsuperuser
-
-# Start development server
 python manage.py runserver
 ```
 
-The API will be available at `http://localhost:8000/`. Browse the API at `http://localhost:8000/api/schema/swagger-ui/`.
+### Frontend (standalone)
-
-### Backend Tests
-
 ```bash
-cd backend
+cd frontend
-pytest
-```
-
----
-
-## Frontend Setup
-
-```bash
-# From monorepo root
 yarn install
-
+yarn dev
-# Start dev server (with API proxy)
-yarn frontend:dev
 ```
 
-The frontend will be available at `http://localhost:5173/`. API requests under `/api/` are proxied to `http://localhost:8000/`.
+### Mobile (Expo)
-
-### Frontend Build
-
 ```bash
-yarn frontend:build
+# From monorepo root — installs all workspaces including mobile
-```
-
----
-
-## Mobile Setup
-
-```bash
-# From monorepo root
 yarn install
 
 # Start Expo dev server
-yarn mobile:start
+yarn workspace @cloud-reader/mobile start
 
-# Run on Android
+# Or cd into mobile and run directly
-yarn mobile:android
+cd mobile
-
+npx expo start
-# Run on iOS (macOS only)
-yarn mobile:ios
 ```
 
-> The mobile API client defaults to `http://localhost:8000/`. For physical devices, update the `API_BASE` in `mobile/src/services/api.ts` to your machine's local IP.
+> The mobile app requires the backend to be running. Set `EXPO_PUBLIC_API_URL` environment variable in your shell or `.env` file to point to the backend (defaults to `http://10.0.2.2:8000` for Android emulator).
 
----
+## Migration Notes
-
+Consolidated from duplicate `api/` + `web/` into single `backend/` + `frontend/` canonical structure.
-## Shared Package
+- `backend/` kept as canonical; `api/` features (e-book uploads, reading progress, reading settings) merged in.
-
+- `frontend/` kept as canonical; `web/` pages (Library, Reader, AddBook, Auth, Settings) merged in.
-The `shared/` package contains TypeScript types and constants used by both the frontend and mobile apps.
+- `api/` and `web/` directories removed.
-
+- `mobile/` added as Expo React Native app with shared `@cloud-reader/shared` package.
-```bash
-# Build shared package
-yarn shared:build
-```
-
----
-
-## CI/CD
-
-Three independent CI pipelines run on pushes and PRs:
-
-| Pipeline | Trigger Path | What It Does |
-|----------|-------------|--------------|
-| **Backend CI** | `backend/**` | Installs Python deps, runs Ruff linter, applies migrations, runs pytest |
-| **Frontend CI** | `frontend/**`, `shared/**` | Installs Node deps, type-check & build shared, type-check & build frontend |
-| **Mobile CI** | `mobile/**`, `shared/**` | Installs Node deps, type-check shared & mobile |
-
-Pipeline configs are in `.github/workflows/`.
-
-### Docker Deployments
-
-Each app has its own Dockerfile for independent deployment:
-
-```bash
-# Build backend image
-docker build -t cloud-reader-backend backend/
-
-# Build frontend image
-docker build -t cloud-reader-frontend frontend/
-
-# Build mobile image (web export)
-docker build -t cloud-reader-mobile mobile/
-```
-
----
-
-## API Endpoints
-
-| Endpoint | Description |
-|----------|-------------|
-| `POST /api/v1/auth/register/` | Create a new account |
-| `POST /api/v1/auth/token/` | Obtain JWT tokens |
-| `POST /api/v1/auth/token/refresh/` | Refresh JWT token |
-| `GET /api/v1/auth/me/` | Get current user profile |
-| `GET/POST /api/v1/documents/` | List / upload documents |
-| `GET/PUT/DELETE /api/v1/documents/:id/` | Document detail |
-| `GET/POST /api/v1/collections/` | List / create collections |
-| `GET/PUT/DELETE /api/v1/collections/:id/` | Collection detail |
-| `POST /api/v1/collections/:id/add_documents/` | Add docs to collection |
-| `POST /api/v1/collections/:id/remove_documents/` | Remove docs from collection |
-| `GET/POST /api/v1/reading/bookmarks/` | List / create bookmarks |
-| `GET/POST /api/v1/reading/highlights/` | List / create highlights |
-| `GET/POST /api/v1/reading/progress/` | Track reading progress |
-
----
-
-## Tech Stack
-
-- **Backend:** Django 5, Django REST Framework, SimpleJWT, PostgreSQL, drf-spectacular
-- **Frontend:** React 18, TypeScript, Vite, React Router, Axios
-- **Mobile:** Expo SDK 51, React Native 0.74, Expo Router
-- **Shared:** TypeScript types, Zod schemas
-- **CI/CD:** GitHub Actions
-- **Container:** Docker (separate images per app)

backend/.env.example

@@ -1,15 +1,16 @@
-# Cloud Reader Backend — Environment Variables
+# Backend environment (example – never commit real secrets)
-# Copy to .env and fill in your values.
+DJANGO_SECRET_KEY=django-insecure-change-me-in-production
-
+DJANGO_DEBUG=True
-SECRET_KEY=django-insecure-change-me-in-production
-DEBUG=True
-
-DB_ENGINE=django.db.backends.postgresql
 DB_NAME=cloud_reader
-DB_USER=cloud_reader
+DB_USER=postgres
-DB_PASSWORD=cloud_reader
+DB_PASSWORD=postgres
 DB_HOST=localhost
 DB_PORT=5432
 
-CORS_ALLOWED_ORIGINS=http://localhost:5173,http://localhost:3000
+# Open Library metadata enrichment (optional)
-ALLOWED_HOSTS=localhost,127.0.0.1
+OPENLIBRARY_ENABLED=true
+OPENLIBRARY_PREFERRED_LANG=es
+OPENLIBRARY_FALLBACK_LANG=en
+OPENLIBRARY_TIMEOUT_SECONDS=10
+OPENLIBRARY_CONNECT_TIMEOUT_SECONDS=15
+OPENLIBRARY_USER_AGENT=CloudReader/1.0

backend/.python-version

@@ -0,0 +1 @@
+3.12

backend/Dockerfile

@@ -1,18 +1,18 @@
 FROM python:3.12-slim
 
-ENV PYTHONDONTWRITEBYTECODE=1 \
-    PYTHONUNBUFFERED=1 \
-    DJANGO_SETTINGS_MODULE=config.settings
-
 WORKDIR /app
 
-COPY requirements/production.txt /app/requirements/
+RUN apt-get update && apt-get install -y --no-install-recommends \
-RUN pip install --no-cache-dir -r requirements/production.txt
+    libpq-dev gcc && \
+    rm -rf /var/lib/apt/lists/*
 
-COPY . /app
+COPY requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
 
-RUN python manage.py collectstatic --noinput
+COPY . ./
+
+RUN mkdir -p media
 
 EXPOSE 8000
 
-CMD ["gunicorn", "config.wsgi:application", "--bind", "0.0.0.0:8000", "--workers", "4"]
+CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]

backend/apps/accounts/admin.py

@@ -1,10 +0,0 @@
-from django.contrib import admin
-
-from .models import User
-
-
-@admin.register(User)
-class UserAdmin(admin.ModelAdmin):
-    list_display = ["email", "display_name", "is_verified", "is_active", "date_joined"]
-    search_fields = ["email", "display_name"]
-    list_filter = ["is_verified", "is_active"]

backend/apps/accounts/models.py

@@ -1,29 +0,0 @@
-from django.contrib.auth.models import AbstractUser
-from django.db import models
-
-
-class User(AbstractUser):
-    """Custom user model for Cloud Reader."""
-
-    email = models.EmailField(unique=True)
-    display_name = models.CharField(max_length=150, blank=True)
-    avatar = models.ImageField(upload_to="avatars/", blank=True, null=True)
-    is_verified = models.BooleanField(default=False)
-    reading_preferences = models.JSONField(default=dict, blank=True)
-
-    USERNAME_FIELD = "email"
-    REQUIRED_FIELDS = ["username"]
-
-    class Meta:
-        db_table = "accounts_user"
-        verbose_name = "User"
-        verbose_name_plural = "Users"
-
-    def __str__(self) -> str:
-        return self.email
-
-    @property
-    def avatar_url(self) -> str | None:
-        if self.avatar:
-            return self.avatar.url
-        return None

backend/apps/accounts/serializers.py

@@ -1,53 +0,0 @@
-from django.contrib.auth import get_user_model
-from rest_framework import serializers
-
-from .models import User
-
-UserModel = get_user_model()
-
-
-class RegisterSerializer(serializers.ModelSerializer[User]):
-    password = serializers.CharField(write_only=True, min_length=8)
-    password_confirm = serializers.CharField(write_only=True, min_length=8)
-
-    class Meta:
-        model = User
-        fields = ["email", "username", "display_name", "password", "password_confirm"]
-
-    def validate(self, attrs):
-        if attrs["password"] != attrs.pop("password_confirm"):
-            raise serializers.ValidationError({"password_confirm": "Passwords do not match."})
-        return attrs
-
-    def create(self, validated_data):
-        password = validated_data.pop("password")
-        user = UserModel(**validated_data)
-        user.set_password(password)
-        user.save()
-        return user
-
-
-class UserSerializer(serializers.ModelSerializer[User]):
-    avatar_url = serializers.SerializerMethodField()
-
-    class Meta:
-        model = User
-        fields = [
-            "id", "email", "username", "display_name", "avatar_url",
-            "date_joined", "is_verified", "reading_preferences",
-        ]
-        read_only_fields = ["id", "email", "date_joined", "is_verified"]
-
-    def get_avatar_url(self, obj: User) -> str | None:
-        return obj.avatar_url
-
-
-class ChangePasswordSerializer(serializers.Serializer):
-    old_password = serializers.CharField(required=True)
-    new_password = serializers.CharField(required=True, min_length=8)
-
-    def validate_old_password(self, value: str) -> str:
-        user = self.context["request"].user
-        if not user.check_password(value):
-            raise serializers.ValidationError("Current password is incorrect.")
-        return value

backend/apps/accounts/urls.py

@@ -1,14 +0,0 @@
-from django.urls import path
-from rest_framework_simplejwt.views import TokenObtainPairView, TokenRefreshView
-
-from . import views
-
-app_name = "accounts"
-
-urlpatterns = [
-    path("register/", views.RegisterView.as_view(), name="register"),
-    path("me/", views.UserDetailView.as_view(), name="user-detail"),
-    path("change-password/", views.ChangePasswordView.as_view(), name="change-password"),
-    path("token/", TokenObtainPairView.as_view(), name="token-obtain"),
-    path("token/refresh/", TokenRefreshView.as_view(), name="token-refresh"),
-]

backend/apps/accounts/views.py

@@ -1,36 +0,0 @@
-from django.contrib.auth import get_user_model
-from rest_framework import generics, permissions, status
-from rest_framework.response import Response
-from rest_framework.views import APIView
-
-from .serializers import ChangePasswordSerializer, RegisterSerializer, UserSerializer
-
-UserModel = get_user_model()
-
-
-class RegisterView(generics.CreateAPIView):
-    """Create a new user account."""
-    queryset = UserModel.objects.all()
-    serializer_class = RegisterSerializer
-    permission_classes = [permissions.AllowAny]
-
-
-class UserDetailView(generics.RetrieveUpdateAPIView):
-    """Get or update the authenticated user's profile."""
-    serializer_class = UserSerializer
-    permission_classes = [permissions.IsAuthenticated]
-
-    def get_object(self):
-        return self.request.user
-
-
-class ChangePasswordView(APIView):
-    """Change the authenticated user's password."""
-    permission_classes = [permissions.IsAuthenticated]
-
-    def post(self, request):
-        serializer = ChangePasswordSerializer(data=request.data, context={"request": request})
-        serializer.is_valid(raise_exception=True)
-        request.user.set_password(serializer.validated_data["new_password"])
-        request.user.save()
-        return Response({"detail": "Password changed successfully."}, status=status.HTTP_200_OK)

backend/apps/annotations/admin.py

@@ -0,0 +1,27 @@
+from django.contrib import admin
+
+from apps.annotations.models import Bookmark, Note
+
+
+@admin.register(Bookmark)
+class BookmarkAdmin(admin.ModelAdmin):
+    list_display = (
+        "user",
+        "ebook",
+        "chapter_index",
+        "chapter_title",
+        "page",
+        "highlight_color",
+        "created_at",
+    )
+    list_select_related = ("user", "ebook")
+    search_fields = ("user__email", "ebook__title", "location_text", "content")
+    list_filter = ("created_at",)
+
+
+@admin.register(Note)
+class NoteAdmin(admin.ModelAdmin):
+    list_display = ("user", "book", "page", "created_at", "updated_at")
+    list_select_related = ("user", "book")
+    search_fields = ("user__email", "book__title", "content", "location_text")
+    list_filter = ("created_at",)

backend/apps/annotations/apps.py

@@ -0,0 +1,7 @@
+from django.apps import AppConfig
+
+
+class AnnotationsConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.annotations"
+    label = "annotations"

backend/apps/annotations/migrations/0001_initial.py

@@ -0,0 +1,57 @@
+# Generated by Django 5.1.7 on 2026-06-03 22:27
+
+import django.db.models.deletion
+import uuid
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('books', '0002_ebook_file_size_ebook_format_ebook_metadata_json_and_more'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Note',
+            fields=[
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('page', models.PositiveIntegerField()),
+                ('location_text', models.TextField(blank=True, default='', help_text='The selected passage text this note refers to')),
+                ('content', models.TextField(help_text='The note body content')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('book', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='notes', to='books.book')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='notes', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'Note',
+                'verbose_name_plural': 'Notes',
+                'db_table': 'annotations_note',
+                'ordering': ['-created_at'],
+            },
+        ),
+        migrations.CreateModel(
+            name='Bookmark',
+            fields=[
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('page', models.PositiveIntegerField()),
+                ('location_text', models.TextField(blank=True, default='', help_text='The selected passage text at this location')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('book', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='bookmarks', to='books.book')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='bookmarks', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'Bookmark',
+                'verbose_name_plural': 'Bookmarks',
+                'db_table': 'annotations_bookmark',
+                'ordering': ['-created_at'],
+                'constraints': [models.UniqueConstraint(fields=('user', 'book', 'page'), name='uq_bookmark_user_book_page')],
+            },
+        ),
+    ]

backend/apps/annotations/migrations/0002_bookmark_ebook_epub_fields.py

@@ -0,0 +1,93 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+def clear_legacy_bookmarks(apps, schema_editor):
+    Bookmark = apps.get_model("annotations", "Bookmark")
+    Bookmark.objects.all().delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("books", "0003_readingprogress_epub_location"),
+        ("annotations", "0001_initial"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.RunPython(clear_legacy_bookmarks, migrations.RunPython.noop),
+        migrations.RemoveConstraint(
+            model_name="bookmark",
+            name="uq_bookmark_user_book_page",
+        ),
+        migrations.RemoveField(
+            model_name="bookmark",
+            name="book",
+        ),
+        migrations.AddField(
+            model_name="bookmark",
+            name="ebook",
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="bookmarks",
+                to="books.ebook",
+                null=True,
+            ),
+        ),
+        migrations.AddField(
+            model_name="bookmark",
+            name="epub_cfi",
+            field=models.CharField(db_index=True, default="", max_length=2048),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name="bookmark",
+            name="chapter_index",
+            field=models.PositiveIntegerField(db_index=True, default=0),
+        ),
+        migrations.AddField(
+            model_name="bookmark",
+            name="chapter_title",
+            field=models.CharField(blank=True, default="", max_length=512),
+        ),
+        migrations.AddField(
+            model_name="bookmark",
+            name="content",
+            field=models.TextField(blank=True, default=""),
+        ),
+        migrations.AlterField(
+            model_name="bookmark",
+            name="page",
+            field=models.PositiveIntegerField(
+                default=1,
+                help_text="Legacy/display page; derived from chapter_index + 1",
+            ),
+        ),
+        migrations.AlterModelOptions(
+            name="bookmark",
+            options={
+                "ordering": ["chapter_index", "epub_cfi"],
+                "verbose_name": "Bookmark",
+                "verbose_name_plural": "Bookmarks",
+            },
+        ),
+        # ebook was added nullable for SQLite; enforce NOT NULL via AlterField
+        migrations.AlterField(
+            model_name="bookmark",
+            name="ebook",
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="bookmarks",
+                to="books.ebook",
+            ),
+        ),
+        migrations.AddConstraint(
+            model_name="bookmark",
+            constraint=models.UniqueConstraint(
+                fields=("user", "ebook", "epub_cfi"),
+                name="uq_bookmark_user_ebook_cfi",
+            ),
+        ),
+    ]

backend/apps/annotations/migrations/0003_bookmark_highlight_color.py

@@ -0,0 +1,16 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("annotations", "0002_bookmark_ebook_epub_fields"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="bookmark",
+            name="highlight_color",
+            field=models.CharField(default="#fde047", max_length=7),
+        ),
+    ]

backend/apps/annotations/migrations/0004_alter_bookmark_content_and_more.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.1.7 on 2026-06-04 03:31
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('annotations', '0003_bookmark_highlight_color'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bookmark',
+            name='content',
+            field=models.TextField(blank=True, default='', help_text='Optional user thought; empty means bookmark-only'),
+        ),
+        migrations.AlterField(
+            model_name='bookmark',
+            name='highlight_color',
+            field=models.CharField(default='#fde047', help_text='Hex color for in-book passage highlight (e.g. #fde047)', max_length=7),
+        ),
+    ]

backend/apps/annotations/models.py

@@ -0,0 +1,100 @@
+import uuid
+
+from django.conf import settings
+from django.db import models
+
+
+class Bookmark(models.Model):
+    """A saved passage anchor in an uploaded ebook (EPUB CFI + optional thought)."""
+
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="bookmarks",
+        db_index=True,
+    )
+    ebook = models.ForeignKey(
+        "books.EBook",
+        on_delete=models.CASCADE,
+        related_name="bookmarks",
+        db_index=True,
+    )
+    epub_cfi = models.CharField(max_length=2048, db_index=True)
+    chapter_index = models.PositiveIntegerField(default=0, db_index=True)
+    chapter_title = models.CharField(max_length=512, blank=True, default="")
+    page = models.PositiveIntegerField(
+        default=1,
+        help_text="Legacy/display page; derived from chapter_index + 1",
+    )
+    location_text = models.TextField(
+        blank=True,
+        default="",
+        help_text="The selected passage text at this location",
+    )
+    content = models.TextField(
+        blank=True,
+        default="",
+        help_text="Optional user thought; empty means bookmark-only",
+    )
+    highlight_color = models.CharField(
+        max_length=7,
+        default="#fde047",
+        help_text="Hex color for in-book passage highlight (e.g. #fde047)",
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "annotations_bookmark"
+        verbose_name = "Bookmark"
+        verbose_name_plural = "Bookmarks"
+        ordering = ["chapter_index", "epub_cfi"]
+        constraints = [
+            models.UniqueConstraint(
+                fields=["user", "ebook", "epub_cfi"],
+                name="uq_bookmark_user_ebook_cfi",
+            )
+        ]
+
+    def __str__(self) -> str:
+        return f"{self.user} @ {self.ebook} ch.{self.chapter_index}"
+
+
+class Note(models.Model):
+    """Legacy note model; new UX uses Bookmark.content instead."""
+
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="notes",
+        db_index=True,
+    )
+    book = models.ForeignKey(
+        "books.Book",
+        on_delete=models.CASCADE,
+        related_name="notes",
+        db_index=True,
+    )
+    page = models.PositiveIntegerField()
+    location_text = models.TextField(
+        blank=True,
+        default="",
+        help_text="The selected passage text this note refers to",
+    )
+    content = models.TextField(
+        help_text="The note body content"
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "annotations_note"
+        verbose_name = "Note"
+        verbose_name_plural = "Notes"
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        preview = self.content[:50]
+        return f"{self.user} @ {self.book} p.{self.page}: {preview}"

backend/apps/annotations/permissions.py

@@ -0,0 +1,8 @@
+from rest_framework import permissions
+
+
+class IsOwner(permissions.BasePermission):
+    """Grant access only if the requesting user owns the object."""
+
+    def has_object_permission(self, request, view, obj) -> bool:
+        return obj.user == request.user

backend/apps/annotations/serializers.py

@@ -0,0 +1,124 @@
+import re
+
+from rest_framework import serializers
+
+from apps.annotations.models import Bookmark, Note
+
+_HEX_COLOR_RE = re.compile(r"^#[0-9A-Fa-f]{6}$")
+
+
+def validate_highlight_color(value: str) -> str:
+    stripped = (value or "").strip()
+    if not _HEX_COLOR_RE.match(stripped):
+        raise serializers.ValidationError("highlight_color must be a hex color like #fde047.")
+    return stripped.lower()
+
+
+class BookmarkSerializer(serializers.ModelSerializer):
+    ebook_title = serializers.CharField(source="ebook.title", read_only=True)
+
+    class Meta:
+        model = Bookmark
+        fields = [
+            "id",
+            "ebook",
+            "ebook_title",
+            "epub_cfi",
+            "chapter_index",
+            "chapter_title",
+            "page",
+            "location_text",
+            "content",
+            "highlight_color",
+            "created_at",
+            "updated_at",
+        ]
+        read_only_fields = ["id", "created_at", "updated_at", "ebook_title", "page"]
+
+
+class BookmarkCreateSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Bookmark
+        fields = [
+            "ebook",
+            "epub_cfi",
+            "chapter_index",
+            "chapter_title",
+            "location_text",
+            "content",
+            "highlight_color",
+        ]
+
+    def validate_highlight_color(self, value: str) -> str:
+        return validate_highlight_color(value)
+
+    def validate_epub_cfi(self, value: str) -> str:
+        stripped = (value or "").strip()
+        if not stripped:
+            raise serializers.ValidationError("epub_cfi is required.")
+        return stripped
+
+    def validate_chapter_index(self, value: int) -> int:
+        if value < 0:
+            raise serializers.ValidationError("chapter_index must be non-negative.")
+        return value
+
+    def validate(self, attrs):
+        user = self.context["request"].user
+        ebook = attrs["ebook"]
+        epub_cfi = attrs["epub_cfi"]
+        if Bookmark.objects.filter(user=user, ebook=ebook, epub_cfi=epub_cfi).exists():
+            raise serializers.ValidationError(
+                {"epub_cfi": "A marker already exists for this passage."}
+            )
+        return attrs
+
+    def create(self, validated_data):
+        validated_data["user"] = self.context["request"].user
+        validated_data["page"] = validated_data.get("chapter_index", 0) + 1
+        validated_data["content"] = (validated_data.get("content") or "").strip()
+        return super().create(validated_data)
+
+
+class NoteSerializer(serializers.ModelSerializer):
+    book_title = serializers.CharField(source="book.title", read_only=True)
+
+    class Meta:
+        model = Note
+        fields = [
+            "id",
+            "book",
+            "book_title",
+            "page",
+            "location_text",
+            "content",
+            "created_at",
+            "updated_at",
+        ]
+        read_only_fields = ["id", "created_at", "updated_at", "book_title"]
+
+    def validate_page(self, value: int) -> int:
+        if value < 1:
+            raise serializers.ValidationError("Page must be a positive integer.")
+        return value
+
+
+class NoteCreateSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Note
+        fields = ["book", "page", "location_text", "content"]
+
+    def validate_page(self, value: int) -> int:
+        if value < 1:
+            raise serializers.ValidationError("Page must be a positive integer.")
+        return value
+
+    def validate_content(self, value: str) -> str:
+        stripped = value.strip()
+        if not stripped:
+            raise serializers.ValidationError("Note content cannot be empty.")
+        return stripped
+
+    def create(self, validated_data):
+        validated_data["user"] = self.context["request"].user
+        return super().create(validated_data)

backend/apps/annotations/tests.py

@@ -0,0 +1,166 @@
+"""Tests for the annotations app – Bookmarks & Notes API."""
+
+import pytest
+from django.urls import reverse
+from rest_framework import status
+from rest_framework.test import APIClient
+
+from apps.annotations.models import Bookmark, Note
+from apps.books.models import Book, EBook
+from apps.users.models import User
+
+
+@pytest.fixture
+def api_client() -> APIClient:
+    return APIClient()
+
+
+@pytest.fixture
+def user() -> User:
+    return User.objects.create_user(
+        username="testuser",
+        email="test@example.com",
+        password="testpass123",
+    )
+
+
+@pytest.fixture
+def other_user() -> User:
+    return User.objects.create_user(
+        username="other",
+        email="other@example.com",
+        password="testpass123",
+    )
+
+
+@pytest.fixture
+def auth_client(api_client: APIClient, user: User) -> APIClient:
+    api_client.force_authenticate(user=user)
+    return api_client
+
+
+@pytest.fixture
+def book() -> Book:
+    return Book.objects.create(
+        title="Test Book",
+        author="Test Author",
+        total_pages=300,
+    )
+
+
+@pytest.fixture
+def ebook(user: User) -> EBook:
+    return EBook.objects.create(
+        user=user,
+        title="Test Ebook",
+        author="Test Author",
+        format="epub",
+    )
+
+
+@pytest.fixture
+def bookmark(auth_client, user: User, ebook: EBook) -> Bookmark:
+    return Bookmark.objects.create(
+        user=user,
+        ebook=ebook,
+        epub_cfi="epubcfi(/6/4!/4/2,/1:0,/1:10)",
+        chapter_index=2,
+        chapter_title="Chapter 3",
+        page=3,
+        location_text="important passage",
+        content="",
+    )
+
+
+@pytest.fixture
+def note(auth_client, user: User, book: Book) -> Note:
+    return Note.objects.create(
+        user=user,
+        book=book,
+        page=15,
+        location_text="highlighted section",
+        content="This is my note about this section.",
+    )
+
+
+class TestBookmarkList:
+    url = reverse("bookmark-list")
+
+    def test_list_requires_auth(self, api_client: APIClient):
+        response = api_client.get(self.url)
+        assert response.status_code == status.HTTP_401_UNAUTHORIZED
+
+    def test_list_returns_user_bookmarks_only(
+        self, auth_client: APIClient, user: User, other_user: User, ebook: EBook
+    ):
+        Bookmark.objects.create(
+            user=user,
+            ebook=ebook,
+            epub_cfi="epubcfi(/6/4!/4/2,/1:0,/1:5)",
+            chapter_index=0,
+            page=1,
+        )
+        other_ebook = EBook.objects.create(user=other_user, title="Other", format="epub")
+        Bookmark.objects.create(
+            user=other_user,
+            ebook=other_ebook,
+            epub_cfi="epubcfi(/6/4!/4/2,/2:0,/2:5)",
+            chapter_index=0,
+            page=1,
+        )
+        response = auth_client.get(self.url)
+        assert response.status_code == status.HTTP_200_OK
+        results = response.data["results"]
+        assert len(results) == 1
+
+    def test_filter_by_ebook(self, auth_client: APIClient, bookmark: Bookmark, ebook: EBook):
+        response = auth_client.get(self.url, {"ebook": str(ebook.id)})
+        assert response.status_code == status.HTTP_200_OK
+        assert len(response.data["results"]) == 1
+
+
+class TestBookmarkCreate:
+    url = reverse("bookmark-list")
+
+    def test_create_marker(self, auth_client: APIClient, ebook: EBook):
+        data = {
+            "ebook": ebook.id,
+            "epub_cfi": "epubcfi(/6/4!/4/2,/1:0,/1:20)",
+            "chapter_index": 1,
+            "chapter_title": "Chapter 2",
+            "location_text": "Selected text",
+            "content": "My thought",
+        }
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_201_CREATED
+        assert response.data["content"] == "My thought"
+        assert response.data["ebook"] == ebook.id
+
+    def test_create_bookmark_only_empty_content(self, auth_client: APIClient, ebook: EBook):
+        data = {
+            "ebook": ebook.id,
+            "epub_cfi": "epubcfi(/6/4!/4/2,/3:0,/3:8)",
+            "chapter_index": 0,
+            "location_text": "Quote only",
+            "content": "",
+        }
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_201_CREATED
+        assert response.data["content"] == ""
+
+    def test_duplicate_cfi_rejected(self, auth_client: APIClient, bookmark: Bookmark, ebook: EBook):
+        data = {
+            "ebook": ebook.id,
+            "epub_cfi": bookmark.epub_cfi,
+            "chapter_index": 0,
+            "location_text": "dup",
+        }
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_400_BAD_REQUEST
+
+
+class TestBookmarkDetail:
+    def test_delete_bookmark(self, auth_client: APIClient, bookmark: Bookmark):
+        url = reverse("bookmark-detail", args=[str(bookmark.id)])
+        response = auth_client.delete(url)
+        assert response.status_code == status.HTTP_204_NO_CONTENT

backend/apps/annotations/urls.py

@@ -0,0 +1,12 @@
+from django.urls import include, path
+from rest_framework.routers import DefaultRouter
+
+from apps.annotations.views import BookmarkViewSet, NoteViewSet
+
+router = DefaultRouter()
+router.register(r"bookmarks", BookmarkViewSet, basename="bookmark")
+router.register(r"notes", NoteViewSet, basename="note")
+
+urlpatterns = [
+    path("", include(router.urls)),
+]

backend/apps/annotations/views.py

@@ -0,0 +1,83 @@
+from django_filters.rest_framework import DjangoFilterBackend
+from rest_framework import status, viewsets
+from rest_framework.decorators import action
+from rest_framework.filters import OrderingFilter, SearchFilter
+from rest_framework.permissions import IsAuthenticated
+from rest_framework.response import Response
+
+from apps.annotations.models import Bookmark, Note
+from apps.annotations.permissions import IsOwner
+from apps.annotations.serializers import (
+    BookmarkCreateSerializer,
+    BookmarkSerializer,
+    NoteCreateSerializer,
+    NoteSerializer,
+)
+
+
+class BookmarkViewSet(viewsets.ModelViewSet):
+    """CRUD for user ebook markers (passage anchors + optional thoughts)."""
+
+    permission_classes = [IsAuthenticated, IsOwner]
+    filter_backends = [DjangoFilterBackend, SearchFilter, OrderingFilter]
+    filterset_fields = ["ebook"]
+    search_fields = ["location_text", "content", "chapter_title"]
+    ordering_fields = ["chapter_index", "epub_cfi", "created_at"]
+    ordering = ["chapter_index", "epub_cfi"]
+
+    def get_serializer_class(self):
+        if self.action == "create":
+            return BookmarkCreateSerializer
+        return BookmarkSerializer
+
+    def get_queryset(self):
+        return Bookmark.objects.filter(user=self.request.user).select_related("ebook")
+
+    def perform_create(self, serializer):
+        serializer.save(user=self.request.user)
+
+    @action(detail=False, methods=["delete"], url_path="batch-delete")
+    def batch_delete(self, request):
+        ids = request.data.get("ids", [])
+        if not ids:
+            return Response(
+                {"detail": "No ids provided."}, status=status.HTTP_400_BAD_REQUEST
+            )
+        deleted, _ = Bookmark.objects.filter(
+            id__in=ids, user=request.user
+        ).delete()
+        return Response({"deleted": deleted}, status=status.HTTP_200_OK)
+
+
+class NoteViewSet(viewsets.ModelViewSet):
+    """Legacy notes API (catalog Book FK)."""
+
+    permission_classes = [IsAuthenticated, IsOwner]
+    filter_backends = [DjangoFilterBackend, SearchFilter, OrderingFilter]
+    filterset_fields = ["book"]
+    search_fields = ["content", "location_text"]
+    ordering_fields = ["created_at", "page"]
+    ordering = ["-created_at"]
+
+    def get_serializer_class(self):
+        if self.action == "create":
+            return NoteCreateSerializer
+        return NoteSerializer
+
+    def get_queryset(self):
+        return Note.objects.filter(user=self.request.user).select_related("book")
+
+    def perform_create(self, serializer):
+        serializer.save(user=self.request.user)
+
+    @action(detail=False, methods=["delete"], url_path="batch-delete")
+    def batch_delete(self, request):
+        ids = request.data.get("ids", [])
+        if not ids:
+            return Response(
+                {"detail": "No ids provided."}, status=status.HTTP_400_BAD_REQUEST
+            )
+        deleted, _ = Note.objects.filter(
+            id__in=ids, user=request.user
+        ).delete()
+        return Response({"deleted": deleted}, status=status.HTTP_200_OK)

backend/apps/books/admin.py

@@ -0,0 +1,9 @@
+from django.contrib import admin
+
+from apps.books.models import Book
+
+
+@admin.register(Book)
+class BookAdmin(admin.ModelAdmin):
+    list_display = ("title", "author", "total_pages", "created_at")
+    search_fields = ("title", "author")

backend/apps/books/apps.py

@@ -0,0 +1,7 @@
+from django.apps import AppConfig
+
+
+class BooksConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.books"
+    label = "books"

backend/apps/books/migrations/0001_initial.py

@@ -0,0 +1,96 @@
+# Generated by Django 5.1.7 on 2026-05-26 03:33
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Book',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(db_index=True, max_length=512)),
+                ('author', models.CharField(blank=True, db_index=True, default='', max_length=256)),
+                ('genre', models.CharField(blank=True, db_index=True, default='', max_length=128)),
+                ('description', models.TextField(blank=True, default='')),
+                ('reading_status', models.CharField(choices=[('want_to_read', 'Want to Read'), ('reading', 'Reading'), ('finished', 'Finished'), ('dnf', 'Did Not Finish')], db_index=True, default='want_to_read', max_length=20)),
+                ('total_pages', models.PositiveIntegerField(default=0)),
+                ('cover_image', models.URLField(blank=True, default='')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                'verbose_name': 'Book',
+                'verbose_name_plural': 'Books',
+                'db_table': 'books_book',
+                'ordering': ['title'],
+                'indexes': [models.Index(fields=['title', 'author', 'genre'], name='books_book_title_9fddc2_idx')],
+            },
+        ),
+        migrations.CreateModel(
+            name='EBook',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=512)),
+                ('author', models.CharField(blank=True, default='', max_length=256)),
+                ('file', models.FileField(upload_to='ebooks/%Y/%m/%d/')),
+                ('cover_image', models.ImageField(blank=True, null=True, upload_to='ebook_covers/%Y/%m/%d/')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='ebooks', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'E-Book',
+                'verbose_name_plural': 'E-Books',
+                'db_table': 'books_ebook',
+                'ordering': ['-created_at'],
+            },
+        ),
+        migrations.CreateModel(
+            name='ReadingProgress',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('current_position', models.FloatField(default=0.0)),
+                ('last_page', models.IntegerField(default=0)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('ebook', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='reading_progress', to='books.ebook')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='reading_progress', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name_plural': 'reading progress',
+                'db_table': 'books_reading_progress',
+            },
+        ),
+        migrations.CreateModel(
+            name='ReadingSettings',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('font_size', models.IntegerField(default=18)),
+                ('font_style', models.CharField(choices=[('sans-serif', 'Sans Serif'), ('serif', 'Serif'), ('monospace', 'Monospace')], default='sans-serif', max_length=20)),
+                ('background_color', models.CharField(choices=[('#ffffff', 'White'), ('#f4e4c1', 'Sepia'), ('#1a1a2e', 'Dark'), ('#c7edcc', 'Green')], default='#ffffff', max_length=7)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('user', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='reading_settings', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name_plural': 'reading settings',
+                'db_table': 'books_reading_settings',
+            },
+        ),
+        migrations.AddIndex(
+            model_name='ebook',
+            index=models.Index(fields=['user', '-created_at'], name='books_ebook_user_id_0b6bdb_idx'),
+        ),
+        migrations.AlterUniqueTogether(
+            name='readingprogress',
+            unique_together={('user', 'ebook')},
+        ),
+    ]

backend/apps/books/migrations/0002_ebook_file_size_ebook_format_ebook_metadata_json_and_more.py

@@ -0,0 +1,105 @@
+# Generated by Django 5.1.7 on 2026-06-03 22:21
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('books', '0001_initial'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='ebook',
+            name='file_size',
+            field=models.BigIntegerField(default=0),
+        ),
+        migrations.AddField(
+            model_name='ebook',
+            name='format',
+            field=models.CharField(blank=True, default='', editable=False, max_length=20),
+        ),
+        migrations.AddField(
+            model_name='ebook',
+            name='metadata_json',
+            field=models.JSONField(blank=True, default=dict),
+        ),
+        migrations.AddField(
+            model_name='ebook',
+            name='page_count',
+            field=models.PositiveIntegerField(default=0),
+        ),
+        migrations.AddField(
+            model_name='readingprogress',
+            name='device_id',
+            field=models.CharField(blank=True, default='', max_length=128),
+        ),
+        migrations.AddField(
+            model_name='readingprogress',
+            name='device_name',
+            field=models.CharField(blank=True, default='', max_length=128),
+        ),
+        migrations.AddField(
+            model_name='readingprogress',
+            name='version',
+            field=models.PositiveIntegerField(default=1),
+        ),
+        migrations.AlterField(
+            model_name='ebook',
+            name='author',
+            field=models.CharField(blank=True, db_index=True, default='', max_length=256),
+        ),
+        migrations.AlterField(
+            model_name='ebook',
+            name='title',
+            field=models.CharField(db_index=True, max_length=512),
+        ),
+        migrations.CreateModel(
+            name='BookChapter',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=512)),
+                ('index', models.IntegerField(default=0)),
+                ('href', models.CharField(blank=True, default='', max_length=1024)),
+                ('children', models.JSONField(blank=True, default=list)),
+                ('ebook', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='chapters', to='books.ebook')),
+            ],
+            options={
+                'verbose_name': 'Book Chapter',
+                'verbose_name_plural': 'Book Chapters',
+                'db_table': 'books_book_chapter',
+                'ordering': ['index'],
+            },
+        ),
+        migrations.CreateModel(
+            name='DownloadRecord',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('file_size', models.BigIntegerField(default=0)),
+                ('downloaded_at', models.DateTimeField(auto_now_add=True)),
+                ('ebook', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='download_records', to='books.ebook')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='download_records', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'Download Record',
+                'verbose_name_plural': 'Download Records',
+                'db_table': 'books_download_record',
+                'ordering': ['-downloaded_at'],
+            },
+        ),
+        migrations.DeleteModel(
+            name='ReadingSettings',
+        ),
+        migrations.AddIndex(
+            model_name='bookchapter',
+            index=models.Index(fields=['ebook', 'index'], name='books_book__ebook_i_464cd6_idx'),
+        ),
+        migrations.AlterUniqueTogether(
+            name='downloadrecord',
+            unique_together={('user', 'ebook')},
+        ),
+    ]

backend/apps/books/migrations/0003_readingprogress_epub_location.py

@@ -0,0 +1,16 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("books", "0002_ebook_file_size_ebook_format_ebook_metadata_json_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="readingprogress",
+            name="epub_location",
+            field=models.CharField(blank=True, default="", max_length=2048),
+        ),
+    ]

backend/apps/books/models.py

@@ -0,0 +1,156 @@
+from django.conf import settings
+from django.db import models
+from django.db.models.signals import post_delete
+from django.dispatch import receiver
+from pathlib import Path
+
+
+class ReadingStatus(models.TextChoices):
+    WANT_TO_READ = "want_to_read", "Want to Read"
+    READING = "reading", "Reading"
+    FINISHED = "finished", "Finished"
+    DNF = "dnf", "Did Not Finish"
+
+
+class Book(models.Model):
+    title = models.CharField(max_length=512, db_index=True)
+    author = models.CharField(max_length=256, blank=True, default="", db_index=True)
+    genre = models.CharField(max_length=128, blank=True, default="", db_index=True)
+    description = models.TextField(blank=True, default="")
+    reading_status = models.CharField(max_length=20, choices=ReadingStatus.choices, default=ReadingStatus.WANT_TO_READ, db_index=True)
+    total_pages = models.PositiveIntegerField(default=0)
+    cover_image = models.URLField(blank=True, default="")
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "books_book"
+        verbose_name = "Book"
+        verbose_name_plural = "Books"
+        ordering = ["title"]
+        indexes = [models.Index(fields=["title", "author", "genre"])]
+
+    def __str__(self):
+        return self.title
+
+
+class EBook(models.Model):
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="ebooks")
+    title = models.CharField(max_length=512, db_index=True)
+    author = models.CharField(max_length=256, blank=True, default="", db_index=True)
+    format = models.CharField(max_length=20, blank=True, default="", editable=False)
+    page_count = models.PositiveIntegerField(default=0)
+    file_size = models.BigIntegerField(default=0)
+    metadata_json = models.JSONField(blank=True, default=dict)
+    file = models.FileField(upload_to="ebooks/%Y/%m/%d/")
+    cover_image = models.ImageField(upload_to="ebook_covers/%Y/%m/%d/", blank=True, null=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "books_ebook"
+        verbose_name = "E-Book"
+        verbose_name_plural = "E-Books"
+        ordering = ["-created_at"]
+        indexes = [models.Index(fields=["user", "-created_at"])]
+
+    def __str__(self):
+        return self.title
+
+    def filename(self):
+        return Path(self.file.name).name if self.file else ""
+
+
+class BookChapter(models.Model):
+    ebook = models.ForeignKey(EBook, on_delete=models.CASCADE, related_name="chapters")
+    title = models.CharField(max_length=512)
+    index = models.IntegerField(default=0)
+    href = models.CharField(max_length=1024, blank=True, default="")
+    children = models.JSONField(blank=True, default=list)
+
+    class Meta:
+        db_table = "books_book_chapter"
+        verbose_name = "Book Chapter"
+        verbose_name_plural = "Book Chapters"
+        ordering = ["index"]
+        indexes = [models.Index(fields=["ebook", "index"])]
+
+    def __str__(self):
+        return f"{self.ebook.title} - {self.title}"
+
+
+@receiver(post_delete, sender=EBook)
+def _auto_delete_ebook_file(sender, instance, **kwargs):
+    if instance.file:
+        instance.file.delete(save=False)
+    if instance.cover_image:
+        instance.cover_image.delete(save=False)
+
+
+class DownloadRecord(models.Model):
+    """Tracks book downloads for offline access management."""
+
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="download_records")
+    ebook = models.ForeignKey(EBook, on_delete=models.CASCADE, related_name="download_records")
+    file_size = models.BigIntegerField(default=0)
+    downloaded_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = "books_download_record"
+        verbose_name = "Download Record"
+        verbose_name_plural = "Download Records"
+        ordering = ["-downloaded_at"]
+        unique_together = [("user", "ebook")]
+
+    def __str__(self):
+        return f"{self.user} - {self.ebook.title}"
+
+
+class ReadingProgress(models.Model):
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="reading_progress")
+    ebook = models.OneToOneField(EBook, on_delete=models.CASCADE, related_name="reading_progress")
+    current_position = models.FloatField(default=0.0)
+    last_page = models.IntegerField(default=0)
+    epub_location = models.CharField(max_length=2048, blank=True, default="")
+    device_id = models.CharField(max_length=128, blank=True, default="")
+    device_name = models.CharField(max_length=128, blank=True, default="")
+    version = models.PositiveIntegerField(default=1)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "books_reading_progress"
+        verbose_name_plural = "reading progress"
+        unique_together = [("user", "ebook")]
+
+    def __str__(self):
+        return f"{self.ebook.title} - {self.current_position:.1f}%"
+
+    def update_with_sync(self, position: float, last_page: int,
+                         device_id: str, device_name: str,
+                         client_updated_at: str | None = None) -> tuple["ReadingProgress", bool]:
+        """Update progress with conflict resolution (last-write-wins by timestamp).
+
+        Returns (instance, applied) where applied is True if the update was applied.
+        """
+        if client_updated_at and self.updated_at:
+            try:
+                from django.utils.timezone import is_naive, make_aware
+                from datetime import datetime
+                client_dt = datetime.fromisoformat(client_updated_at.replace("Z", "+00:00"))
+                if is_naive(client_dt):
+                    client_dt = make_aware(client_dt)
+                if client_dt <= self.updated_at:
+                    return self, False
+            except (ValueError, TypeError):
+                pass
+
+        self.current_position = position
+        self.last_page = last_page
+        self.device_id = device_id
+        self.device_name = device_name
+        self.version += 1
+        self.save(update_fields=[
+            "current_position", "last_page",
+            "device_id", "device_name", "version", "updated_at",
+        ])
+        return self, True

backend/apps/books/serializers.py

@@ -0,0 +1,231 @@
+from rest_framework import serializers
+
+import logging
+
+from apps.books.models import Book, BookChapter, EBook, ReadingProgress, ReadingStatus, DownloadRecord
+from apps.books.services.ebook_metadata import subjects_from_ebook
+from apps.books.services.metadata import enrich_ebook_metadata
+from apps.books.services.process_ebook import apply_processing_to_ebook
+from apps.reader.models import ReadingSettings
+
+logger = logging.getLogger(__name__)
+
+class BookReadingSettingsSerializer(serializers.ModelSerializer):
+    font_style = serializers.CharField(source="font_family")
+
+    class Meta:
+        model = ReadingSettings
+        fields = ["font_size", "font_style", "background_color"]
+
+    def validate_font_size(self, value: int) -> int:
+        if value < 12 or value > 36:
+            raise serializers.ValidationError("Font size must be between 12 and 36.")
+        return value
+
+
+class BookChapterSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = BookChapter
+        fields = ["id", "title", "index", "href", "children"]
+
+
+class EBookContentSerializer(serializers.Serializer):
+    page = serializers.IntegerField()
+    total_pages = serializers.IntegerField()
+    content = serializers.CharField()
+    chapter_title = serializers.CharField()
+    format = serializers.CharField()
+
+
+class EBookTocSerializer(serializers.Serializer):
+    chapters = serializers.ListField(child=BookChapterSerializer())
+    format = serializers.CharField()
+    page_count = serializers.IntegerField()
+
+
+class BookListSerializer(serializers.ModelSerializer):
+    reading_status_display = serializers.CharField(source="get_reading_status_display", read_only=True)
+
+    class Meta:
+        model = Book
+        fields = ["id", "title", "author", "genre", "reading_status", "reading_status_display", "cover_image"]
+
+
+class BookDetailSerializer(serializers.ModelSerializer):
+    reading_status_display = serializers.CharField(source="get_reading_status_display", read_only=True)
+
+    class Meta:
+        model = Book
+        fields = ["id", "title", "author", "genre", "description", "reading_status", "reading_status_display", "cover_image", "total_pages", "created_at", "updated_at"]
+        read_only_fields = ["id", "created_at", "updated_at"]
+
+
+class BookSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Book
+        fields = ["id", "title", "author", "genre", "description", "reading_status", "cover_image", "total_pages", "created_at", "updated_at"]
+        read_only_fields = ["id", "created_at", "updated_at"]
+
+
+class EBookListSerializer(serializers.ModelSerializer):
+    filename = serializers.CharField(read_only=True)
+    format = serializers.CharField(read_only=True)
+    progress = serializers.SerializerMethodField()
+    started = serializers.SerializerMethodField()
+    subjects = serializers.SerializerMethodField()
+
+    class Meta:
+        model = EBook
+        fields = [
+            "id", "title", "author", "filename", "format", "page_count", "file_size",
+            "cover_image", "created_at", "progress", "started", "subjects",
+        ]
+
+    def get_subjects(self, obj: EBook) -> list[str]:
+        return subjects_from_ebook(obj)
+
+    def get_progress(self, obj):
+        try:
+            return obj.reading_progress.current_position
+        except ReadingProgress.DoesNotExist:
+            return None
+
+    def get_started(self, obj):
+        """True when the user has opened the reader with saved progress."""
+        try:
+            rp = obj.reading_progress
+        except ReadingProgress.DoesNotExist:
+            return False
+        if rp.current_position >= 99:
+            return False
+        if obj.format == "pdf":
+            return rp.last_page > 0 or rp.current_position > 0
+        return bool((rp.epub_location or "").strip())
+
+
+class EBookDetailSerializer(serializers.ModelSerializer):
+    filename = serializers.CharField(read_only=True)
+    format = serializers.CharField(read_only=True)
+    file_url = serializers.SerializerMethodField()
+    progress = serializers.SerializerMethodField()
+    metadata = serializers.JSONField(source="metadata_json", read_only=True)
+
+    class Meta:
+        model = EBook
+        fields = [
+            "id", "title", "author", "filename", "format", "page_count", "file_size",
+            "file_url", "cover_image", "metadata", "created_at", "updated_at", "progress",
+        ]
+
+    def get_file_url(self, obj):
+        request = self.context.get("request")
+        if request and obj.file:
+            return request.build_absolute_uri(obj.file.url)
+        return ""
+
+    def get_progress(self, obj):
+        try:
+            rp = obj.reading_progress
+            return {
+                "current_position": rp.current_position,
+                "last_page": rp.last_page,
+                "epub_location": rp.epub_location,
+            }
+        except ReadingProgress.DoesNotExist:
+            return None
+
+
+class EBookUploadSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = EBook
+        fields = ["title", "author", "file", "cover_image"]
+        extra_kwargs = {"title": {"required": True}, "file": {"required": True}}
+
+    def validate_file(self, value):
+        import os
+        if value is None:
+            return value
+        ext = os.path.splitext(str(getattr(value, "name", "")))[1].lower()
+        if ext not in (".epub", ".pdf"):
+            raise serializers.ValidationError("Only EPUB and PDF files are supported.")
+        return value
+
+    def create(self, validated_data):
+        import os
+
+        validated_data["user"] = self.context["request"].user
+        name = str(getattr(validated_data.get("file"), "name", ""))
+        ext = os.path.splitext(name)[1].lower().lstrip(".")
+        if ext:
+            validated_data["format"] = ext
+        ebook = super().create(validated_data)
+        try:
+            apply_processing_to_ebook(ebook)
+        except Exception:
+            logger.exception("E-book processing failed for ebook %s", ebook.pk)
+        try:
+            enrich_ebook_metadata(ebook)
+        except Exception:
+            logger.exception("Metadata enrichment failed for ebook %s", ebook.pk)
+        ebook.refresh_from_db()
+        return ebook
+
+
+class ReadingProgressSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ReadingProgress
+        fields = [
+            "current_position", "last_page", "epub_location",
+            "device_id", "device_name", "version", "updated_at",
+        ]
+        read_only_fields = ["version", "updated_at"]
+        extra_kwargs = {"current_position": {"required": False, "min_value": 0.0, "max_value": 100.0}}
+
+    def validate_current_position(self, value):
+        if value < 0.0 or value > 100.0:
+            raise serializers.ValidationError("Position must be between 0.0 and 100.0.")
+        return value
+
+
+class DownloadRecordSerializer(serializers.ModelSerializer):
+    ebook_id = serializers.IntegerField(source="ebook.id", read_only=True)
+    ebook_title = serializers.CharField(source="ebook.title", read_only=True)
+    author = serializers.CharField(source="ebook.author", read_only=True)
+    filename = serializers.SerializerMethodField()
+    cover_image = serializers.ImageField(source="ebook.cover_image", read_only=True)
+    format = serializers.CharField(source="ebook.format", read_only=True)
+    progress = serializers.SerializerMethodField()
+    file_url = serializers.SerializerMethodField()
+
+    class Meta:
+        model = DownloadRecord
+        fields = [
+            "id", "ebook_id", "ebook_title", "author", "filename", "file_url",
+            "file_size", "cover_image", "format", "downloaded_at", "progress",
+        ]
+
+    def get_filename(self, obj):
+        return obj.ebook.filename()
+
+    def get_file_url(self, obj):
+        request = self.context.get("request")
+        if request and obj.ebook.file:
+            return request.build_absolute_uri(obj.ebook.file.url)
+        return ""
+
+    def get_progress(self, obj):
+        try:
+            rp = obj.ebook.reading_progress
+            return {
+                "current_position": rp.current_position,
+                "last_page": rp.last_page,
+                "epub_location": rp.epub_location,
+            }
+        except ReadingProgress.DoesNotExist:
+            return None
+
+
+class StorageSummarySerializer(serializers.Serializer):
+    total_downloads = serializers.IntegerField()
+    total_size_bytes = serializers.IntegerField()
+    ebooks = serializers.ListField(child=serializers.DictField())

backend/apps/books/services/ebook_metadata.py

@@ -0,0 +1,8 @@
+from __future__ import annotations
+
+from apps.books.models import EBook
+
+
+def subjects_from_ebook(ebook: EBook) -> list[str]:
+    ol = (ebook.metadata_json or {}).get("openlibrary") or {}
+    return [s.strip() for s in (ol.get("subjects") or []) if isinstance(s, str) and s.strip()]

backend/apps/books/services/metadata.py

@@ -0,0 +1,78 @@
+from __future__ import annotations
+
+import logging
+from datetime import datetime, timezone
+
+from django.core.files.base import ContentFile
+
+from apps.books.models import EBook
+from apps.books.services.openlibrary import (
+    HIGH_CONFIDENCE,
+    download_cover,
+    fetch_metadata,
+)
+
+logger = logging.getLogger(__name__)
+
+
+def enrich_ebook_metadata(ebook: EBook) -> EBook:
+    """Fetch Open Library metadata and update the ebook. Never raises to callers."""
+    user_title = ebook.title
+    user_author = ebook.author or ""
+
+    try:
+        result = fetch_metadata(user_title, user_author)
+    except Exception:
+        logger.exception("Open Library metadata fetch failed for ebook %s", ebook.pk)
+        return ebook
+
+    if result is None:
+        return ebook
+
+    now = datetime.now(timezone.utc).isoformat()
+    metadata = {
+        "source": "openlibrary",
+        "matched_at": now,
+        "match_language": result.match_language,
+        "match_score": result.match_score,
+        "match_status": result.match_status,
+        "user_input": {"title": user_title, "author": user_author},
+        "openlibrary": result.openlibrary,
+    }
+    ebook.metadata_json = metadata
+
+    update_fields = ["metadata_json", "updated_at"]
+
+    if result.match_status == "not_found":
+        ebook.save(update_fields=update_fields)
+        return ebook
+
+    ol = result.openlibrary
+    cover_id = ol.get("cover_id")
+
+    cover_missing = (
+        not ebook.cover_image
+        or not ebook.cover_image.name
+        or not ebook.cover_image.storage.exists(ebook.cover_image.name)
+    )
+    if cover_id and cover_missing:
+        if ebook.cover_image:
+            ebook.cover_image.delete(save=False)
+        cover_bytes = download_cover(int(cover_id))
+        if cover_bytes:
+            filename = f"ol_cover_{ebook.pk}_{cover_id}.jpg"
+            ebook.cover_image.save(filename, ContentFile(cover_bytes), save=False)
+            update_fields.append("cover_image")
+
+    if result.match_score >= HIGH_CONFIDENCE:
+        ol_title = ol.get("title")
+        ol_authors = ol.get("authors") or []
+        if ol_title:
+            ebook.title = ol_title[:512]
+            update_fields.append("title")
+        if ol_authors:
+            ebook.author = ol_authors[0][:256]
+            update_fields.append("author")
+
+    ebook.save(update_fields=list(dict.fromkeys(update_fields)))
+    return ebook

backend/apps/books/services/openlibrary.py

@@ -0,0 +1,304 @@
+from __future__ import annotations
+
+import logging
+import re
+import unicodedata
+from dataclasses import dataclass
+from difflib import SequenceMatcher
+from typing import Any
+
+import httpx
+from config.settings import settings
+
+logger = logging.getLogger(__name__)
+
+SEARCH_URL = "https://openlibrary.org/search.json"
+COVERS_URL = "https://covers.openlibrary.org/b/id/{cover_id}-{size}.jpg"
+SEARCH_FIELDS = (
+    "key,title,author_name,cover_i,first_publish_year,subject,language,"
+    "edition_key,number_of_pages_median,publisher"
+)
+
+HIGH_CONFIDENCE = 0.8
+LOW_CONFIDENCE = 0.6
+
+# EPUB release noise often copied from filenames, e.g. "Title [6494] (r2.3)"
+_TITLE_NOISE_PATTERNS = (
+    re.compile(r"\s*\[\d+\]"),  # [6494]
+    re.compile(r"\s*\([rv][\d.]+\)", re.IGNORECASE),  # (r2.3), (v1.0)
+    re.compile(r"\s*\(rev[\d.]*\)", re.IGNORECASE),  # (rev2)
+)
+
+
+def _sanitize_search_title(title: str) -> str:
+    cleaned = title.strip()
+    for pattern in _TITLE_NOISE_PATTERNS:
+        cleaned = pattern.sub("", cleaned)
+    return re.sub(r"\s+", " ", cleaned).strip()
+
+
+@dataclass(frozen=True)
+class OpenLibraryHit:
+    work_key: str
+    title: str
+    authors: list[str]
+    cover_id: int | None
+    first_publish_year: int | None
+    subjects: list[str]
+    languages: list[str]
+    publishers: list[str]
+    edition_key: str | None
+    number_of_pages_median: int | None
+    match_language: str
+    score: float
+
+
+@dataclass(frozen=True)
+class OpenLibraryMetadata:
+    match_language: str
+    match_score: float
+    match_status: str
+    openlibrary: dict[str, Any]
+
+
+def _normalize(text: str) -> str:
+    cleaned = re.sub(r"[^\w\s]", " ", _strip_accents(text).lower())
+    return re.sub(r"\s+", " ", cleaned).strip()
+
+
+def _strip_accents(text: str) -> str:
+    normalized = unicodedata.normalize("NFKD", text)
+    return "".join(ch for ch in normalized if not unicodedata.combining(ch))
+
+
+def _build_search_params(
+    title: str,
+    author: str,
+    *,
+    lang: str | None,
+    search_mode: str,
+) -> dict[str, str | int]:
+    title = title.strip()
+    author = author.strip()
+    params: dict[str, str | int] = {"limit": 10, "fields": SEARCH_FIELDS}
+
+    if search_mode == "spanish_q":
+        q_parts = ["language:spa", title]
+        if author:
+            q_parts.append(author)
+        params["q"] = " ".join(q_parts)
+    elif search_mode == "q":
+        params["q"] = " ".join(part for part in (title, author) if part)
+    elif search_mode == "q_unaccent":
+        params["q"] = " ".join(
+            part for part in (_strip_accents(title), _strip_accents(author) if author else "") if part
+        )
+    else:
+        params["title"] = title
+        if author:
+            params["author"] = author
+
+    if lang:
+        params["lang"] = lang
+    return params
+
+
+def _title_similarity(a: str, b: str) -> float:
+    na, nb = _normalize(a), _normalize(b)
+    if not na or not nb:
+        return 0.0
+    if na in nb or nb in na:
+        return 1.0
+    return SequenceMatcher(None, na, nb).ratio()
+
+
+def _author_overlap(user_author: str, ol_authors: list[str]) -> float:
+    if not user_author.strip():
+        return 0.5 if ol_authors else 0.0
+    user_tokens = set(_normalize(user_author).split())
+    if not user_tokens:
+        return 0.0
+    best = 0.0
+    for name in ol_authors:
+        name_tokens = set(_normalize(name).split())
+        if not name_tokens:
+            continue
+        overlap = len(user_tokens & name_tokens) / len(user_tokens)
+        best = max(best, overlap)
+        if user_tokens <= name_tokens or name_tokens <= user_tokens:
+            best = max(best, 0.95)
+    return best
+
+
+def _score_hit(title: str, author: str, doc: dict[str, Any], *, lang: str) -> float:
+    ol_title = doc.get("title") or ""
+    ol_authors = doc.get("author_name") or []
+    title_score = _title_similarity(title, ol_title)
+    author_score = _author_overlap(author, ol_authors)
+    combined = (title_score * 0.6) + (author_score * 0.4)
+    if doc.get("cover_i"):
+        combined += 0.05
+    return min(combined, 1.0)
+
+
+def _parse_hit(doc: dict[str, Any], *, lang: str, score: float) -> OpenLibraryHit:
+    edition_keys = doc.get("edition_key") or []
+    edition_key = edition_keys[0] if edition_keys else None
+    cover_id = doc.get("cover_i")
+    return OpenLibraryHit(
+        work_key=doc.get("key") or "",
+        title=doc.get("title") or "",
+        authors=list(doc.get("author_name") or []),
+        cover_id=int(cover_id) if cover_id else None,
+        first_publish_year=doc.get("first_publish_year"),
+        subjects=list(doc.get("subject") or [])[:10],
+        languages=list(doc.get("language") or []),
+        publishers=list(doc.get("publisher") or [])[:5],
+        edition_key=edition_key,
+        number_of_pages_median=doc.get("number_of_pages_median"),
+        match_language=lang,
+        score=score,
+    )
+
+
+def build_cover_url(cover_id: int, size: str = "L") -> str:
+    return COVERS_URL.format(cover_id=cover_id, size=size)
+
+
+def _client() -> httpx.Client:
+    read_timeout = settings.OPENLIBRARY_TIMEOUT_SECONDS
+    connect_timeout = settings.OPENLIBRARY_CONNECT_TIMEOUT_SECONDS
+    return httpx.Client(
+        timeout=httpx.Timeout(
+            connect=connect_timeout,
+            read=read_timeout,
+            write=read_timeout,
+            pool=connect_timeout,
+        ),
+        headers={"User-Agent": settings.OPENLIBRARY_USER_AGENT},
+        follow_redirects=True,
+    )
+
+
+def search_works(
+    title: str,
+    author: str,
+    *,
+    lang: str | None = None,
+    search_mode: str = "title",
+    client: httpx.Client | None = None,
+) -> list[OpenLibraryHit]:
+    if not title.strip():
+        return []
+
+    params = _build_search_params(title, author, lang=lang, search_mode=search_mode)
+
+    try:
+        if client is not None:
+            response = client.get(SEARCH_URL, params=params)
+            response.raise_for_status()
+            docs = response.json().get("docs") or []
+        else:
+            with _client() as owned_client:
+                response = owned_client.get(SEARCH_URL, params=params)
+                response.raise_for_status()
+                docs = response.json().get("docs") or []
+    except (httpx.HTTPError, ValueError) as exc:
+        logger.warning("Open Library search failed: %s", exc)
+        return []
+
+    hits: list[OpenLibraryHit] = []
+    for doc in docs:
+        score = _score_hit(title, author, doc, lang=lang or "")
+        if score < LOW_CONFIDENCE:
+            continue
+        hits.append(_parse_hit(doc, lang=lang or "", score=score))
+    hits.sort(key=lambda h: (h.score, h.cover_id is not None), reverse=True)
+    return hits
+
+
+def pick_best_match(title: str, author: str, hits: list[OpenLibraryHit]) -> OpenLibraryHit | None:
+    return hits[0] if hits else None
+
+
+def download_cover(cover_id: int) -> bytes | None:
+    url = build_cover_url(cover_id, size="L")
+    try:
+        with _client() as client:
+            response = client.get(url)
+            if response.status_code == 404:
+                return None
+            response.raise_for_status()
+            content_type = response.headers.get("content-type", "")
+            if not content_type.startswith("image/"):
+                return None
+            return response.content
+    except httpx.HTTPError as exc:
+        logger.warning("Open Library cover download failed for %s: %s", cover_id, exc)
+        return None
+
+
+def _hit_to_openlibrary_dict(hit: OpenLibraryHit) -> dict[str, Any]:
+    return {
+        "work_key": hit.work_key,
+        "edition_key": hit.edition_key,
+        "title": hit.title,
+        "authors": hit.authors,
+        "cover_id": hit.cover_id,
+        "cover_url": build_cover_url(hit.cover_id) if hit.cover_id else None,
+        "first_publish_year": hit.first_publish_year,
+        "subjects": hit.subjects,
+        "languages": hit.languages,
+        "publishers": hit.publishers,
+        "number_of_pages_median": hit.number_of_pages_median,
+    }
+
+
+def fetch_metadata(title: str, author: str) -> OpenLibraryMetadata | None:
+    if not settings.OPENLIBRARY_ENABLED:
+        return None
+
+    preferred = settings.OPENLIBRARY_PREFERRED_LANG
+    fallback = settings.OPENLIBRARY_FALLBACK_LANG
+    search_title = _sanitize_search_title(title)
+
+    if not search_title:
+        return OpenLibraryMetadata(
+            match_language=preferred,
+            match_score=0.0,
+            match_status="not_found",
+            openlibrary={},
+        )
+
+    search_plan: list[tuple[str, str | None]] = [
+        ("spanish_q", preferred),
+        ("title", preferred),
+        ("q", None),
+        ("q_unaccent", None),
+    ]
+    if fallback != preferred:
+        search_plan.extend([("title", fallback), ("q", fallback)])
+
+    hits: list[OpenLibraryHit] = []
+    with _client() as client:
+        for search_mode, lang in search_plan:
+            hits = search_works(search_title, author, lang=lang, search_mode=search_mode, client=client)
+            if hits:
+                break
+
+    hit = pick_best_match(title, author, hits)
+    if not hit:
+        return OpenLibraryMetadata(
+            match_language=preferred,
+            match_score=0.0,
+            match_status="not_found",
+            openlibrary={},
+        )
+
+    status = "matched" if hit.score >= HIGH_CONFIDENCE else "partial"
+    return OpenLibraryMetadata(
+        match_language=hit.match_language,
+        match_score=hit.score,
+        match_status=status,
+        openlibrary=_hit_to_openlibrary_dict(hit),
+    )

backend/apps/books/services/process_ebook.py

@@ -0,0 +1,239 @@
+"""Extract TOC, metadata, and page count from uploaded EPUB/PDF files."""
+
+from __future__ import annotations
+
+import logging
+import os
+from pathlib import Path
+from typing import Any
+
+from apps.books.models import BookChapter, EBook
+
+logger = logging.getLogger(__name__)
+
+
+def process_ebook(file_path: str, original_filename: str | None = None) -> dict[str, Any]:
+    """Parse an e-book file and return format, metadata, TOC, and page count."""
+    ext = Path(original_filename or file_path).suffix.lower()
+    if ext == ".epub" or file_path.lower().endswith(".epub"):
+        return _process_epub(file_path)
+    if ext == ".pdf" or file_path.lower().endswith(".pdf"):
+        return _process_pdf(file_path)
+    return {"format": ext.lstrip(".") or "unknown", "page_count": 0, "metadata": {}, "toc": []}
+
+
+def store_chapters(ebook: EBook, toc: list[dict[str, Any]], parent_index: int = 0) -> None:
+    """Recursively store TOC entries as BookChapter records."""
+    for idx, entry in enumerate(toc):
+        BookChapter.objects.create(
+            ebook=ebook,
+            title=entry.get("title", "Untitled"),
+            index=parent_index + idx,
+            href=entry.get("href", ""),
+            children=entry.get("children", []),
+        )
+        children = entry.get("children", [])
+        if children:
+            store_chapters(ebook, children, parent_index + idx + 1)
+
+
+def apply_processing_to_ebook(ebook: EBook) -> dict[str, Any]:
+    """Run processing on an EBook instance and persist chapters + metadata."""
+    if not ebook.file:
+        raise ValueError("No file found for this e-book.")
+
+    file_path = ebook.file.path
+    result = process_ebook(file_path, original_filename=ebook.filename())
+
+    ebook.format = result.get("format", ebook.format)
+    ebook.page_count = result.get("page_count", 0)
+    file_metadata = result.get("metadata") or {}
+    if file_metadata:
+        merged = dict(ebook.metadata_json or {})
+        merged["file"] = file_metadata
+        ebook.metadata_json = merged
+    ebook.save(update_fields=["format", "page_count", "metadata_json", "updated_at"])
+
+    raw_toc: list[dict[str, Any]] = result.get("toc", [])
+    BookChapter.objects.filter(ebook=ebook).delete()
+    store_chapters(ebook, raw_toc)
+
+    return {
+        "format": ebook.format,
+        "page_count": ebook.page_count,
+        "metadata": ebook.metadata_json,
+        "toc_count": len(raw_toc),
+        "status": "processed",
+    }
+
+
+def _process_epub(file_path: str) -> dict[str, Any]:
+    from ebooklib import epub, ITEM_DOCUMENT
+
+    book = epub.read_epub(file_path)
+    metadata = _extract_epub_metadata(book)
+    toc = _extract_epub_toc(book)
+
+    if not toc:
+        toc = _fallback_toc_from_spine(book, ITEM_DOCUMENT)
+
+    flat_count = _count_toc_entries(toc)
+    page_count = flat_count or len(book.spine)
+
+    return {
+        "format": "epub",
+        "page_count": page_count,
+        "metadata": metadata,
+        "toc": toc,
+    }
+
+
+def _process_pdf(file_path: str) -> dict[str, Any]:
+    from pypdf import PdfReader
+
+    reader = PdfReader(file_path)
+    page_count = len(reader.pages)
+    metadata = _extract_pdf_metadata(reader)
+    toc = _extract_pdf_outline(reader)
+    if not toc and page_count > 0:
+        toc = [
+            {"title": f"Page {i}", "href": f"pdf:page:{i}", "children": []}
+            for i in range(1, page_count + 1)
+        ]
+    return {
+        "format": "pdf",
+        "page_count": page_count,
+        "metadata": metadata,
+        "toc": toc,
+    }
+
+
+def _extract_pdf_metadata(reader) -> dict[str, Any]:
+    metadata: dict[str, Any] = {}
+    info = reader.metadata
+    if not info:
+        return metadata
+    title = getattr(info, "title", None)
+    author = getattr(info, "author", None)
+    if title:
+        metadata["title"] = str(title)
+    if author:
+        metadata["author"] = str(author)
+    return metadata
+
+
+def _extract_pdf_outline(reader) -> list[dict[str, Any]]:
+    outline = getattr(reader, "outline", None)
+    if not outline:
+        return []
+    return _walk_pdf_outline(reader, outline)
+
+
+def _walk_pdf_outline(reader, outline: list[Any]) -> list[dict[str, Any]]:
+    entries: list[dict[str, Any]] = []
+    i = 0
+    while i < len(outline):
+        item = outline[i]
+        if isinstance(item, list):
+            if entries:
+                entries[-1]["children"] = _walk_pdf_outline(reader, item)
+            i += 1
+            continue
+        title = getattr(item, "title", None) or "Section"
+        page_num = 1
+        try:
+            page_num = reader.get_destination_page_number(item) + 1
+        except Exception:
+            logger.debug("Could not resolve PDF outline destination", exc_info=True)
+        entries.append({
+            "title": str(title),
+            "href": f"pdf:page:{page_num}",
+            "children": [],
+        })
+        i += 1
+    return entries
+
+
+def _extract_epub_metadata(book) -> dict[str, Any]:
+    metadata: dict[str, Any] = {}
+
+    def first(namespace: str, name: str) -> str:
+        values = book.get_metadata(namespace, name)
+        if values:
+            return str(values[0][0])
+        return ""
+
+    title = first("DC", "title")
+    if title:
+        metadata["title"] = title
+    creator = first("DC", "creator")
+    if creator:
+        metadata["author"] = creator
+    language = first("DC", "language")
+    if language:
+        metadata["language"] = language
+    identifier = first("DC", "identifier")
+    if identifier:
+        metadata["identifier"] = identifier
+    return metadata
+
+
+def _parse_toc_item(item) -> dict[str, Any]:
+    from ebooklib import epub
+
+    if isinstance(item, epub.Link):
+        return {
+            "title": item.title or "Untitled",
+            "href": item.href or "",
+            "children": [],
+        }
+    if isinstance(item, tuple):
+        section, children = item
+        entry = {
+            "title": getattr(section, "title", None) or "Untitled",
+            "href": getattr(section, "href", None) or "",
+            "children": [],
+        }
+        for child in children:
+            entry["children"].append(_parse_toc_item(child))
+        return entry
+    if hasattr(item, "title"):
+        return {
+            "title": item.title or "Untitled",
+            "href": getattr(item, "href", "") or "",
+            "children": [],
+        }
+    return {"title": "Untitled", "href": "", "children": []}
+
+
+def _extract_epub_toc(book) -> list[dict[str, Any]]:
+    return [_parse_toc_item(item) for item in book.toc]
+
+
+def _fallback_toc_from_spine(book, item_document_type) -> list[dict[str, Any]]:
+    toc: list[dict[str, Any]] = []
+    seen: set[str] = set()
+    chapter_num = 0
+
+    for spine_entry in book.spine:
+        item_id = spine_entry[0] if isinstance(spine_entry, tuple) else spine_entry
+        item = book.get_item_with_id(item_id)
+        if not item or item.get_type() != item_document_type:
+            continue
+        href = item.get_name() or ""
+        if not href or href in seen:
+            continue
+        seen.add(href)
+        chapter_num += 1
+        title = os.path.splitext(os.path.basename(href))[0] or f"Chapter {chapter_num}"
+        toc.append({"title": title.replace("_", " ").replace("-", " "), "href": href, "children": []})
+
+    return toc
+
+
+def _count_toc_entries(toc: list[dict[str, Any]]) -> int:
+    count = 0
+    for entry in toc:
+        count += 1
+        count += _count_toc_entries(entry.get("children", []))
+    return count

backend/apps/books/tests.py

@@ -0,0 +1,255 @@
+"""Tests for the Book search & discovery endpoints."""
+
+import pytest
+from django.urls import reverse
+from rest_framework import status
+from rest_framework.test import APIClient
+
+from apps.books.models import Book, ReadingStatus
+
+
+# ---------------------------------------------------------------------------
+# Fixtures
+# ---------------------------------------------------------------------------
+
+
+@pytest.fixture
+def api_client():
+    return APIClient()
+
+
+@pytest.fixture
+def user(django_user_model):
+    return django_user_model.objects.create_user(
+        email="reader@example.com",
+        password="testpass123",
+    )
+
+
+@pytest.fixture
+def auth_client(api_client, user):
+    api_client.force_authenticate(user=user)
+    return api_client
+
+
+@pytest.fixture
+def books():
+    books_data = [
+        Book.objects.create(
+            title="Dune",
+            author="Frank Herbert",
+            genre="Science Fiction",
+            reading_status=ReadingStatus.FINISHED,
+            total_pages=688,
+            description="A desert planet saga.",
+        ),
+        Book.objects.create(
+            title="Neuromancer",
+            author="William Gibson",
+            genre="Science Fiction",
+            reading_status=ReadingStatus.READING,
+            total_pages=271,
+            description="Cyberpunk classic.",
+        ),
+        Book.objects.create(
+            title="The Hobbit",
+            author="J.R.R. Tolkien",
+            genre="Fantasy",
+            reading_status=ReadingStatus.WANT_TO_READ,
+            total_pages=310,
+            description="A hobbit's adventure.",
+        ),
+        Book.objects.create(
+            title="1984",
+            author="George Orwell",
+            genre="Dystopian",
+            reading_status=ReadingStatus.FINISHED,
+            total_pages=328,
+            description="Big Brother is watching.",
+        ),
+    ]
+    return books_data
+
+
+# ---------------------------------------------------------------------------
+# Search tests
+# ---------------------------------------------------------------------------
+
+
+@pytest.mark.django_db
+class TestBookSearch:
+    """Verify the search endpoint returns correct results."""
+
+    def test_search_by_title(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"q": "Dune"})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert "Dune" in titles
+        assert "Neuromancer" not in titles
+
+    def test_search_by_author(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"q": "Tolkien"})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert "The Hobbit" in titles
+
+    def test_search_by_genre(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"q": "Fantasy"})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert "The Hobbit" in titles
+
+    def test_search_case_insensitive(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"q": "dune"})
+        assert response.status_code == status.HTTP_200_OK
+        assert any(b["title"] == "Dune" for b in response.data["results"])
+
+    def test_search_partial_match(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"q": "Neu"})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert "Neuromancer" in titles
+
+    def test_search_empty_query_returns_all(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"q": ""})
+        assert response.status_code == status.HTTP_200_OK
+        assert len(response.data["results"]) == 4
+
+    def test_search_no_results(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"q": "zzzznotfound"})
+        assert response.status_code == status.HTTP_200_OK
+        assert len(response.data["results"]) == 0
+
+
+# ---------------------------------------------------------------------------
+# Filter tests
+# ---------------------------------------------------------------------------
+
+
+@pytest.mark.django_db
+class TestBookFilters:
+    """Verify filters for genre, author, and reading_status."""
+
+    def test_filter_by_genre(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"genre": "Science Fiction"})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert "Dune" in titles
+        assert "Neuromancer" in titles
+        assert "The Hobbit" not in titles
+
+    def test_filter_by_author(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"author": "George Orwell"})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert "1984" in titles
+        assert "Dune" not in titles
+
+    def test_filter_by_reading_status(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"reading_status": ReadingStatus.FINISHED})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert "Dune" in titles
+        assert "1984" in titles
+        assert "Neuromancer" not in titles
+        assert "The Hobbit" not in titles
+
+    def test_filter_combined_with_search(self, auth_client, books):
+        """Search + filter should intersect results."""
+        url = reverse("book-list")
+        response = auth_client.get(url, {"q": "Dune", "reading_status": ReadingStatus.FINISHED})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert "Dune" in titles
+        # 1984 matches reading_status but not search
+        assert "1984" not in titles
+
+
+# ---------------------------------------------------------------------------
+# Discovery endpoints
+# ---------------------------------------------------------------------------
+
+
+@pytest.mark.django_db
+class TestBookDiscovery:
+    """Verify genre and author discovery endpoints."""
+
+    def test_genres_endpoint(self, auth_client, books):
+        url = reverse("book-genres")
+        response = auth_client.get(url)
+        assert response.status_code == status.HTTP_200_OK
+        assert isinstance(response.data, list)
+        assert "Science Fiction" in response.data
+        assert "Fantasy" in response.data
+        assert "Dystopian" in response.data
+        # No duplicate genres
+        assert response.data.count("Science Fiction") == 1
+
+    def test_authors_endpoint(self, auth_client, books):
+        url = reverse("book-authors")
+        response = auth_client.get(url)
+        assert response.status_code == status.HTTP_200_OK
+        assert isinstance(response.data, list)
+        assert "Frank Herbert" in response.data
+        assert "J.R.R. Tolkien" in response.data
+
+    def test_genres_requires_auth(self, api_client, books):
+        url = reverse("book-genres")
+        response = api_client.get(url)
+        assert response.status_code == status.HTTP_401_UNAUTHORIZED
+
+    def test_authors_requires_auth(self, api_client, books):
+        url = reverse("book-authors")
+        response = api_client.get(url)
+        assert response.status_code == status.HTTP_401_UNAUTHORIZED
+
+
+# ---------------------------------------------------------------------------
+# Detail view
+# ---------------------------------------------------------------------------
+
+
+@pytest.mark.django_db
+class TestBookDetail:
+    """Verify the book detail endpoint."""
+
+    def test_retrieve_book(self, auth_client, books):
+        book = books[0]
+        url = reverse("book-detail", kwargs={"pk": book.pk})
+        response = auth_client.get(url)
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["title"] == "Dune"
+        assert response.data["author"] == "Frank Herbert"
+        assert response.data["description"] == "A desert planet saga."
+        assert response.data["total_pages"] == 688
+
+    def test_retrieve_nonexistent_returns_404(self, auth_client, books):
+        url = reverse("book-detail", kwargs={"pk": 99999})
+        response = auth_client.get(url)
+        assert response.status_code == status.HTTP_404_NOT_FOUND
+
+    def test_pagination(self, auth_client, books):
+        """List with small page size should paginate."""
+        url = reverse("book-list")
+        response = auth_client.get(f"{url}?page_size=2")
+        assert response.status_code == status.HTTP_200_OK
+        assert "count" in response.data
+        assert "results" in response.data
+        assert response.data["count"] == 4
+
+    def test_ordering(self, auth_client, books):
+        url = reverse("book-list")
+        response = auth_client.get(url, {"ordering": "title"})
+        assert response.status_code == status.HTTP_200_OK
+        titles = [b["title"] for b in response.data["results"]]
+        assert titles == sorted(titles)

backend/apps/books/urls.py

@@ -0,0 +1,13 @@
+from django.urls import include, path
+from rest_framework.routers import DefaultRouter
+
+from apps.books.views import BookViewSet, EBookViewSet, book_reading_settings_view
+
+router = DefaultRouter()
+router.register(r"ebooks", EBookViewSet, basename="ebook")
+router.register(r"", BookViewSet, basename="book")
+
+urlpatterns = [
+    path("settings/", book_reading_settings_view, name="book-settings"),
+    path("", include(router.urls)),
+]

backend/apps/books/views.py

@@ -0,0 +1,326 @@
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+from django.db.models import QuerySet, Q
+from django.http import FileResponse
+from django_filters.rest_framework import DjangoFilterBackend
+from rest_framework import parsers, permissions, status, viewsets
+from rest_framework.decorators import action, api_view, permission_classes
+from rest_framework.filters import OrderingFilter, SearchFilter
+from rest_framework.permissions import AllowAny, IsAuthenticated
+from rest_framework.request import Request
+from rest_framework.response import Response
+
+from apps.books.models import Book, BookChapter, DownloadRecord, EBook, ReadingProgress
+from apps.books.serializers import (
+    BookChapterSerializer, BookDetailSerializer, BookListSerializer, BookReadingSettingsSerializer,
+    BookSerializer, DownloadRecordSerializer, EBookContentSerializer, EBookDetailSerializer,
+    EBookListSerializer, EBookTocSerializer, EBookUploadSerializer,
+    ReadingProgressSerializer, StorageSummarySerializer,
+)
+from apps.reader.models import ReadingSettings
+from apps.books.services.ebook_metadata import subjects_from_ebook
+from apps.books.services.metadata import enrich_ebook_metadata
+
+logger = logging.getLogger(__name__)
+
+
+class BookViewSet(viewsets.ModelViewSet):
+    queryset = Book.objects.all()
+    permission_classes = [IsAuthenticated]
+    filter_backends = [DjangoFilterBackend, SearchFilter, OrderingFilter]
+    filterset_fields = ["author", "genre", "reading_status"]
+    search_fields = ["title", "author", "genre"]
+    ordering_fields = ["title", "author", "genre", "created_at"]
+    ordering = ["title"]
+
+    def get_serializer_class(self):
+        if self.action == "retrieve":
+            return BookDetailSerializer
+        if self.action == "list":
+            return BookListSerializer
+        return BookSerializer
+
+    def get_queryset(self) -> QuerySet[Book]:
+        qs = super().get_queryset()
+        query = self.request.query_params.get("q", "").strip()
+        if query:
+            qs = qs.filter(Q(title__icontains=query) | Q(author__icontains=query) | Q(genre__icontains=query))
+        return qs
+
+    @action(detail=False, methods=["get"], permission_classes=[AllowAny])
+    def genres(self, request: Request) -> Response:
+        genre_list = Book.objects.values_list("genre", flat=True).distinct().order_by("genre")
+        return Response([g for g in genre_list if g])
+
+    @action(detail=False, methods=["get"], permission_classes=[AllowAny])
+    def authors(self, request: Request) -> Response:
+        author_list = Book.objects.values_list("author", flat=True).distinct().order_by("author")
+        return Response([a for a in author_list if a])
+
+    @action(detail=False, methods=["get"])
+    def storage(self, request: Request) -> Response:
+        """Return storage usage summary for the current user."""
+        download_records = DownloadRecord.objects.filter(user=request.user).select_related("ebook")
+        total_size = sum(r.file_size for r in download_records)
+        ebook_list = [
+            {"id": r.ebook.id, "title": r.ebook.title, "file_size": r.file_size}
+            for r in download_records
+        ]
+        serializer = StorageSummarySerializer(data={
+            "total_downloads": download_records.count(),
+            "total_size_bytes": total_size,
+            "ebooks": ebook_list,
+        })
+        serializer.is_valid(raise_exception=True)
+        return Response(serializer.data)
+
+
+class IsEBookOwner(permissions.BasePermission):
+    def has_object_permission(self, request: Request, view: object, obj: EBook) -> bool:
+        return obj.user == request.user
+
+
+class EBookViewSet(viewsets.ModelViewSet):
+    parser_classes = [parsers.MultiPartParser, parsers.FormParser, parsers.JSONParser]
+    permission_classes = [IsAuthenticated, IsEBookOwner]
+
+    def get_serializer_class(self):
+        if self.action == "create":
+            return EBookUploadSerializer
+        if self.action in ("list",):
+            return EBookListSerializer
+        if self.action in ("toc",):
+            return BookChapterSerializer
+        return EBookDetailSerializer
+
+    def get_queryset(self):
+        qs = EBook.objects.filter(user=self.request.user).select_related("reading_progress", "user")
+        query = self.request.query_params.get("q", "").strip()
+        if query and self.action == "list":
+            qs = qs.filter(
+                Q(title__icontains=query) | Q(author__icontains=query),
+            )
+        return qs
+
+    @action(detail=False, methods=["get"])
+    def genres(self, request: Request) -> Response:
+        genre_set: set[str] = set()
+        for ebook in self.get_queryset():
+            genre_set.update(subjects_from_ebook(ebook))
+        return Response(sorted(genre_set))
+
+    @action(detail=False, methods=["get"])
+    def authors(self, request: Request) -> Response:
+        author_list = (
+            self.get_queryset()
+            .values_list("author", flat=True)
+            .distinct()
+            .order_by("author")
+        )
+        return Response([a for a in author_list if a])
+
+    @action(detail=True, methods=["get", "patch"])
+    def progress(self, request: Request, pk: int | None = None) -> Response:
+        ebook = self.get_object()
+        progress_obj, _created = ReadingProgress.objects.get_or_create(user=request.user, ebook=ebook)
+        if request.method == "GET":
+            serializer = ReadingProgressSerializer(progress_obj)
+            return Response(serializer.data)
+        serializer = ReadingProgressSerializer(progress_obj, data=request.data, partial=True)
+        serializer.is_valid(raise_exception=True)
+        serializer.save()
+        return Response(serializer.data)
+
+    @action(detail=True, methods=["post"], url_path="enrich-metadata")
+    def enrich_metadata(self, request: Request, pk: int | None = None) -> Response:
+        """Re-fetch Open Library metadata and cover for this ebook."""
+        ebook = self.get_object()
+        try:
+            enrich_ebook_metadata(ebook)
+        except Exception:
+            logger.exception("Manual metadata enrichment failed for ebook %s", ebook.id)
+            return Response(
+                {"error": "Metadata enrichment failed."},
+                status=status.HTTP_502_BAD_GATEWAY,
+            )
+        ebook.refresh_from_db()
+        serializer = EBookDetailSerializer(ebook, context={"request": request})
+        return Response(serializer.data)
+
+    @action(detail=True, methods=["post"])
+    def process(self, request: Request, pk: int | None = None) -> Response:
+        """Trigger e-book processing: metadata extraction, TOC building, page counting."""
+        ebook = self.get_object()
+        if not ebook.file:
+            return Response({"error": "No file found for this e-book."}, status=status.HTTP_400_BAD_REQUEST)
+
+        try:
+            from apps.books.services.process_ebook import apply_processing_to_ebook
+
+            result = apply_processing_to_ebook(ebook)
+            return Response(result)
+        except Exception as exc:
+            logger.exception("Failed to process ebook %s", ebook.id)
+            return Response({"error": f"Processing failed: {exc}"}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+    @action(detail=True, methods=["get"])
+    def file(self, request: Request, pk: int | None = None) -> FileResponse | Response:
+        """Stream the ebook file for authenticated in-browser reading."""
+        ebook = self.get_object()
+        content_types = {
+            "epub": "application/epub+zip",
+            "pdf": "application/pdf",
+        }
+        content_type = content_types.get(ebook.format)
+        if not content_type:
+            return Response(
+                {"error": "Unsupported format for in-browser reading."},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        if not ebook.file:
+            return Response({"error": "No file found for this e-book."}, status=status.HTTP_400_BAD_REQUEST)
+        return FileResponse(
+            ebook.file.open("rb"),
+            content_type=content_type,
+            filename=ebook.filename(),
+        )
+
+    @action(detail=True, methods=["get"])
+    def toc(self, request: Request, pk: int | None = None) -> Response:
+        """Return hierarchical table of contents."""
+        ebook = self.get_object()
+        chapters = BookChapter.objects.filter(ebook=ebook).order_by("index").select_related("ebook")
+        serializer = BookChapterSerializer(chapters, many=True)
+        return Response({
+            "chapters": serializer.data,
+            "format": ebook.format,
+            "page_count": ebook.page_count,
+        })
+
+    @action(detail=True, methods=["get"])
+    def content(self, request: Request, pk: int | None = None) -> Response:
+        """Return paginated content for a given page number.
+
+        Query params:
+            page (int): page/chapter index to fetch (1-indexed, default: 1)
+        """
+        ebook = self.get_object()
+        page = max(1, int(request.query_params.get("page", 1)))
+
+        chapters = list(BookChapter.objects.filter(ebook=ebook).order_by("index").select_related("ebook"))
+        total_pages = len(chapters) or ebook.page_count or 1
+
+        chapter: BookChapter | None = None
+        chapter_title = ""
+        content_html = ""
+
+        if chapters and 0 <= page - 1 < len(chapters):
+            ch = chapters[page - 1]
+            chapter_title = ch.title
+            content_html = _fetch_chapter_content(ebook, ch)
+
+        serializer = EBookContentSerializer(data={
+            "page": page,
+            "total_pages": total_pages,
+            "content": content_html,
+            "chapter_title": chapter_title,
+            "format": ebook.format,
+        })
+        serializer.is_valid(raise_exception=True)
+        return Response(serializer.data)
+
+    @action(detail=True, methods=["post"])
+    def download(self, request: Request, pk: int | None = None) -> Response:
+        """Track download of an e-book. Creates a DownloadRecord and returns file info."""
+        ebook = self.get_object()
+        if not ebook.file:
+            return Response({"error": "No file found for this e-book."}, status=status.HTTP_400_BAD_REQUEST)
+
+        download, created = DownloadRecord.objects.get_or_create(
+            user=request.user,
+            ebook=ebook,
+            defaults={"file_size": ebook.file.size if ebook.file else 0},
+        )
+        if not created:
+            download.file_size = ebook.file.size if ebook.file else 0
+            download.save(update_fields=["file_size"])
+
+        serializer = DownloadRecordSerializer(download, context={"request": request})
+        return Response(serializer.data, status=status.HTTP_200_OK)
+
+    @action(detail=False, methods=["get"])
+    def downloads(self, request: Request) -> Response:
+        """List all e-books the current user has downloaded."""
+        records = DownloadRecord.objects.filter(user=request.user).select_related(
+            "ebook", "ebook__reading_progress"
+        ).prefetch_related("ebook__chapters")
+        page = self.paginate_queryset(records)
+        if page is not None:
+            serializer = DownloadRecordSerializer(page, many=True, context={"request": request})
+            return self.get_paginated_response(serializer.data)
+        serializer = DownloadRecordSerializer(records, many=True, context={"request": request})
+        return Response(serializer.data)
+
+    @action(detail=False, methods=["delete"], url_path="downloads/(?P<download_pk>[^/.]+)")
+    def delete_download(self, request: Request, download_pk: str | None = None) -> Response:
+        """Delete a download record."""
+        try:
+            download = DownloadRecord.objects.get(pk=download_pk, user=request.user)
+        except DownloadRecord.DoesNotExist:
+            return Response({"error": "Download record not found."}, status=status.HTTP_404_NOT_FOUND)
+        download.delete()
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+
+def _fetch_chapter_content(ebook: EBook, chapter: BookChapter) -> str:
+    """Fetch HTML content for a chapter from the e-book file."""
+    if ebook.format == "epub":
+        return _fetch_epub_chapter_content(ebook.file.path, chapter)
+    return ""
+
+
+def _fetch_epub_chapter_content(file_path: str, chapter: BookChapter) -> str:
+    """Extract HTML content of a specific EPUB chapter by href."""
+    try:
+        from ebooklib import epub
+        from bs4 import BeautifulSoup
+    except ImportError:
+        return ""
+
+    try:
+        book = epub.read_epub(file_path)
+        href = chapter.href or ""
+        # Find the item by href
+        for item in book.get_items():
+            item_name = item.get_name() or ""
+            if href and (item_name.endswith(href) or href.endswith(item_name)):
+                content = item.get_content()
+                soup = BeautifulSoup(content, "html.parser")
+                # Clean up — remove body/html/head wrappers, keep inner content
+                body = soup.find("body")
+                if body:
+                    return str(body)
+                return str(soup)
+        return ""
+    except Exception:
+        logger.exception("Failed to fetch EPUB chapter content for %s", chapter.href)
+        return ""
+
+
+@api_view(["GET", "PATCH"])
+@permission_classes([IsAuthenticated])
+def book_reading_settings_view(request: Request) -> Response:
+    """Get or update reading settings via the books API contract."""
+    settings, _created = ReadingSettings.objects.get_or_create(user=request.user)
+
+    if request.method == "GET":
+        serializer = BookReadingSettingsSerializer(settings)
+        return Response(serializer.data)
+
+    serializer = BookReadingSettingsSerializer(settings, data=request.data, partial=True)
+    serializer.is_valid(raise_exception=True)
+    serializer.save()
+    return Response(serializer.data)

backend/apps/collections/admin.py

@@ -1,10 +0,0 @@
-from django.contrib import admin
-
-from .models import Collection
-
-
-@admin.register(Collection)
-class CollectionAdmin(admin.ModelAdmin):
-    list_display = ["name", "owner", "document_count", "is_public", "created_at"]
-    list_filter = ["is_public"]
-    search_fields = ["name", "description"]

backend/apps/collections/models.py

@@ -1,39 +0,0 @@
-from django.conf import settings
-from django.db import models
-
-
-class Collection(models.Model):
-    """A user-created collection of documents."""
-    name = models.CharField(max_length=300)
-    description = models.TextField(blank=True, default="")
-    cover = models.ImageField(upload_to="collection_covers/", blank=True, null=True)
-    documents = models.ManyToManyField(
-        "documents.Document",
-        related_name="collections",
-        blank=True,
-    )
-    is_public = models.BooleanField(default=False)
-    owner = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="collections",
-    )
-    created_at = models.DateTimeField(auto_now_add=True)
-    updated_at = models.DateTimeField(auto_now=True)
-
-    class Meta:
-        db_table = "collections_collection"
-        ordering = ["-updated_at"]
-
-    def __str__(self) -> str:
-        return self.name
-
-    @property
-    def document_count(self) -> int:
-        return self.documents.count()
-
-    @property
-    def cover_url(self) -> str | None:
-        if self.cover:
-            return self.cover.url
-        return None

backend/apps/collections/serializers.py

@@ -1,33 +0,0 @@
-from rest_framework import serializers
-
-from .models import Collection
-
-
-class CollectionSerializer(serializers.ModelSerializer[Collection]):
-    cover_url = serializers.SerializerMethodField()
-    document_count = serializers.IntegerField(read_only=True)
-
-    class Meta:
-        model = Collection
-        fields = [
-            "id", "name", "description", "cover_url", "document_count",
-            "is_public", "created_at", "updated_at",
-        ]
-        read_only_fields = ["id", "document_count", "created_at", "updated_at"]
-
-    def get_cover_url(self, obj: Collection) -> str | None:
-        return obj.cover_url
-
-
-class CollectionDetailSerializer(CollectionSerializer):
-    documents = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
-
-    class Meta(CollectionSerializer.Meta):
-        fields = CollectionSerializer.Meta.fields + ["documents", "owner"]
-
-
-class CollectionDocumentActionSerializer(serializers.Serializer):
-    document_ids = serializers.ListField(
-        child=serializers.IntegerField(),
-        allow_empty=False,
-    )

backend/apps/collections/urls.py

@@ -1,13 +0,0 @@
-from django.urls import include, path
-from rest_framework.routers import DefaultRouter
-
-from . import views
-
-router = DefaultRouter()
-router.register("", views.CollectionViewSet, basename="collection")
-
-app_name = "collections"
-
-urlpatterns = [
-    path("", include(router.urls)),
-]

backend/apps/collections/views.py

@@ -1,50 +0,0 @@
-from rest_framework import permissions, status, viewsets
-from rest_framework.decorators import action
-from rest_framework.response import Response
-
-from apps.documents.models import Document
-
-from .models import Collection
-from .serializers import (
-    CollectionDetailSerializer,
-    CollectionDocumentActionSerializer,
-    CollectionSerializer,
-)
-
-
-class CollectionViewSet(viewsets.ModelViewSet):
-    """CRUD for user collections."""
-    permission_classes = [permissions.IsAuthenticated]
-
-    def get_serializer_class(self):
-        if self.action in ("retrieve", "update", "partial_update"):
-            return CollectionDetailSerializer
-        return CollectionSerializer
-
-    def get_queryset(self):
-        return Collection.objects.filter(owner=self.request.user).prefetch_related("documents")
-
-    def perform_create(self, serializer):
-        serializer.save(owner=self.request.user)
-
-    @action(detail=True, methods=["post"])
-    def add_documents(self, request, pk=None):
-        """Add documents to a collection."""
-        collection = self.get_object()
-        serializer = CollectionDocumentActionSerializer(data=request.data)
-        serializer.is_valid(raise_exception=True)
-        docs = Document.objects.filter(
-            id__in=serializer.validated_data["document_ids"],
-            owner=request.user,
-        )
-        collection.documents.add(*docs)
-        return Response({"detail": f"Added {docs.count()} document(s)."}, status=status.HTTP_200_OK)
-
-    @action(detail=True, methods=["post"])
-    def remove_documents(self, request, pk=None):
-        """Remove documents from a collection."""
-        collection = self.get_object()
-        serializer = CollectionDocumentActionSerializer(data=request.data)
-        serializer.is_valid(raise_exception=True)
-        collection.documents.remove(*serializer.validated_data["document_ids"])
-        return Response({"detail": "Documents removed."}, status=status.HTTP_200_OK)

backend/apps/documents/admin.py

@@ -1,11 +0,0 @@
-from django.contrib import admin
-
-from .models import Document
-
-
-@admin.register(Document)
-class DocumentAdmin(admin.ModelAdmin):
-    list_display = ["title", "author", "file_type", "file_size", "is_public", "owner", "uploaded_at"]
-    list_filter = ["file_type", "is_public"]
-    search_fields = ["title", "author", "description"]
-    date_hierarchy = "uploaded_at"

backend/apps/documents/models.py

@@ -1,48 +0,0 @@
-from django.conf import settings
-from django.db import models
-
-
-class Document(models.Model):
-    """A digital document (ebook, PDF, etc.) uploaded by a user."""
-
-    class FileType(models.TextChoices):
-        PDF = "pdf", "PDF"
-        EPUB = "epub", "EPUB"
-        MOBI = "mobi", "MOBI"
-        TXT = "txt", "Plain Text"
-        DOCX = "docx", "Word Document"
-
-    title = models.CharField(max_length=500)
-    author = models.CharField(max_length=300, blank=True, null=True)
-    description = models.TextField(blank=True, default="")
-    cover = models.ImageField(upload_to="covers/", blank=True, null=True)
-    file = models.FileField(upload_to="documents/")
-    file_type = models.CharField(max_length=10, choices=FileType.choices)
-    file_size = models.PositiveIntegerField(help_text="File size in bytes")
-    page_count = models.PositiveIntegerField(blank=True, null=True)
-    tags = models.JSONField(default=list, blank=True)
-    is_public = models.BooleanField(default=False)
-    owner = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="documents",
-    )
-    uploaded_at = models.DateTimeField(auto_now_add=True)
-    updated_at = models.DateTimeField(auto_now=True)
-
-    class Meta:
-        db_table = "documents_document"
-        ordering = ["-uploaded_at"]
-        indexes = [
-            models.Index(fields=["owner", "-uploaded_at"]),
-            models.Index(fields=["file_type"]),
-        ]
-
-    def __str__(self) -> str:
-        return self.title
-
-    @property
-    def cover_url(self) -> str | None:
-        if self.cover:
-            return self.cover.url
-        return None

backend/apps/documents/serializers.py

@@ -1,41 +0,0 @@
-from rest_framework import serializers
-
-from .models import Document
-
-
-class DocumentListSerializer(serializers.ModelSerializer[Document]):
-    cover_url = serializers.SerializerMethodField()
-
-    class Meta:
-        model = Document
-        fields = [
-            "id", "title", "author", "cover_url", "description",
-            "file_type", "file_size", "page_count", "tags",
-            "is_public", "uploaded_at", "updated_at",
-        ]
-        read_only_fields = ["id", "uploaded_at", "updated_at"]
-
-    def get_cover_url(self, obj: Document) -> str | None:
-        return obj.cover_url
-
-
-class DocumentDetailSerializer(DocumentListSerializer):
-    owner = serializers.PrimaryKeyRelatedField(read_only=True)
-
-    class Meta(DocumentListSerializer.Meta):
-        fields = DocumentListSerializer.Meta.fields + ["owner", "file"]
-
-
-class DocumentUploadSerializer(serializers.ModelSerializer[Document]):
-    class Meta:
-        model = Document
-        fields = [
-            "title", "author", "description", "cover", "file",
-            "file_type", "file_size", "page_count", "tags", "is_public",
-        ]
-
-    def validate_file_size(self, value: int) -> int:
-        max_size = 100 * 1024 * 1024  # 100 MB
-        if value > max_size:
-            raise serializers.ValidationError("File size must not exceed 100 MB.")
-        return value

backend/apps/documents/urls.py

@@ -1,13 +0,0 @@
-from django.urls import include, path
-from rest_framework.routers import DefaultRouter
-
-from . import views
-
-router = DefaultRouter()
-router.register("", views.DocumentViewSet, basename="document")
-
-app_name = "documents"
-
-urlpatterns = [
-    path("", include(router.urls)),
-]

backend/apps/documents/views.py

@@ -1,35 +0,0 @@
-from rest_framework import permissions, viewsets
-
-from .models import Document
-from .serializers import DocumentDetailSerializer, DocumentListSerializer, DocumentUploadSerializer
-
-
-class IsOwnerOrPublic(permissions.BasePermission):
-    """Allow access if user is owner or the document is public."""
-
-    def has_object_permission(self, request, view, obj: Document) -> bool:
-        if request.method in permissions.SAFE_METHODS:
-            return obj.is_public or obj.owner == request.user
-        return obj.owner == request.user
-
-
-class DocumentViewSet(viewsets.ModelViewSet):
-    """CRUD for documents with owner-scoping."""
-    permission_classes = [permissions.IsAuthenticated, IsOwnerOrPublic]
-
-    def get_serializer_class(self):
-        if self.action == "create":
-            return DocumentUploadSerializer
-        if self.action in ("retrieve", "update", "partial_update"):
-            return DocumentDetailSerializer
-        return DocumentListSerializer
-
-    def get_queryset(self):
-        user = self.request.user
-        qs = Document.objects.select_related("owner")
-        if self.action == "list":
-            return qs.filter(owner=user) | qs.filter(is_public=True)
-        return qs
-
-    def perform_create(self, serializer):
-        serializer.save(owner=self.request.user)

backend/apps/reader/apps.py

@@ -0,0 +1,7 @@
+from django.apps import AppConfig
+
+
+class ReaderConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.reader"
+    verbose_name = "Reader Settings"

backend/apps/reader/migrations/0001_initial.py

@@ -0,0 +1,39 @@
+# Generated by Django 5.1.7 on 2026-05-29 06:29
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('users', '__first__'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ReadingSettings',
+            fields=[
+                ('user', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, primary_key=True, related_name='reading_settings', serialize=False, to=settings.AUTH_USER_MODEL)),
+                ('font_family', models.CharField(choices=[('sans-serif', 'Sans-serif'), ('serif', 'Serif'), ('monospace', 'Monospace')], default='serif', max_length=32)),
+                ('font_size', models.PositiveSmallIntegerField(default=18)),
+                ('line_height', models.FloatField(default=1.6)),
+                ('margin_width', models.PositiveSmallIntegerField(default=16)),
+                ('background_color', models.CharField(default='#f5f0eb', max_length=7)),
+                ('text_color', models.CharField(default='#1a1a1a', max_length=7)),
+                ('brightness', models.PositiveSmallIntegerField(default=100)),
+                ('orientation_lock', models.CharField(choices=[('auto', 'Auto'), ('portrait', 'Portrait'), ('landscape', 'Landscape')], default='auto', max_length=16)),
+                ('theme', models.CharField(choices=[('sepia', 'Sepia'), ('dark', 'Dark'), ('light', 'Light'), ('paper', 'Paper')], default='sepia', max_length=32)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                'verbose_name': 'Reading Settings',
+                'verbose_name_plural': 'Reading Settings',
+                'db_table': 'reader_reading_settings',
+            },
+        ),
+    ]

backend/apps/reader/models.py

@@ -0,0 +1,53 @@
+from django.conf import settings
+from django.db import models
+
+
+class ReadingSettings(models.Model):
+    """Per-user reading preferences for the e-book reader view."""
+
+    THEME_CHOICES = [
+        ("sepia", "Sepia"),
+        ("dark", "Dark"),
+        ("light", "Light"),
+        ("paper", "Paper"),
+    ]
+
+    FONT_CHOICES = [
+        ("sans-serif", "Sans-serif"),
+        ("serif", "Serif"),
+        ("monospace", "Monospace"),
+    ]
+
+    ORIENTATION_CHOICES = [
+        ("auto", "Auto"),
+        ("portrait", "Portrait"),
+        ("landscape", "Landscape"),
+    ]
+
+    user = models.OneToOneField(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="reading_settings",
+        primary_key=True,
+    )
+    font_family = models.CharField(max_length=32, choices=FONT_CHOICES, default="serif")
+    font_size = models.PositiveSmallIntegerField(default=18)
+    line_height = models.FloatField(default=1.6)
+    margin_width = models.PositiveSmallIntegerField(default=16)
+    background_color = models.CharField(max_length=7, default="#f5f0eb")
+    text_color = models.CharField(max_length=7, default="#1a1a1a")
+    brightness = models.PositiveSmallIntegerField(default=100)
+    orientation_lock = models.CharField(
+        max_length=16, choices=ORIENTATION_CHOICES, default="auto"
+    )
+    theme = models.CharField(max_length=32, choices=THEME_CHOICES, default="sepia")
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "reader_reading_settings"
+        verbose_name = "Reading Settings"
+        verbose_name_plural = "Reading Settings"
+
+    def __str__(self) -> str:
+        return f"{self.user} — {self.theme} ({self.font_size}px)"

backend/apps/reader/serializers.py

@@ -0,0 +1,63 @@
+from rest_framework import serializers
+
+from apps.reader.models import ReadingSettings
+
+# Theme presets mapped to colors
+THEME_COLORS = {
+    "sepia": {"background_color": "#f5f0eb", "text_color": "#1a1a1a"},
+    "dark": {"background_color": "#1a1a2e", "text_color": "#e0e0e0"},
+    "light": {"background_color": "#ffffff", "text_color": "#1a1a1a"},
+    "paper": {"background_color": "#e8e0d4", "text_color": "#2c2c2c"},
+}
+
+
+class ReadingSettingsSerializer(serializers.ModelSerializer):
+    """Serialize ReadingSettings for the current user."""
+
+    class Meta:
+        model = ReadingSettings
+        fields = [
+            "font_family",
+            "font_size",
+            "line_height",
+            "margin_width",
+            "background_color",
+            "text_color",
+            "brightness",
+            "orientation_lock",
+            "theme",
+            "created_at",
+            "updated_at",
+        ]
+        read_only_fields = ["created_at", "updated_at"]
+
+    def validate_font_size(self, value: int) -> int:
+        if value < 12 or value > 32:
+            raise serializers.ValidationError("Font size must be between 12 and 32.")
+        return value
+
+    def validate_line_height(self, value: float) -> float:
+        if value < 1.2 or value > 2.0:
+            raise serializers.ValidationError("Line height must be between 1.2 and 2.0.")
+        return value
+
+    def validate_margin_width(self, value: int) -> int:
+        if value < 8 or value > 48:
+            raise serializers.ValidationError("Margin width must be between 8 and 48.")
+        return value
+
+    def validate_brightness(self, value: int) -> int:
+        if value < 0 or value > 100:
+            raise serializers.ValidationError("Brightness must be between 0 and 100.")
+        return value
+
+    def validate(self, attrs):
+        """Sync theme colors when theme changes, unless explicit colors provided."""
+        theme = attrs.get("theme")
+        if theme and theme in THEME_COLORS:
+            # Only auto-set colors if not explicitly provided
+            if "background_color" not in attrs:
+                attrs["background_color"] = THEME_COLORS[theme]["background_color"]
+            if "text_color" not in attrs:
+                attrs["text_color"] = THEME_COLORS[theme]["text_color"]
+        return attrs

backend/apps/reader/urls.py

@@ -0,0 +1,7 @@
+from django.urls import path
+
+from apps.reader.views import reading_settings_view
+
+urlpatterns = [
+    path("settings/", reading_settings_view, name="reading-settings"),
+]

backend/apps/reader/views.py

@@ -0,0 +1,33 @@
+from rest_framework import permissions, status
+from rest_framework.decorators import api_view, permission_classes
+from rest_framework.request import Request
+from rest_framework.response import Response
+
+from apps.reader.models import ReadingSettings
+from apps.reader.serializers import ReadingSettingsSerializer
+
+
+@api_view(["GET", "PUT", "PATCH"])
+@permission_classes([permissions.IsAuthenticated])
+def reading_settings_view(request: Request) -> Response:
+    """Get or update the current user's reading settings.
+
+    GET  → return existing settings (auto-create defaults if missing)
+    PUT  → create or fully replace settings
+    PATCH → partial update
+    """
+    user = request.user
+    settings, created = ReadingSettings.objects.get_or_create(user=user)
+
+    if request.method == "GET":
+        serializer = ReadingSettingsSerializer(settings)
+        return Response(serializer.data)
+
+    if request.method == "PUT":
+        serializer = ReadingSettingsSerializer(settings, data=request.data)
+    elif request.method == "PATCH":
+        serializer = ReadingSettingsSerializer(settings, data=request.data, partial=True)
+
+    serializer.is_valid(raise_exception=True)
+    serializer.save()
+    return Response(serializer.data, status=status.HTTP_200_OK)

backend/apps/reading/admin.py

@@ -1,21 +0,0 @@
-from django.contrib import admin
-
-from .models import Bookmark, Highlight, ReadingProgress
-
-
-@admin.register(Bookmark)
-class BookmarkAdmin(admin.ModelAdmin):
-    list_display = ["document", "user", "page", "label", "created_at"]
-    list_filter = ["created_at"]
-
-
-@admin.register(Highlight)
-class HighlightAdmin(admin.ModelAdmin):
-    list_display = ["document", "user", "page", "color", "created_at"]
-    list_filter = ["color", "created_at"]
-
-
-@admin.register(ReadingProgress)
-class ReadingProgressAdmin(admin.ModelAdmin):
-    list_display = ["document", "user", "percentage", "last_read_at"]
-    date_hierarchy = "last_read_at"

backend/apps/reading/models.py

@@ -1,84 +0,0 @@
-from django.conf import settings
-from django.db import models
-
-
-class Bookmark(models.Model):
-    """A user bookmark at a specific page in a document."""
-    document = models.ForeignKey(
-        "documents.Document",
-        on_delete=models.CASCADE,
-        related_name="bookmarks",
-    )
-    user = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="bookmarks",
-    )
-    page = models.PositiveIntegerField()
-    label = models.CharField(max_length=300, blank=True, default="")
-    created_at = models.DateTimeField(auto_now_add=True)
-
-    class Meta:
-        db_table = "reading_bookmark"
-        ordering = ["page"]
-        unique_together = [["document", "user", "page"]]
-
-    def __str__(self) -> str:
-        return f"{self.document.title} p.{self.page}"
-
-
-class Highlight(models.Model):
-    """A highlighted passage in a document."""
-    document = models.ForeignKey(
-        "documents.Document",
-        on_delete=models.CASCADE,
-        related_name="highlights",
-    )
-    user = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="highlights",
-    )
-    page = models.PositiveIntegerField()
-    color = models.CharField(max_length=20, default="yellow")
-    text = models.TextField()
-    note = models.TextField(blank=True, null=True)
-    created_at = models.DateTimeField(auto_now_add=True)
-
-    class Meta:
-        db_table = "reading_highlight"
-        ordering = ["-created_at"]
-
-    def __str__(self) -> str:
-        return f"Highlight on {self.document.title} p.{self.page}"
-
-
-class ReadingProgress(models.Model):
-    """Tracks the user's reading progress through a document."""
-    document = models.ForeignKey(
-        "documents.Document",
-        on_delete=models.CASCADE,
-        related_name="reading_progress",
-    )
-    user = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="reading_progress",
-    )
-    current_page = models.PositiveIntegerField(default=1)
-    total_pages = models.PositiveIntegerField(default=0)
-    percentage = models.FloatField(default=0.0)
-    last_read_at = models.DateTimeField(auto_now=True)
-
-    class Meta:
-        db_table = "reading_progress"
-        unique_together = [["document", "user"]]
-        verbose_name_plural = "Reading progress"
-
-    def __str__(self) -> str:
-        return f"{self.document.title} — {self.percentage:.0f}%"
-
-    def save(self, *args, **kwargs):
-        if self.total_pages > 0:
-            self.percentage = round((self.current_page / self.total_pages) * 100, 1)
-        super().save(*args, **kwargs)

backend/apps/reading/serializers.py

@@ -1,35 +0,0 @@
-from rest_framework import serializers
-
-from .models import Bookmark, Highlight, ReadingProgress
-
-
-class BookmarkSerializer(serializers.ModelSerializer[Bookmark]):
-    class Meta:
-        model = Bookmark
-        fields = ["id", "document", "page", "label", "created_at"]
-        read_only_fields = ["id", "created_at"]
-
-
-class HighlightSerializer(serializers.ModelSerializer[Highlight]):
-    class Meta:
-        model = Highlight
-        fields = ["id", "document", "page", "color", "text", "note", "created_at"]
-        read_only_fields = ["id", "created_at"]
-
-
-class ReadingProgressSerializer(serializers.ModelSerializer[ReadingProgress]):
-    class Meta:
-        model = ReadingProgress
-        fields = ["id", "document", "current_page", "total_pages", "percentage", "last_read_at"]
-        read_only_fields = ["id", "percentage", "last_read_at"]
-
-
-class ReadingProgressUpdateSerializer(serializers.ModelSerializer[ReadingProgress]):
-    class Meta:
-        model = ReadingProgress
-        fields = ["current_page", "total_pages"]
-
-    def validate_current_page(self, value: int) -> int:
-        if value < 1:
-            raise serializers.ValidationError("Page must be at least 1.")
-        return value

backend/apps/reading/urls.py

@@ -1,15 +0,0 @@
-from django.urls import include, path
-from rest_framework.routers import DefaultRouter
-
-from . import views
-
-router = DefaultRouter()
-router.register("bookmarks", views.BookmarkViewSet, basename="bookmark")
-router.register("highlights", views.HighlightViewSet, basename="highlight")
-router.register("progress", views.ReadingProgressViewSet, basename="reading-progress")
-
-app_name = "reading"
-
-urlpatterns = [
-    path("", include(router.urls)),
-]

backend/apps/reading/views.py

@@ -1,49 +0,0 @@
-from rest_framework import permissions, viewsets
-
-from .models import Bookmark, Highlight, ReadingProgress
-from .serializers import (
-    BookmarkSerializer,
-    HighlightSerializer,
-    ReadingProgressSerializer,
-    ReadingProgressUpdateSerializer,
-)
-
-
-class BookmarkViewSet(viewsets.ModelViewSet):
-    """User bookmarks for documents."""
-    serializer_class = BookmarkSerializer
-    permission_classes = [permissions.IsAuthenticated]
-
-    def get_queryset(self):
-        return Bookmark.objects.filter(user=self.request.user).select_related("document")
-
-    def perform_create(self, serializer):
-        serializer.save(user=self.request.user)
-
-
-class HighlightViewSet(viewsets.ModelViewSet):
-    """User highlights for documents."""
-    serializer_class = HighlightSerializer
-    permission_classes = [permissions.IsAuthenticated]
-
-    def get_queryset(self):
-        return Highlight.objects.filter(user=self.request.user).select_related("document")
-
-    def perform_create(self, serializer):
-        serializer.save(user=self.request.user)
-
-
-class ReadingProgressViewSet(viewsets.ModelViewSet):
-    """Reading progress tracker."""
-    permission_classes = [permissions.IsAuthenticated]
-
-    def get_serializer_class(self):
-        if self.action in ("create", "update", "partial_update"):
-            return ReadingProgressUpdateSerializer
-        return ReadingProgressSerializer
-
-    def get_queryset(self):
-        return ReadingProgress.objects.filter(user=self.request.user).select_related("document")
-
-    def perform_create(self, serializer):
-        serializer.save(user=self.request.user)

backend/apps/users/admin.py

@@ -0,0 +1,11 @@
+from django.contrib import admin
+from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
+
+from apps.users.models import User
+
+
+@admin.register(User)
+class UserAdmin(BaseUserAdmin):
+    """Admin config for the custom User model."""
+    list_display = ("email", "username", "is_staff", "is_active", "date_joined")
+    search_fields = ("email", "username")

backend/apps/users/apps.py

@@ -0,0 +1,7 @@
+from django.apps import AppConfig
+
+
+class UsersConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.users"
+    label = "users"

backend/apps/users/migrations/0001_initial.py

@@ -0,0 +1,44 @@
+# Generated by Django 5.1.7 on 2026-06-03 22:26
+
+import django.contrib.auth.models
+import django.contrib.auth.validators
+import django.utils.timezone
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('auth', '0012_alter_user_first_name_max_length'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='User',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('password', models.CharField(max_length=128, verbose_name='password')),
+                ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
+                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
+                ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')),
+                ('first_name', models.CharField(blank=True, max_length=150, verbose_name='first name')),
+                ('last_name', models.CharField(blank=True, max_length=150, verbose_name='last name')),
+                ('email', models.EmailField(blank=True, max_length=254, verbose_name='email address')),
+                ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
+                ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
+                ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
+                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.group', verbose_name='groups')),
+                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.permission', verbose_name='user permissions')),
+            ],
+            options={
+                'verbose_name': 'User',
+                'verbose_name_plural': 'Users',
+                'db_table': 'users_user',
+            },
+            managers=[
+                ('objects', django.contrib.auth.models.UserManager()),
+            ],
+        ),
+    ]

backend/apps/users/models.py

@@ -0,0 +1,13 @@
+from django.contrib.auth.models import AbstractUser
+
+
+class User(AbstractUser):
+    """Custom user model. Uses email as the unique identifier field."""
+
+    class Meta:
+        db_table = "users_user"
+        verbose_name = "User"
+        verbose_name_plural = "Users"
+
+    def __str__(self) -> str:
+        return self.email or self.username

backend/apps/users/serializers.py

@@ -0,0 +1,93 @@
+import re
+
+from django.contrib.auth import get_user_model
+from django.contrib.auth.password_validation import validate_password
+from rest_framework import serializers
+from rest_framework_simplejwt.serializers import TokenObtainPairSerializer
+
+User = get_user_model()
+
+
+def _derive_username(email: str) -> str:
+    local = email.split("@", 1)[0]
+    candidate = re.sub(r"[^\w.@+-]", "_", local).strip("._")
+    return candidate[:150] if candidate else "user"
+
+
+def _unique_username(base: str) -> str:
+    username = base[:150]
+    if not User.objects.filter(username=username).exists():
+        return username
+    suffix = 1
+    while User.objects.filter(username=f"{username[:140]}_{suffix}").exists():
+        suffix += 1
+    return f"{username[:140]}_{suffix}"
+
+
+class RegisterSerializer(serializers.Serializer):
+    email = serializers.EmailField()
+    password = serializers.CharField(write_only=True, min_length=8)
+
+    def validate_email(self, value: str) -> str:
+        email = value.lower()
+        if User.objects.filter(email__iexact=email).exists():
+            raise serializers.ValidationError("A user with this email already exists.")
+        return email
+
+    def validate_password(self, value: str) -> str:
+        validate_password(value)
+        return value
+
+    def create(self, validated_data: dict) -> User:
+        email = validated_data["email"]
+        username = _unique_username(_derive_username(email))
+        return User.objects.create_user(
+            username=username,
+            email=email,
+            password=validated_data["password"],
+        )
+
+    def to_representation(self, instance: User) -> dict:
+        return {
+            "id": instance.id,
+            "email": instance.email,
+            "username": instance.username,
+        }
+
+
+class EmailTokenObtainPairSerializer(TokenObtainPairSerializer):
+    def __init__(self, *args, **kwargs) -> None:
+        super().__init__(*args, **kwargs)
+        self.fields.pop(self.username_field, None)
+        self.fields["email"] = serializers.EmailField(required=True)
+
+    def validate(self, attrs: dict) -> dict:
+        email = attrs.get("email", "").lower()
+        password = attrs.get("password")
+
+        try:
+            user = User.objects.get(email__iexact=email)
+        except User.DoesNotExist as exc:
+            raise serializers.ValidationError(
+                {"detail": "No active account found with the given credentials."}
+            ) from exc
+
+        if not user.check_password(password):
+            raise serializers.ValidationError(
+                {"detail": "No active account found with the given credentials."}
+            )
+
+        if not user.is_active:
+            raise serializers.ValidationError({"detail": "User account is disabled."})
+
+        refresh = self.get_token(user)
+        return {
+            "refresh": str(refresh),
+            "access": str(refresh.access_token),
+        }
+
+    @classmethod
+    def get_token(cls, user: User) -> object:
+        token = super().get_token(user)
+        token["email"] = user.email
+        return token

backend/apps/users/urls.py

@@ -0,0 +1,11 @@
+from django.urls import path
+from rest_framework_simplejwt.views import TokenRefreshView
+
+from apps.users.views import EmailTokenObtainPairView, RegisterView
+
+urlpatterns = [
+    path("register/", RegisterView.as_view(), name="register"),
+    path("token/", EmailTokenObtainPairView.as_view(), name="token_obtain_pair"),
+    path("login/", EmailTokenObtainPairView.as_view(), name="login"),
+    path("token/refresh/", TokenRefreshView.as_view(), name="token_refresh"),
+]

backend/apps/users/views.py

@@ -0,0 +1,14 @@
+from rest_framework import generics
+from rest_framework.permissions import AllowAny
+from rest_framework_simplejwt.views import TokenObtainPairView
+
+from apps.users.serializers import EmailTokenObtainPairSerializer, RegisterSerializer
+
+
+class RegisterView(generics.CreateAPIView):
+    serializer_class = RegisterSerializer
+    permission_classes = [AllowAny]
+
+
+class EmailTokenObtainPairView(TokenObtainPairView):
+    serializer_class = EmailTokenObtainPairSerializer

backend/config/django.py

@@ -0,0 +1,158 @@
+"""
+Django settings for cloud-reader backend.
+
+Generated using Django 5.1.  Customised with pydantic-settings integration.
+"""
+
+from pathlib import Path
+
+from config.settings import settings
+
+# ---------------------------------------------------------------------------
+# Build paths
+# ---------------------------------------------------------------------------
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+# ---------------------------------------------------------------------------
+# Security
+# ---------------------------------------------------------------------------
+SECRET_KEY = settings.DJANGO_SECRET_KEY
+DEBUG = settings.DJANGO_DEBUG
+ALLOWED_HOSTS = settings.DJANGO_ALLOWED_HOSTS
+
+# ---------------------------------------------------------------------------
+# Application definition
+# ---------------------------------------------------------------------------
+INSTALLED_APPS = [
+    # Django built-in
+    "django.contrib.admin",
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sessions",
+    "django.contrib.messages",
+    "django.contrib.staticfiles",
+    # Third-party
+    "rest_framework",
+    "rest_framework_simplejwt",
+    "corsheaders",
+    "django_filters",
+    # Local apps
+    "apps.users",
+    "apps.books",
+    "apps.annotations",
+    "apps.reader",
+]
+
+MIDDLEWARE = [
+    "corsheaders.middleware.CorsMiddleware",
+    "django.middleware.security.SecurityMiddleware",
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.common.CommonMiddleware",
+    "django.middleware.csrf.CsrfViewMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    "django.contrib.messages.middleware.MessageMiddleware",
+    "django.middleware.clickjacking.XFrameOptionsMiddleware",
+]
+
+ROOT_URLCONF = "config.urls"
+
+TEMPLATES = [
+    {
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [],
+        "APP_DIRS": True,
+        "OPTIONS": {
+            "context_processors": [
+                "django.template.context_processors.debug",
+                "django.template.context_processors.request",
+                "django.contrib.auth.context_processors.auth",
+                "django.contrib.messages.context_processors.messages",
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = "config.wsgi.application"
+
+# ---------------------------------------------------------------------------
+# Database
+# ---------------------------------------------------------------------------
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.postgresql",
+        "NAME": settings.DB_NAME,
+        "USER": settings.DB_USER,
+        "PASSWORD": settings.DB_PASSWORD,
+        "HOST": settings.DB_HOST,
+        "PORT": settings.DB_PORT,
+    }
+}
+
+# ---------------------------------------------------------------------------
+# Auth
+# ---------------------------------------------------------------------------
+AUTH_USER_MODEL = "users.User"
+
+AUTH_PASSWORD_VALIDATORS = [
+    {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
+    {"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator"},
+]
+
+# ---------------------------------------------------------------------------
+# DRF
+# ---------------------------------------------------------------------------
+REST_FRAMEWORK = {
+    "DEFAULT_AUTHENTICATION_CLASSES": (
+        "rest_framework_simplejwt.authentication.JWTAuthentication",
+    ),
+    "DEFAULT_PERMISSION_CLASSES": (
+        "rest_framework.permissions.IsAuthenticated",
+    ),
+    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.PageNumberPagination",
+    "PAGE_SIZE": 50,
+    "DEFAULT_FILTER_BACKENDS": [
+        "django_filters.rest_framework.DjangoFilterBackend",
+        "rest_framework.filters.OrderingFilter",
+        "rest_framework.filters.SearchFilter",
+    ],
+}
+
+# ---------------------------------------------------------------------------
+# SimpleJWT
+# ---------------------------------------------------------------------------
+from datetime import timedelta
+
+SIMPLE_JWT = {
+    "ACCESS_TOKEN_LIFETIME": timedelta(minutes=settings.JWT_ACCESS_TOKEN_LIFETIME_MINUTES),
+    "REFRESH_TOKEN_LIFETIME": timedelta(days=settings.JWT_REFRESH_TOKEN_LIFETIME_DAYS),
+}
+
+# ---------------------------------------------------------------------------
+# CORS
+# ---------------------------------------------------------------------------
+CORS_ALLOWED_ORIGINS = settings.CORS_ALLOWED_ORIGINS
+
+# ---------------------------------------------------------------------------
+# i18n
+# ---------------------------------------------------------------------------
+LANGUAGE_CODE = "en-us"
+TIME_ZONE = "UTC"
+USE_I18N = True
+USE_TZ = True
+
+# ---------------------------------------------------------------------------
+# Static / Media / Uploads
+# ---------------------------------------------------------------------------
+STATIC_URL = "static/"
+STATIC_ROOT = BASE_DIR / "staticfiles"
+MEDIA_URL = "/media/"
+MEDIA_ROOT = BASE_DIR / "media"
+
+# Maximum upload size: 50MB
+DATA_UPLOAD_MAX_MEMORY_SIZE = 52_428_800
+FILE_UPLOAD_MAX_MEMORY_SIZE = 52_428_800
+
+# ---------------------------------------------------------------------------
+# Default primary key
+# ---------------------------------------------------------------------------
+DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

backend/config/exceptions.py

@@ -1,13 +0,0 @@
-"""Custom exception handler that returns consistent JSON error responses."""
-from rest_framework.views import exception_handler
-
-
-def custom_exception_handler(exc, context):
-    """Wrap DRF's default handler to always return {'detail': ..., 'code': ...}."""
-    response = exception_handler(exc, context)
-    if response is not None:
-        data = response.data
-        # Flatten validation errors into a consistent shape
-        if isinstance(data, dict) and "detail" not in data:
-            response.data = {"detail": "Validation error", "fields": data, "code": "validation_error"}
-    return response

backend/config/settings.py

@@ -1,170 +1,47 @@
-import os
+from pydantic_settings import BaseSettings
-from pathlib import Path
 
-import decouple
 
-BASE_DIR = Path(__file__).resolve().parent.parent
+class Settings(BaseSettings):
+    """Application settings via pydantic-settings. Reads from env vars and .env."""
 
-# ---------------------------------------------------------------------------
+    # Django
-# Environment
+    DJANGO_SECRET_KEY: str = "django-insecure-change-me-in-production"
-# ---------------------------------------------------------------------------
+    DJANGO_DEBUG: bool = False
-config = decouple.AutoConfig(search_path=BASE_DIR / ".env")
+    DJANGO_ALLOWED_HOSTS: list[str] = ["*"]
 
-SECRET_KEY = config("SECRET_KEY", default="django-insecure-change-me-in-production")
+    # PostgreSQL
-DEBUG = config("DEBUG", default=False, cast=bool)
+    DB_NAME: str = "cloud_reader"
-ALLOWED_HOSTS = config("ALLOWED_HOSTS", default="localhost,127.0.0.1", cast=decouple.Csv())
+    DB_USER: str = "postgres"
+    DB_PASSWORD: str = "postgres"
+    DB_HOST: str = "localhost"
+    DB_PORT: int = 5432
 
-# ---------------------------------------------------------------------------
+    # JWT
-# Application definition
+    JWT_ACCESS_TOKEN_LIFETIME_MINUTES: int = 60
-# ---------------------------------------------------------------------------
+    JWT_REFRESH_TOKEN_LIFETIME_DAYS: int = 7
-INSTALLED_APPS = [
-    "django.contrib.admin",
-    "django.contrib.auth",
-    "django.contrib.contenttypes",
-    "django.contrib.sessions",
-    "django.contrib.messages",
-    "django.contrib.staticfiles",
-    # Third-party
-    "rest_framework",
-    "rest_framework_simplejwt",
-    "corsheaders",
-    "django_filters",
-    "drf_spectacular",
-    # Local
-    "apps.accounts",
-    "apps.documents",
-    "apps.collections",
-    "apps.reading",
-]
 
-MIDDLEWARE = [
+    # CORS
-    "django.middleware.security.SecurityMiddleware",
+    CORS_ALLOWED_ORIGINS: list[str] = [
-    "whitenoise.middleware.WhiteNoiseMiddleware",
+        "http://localhost:5173",
-    "corsheaders.middleware.CorsMiddleware",
+        "http://localhost:3000",
-    "django.contrib.sessions.middleware.SessionMiddleware",
+    ]
-    "django.middleware.common.CommonMiddleware",
-    "django.middleware.csrf.CsrfViewMiddleware",
-    "django.contrib.auth.middleware.AuthenticationMiddleware",
-    "django.contrib.messages.middleware.MessageMiddleware",
-    "django.middleware.clickjacking.XFrameOptionsMiddleware",
-]
 
-ROOT_URLCONF = "config.urls"
+    # Open Library metadata enrichment
+    OPENLIBRARY_ENABLED: bool = True
+    OPENLIBRARY_PREFERRED_LANG: str = "es"
+    OPENLIBRARY_FALLBACK_LANG: str = "en"
+    OPENLIBRARY_TIMEOUT_SECONDS: float = 10.0
+    OPENLIBRARY_CONNECT_TIMEOUT_SECONDS: float = 15.0
+    OPENLIBRARY_USER_AGENT: str = "CloudReader/1.0 (https://github.com/cloud-reader)"
 
-TEMPLATES = [
+    @property
-    {
+    def DATABASE_URL(self) -> str:
-        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        return (
-        "DIRS": [BASE_DIR / "templates"],
+            f"postgresql://{self.DB_USER}:{self.DB_PASSWORD}"
-        "APP_DIRS": True,
+            f"@{self.DB_HOST}:{self.DB_PORT}/{self.DB_NAME}"
-        "OPTIONS": {
+        )
-            "context_processors": [
-                "django.template.context_processors.debug",
-                "django.template.context_processors.request",
-                "django.contrib.auth.context_processors.auth",
-                "django.contrib.messages.context_processors.messages",
-            ],
-        },
-    },
-]
 
-WSGI_APPLICATION = "config.wsgi.application"
+    model_config = {"env_file": ".env", "env_file_encoding": "utf-8"}
 
-# ---------------------------------------------------------------------------
-# Database
-# ---------------------------------------------------------------------------
-DATABASES = {
-    "default": {
-        "ENGINE": config("DB_ENGINE", default="django.db.backends.postgresql"),
-        "NAME": config("DB_NAME", default="cloud_reader"),
-        "USER": config("DB_USER", default="cloud_reader"),
-        "PASSWORD": config("DB_PASSWORD", default="cloud_reader"),
-        "HOST": config("DB_HOST", default="localhost"),
-        "PORT": config("DB_PORT", default="5432", cast=int),
-    }
-}
 
-DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
+settings = Settings()
-
-# ---------------------------------------------------------------------------
-# Auth
-# ---------------------------------------------------------------------------
-AUTH_USER_MODEL = "accounts.User"
-AUTH_PASSWORD_VALIDATORS = [
-    {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
-    {"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator"},
-    {"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator"},
-]
-
-LOGIN_URL = "rest_framework:login"
-LOGOUT_URL = "rest_framework:logout"
-
-# ---------------------------------------------------------------------------
-# Internationalization
-# ---------------------------------------------------------------------------
-LANGUAGE_CODE = "en-us"
-TIME_ZONE = "UTC"
-USE_I18N = True
-USE_TZ = True
-
-# ---------------------------------------------------------------------------
-# Static & Media files
-# ---------------------------------------------------------------------------
-STATIC_URL = "static/"
-STATIC_ROOT = BASE_DIR / "staticfiles"
-STATICFILES_DIRS = [BASE_DIR / "static"]
-STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"
-
-MEDIA_URL = "media/"
-MEDIA_ROOT = BASE_DIR / "media"
-
-# ---------------------------------------------------------------------------
-# CORS
-# ---------------------------------------------------------------------------
-CORS_ALLOWED_ORIGINS = config(
-    "CORS_ALLOWED_ORIGINS",
-    default="http://localhost:5173,http://localhost:3000",
-    cast=decouple.Csv(),
-)
-CORS_ALLOW_CREDENTIALS = True
-
-# ---------------------------------------------------------------------------
-# REST Framework
-# ---------------------------------------------------------------------------
-REST_FRAMEWORK = {
-    "DEFAULT_AUTHENTICATION_CLASSES": (
-        "rest_framework_simplejwt.authentication.JWTAuthentication",
-    ),
-    "DEFAULT_PERMISSION_CLASSES": (
-        "rest_framework.permissions.IsAuthenticated",
-    ),
-    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.PageNumberPagination",
-    "PAGE_SIZE": 20,
-    "DEFAULT_FILTER_BACKENDS": [
-        "django_filters.rest_framework.DjangoFilterBackend",
-        "rest_framework.filters.SearchFilter",
-        "rest_framework.filters.OrderingFilter",
-    ],
-    "DEFAULT_SCHEMA_CLASS": "drf_spectacular.openapi.AutoSchema",
-    "EXCEPTION_HANDLER": "config.exceptions.custom_exception_handler",
-}
-
-# ---------------------------------------------------------------------------
-# SimpleJWT
-# ---------------------------------------------------------------------------
-from datetime import timedelta  # noqa: E402
-
-SIMPLE_JWT = {
-    "ACCESS_TOKEN_LIFETIME": timedelta(minutes=30),
-    "REFRESH_TOKEN_LIFETIME": timedelta(days=7),
-    "ROTATE_REFRESH_TOKENS": True,
-    "AUTH_HEADER_TYPES": ("Bearer",),
-}
-
-# ---------------------------------------------------------------------------
-# drf-spectacular (OpenAPI)
-# ---------------------------------------------------------------------------
-SPECTACULAR_SETTINGS = {
-    "TITLE": "Cloud Reader API",
-    "VERSION": "0.1.0",
-    "SERVE_INCLUDE_SCHEMA": False,
-}

backend/config/urls.py

@@ -1,13 +1,16 @@
+from django.conf import settings
 from django.contrib import admin
 from django.urls import include, path
 
 urlpatterns = [
     path("admin/", admin.site.urls),
-    # API
+    path("api/auth/", include("apps.users.urls")),
-    path("api/v1/auth/", include("apps.accounts.urls")),
+    path("api/books/", include("apps.books.urls")),
-    path("api/v1/documents/", include("apps.documents.urls")),
+    path("api/annotations/", include("apps.annotations.urls")),
-    path("api/v1/collections/", include("apps.collections.urls")),
+    path("api/reader/", include("apps.reader.urls")),
-    path("api/v1/reading/", include("apps.reading.urls")),
-    # OpenAPI schema
-    path("api/schema/", include("drf_spectacular.urls")),
 ]
+
+if settings.DEBUG:
+    from django.conf.urls.static import static
+
+    urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

backend/config/wsgi.py

@@ -2,6 +2,6 @@ import os
 
 from django.core.wsgi import get_wsgi_application
 
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings")
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.django")
 
 application = get_wsgi_application()

backend/manage.py

@@ -1,12 +1,13 @@
 #!/usr/bin/env python
 """Django's command-line utility for administrative tasks."""
+
 import os
 import sys
 
 
-def main() -> None:
+def main():
     """Run administrative tasks."""
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings")
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.django")
     try:
         from django.core.management import execute_from_command_line
     except ImportError as exc:

backend/pyproject.toml

@@ -1,33 +1,25 @@
 [project]
-name = "cloud-reader-backend"
+name = "backend"
 version = "0.1.0"
-description = "Cloud Reader API — Django REST Framework backend"
-readme = "README.md"
 requires-python = ">=3.12"
 dependencies = [
-    "django>=5.1,<6.0",
+    "coverage==7.6.10",
-    "djangorestframework>=3.15,<4.0",
+    "django==5.1.7",
-    "django-cors-headers>=4.3",
+    "django-cors-headers==4.6.0",
-    "django-filter>=24.3",
+    "django-filter==25.1",
-    "psycopg2-binary>=2.9",
+    "djangorestframework==3.15.2",
-    "python-decouple>=3.8",
+    "djangorestframework-simplejwt==5.4.0",
-    "djangorestframework-simplejwt>=5.3",
+    "gunicorn==23.0.0",
-    "drf-spectacular>=0.27",
+    "pillow>=11.0.0",
-    "gunicorn>=22.0",
+    "psycopg2-binary==2.9.10",
-    "whitenoise>=6.6",
+    "pydantic==2.10.5",
-    "Pillow>=10.3",
+    "pydantic-settings==2.7.1",
+    "pytest==8.3.4",
+    "pytest-cov==6.0.0",
+    "pytest-django==4.9.0",
+    "python-dotenv==1.0.1",
+    "httpx>=0.28.0",
+    "ebooklib>=0.18",
+    "beautifulsoup4>=4.12.0",
+    "pypdf>=5.0.0",
 ]
-
-[project.optional-dependencies]
-dev = [
-    "pytest>=8.0",
-    "pytest-django>=4.8",
-    "pytest-cov>=5.0",
-    "model-bakery>=1.17",
-    "ruff>=0.5",
-    "ipdb>=0.13",
-]
-
-[build-system]
-requires = ["setuptools>=72"]
-build-backend = "setuptools.build_meta"

backend/pytest.ini

@@ -1,5 +1,8 @@
-# pytest
+[tool:pytest]
-DJANGO_SETTINGS_MODULE = config.settings
+DJANGO_SETTINGS_MODULE = config.django
 python_files = tests.py test_*.py *_tests.py
-django_find_project = false
+testpaths = apps
-testpaths = apps/
+
+[coverage:run]
+source = apps
+omit = */tests/*,*/migrations/*,*/admin.py,*/apps.py

backend/requirements.txt

@@ -0,0 +1,15 @@
+Django==5.1.7
+djangorestframework==3.15.2
+djangorestframework-simplejwt==5.4.0
+django-filter==25.1
+django-cors-headers==4.6.0
+psycopg2-binary==2.9.10
+pydantic==2.10.5
+pydantic-settings==2.7.1
+python-dotenv==1.0.1
+gunicorn==23.0.0
+Pillow>=11.0.0
+pytest==8.3.4
+pytest-django==4.9.0
+pytest-cov==6.0.0
+coverage==7.6.10

backend/requirements/dev.txt

@@ -1,7 +0,0 @@
--r production.txt
-pytest>=8.0
-pytest-django>=4.8
-pytest-cov>=5.0
-model-bakery>=1.17
-ruff>=0.5
-ipdb>=0.13

backend/requirements/production.txt

@@ -1,12 +0,0 @@
-# Django
-django>=5.1,<6.0
-djangorestframework>=3.15,<4.0
-django-cors-headers>=4.3
-django-filter>=24.3
-psycopg2-binary>=2.9
-python-decouple>=3.8
-djangorestframework-simplejwt>=5.3
-drf-spectacular>=0.27
-gunicorn>=22.0
-whitenoise>=6.6
-Pillow>=10.3

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docker-compose.yml

@@ -1,39 +1,57 @@
-version: "3.9"
-
 services:
   db:
-    image: postgres:16
+    image: postgres:15
+    restart: unless-stopped
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
     environment:
-      POSTGRES_DB: cloud_reader
+      POSTGRES_DB: ${POSTGRES_DB:-cloud_reader}
-      POSTGRES_USER: cloud_reader
+      POSTGRES_USER: ${POSTGRES_USER:-postgres}
-      POSTGRES_PASSWORD: cloud_reader
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
     ports:
       - "5432:5432"
-    volumes:
+    healthcheck:
-      - pgdata:/var/lib/postgresql/data
+      test: ["CMD-SHELL", "pg_isready -U postgres -d cloud_reader"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
 
   backend:
-    build: backend
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
     ports:
       - "8000:8000"
     environment:
-      SECRET_KEY: development-secret-key
+      DJANGO_SECRET_KEY: ${DJANGO_SECRET_KEY}
-      DEBUG: "True"
+      DJANGO_DEBUG: ${DJANGO_DEBUG:-True}
-      DB_HOST: db
+      DB_NAME: ${POSTGRES_DB:-cloud_reader}
-      DB_NAME: cloud_reader
+      DB_USER: ${POSTGRES_USER:-postgres}
-      DB_USER: cloud_reader
+      DB_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
-      DB_PASSWORD: cloud_reader
+      DB_HOST: ${DB_HOST:-db}
-      CORS_ALLOWED_ORIGINS: http://localhost:5173,http://localhost:3000
+      DB_PORT: ${DB_PORT:-5432}
-      ALLOWED_HOSTS: localhost,127.0.0.1
+    volumes:
+      - ./backend:/app
+      - ./backend/media:/app/media
+    command: >
+      sh -c "python manage.py migrate && python manage.py runserver 0.0.0.0:8000"
     depends_on:
-      - db
+      db:
+        condition: service_healthy
 
   frontend:
-    build: frontend
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
     ports:
-      - "5173:80"
+      - "5173:5173"
+    environment:
+      VITE_API_URL: ${VITE_API_URL:-http://localhost:8000}
+    volumes:
+      - ./frontend:/app
+      - /app/node_modules
     depends_on:
       - backend
 
 volumes:
-  pgdata:
+  postgres_data:

docs/backend/010-open-library-metadata.md

@@ -0,0 +1,117 @@
+# 010 — Open Library metadata on import
+
+**Status:** Implemented  
+**Created:** 2026-06-03
+
+## Objective
+
+After a user uploads an EPUB/PDF (`POST /api/books/ebooks/`), enrich the `EBook` with metadata and a cover from [Open Library](https://openlibrary.org/developers/api), using only **title** and **author** from the upload form. Prefer **Spanish** editions when available; fall back to English/any.
+
+Upload must **never fail** if Open Library is down or no match is found.
+
+## Trigger
+
+- **Automatic:** `EBookUploadSerializer.create()` calls `enrich_ebook_metadata(ebook)` after file save.
+- **Manual:** `POST /api/books/ebooks/{id}/enrich-metadata/` re-runs enrichment (owner only).
+
+## Open Library usage
+
+### Search
+
+`GET https://openlibrary.org/search.json`
+
+| Param | Value |
+|-------|--------|
+| `title` | User-provided title |
+| `author` | User-provided author |
+| `lang` | `es` (primary) or `en` (fallback) |
+| `limit` | `5` |
+| `fields` | `key,title,author_name,cover_i,first_publish_year,subject,language,edition_key,number_of_pages_median,publisher` |
+
+Primary pass also uses query filter `language:spa`. Fallback omits language filter.
+
+### Covers
+
+`GET https://covers.openlibrary.org/b/id/{cover_i}-L.jpg` — downloaded and stored on `EBook.cover_image`.
+
+## Match scoring
+
+| Score | Behavior |
+|-------|----------|
+| ≥ 0.8 | Apply OL title/author + cover + full metadata |
+| 0.6 – 0.8 | Metadata + cover only; keep user title/author |
+| < 0.6 | `match_status: not_found`; no field changes except metadata stub |
+
+Author overlap + title similarity (normalized strings, `difflib.SequenceMatcher`). Prefer hits with `cover_i`.
+
+## Data model
+
+No migration. Uses existing fields on `EBook`:
+
+- `metadata_json` — full enrichment payload (see below)
+- `cover_image` — downloaded cover file
+- `title` / `author` — updated when match score ≥ 0.8
+
+### `metadata_json` shape
+
+```json
+{
+  "source": "openlibrary",
+  "matched_at": "2026-06-03T12:00:00+00:00",
+  "match_language": "es",
+  "match_score": 0.92,
+  "match_status": "matched",
+  "user_input": { "title": "...", "author": "..." },
+  "openlibrary": {
+    "work_key": "/works/OL...",
+    "edition_key": "...",
+    "title": "...",
+    "authors": ["..."],
+    "cover_id": 12345,
+    "cover_url": "https://covers.openlibrary.org/b/id/12345-L.jpg",
+    "first_publish_year": 1605,
+    "subjects": ["..."],
+    "languages": ["spa"],
+    "publishers": ["..."],
+    "number_of_pages_median": 320
+  }
+}
+```
+
+## API changes
+
+### Upload response (unchanged path)
+
+`POST /api/books/ebooks/` — response may include populated `cover_image` and updated `title`/`author` after sync enrichment.
+
+### Detail
+
+`GET /api/books/ebooks/{id}/` — adds read-only `metadata` (alias of `metadata_json`).
+
+### Manual refresh
+
+`POST /api/books/ebooks/{id}/enrich-metadata/` — returns updated `EBookDetailSerializer` payload.
+
+## Configuration
+
+| Env var | Default | Description |
+|---------|---------|-------------|
+| `OPENLIBRARY_ENABLED` | `true` | Kill switch |
+| `OPENLIBRARY_PREFERRED_LANG` | `es` | Primary `lang` param |
+| `OPENLIBRARY_FALLBACK_LANG` | `en` | Fallback `lang` param |
+| `OPENLIBRARY_TIMEOUT_SECONDS` | `5` | HTTP timeout |
+| `OPENLIBRARY_USER_AGENT` | `CloudReader/1.0` | User-Agent header |
+
+## Code layout
+
+```
+backend/apps/books/services/
+├── openlibrary.py   # Search, scoring, cover download
+└── metadata.py      # enrich_ebook_metadata orchestrator
+```
+
+## Verification
+
+1. Upload with title `Don Quijote`, author `Cervantes` → cover + Spanish-friendly metadata.
+2. Upload with nonsense title/author → 201, no cover, `match_status: not_found`.
+3. `POST .../enrich-metadata/` on existing ebook refreshes metadata.

docs/backend/search-discovery-spec.md

@@ -0,0 +1,107 @@
+# Book Search & Discovery — Spec
+
+## Overview
+Enable users to search books within the library and discover new books via filters and a dedicated detail view.
+
+## Backend API Contracts
+
+### Book List & Search
+`GET /api/books/`
+
+**Query Parameters:**
+| Param | Type | Description |
+|-------|------|-------------|
+| `q` | string | Full-text search across title, author, genre |
+| `genre` | string | Exact filter by genre |
+| `author` | string | Exact filter by author |
+| `reading_status` | string | Filter: `want_to_read`, `reading`, `finished`, `dnf` |
+| `ordering` | string | `title`, `author`, `genre`, `created_at` (prefix `-` for desc) |
+| `page` | int | Page number (default: 1) |
+
+**Response (paginated):**
+```json
+{
+  "count": 42,
+  "next": "http://.../?page=2",
+  "previous": null,
+  "results": [
+    {
+      "id": 1,
+      "title": "Dune",
+      "author": "Frank Herbert",
+      "genre": "Science Fiction",
+      "reading_status": "finished",
+      "reading_status_display": "Finished",
+      "cover_image": "https://..."
+    }
+  ]
+}
+```
+
+### Book Detail
+`GET /api/books/{id}/`
+
+**Response:**
+```json
+{
+  "id": 1,
+  "title": "Dune",
+  "author": "Frank Herbert",
+  "genre": "Science Fiction",
+  "description": "...",
+  "reading_status": "finished",
+  "reading_status_display": "Finished",
+  "cover_image": "https://...",
+  "total_pages": 688,
+  "created_at": "2025-01-01T00:00:00Z",
+  "updated_at": "2025-01-15T00:00:00Z"
+}
+```
+
+### Genre / Author Discovery
+`GET /api/books/genres/` → `["Fiction", "Science Fiction", ...]`
+
+`GET /api/books/authors/` → `["Frank Herbert", "Ursula K. Le Guin", ...]`
+
+## Frontend Components
+
+### LibraryPage (enhanced)
+- **Search bar** at top: text input with debounced `onChange` → calls API with `q` param
+- **Filter row**: genre dropdown, author dropdown, reading status dropdown
+  - Genre/Author dropdowns populated from `/api/books/genres/` and `/api/books/authors/`
+  - Reading status uses static enum values (`READING_STATUS_OPTIONS`)
+- **Results grid**: card layout showing cover, title, author, reading status badge
+- **Empty state**: "No books found" with clear message when results are empty
+- **Loading state**: spinner/skeleton while fetching
+- **Click card → navigate to** `/books/{id}`
+
+### BookDetailPage (new)
+- Shows full book info: cover, title, author, genre, description, reading status, total pages
+- Back button to return to library
+- Clean, mobile-responsive layout
+
+### API Client — `frontend/src/api/books.ts`
+
+| Method | Endpoint | Returns |
+|--------|----------|---------|
+| `searchBooks(params)` | `GET /api/books/` | `{count, results: BookListItem[]}` |
+| `getBook(id)` | `GET /api/books/{id}/` | `BookDetail` |
+| `getGenres()` | `GET /api/books/genres/` | `string[]` |
+| `getAuthors()` | `GET /api/books/authors/` | `string[]` |
+
+## Routes (Frontend)
+| Path | Component | Auth |
+|------|-----------|------|
+| `/` | LibraryPage | Protected |
+| `/books/:id` | BookDetailPage | Protected |
+
+## Data Flow
+1. User types in search bar → 300ms debounce → `GET /api/books/?q=...`
+2. User selects filter → `GET /api/books/?genre=...&author=...&reading_status=...`
+3. User clicks result → navigate to `/books/:id`
+4. BookDetailPage → `GET /api/books/{id}/`
+
+## Mobile Optimizations
+- Filters collapse into a toggleable panel on small screens
+- Cards stack in single column on mobile
+- Touch-friendly tap targets (min 44px)

docs/frontend/001-customizable-mobile-reading-experience.md

@@ -0,0 +1,246 @@
+# US: Customizable Mobile Reading Experience
+
+**Issue:** https://gitea-dev.codescripters.org/HermesFactory/cloud-reader/issues (TBD)
+
+## Overview
+
+Add a full-screen reading view for ebooks with customizable typography, themes,
+table of contents navigation, and orientation support. Mobile-first, responsive
+design that adapts to any screen size.
+
+---
+
+## Backend Specification
+
+### New Models
+
+#### `apps.books.models.Chapter`
+
+| Field        | Type               | Notes                          |
+|-------------|--------------------|--------------------------------|
+| id          | AutoField (PK)     |                                |
+| book        | FK -> Book         | related_name="chapters"        |
+| title       | CharField(512)     | Chapter title                  |
+| number      | PositiveIntegerField | Chapter ordering / TOC index |
+| content     | TextField          | Chapter text/markdown content  |
+| created_at  | DateTimeField      | auto_now_add                   |
+| updated_at  | DateTimeField      | auto_now                       |
+
+**Constraints:** UniqueConstraint(book, chapter_number)
+**Ordering:** [book, number]
+**Index:** FK to book with db_index
+
+#### `apps.books.models.ReadingProgress`
+
+| Field             | Type               | Notes                          |
+|------------------|--------------------|--------------------------------|
+| id               | AutoField (PK)     |                                |
+| user             | FK -> User         | related_name="reading_progress"|
+| book             | FK -> Book         | related_name="reading_progress"|
+| current_chapter  | PositiveIntegerField | Last chapter number          |
+| current_position | PositiveIntegerField | Position within chapter (paragraph) |
+| percentage       | FloatField         | 0.0 - 100.0 overall progress  |
+| updated_at       | DateTimeField      | auto_now                       |
+
+**Constraints:** UniqueConstraint(user, book)
+**Indexes:** (user, book) composite, (user) filter for list queries
+
+#### `apps.reader.models.ReadingSettings`
+
+New app `apps/reader/` for reading preferences, isolated from book data model.
+
+| Field              | Type               | Notes                         |
+|-------------------|--------------------|-------------------------------|
+| id                | AutoField (PK)     |                               |
+| user              | OneToOneField -> User | related_name="reading_settings" |
+| font_family       | CharField(32)      | "sans-serif", "serif", "monospace" |
+| font_size         | PositiveSmallIntegerField | 12-32, default 18       |
+| line_height       | FloatField         | 1.2 - 2.0, default 1.6       |
+| margin_width      | PositiveSmallIntegerField | 8-48, default 16 (px)   |
+| background_color  | CharField(7)       | Hex color, default "#f5f0eb" |
+| text_color        | CharField(7)       | Hex color, default "#1a1a1a" |
+| brightness        | PositiveSmallIntegerField | 0-100, default 100       |
+| orientation_lock  | CharField(16)      | "auto", "portrait", "landscape" |
+| theme             | CharField(32)      | "sepia", "dark", "light", "paper" |
+| created_at        | DateTimeField      | auto_now_add                  |
+| updated_at        | DateTimeField      | auto_now                      |
+
+### New API Endpoints
+
+All under `/api/` prefix, authenticated with JWT.
+
+#### Reader Settings (`/api/reader/settings/`)
+
+| Method | URL                          | Action                    |
+|--------|------------------------------|---------------------------|
+| GET    | /api/reader/settings/        | Get current user settings |
+| PUT    | /api/reader/settings/        | Create/update settings    |
+| PATCH  | /api/reader/settings/        | Partial update settings   |
+
+- Single-object endpoint (one settings record per user, auto-created on first GET)
+- Validation: font_size 12-32, line_height 1.2-2.0, margin_width 8-48
+
+#### Reading Progress (`/api/books/{id}/progress/`)
+
+| Method | URL                                    | Action                       |
+|--------|----------------------------------------|------------------------------|
+| GET    | /api/books/{id}/progress/              | Get reading progress for book|
+| PUT    | /api/books/{id}/progress/              | Create/update reading progress|
+
+- Nested under book detail
+- Auto-creates progress record on first PUT
+
+#### Chapters (`/api/books/{id}/chapters/`)
+
+| Method | URL                                    | Action                       |
+|--------|----------------------------------------|------------------------------|
+| GET    | /api/books/{id}/chapters/              | List chapters for book (TOC) |
+| GET    | /api/books/{id}/chapters/{number}/     | Get specific chapter content |
+
+- Ordering by `number`
+- Used by frontend TOC sidebar and content loading
+
+---
+
+## Frontend Specification
+
+### New Pages
+
+#### `/reader/:bookId` — ReadingPage
+
+Full-screen reading view with:
+- Chapter content display (left/right swiping or scroll)
+- Bottom toolbar: TOC toggle, Settings toggle, Progress indicator
+- Top bar: Back button, Book title, Chapter title
+- Swipe/tap/page navigation between chapters
+
+### New Components
+
+#### `ReaderToolbar`
+- Fixed bottom toolbar
+- TOC button (opens TOC drawer)
+- Settings/theme button (opens settings panel)
+- Progress bar showing overall reading progress
+
+#### `TableOfContents`
+- Slide-in drawer from left
+- Lists all chapters with current chapter highlighted
+- Tap on chapter to navigate
+- Shows reading progress per chapter
+
+#### `ReadingSettingsPanel`
+- Slide-in drawer from right (or bottom sheet on mobile)
+- Controls:
+  - Theme presets: Sepia, Dark, Light, Paper
+  - Font family: Sans-serif, Serif, Monospace
+  - Font size slider (12-32)
+  - Line height slider (1.2-2.0)
+  - Margin/padding control
+  - Orientation lock toggle (Auto / Portrait / Landscape)
+- All changes persist immediately via API
+- LocalStorage fallback when offline
+
+### New Hooks
+
+#### `useReadingSettings(bookId)`
+- Fetches user reading settings from API
+- Returns current settings + update function
+- Applies CSS custom properties to document root
+- Falls back to defaults if API unavailable
+
+#### `useChapters(bookId)`
+- Fetches chapter list for TOC
+- Returns chapters array, current chapter, navigate function
+- Prefetches next/prev chapter content
+
+#### `useReadingProgress(bookId)`
+- Fetches/updates reading progress
+- Auto-saves position on chapter change and periodic interval
+
+### New Types
+
+```typescript
+interface Chapter {
+  id: number;
+  book: number;
+  title: string;
+  number: number;
+  content?: string; // Only present when fetching individual chapter
+}
+
+interface ChapterSummary {
+  id: number;
+  book: number;
+  title: string;
+  number: number;
+}
+
+interface ReadingSettings {
+  font_family: "sans-serif" | "serif" | "monospace";
+  font_size: number;
+  line_height: number;
+  margin_width: number;
+  background_color: string;
+  text_color: string;
+  brightness: number;
+  orientation_lock: "auto" | "portrait" | "landscape";
+  theme: "sepia" | "dark" | "light" | "paper";
+}
+
+interface ReadingProgress {
+  current_chapter: number;
+  current_position: number;
+  percentage: number;
+  updated_at: string;
+}
+```
+
+### CSS / Theming
+
+Reading view uses CSS custom properties driven by reading settings:
+
+```css
+:root {
+  --reader-bg: var(--bg-color, #f5f0eb);
+  --reader-text: var(--text-color, #1a1a1a);
+  --reader-font-family: var(--font-family, "Georgia", serif);
+  --reader-font-size: var(--font-size, 18px);
+  --reader-line-height: var(--line-height, 1.6);
+  --reader-margin: var(--margin-width, 16px);
+}
+```
+
+Three theme presets:
+- **Sepia**: `bg:#f5f0eb`, `text:#1a1a1a` — warm, easy on eyes
+- **Dark**: `bg:#1a1a2e`, `text:#e0e0e0` — for low-light reading
+- **Light**: `bg:#ffffff`, `text:#1a1a1a` — crisp and clean
+- **Paper**: `bg:#e8e0d4`, `text:#2c2c2c` — book-like feel
+
+### Orientation Support
+
+- CSS `@media (orientation: portrait)` and `@media (orientation: landscape)` breakpoints
+- Reading settings panel includes orientation lock toggle
+- On mobile, landscape mode expands content horizontally with wider margins
+- Portrait mode stacks controls vertically for thumb-reachable UI
+
+### Routing
+
+Add to App.tsx:
+```
+/                     → LibraryPage
+/books/:bookId        → BookDetailPage
+/reader/:bookId       → ReadingPage
+```
+
+---
+
+## Implementation Order
+
+1. Backend models + migrations (Chapter, ReadingProgress, ReadingSettings)
+2. Backend serializers + views + URLs
+3. Frontend types + API client
+4. Frontend hooks (useReadingSettings, useChapters, useReadingProgress)
+5. Frontend components (ReadingSettingsPanel, TableOfContents, ReaderToolbar)
+6. Frontend page (ReadingPage)
+7. Routing updates
+8. CSS / theming

docs/frontend/011-react-reader-web.md

@@ -0,0 +1,73 @@
+# 011 — Web reader (react-reader)
+
+**Status:** Implemented  
+**Created:** 2026-06-03
+
+## Objective
+
+Replace the custom HTML chapter reader with [react-reader](https://github.com/gerhardsletten/react-reader) (epub.js) for paginated EPUB reading in the web app. Keep the existing toolbar and settings panel chrome. Block PDFs from the in-browser reader.
+
+## Architecture
+
+```
+Library (EPUB only) → /read/:id → ReadingPage
+  → GET /api/books/ebooks/{id}/        (metadata, format guard)
+  → GET /api/books/ebooks/{id}/file/   (authenticated EPUB blob)
+  → ReactReader (blob URL + CFI location)
+  → PATCH /api/books/ebooks/{id}/progress/  (epub_location + percentage)
+```
+
+EPUB files are fetched with JWT via the API, converted to a blob URL client-side, and passed to react-reader. This avoids unauthenticated `/media/` URLs and CORS issues in dev.
+
+## Backend changes
+
+### `GET /api/books/ebooks/{id}/file/`
+
+- Authenticated, owner-only
+- Returns `FileResponse` with `Content-Type: application/epub+zip`
+- Returns `400` if format is not `epub`
+
+### `ReadingProgress.epub_location`
+
+| Field | Type | Notes |
+|-------|------|-------|
+| `epub_location` | CharField(2048) | EPUB CFI string for resume position |
+
+Exposed on `GET/PATCH /api/books/ebooks/{id}/progress/` and in `EBookDetail.progress`.
+
+`current_position` stores whole-book percentage (0–100) derived from epub.js locations.
+
+## Frontend changes
+
+| File | Change |
+|------|--------|
+| `pages/ReadingPage.tsx` | `ReactReader` replaces chapter HTML rendering |
+| `hooks/useEpubReader.ts` | Blob load, CFI state, debounced progress save |
+| `utils/epubRendition.ts` | Theme/font application via `getRendition` |
+| `api/books.ts` | `getEpubFile(id)` |
+| `pages/Library.tsx` | Block PDF open with notice |
+| `App.tsx` | Single route `/read/:id`; `/reader/:id` redirects |
+
+### Removed (web-only)
+
+- `useChapters.ts`, `TableOfContents.tsx`, `Reader.tsx`, `useReadingProgress.ts`
+
+Backend `/toc/` and `/content/` endpoints remain for mobile/API consumers.
+
+## EPUB-only policy
+
+- Library: clicking a PDF shows a dismissible notice; no navigation to reader
+- ReadingPage: deep-link guard if `format !== 'epub'`
+- Upload still accepts PDF for storage; web reader is EPUB-only
+
+## Dependencies
+
+- Frontend: `react-reader` (^2.0.15)
+
+## Verification
+
+1. Open an EPUB from library → paginated reading, swipe/tap page turns, built-in TOC
+2. Close and reopen → resumes at saved CFI
+3. Change theme/font in settings → applies inside epub iframe
+4. Click a PDF in library → notice shown, reader not opened
+5. `GET /api/books/ebooks/{id}/file/` without auth → 401

docs/frontend/012-library-context-menu.md

@@ -0,0 +1,56 @@
+# 012 — Library book context menu
+
+**Status:** Implemented  
+**Created:** 2026-06-03
+
+## Objective
+
+Add a custom right-click context menu on each book card in the library with **Sync metadata** (Open Library refresh) and **Remove** (delete from library). Show toast notifications for success, warning, and error outcomes.
+
+## Architecture
+
+```
+Library book card (contextmenu)
+  → BookContextMenu
+    → Sync metadata: POST /api/books/ebooks/{id}/enrich-metadata/
+    → Remove: confirm dialog → DELETE /api/books/ebooks/{id}/
+  → ToastProvider (app-wide) → success | warning | error toasts
+```
+
+Backend endpoints already exist; no API changes required.
+
+## Frontend changes
+
+| File | Change |
+|------|--------|
+| `api/books.ts` | `enrichEBookMetadata(id)` → `POST .../enrich-metadata/` |
+| `types/book.ts` | `OpenLibraryMetadata` with `match_status` |
+| `hooks/useToast.tsx` | `ToastProvider`, `showToast({ message, variant })`, auto-dismiss ~4s |
+| `components/ToastContainer.tsx` | Fixed bottom-right toast stack |
+| `components/BookContextMenu.tsx` | Positioned menu; sync + remove actions |
+| `pages/Library.tsx` | `onContextMenu` on cards; local state updates |
+| `App.tsx` | Wrap routes with `ToastProvider` |
+
+## Context menu behavior
+
+- Opens on right-click (`contextmenu`); browser default menu suppressed
+- Position clamped to viewport; closes on outside click, Escape, or scroll
+- **Sync metadata:** updates card title/author/cover from response; toast by `metadata.match_status`:
+  - `matched` → success
+  - `not_found` → warning
+  - other → neutral success
+- **Remove:** `window.confirm` before delete; removes card from list on success
+- Menu clicks do not trigger card navigation to reader
+
+## Dependencies
+
+None (no new npm packages).
+
+## Verification
+
+1. Right-click a book → menu appears at cursor
+2. Sync metadata on a matched book → cover/title may update, success toast
+3. Sync on unmatched book → warning toast, no crash
+4. Remove → confirm → book disappears, success toast
+5. Cancel remove → book stays, menu closes
+6. Left-click still opens reader (EPUB) or PDF notice

docs/frontend/013-i18n-web.md

@@ -0,0 +1,54 @@
+# 013 — Frontend i18n (react-i18n-lite)
+
+**Status:** Implemented  
+**Created:** 2026-06-04
+
+## Objective
+
+Internationalize the web UI in English (`en-US`) and Spanish (`es-ES`) using [react-i18n-lite](https://www.npmjs.com/package/react-i18n-lite).
+
+## Architecture
+
+```
+App.tsx
+  └── I18nProvider (TranslationContainer)
+        ├── resolveDefaultLanguage() — localStorage → navigator → en-US
+        ├── LanguagePersistence — sync setLanguage ↔ localStorage, html[lang]
+        └── AuthProvider → ToastProvider → routes
+```
+
+Components call `useTranslation()` and `t('namespace.key', { interpolation })`.
+
+## Locale files
+
+| File | Purpose |
+|------|---------|
+| `frontend/src/locales/en-US.ts` | English dictionary |
+| `frontend/src/locales/es-ES.ts` | Spanish dictionary |
+| `frontend/src/locales/index.ts` | `locales` map, `SupportedLanguage`, helpers |
+
+Key namespaces: `common`, `auth`, `library`, `contextMenu`, `toast`, `settings`, `reader`, `addBook`, `bookDetail`, `search`, `annotations`.
+
+## Language selection
+
+- **Settings page** — UI Language dropdown (English / Español)
+- **Persistence** — `localStorage` key `cloud-reader.locale`
+- **Default** — saved preference, else `navigator.language` (`es*` → `es-ES`), else `en-US`
+
+## Scope
+
+**Translated:** All user-facing chrome (library, auth, reader toolbar/settings/TOC, add book, book detail, annotations, context menu, toasts).
+
+**Not translated:** EPUB body content, API error bodies, backend `reading_status_display`, Open Library metadata fields.
+
+## Dependencies
+
+- `react-i18n-lite` (^1.0.10)
+
+## Verification
+
+1. Open app — labels match browser or saved language
+2. Settings → switch to Español — library/auth update without reload
+3. Refresh — language persists
+4. Context menu and toasts show translated strings
+5. `yarn build` succeeds

docs/frontend/014-library-reading-progress.md

@@ -0,0 +1,46 @@
+# 014 — Library reading progress badges
+
+**Status:** Implemented  
+**Created:** 2026-06-04
+
+## Objective
+
+Show accurate reading state on library book cards using saved EPUB progress instead of always displaying "Want to Read" (`Quiero leer`).
+
+## Data source
+
+- `GET /api/books/ebooks/` returns `progress` (0–100) from `ReadingProgress.current_position` via `EBookListSerializer.get_progress`.
+- Progress is updated by the web reader (`useEpubReader` → `PATCH .../progress/`).
+
+## Display rules
+
+| Progress | `opened` | Badge | Cover extra |
+|----------|----------|-------|-------------|
+| `null` or `0` | false | Want to Read | — |
+| `0` | true | Opened | — |
+| `1–98` | — | Reading · N% | Green progress bar on cover |
+| `≥ 99` | — | Finished | — |
+
+**Opened** is set when the reader first displays (CFI saved, 0% progress). Turning pages moves to **Reading**.
+
+Threshold constant: `FINISHED_PROGRESS_THRESHOLD = 99` in `frontend/src/utils/libraryStatus.ts`.
+
+## Frontend changes
+
+| File | Change |
+|------|--------|
+| `utils/libraryStatus.ts` | `deriveReadingStatus`, `normalizeProgressPercent` |
+| `pages/Library.tsx` | Map API progress → status; badge labels; client-side status filter |
+| `locales/en-US.ts`, `es-ES.ts` | `library.readingStatus.readingWithProgress` |
+| `pages/Library.module.css` | Cover progress bar styles |
+
+## Status filter
+
+The reading-status filter in the library panel now filters client-side by derived status (`want_to_read`, `reading`, `finished`).
+
+## Verification
+
+1. New upload → **Want to Read** / **Quiero leer**
+2. Partial read → **Reading · N%** + progress bar
+3. Near end (≥ 99%) → **Finished** / **Terminado**
+4. Filters by Leyendo / Terminado work as expected

docs/frontend/015-epub-bookmarks-notes.md

@@ -0,0 +1,83 @@
+# 015 — EPUB bookmarks and notes (physical-book UX)
+
+**Status:** Implemented  
+**Created:** 2026-06-04
+
+## Objective
+
+Let users select passage text while reading an EPUB, save a bookmark (with optional thought), list markers in chapter order, and jump back to the exact location. Global view groups markers by book in a Reddit-style thread layout.
+
+## Fix: AnnotationsProvider
+
+`AnnotationsProvider` wraps all routes in [`App.tsx`](frontend/src/App.tsx) so `/bookmarks-notes` and the reader can use `useAnnotations()`.
+
+## Data model
+
+`Bookmark` (annotations app) references **`books.EBook`**, not catalog `Book`:
+
+| Field | Purpose |
+|-------|---------|
+| `ebook` | FK to uploaded ebook |
+| `epub_cfi` | EPUB CFI anchor |
+| `chapter_index` | Spine index for sort order |
+| `chapter_title` | Display label |
+| `location_text` | Selected passage quote |
+| `content` | Optional user thought (empty = bookmark only) |
+| `page` | Legacy display field (`chapter_index + 1`) |
+
+Unique: `(user, ebook, epub_cfi)`.
+
+Default API ordering: `chapter_index`, `epub_cfi`.
+
+Legacy `Note` model remains for old API; new UX uses `Bookmark.content` only.
+
+## Reader flow
+
+```mermaid
+sequenceDiagram
+  participant User
+  participant EpubView
+  participant Popover
+  participant API
+  User->>EpubView: Select text
+  EpubView->>Popover: Show near selection
+  User->>Popover: Save optional thought
+  Popover->>API: POST /annotations/bookmarks/
+```
+
+1. Text selection via epub.js `selected` event and content `mouseup` hook.
+2. [`SelectionPopover`](frontend/src/components/reader/SelectionPopover.tsx) — floating UI, optional textarea.
+3. Toolbar bookmark icon opens [`BookMarkersPanel`](frontend/src/components/reader/BookMarkersPanel.tsx) (current ebook only).
+4. “Go to passage” sets reader `location` to stored CFI (`/read/:id` with router state).
+
+## Global page (`/bookmarks-notes`)
+
+[`MarkerThreadsView`](frontend/src/components/annotations/MarkerThreadsView.tsx):
+
+- Groups markers by ebook (collapsible book rows).
+- Within each book: chapter order, passage as blockquote, thought indented below (Reddit-style).
+- Optional filter: `/bookmarks-notes/:ebookId`.
+
+## API
+
+- `GET /api/annotations/bookmarks/?ebook={id}`
+- `POST /api/annotations/bookmarks/` — body: `ebook`, `epub_cfi`, `chapter_index`, `chapter_title`, `location_text`, `content`
+
+## i18n
+
+New keys under `annotations.*` (EN/ES): `saveMarker`, `thoughtPlaceholder`, `bookmarkOnly`, `selectTextHint`, `goToPassage`, `inBookPanel`, `markerCount`, etc.
+
+## Verification
+
+1. `/bookmarks-notes` loads without provider error.
+2. Select text in reader → popover → save with/without thought.
+3. Markers appear in reader panel and global page under correct book, in chapter order.
+4. “Go to passage” opens the correct location.
+
+See also [016 — Bookmark reading anchor](016-bookmark-reading-anchor.md) for preserving reading position while peeking at bookmarks.
+
+## Out of scope
+
+- PDF selection
+- Multiple replies per passage
+- Migrating legacy `Note` rows into `Bookmark`

docs/frontend/016-bookmark-reading-anchor.md

@@ -0,0 +1,87 @@
+# 016 — Bookmark reading anchor
+
+**Status:** Implemented  
+**Created:** 2026-06-04  
+**See also:** [015 — EPUB bookmarks and notes](015-epub-bookmarks-notes.md)
+
+## Objective
+
+Let users jump to a bookmark to review a passage without overwriting their true reading position. While peeking, show a high-visibility control to return to where they were reading.
+
+## Definitions
+
+| Term | Meaning |
+|------|---------|
+| **Reading anchor** | EPUB CFI (+ optional %) captured immediately before a bookmark peek |
+| **Peek mode** | Temporary view at a bookmark location; server `ReadingProgress` is not updated |
+| **Resume** | Jump back to the reading anchor and re-enable progress persistence |
+
+## Problem (before)
+
+“Go to passage” called `jumpToCfi`, which triggered `locationChanged` and debounced `PATCH /books/ebooks/{id}/progress/`, replacing `epub_location` and `current_position` with the bookmark. Library progress and the next reading session started at the bookmark instead of the real position.
+
+## Triggers (enter peek mode)
+
+- In-reader: **Go to passage** in [`BookMarkersPanel`](../frontend/src/components/reader/BookMarkersPanel.tsx)
+- Global: **Go to passage** on [`/bookmarks-notes`](../frontend/src/components/annotations/BookmarksNotesPage.tsx) → `/read/:id` with `state.epubLocation` (bookmark CFI)
+
+## Non-triggers
+
+- Table of contents navigation
+- Prev / next page buttons
+- Creating a new bookmark from text selection
+- Opening the book normally from the library (no `epubLocation` in router state)
+
+## UX
+
+### Resume control
+
+- Component: [`ResumeReadingButton`](../frontend/src/components/reader/ResumeReadingButton.tsx)
+- Visible only when `isBookmarkPeekActive && readingAnchor != null`
+- Position: right edge, **above** the next-page chevron (`.reader-page-nav--next`)
+- Style: warm accent (`#ea580c` / `#f97316`), white label/icon; distinct from muted gray nav buttons
+- Action: `resumeReadingAnchor()` — hides control, returns to anchor CFI
+- i18n: `reader.resumeReading`, `reader.resumeReadingAria`
+
+### Anchor policy
+
+- First anchor is captured when peek starts; **additional “Go to passage” clicks while peeking do not replace the anchor** until the user resumes or leaves the reader.
+
+## Progress rules
+
+| Mode | `PATCH .../progress/` |
+|------|------------------------|
+| Normal reading | Yes (debounced on `locationChanged`, sync after locations ready) |
+| Bookmark peek | **No** — `flushProgress` / `scheduleProgress` no-op |
+| After resume | Yes — flush anchor CFI and percentage once |
+
+### Load from bookmarks page
+
+1. Fetch saved `ReadingProgress` from API.
+2. If `state.epubLocation` is set and saved `epub_location` exists → store saved location as **anchor**, set peek mode, open at bookmark CFI.
+3. Do not persist bookmark location as progress during peek.
+
+### In-reader peek
+
+1. Capture current `location` (CFI) as anchor (if valid).
+2. Enter peek mode, jump to bookmark CFI.
+
+## API
+
+No backend changes in v1. Anchor is session-only in [`useEpubReader`](../frontend/src/hooks/useEpubReader.ts).
+
+## Verification
+
+1. Read to ~30%, open markers, **Go to passage** on an early bookmark → jumps; after debounce, library/API progress still reflects ~30% (not bookmark).
+2. Orange **Back to reading** appears above the next chevron only during peek.
+3. Tap resume → returns to ~30%; button hides; progress saves resume.
+4. From `/bookmarks-notes`, **Go to passage** → peek + resume using saved progress as anchor.
+5. TOC / prev / next do not show the resume button.
+6. EN/ES strings present.
+
+## Out of scope
+
+- PDF reader
+- Multiple anchor history stack
+- Backend `resume_epub_location` field
+- Peek mode for TOC jumps