Resolve merge conflicts for PR #25: customizable mobile reading experience

- Backend: Replace PR's Book-only models with main's full models
  (EBook, BookChapter, DownloadRecord, ReadingProgress, ReadingSettings)
- Backend: Add reader app (ReadingSettings model, serializer, view, URL)
- Frontend: Port reader feature files from web/ to frontend/ (api, hooks,
  components/reader/, pages/ReadingPage, types/reader, reader.css)
- Frontend: Add /read/:id route to App.tsx for chapter-based reading view
- All imports adjusted for frontend/src directory structure

.gitignore

@@ -1,34 +0,0 @@
-# Python
-__pycache__/
-*.py[cod]
-*.egg-info/
-dist/
-*.egg
-.venv/
-venv/
-*.sqlite3
-
-# Node
-node_modules/
-dist/
-build/
-.yarn/
-yarn-error.log
-
-# IDE
-.vscode/
-.idea/
-*.swp
-*.swo
-
-# OS
-.DS_Store
-Thumbs.db
-
-# Environment
-.env
-.env.local
-.env.production
-
-# Build artifacts (generated)
-frontend/dist/

README.md

@@ -0,0 +1,38 @@
+# Cloud Reader
+
+A full-stack cloud-based e-book reader application with cross-device synchronization.
+
+## Architecture
+
+- **Backend**: Django 5.x + Django REST Framework
+- **Frontend**: React with TypeScript
+- **Database**: PostgreSQL
+- **Monorepo**: Yarn workspaces
+
+## Getting Started
+
+### Prerequisites
+- Python 3.12+
+- Node.js 20+
+- PostgreSQL 15+
+
+### Backend Setup
+```bash
+cd backend
+python -m venv .venv
+source .venv/bin/activate
+pip install -r requirements.txt
+python manage.py migrate
+python manage.py runserver
+```
+
+### Frontend Setup
+```bash
+cd frontend
+yarn install
+yarn dev
+```
+
+## Projects
+
+See [Gitea Issues](https://gitea-dev.codescripters.org/crisleo-hermes/cloud-reader/issues) for the full roadmap.

api/Dockerfile

@@ -0,0 +1,18 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libpq-dev gcc && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY pyproject.toml ./
+RUN pip install uv && uv sync --frozen
+
+COPY . .
+
+RUN mkdir -p media
+
+EXPOSE 8000
+
+CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]

api/books/admin.py

@@ -0,0 +1,20 @@
+from django.contrib import admin
+
+from books.models import Book, ReadingProgress, ReadingSettings
+
+
+@admin.register(Book)
+class BookAdmin(admin.ModelAdmin):
+    list_display = ["title", "author", "user", "created_at"]
+    list_filter = ["created_at", "user"]
+    search_fields = ["title", "author"]
+
+
+@admin.register(ReadingProgress)
+class ReadingProgressAdmin(admin.ModelAdmin):
+    list_display = ["book", "user", "current_position", "updated_at"]
+
+
+@admin.register(ReadingSettings)
+class ReadingSettingsAdmin(admin.ModelAdmin):
+    list_display = ["user", "font_size", "font_style", "background_color"]

api/books/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class BooksConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "books"

api/books/management/__init__.py

@@ -0,0 +1 @@
+# management/__init__.py

api/books/management/commands/__init__.py

@@ -0,0 +1 @@
+# management/commands/__init__.py

api/books/management/commands/seed_books.py

@@ -0,0 +1,134 @@
+"""
+Management command to seed sample book data for development and testing.
+"""
+from __future__ import annotations
+
+from typing import Any
+
+from django.core.management.base import BaseCommand
+
+from books.models import Book, ReadingStatus
+
+SAMPLE_BOOKS: list[dict[str, Any]] = [
+    {
+        "title": "The Great Gatsby",
+        "author": "F. Scott Fitzgerald",
+        "genre": "Classic Literature",
+        "description": "A story of the mysteriously wealthy Jay Gatsby and his love for the beautiful Daisy Buchanan.",
+        "reading_status": ReadingStatus.FINISHED,
+    },
+    {
+        "title": "To Kill a Mockingbird",
+        "author": "Harper Lee",
+        "genre": "Classic Literature",
+        "description": "The unforgettable novel of a childhood in a sleepy Southern town and the crisis of conscience that rocked it.",
+        "reading_status": ReadingStatus.FINISHED,
+    },
+    {
+        "title": "1984",
+        "author": "George Orwell",
+        "genre": "Science Fiction",
+        "description": "A dystopian social science fiction novel and cautionary tale about the future of totalitarianism.",
+        "reading_status": ReadingStatus.READING,
+    },
+    {
+        "title": "Dune",
+        "author": "Frank Herbert",
+        "genre": "Science Fiction",
+        "description": "Set on the desert planet Arrakis, it is one of the world's best-selling science fiction novels.",
+        "reading_status": ReadingStatus.FINISHED,
+    },
+    {
+        "title": "The Hobbit",
+        "author": "J.R.R. Tolkien",
+        "genre": "Fantasy",
+        "description": "Bilbo Baggins is swept into a quest to reclaim the lost Dwarf Kingdom of Erebor from the fearsome dragon Smaug.",
+        "reading_status": ReadingStatus.FINISHED,
+    },
+    {
+        "title": "Pride and Prejudice",
+        "author": "Jane Austen",
+        "genre": "Romance",
+        "description": "A romantic novel of manners that follows the character development of Elizabeth Bennet.",
+        "reading_status": ReadingStatus.WANT_TO_READ,
+    },
+    {
+        "title": "The Martian",
+        "author": "Andy Weir",
+        "genre": "Science Fiction",
+        "description": "An astronaut becomes stranded alone on Mars and must find a way to signal that he is alive.",
+        "reading_status": ReadingStatus.READING,
+    },
+    {
+        "title": "The Catcher in the Rye",
+        "author": "J.D. Salinger",
+        "genre": "Classic Literature",
+        "description": "The story of Holden Caulfield's experiences in New York City after being expelled from prep school.",
+        "reading_status": ReadingStatus.DNF,
+    },
+    {
+        "title": "The Alchemist",
+        "author": "Paulo Coelho",
+        "genre": "Philosophy",
+        "description": "A young Andalusian shepherd follows his dream to find treasure at the Egyptian pyramids.",
+        "reading_status": ReadingStatus.WANT_TO_READ,
+    },
+    {
+        "title": "Neuromancer",
+        "author": "William Gibson",
+        "genre": "Science Fiction",
+        "description": "The novel that launched the cyberpunk genre, following washed-up computer hacker Henry Case.",
+        "reading_status": ReadingStatus.FINISHED,
+    },
+    {
+        "title": "The Name of the Wind",
+        "author": "Patrick Rothfuss",
+        "genre": "Fantasy",
+        "description": "The tale of the magically gifted young man who grows to be the most notorious wizard his world has ever seen.",
+        "reading_status": ReadingStatus.READING,
+    },
+    {
+        "title": "Gone Girl",
+        "author": "Gillian Flynn",
+        "genre": "Thriller",
+        "description": "A mystery thriller about a wife's disappearance on the day of her fifth wedding anniversary.",
+        "reading_status": ReadingStatus.FINISHED,
+    },
+    {
+        "title": "Sapiens",
+        "author": "Yuval Noah Harari",
+        "genre": "Non-Fiction",
+        "description": "A brief history of humankind, exploring how biology and history have defined us.",
+        "reading_status": ReadingStatus.FINISHED,
+    },
+    {
+        "title": "The Road",
+        "author": "Cormac McCarthy",
+        "genre": "Post-Apocalyptic",
+        "description": "A father and his young son walk alone through burned America heading toward the coast.",
+        "reading_status": ReadingStatus.WANT_TO_READ,
+    },
+    {
+        "title": "The Three-Body Problem",
+        "author": "Cixin Liu",
+        "genre": "Science Fiction",
+        "description": "The first novel in the Remembrance of Earth's Past trilogy, a blend of physics and alien contact.",
+        "reading_status": ReadingStatus.READING,
+    },
+]
+
+
+class Command(BaseCommand):
+    """Seed the database with sample books."""
+
+    help = "Seeds the database with sample books for development and testing."
+
+    def handle(self, *args: Any, **options: Any) -> str | None:
+        for i, book_data in enumerate(SAMPLE_BOOKS):
+            Book.objects.get_or_create(
+                title=book_data["title"],
+                author=book_data["author"],
+                defaults=book_data,
+            )
+        count = Book.objects.count()
+        self.stdout.write(self.style.SUCCESS(f"Seeded {count} books into the database."))

api/books/migrations/0001_initial.py

@@ -0,0 +1,56 @@
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies: list = []
+
+    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=500)),
+                ("author", models.CharField(db_index=True, max_length=300)),
+                ("genre", models.CharField(db_index=True, max_length=100)),
+                ("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,
+                    ),
+                ),
+                ("cover_url", models.URLField(blank=True, default="")),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                "ordering": ["title"],
+                "indexes": [
+                    models.Index(
+                        fields=["title", "author", "genre"],
+                        name="books_book_title_2cc25e_idx",
+                    )
+                ],
+            },
+        ),
+    ]

api/books/migrations/__init__.py

@@ -0,0 +1 @@
+# migrations/__init__.py

api/books/models.py

@@ -0,0 +1,111 @@
+from enum import StrEnum
+from pathlib import Path
+
+from django.conf import settings
+from django.core.validators import FileExtensionValidator
+from django.db import models
+from django.db.models.signals import post_delete
+from django.dispatch import receiver
+
+
+class FontStyle(StrEnum):
+    SANS_SERIF = "sans-serif"
+    SERIF = "serif"
+    MONOSPACE = "monospace"
+
+
+class BackgroundColor(StrEnum):
+    WHITE = "#ffffff"
+    SEPIA = "#f4e4c1"
+    DARK = "#1a1a2e"
+    GREEN = "#c7edcc"
+
+
+class Book(models.Model):
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="books",
+    )
+    title = models.CharField(max_length=512)
+    author = models.CharField(max_length=256, blank=True, default="")
+    file = models.FileField(
+        upload_to="books/%Y/%m/%d/",
+        validators=[FileExtensionValidator(allowed_extensions=["epub", "pdf"])],
+    )
+    cover_image = models.ImageField(upload_to="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:
+        ordering = ["-created_at"]
+        indexes = [
+            models.Index(fields=["user", "-created_at"]),
+        ]
+
+    def __str__(self) -> str:
+        return self.title
+
+    def filename(self) -> str:
+        return Path(self.file.name).name
+
+
+@receiver(post_delete, sender=Book)
+def _auto_delete_file_on_delete(sender: type[Book], instance: Book, **kwargs: object) -> None:
+    """Delete the uploaded file when the Book record is deleted."""
+    if instance.file:
+        instance.file.delete(save=False)
+    if instance.cover_image:
+        instance.cover_image.delete(save=False)
+
+
+class ReadingProgress(models.Model):
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="reading_progress",
+    )
+    book = models.OneToOneField(
+        Book,
+        on_delete=models.CASCADE,
+        related_name="reading_progress",
+    )
+    current_position = models.FloatField(default=0.0)
+    """Position in the book as a percentage (0.0 to 100.0)"""
+    last_page = models.IntegerField(default=0)
+    """Last page/paragraph index for granular tracking"""
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        verbose_name_plural = "reading progress"
+        unique_together = [("user", "book")]
+
+    def __str__(self) -> str:
+        return f"{self.book.title} — {self.current_position:.1f}%"
+
+
+class ReadingSettings(models.Model):
+    user = models.OneToOneField(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="reading_settings",
+    )
+    font_size = models.IntegerField(default=18)
+    """Font size in pixels (min 12, max 36)"""
+    font_style = models.CharField(
+        max_length=20,
+        choices=[(s.value, s.name.replace("_", " ").title()) for s in FontStyle],
+        default=FontStyle.SANS_SERIF.value,
+    )
+    background_color = models.CharField(
+        max_length=7,
+        choices=[(c.value, c.name.title()) for c in BackgroundColor],
+        default=BackgroundColor.WHITE.value,
+    )
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        verbose_name_plural = "reading settings"
+
+    def __str__(self) -> str:
+        return f"Settings for {self.user}"

api/books/serializers.py

@@ -0,0 +1,136 @@
+from rest_framework import serializers
+
+from books.models import Book, FontStyle, BackgroundColor, ReadingProgress, ReadingSettings
+
+
+class BookListSerializer(serializers.ModelSerializer):
+    """Lightweight serializer for the library listing — no file or progress data."""
+
+    filename = serializers.CharField(read_only=True)
+    progress = serializers.SerializerMethodField()
+
+    class Meta:
+        model = Book
+        fields = [
+            "id",
+            "title",
+            "author",
+            "filename",
+            "cover_image",
+            "created_at",
+            "progress",
+        ]
+
+    def get_progress(self, obj: Book) -> float | None:
+        try:
+            return obj.reading_progress.current_position
+        except ReadingProgress.DoesNotExist:
+            return None
+
+
+class BookDetailSerializer(serializers.ModelSerializer):
+    """Full serializer for the reader view — includes file URL and progress."""
+
+    filename = serializers.CharField(read_only=True)
+    file_url = serializers.SerializerMethodField()
+    progress = serializers.SerializerMethodField()
+
+    class Meta:
+        model = Book
+        fields = [
+            "id",
+            "title",
+            "author",
+            "filename",
+            "file_url",
+            "cover_image",
+            "created_at",
+            "updated_at",
+            "progress",
+        ]
+
+    def get_file_url(self, obj: Book) -> str:
+        request = self.context.get("request")
+        if request and obj.file:
+            return request.build_absolute_uri(obj.file.url)
+        return ""
+
+    def get_progress(self, obj: Book) -> dict | None:
+        try:
+            rp = obj.reading_progress
+            return {
+                "current_position": rp.current_position,
+                "last_page": rp.last_page,
+            }
+        except ReadingProgress.DoesNotExist:
+            return None
+
+
+class BookUploadSerializer(serializers.ModelSerializer):
+    """Serializer for uploading a new book."""
+
+    class Meta:
+        model = Book
+        fields = ["title", "author", "file", "cover_image"]
+        extra_kwargs = {
+            "title": {"required": True},
+            "file": {"required": True},
+        }
+
+    def validate_file(self, value: object) -> object:
+        import os
+        if isinstance(value, type(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: dict) -> Book:
+        validated_data["user"] = self.context["request"].user
+        return super().create(validated_data)
+
+
+class ReadingProgressSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ReadingProgress
+        fields = ["current_position", "last_page"]
+        extra_kwargs = {
+            "current_position": {"required": True, "min_value": 0.0, "max_value": 100.0},
+        }
+
+    def validate_current_position(self, value: float) -> float:
+        if value < 0.0 or value > 100.0:
+            raise serializers.ValidationError(
+                "Position must be between 0.0 and 100.0."
+            )
+        return value
+
+
+class ReadingSettingsSerializer(serializers.ModelSerializer):
+    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
+
+    def validate_font_style(self, value: str) -> str:
+        valid = [s.value for s in FontStyle]
+        if value not in valid:
+            raise serializers.ValidationError(
+                f"Font style must be one of: {', '.join(valid)}"
+            )
+        return value
+
+    def validate_background_color(self, value: str) -> str:
+        valid = [c.value for c in BackgroundColor]
+        if value not in valid:
+            raise serializers.ValidationError(
+                f"Background color must be one of: {', '.join(valid)}"
+            )
+        return value

api/books/urls.py

@@ -0,0 +1,15 @@
+from django.urls import include, path
+from rest_framework.routers import DefaultRouter
+
+from books.views import BookViewSet, ReadingSettingsViewSet
+
+router = DefaultRouter()
+router.register(r"books", BookViewSet, basename="book")
+
+urlpatterns = [
+    path("", include(router.urls)),
+    path("settings/", ReadingSettingsViewSet.as_view({
+        "get": "list",
+        "patch": "partial_update",
+    }), name="reading-settings"),
+]

api/books/views.py

@@ -0,0 +1,88 @@
+from django.shortcuts import get_object_or_404
+from rest_framework import parsers, permissions, status, viewsets
+from rest_framework.decorators import action
+from rest_framework.request import Request
+from rest_framework.response import Response
+
+from books.models import Book, ReadingProgress, ReadingSettings
+from books.serializers import (
+    BookDetailSerializer,
+    BookListSerializer,
+    BookUploadSerializer,
+    ReadingProgressSerializer,
+    ReadingSettingsSerializer,
+)
+
+
+class IsBookOwner(permissions.BasePermission):
+    """Only the owner of a book can access it."""
+
+    def has_object_permission(
+        self, request: Request, view: object, obj: Book
+    ) -> bool:
+        return obj.user == request.user
+
+
+class BookViewSet(viewsets.ModelViewSet):
+    """API endpoint for managing user books."""
+
+    parser_classes = [parsers.MultiPartParser, parsers.FormParser, parsers.JSONParser]
+    permission_classes = [permissions.IsAuthenticated, IsBookOwner]
+
+    def get_serializer_class(self) -> type:
+        if self.action == "create":
+            return BookUploadSerializer
+        if self.action == "list":
+            return BookListSerializer
+        return BookDetailSerializer
+
+    def get_queryset(self):
+        return (
+            Book.objects.filter(user=self.request.user)
+            .select_related("reading_progress", "user")
+            .prefetch_related()
+        )
+
+    @action(detail=True, methods=["get", "patch"])
+    def progress(self, request: Request, pk: int | None = None) -> Response:
+        """Get or update reading progress for a specific book."""
+        book = self.get_object()
+        progress, _created = ReadingProgress.objects.get_or_create(
+            user=request.user,
+            book=book,
+        )
+
+        if request.method == "GET":
+            serializer = ReadingProgressSerializer(progress)
+            return Response(serializer.data)
+
+        serializer = ReadingProgressSerializer(progress, data=request.data, partial=True)
+        serializer.is_valid(raise_exception=True)
+        serializer.save()
+        return Response(serializer.data)
+
+
+class ReadingSettingsViewSet(viewsets.GenericViewSet):
+    """API endpoint for user reading settings."""
+
+    permission_classes = [permissions.IsAuthenticated]
+    serializer_class = ReadingSettingsSerializer
+
+    def get_queryset(self):
+        return ReadingSettings.objects.filter(user=self.request.user)
+
+    def list(self, request: Request) -> Response:
+        settings, _created = ReadingSettings.objects.get_or_create(
+            user=request.user,
+        )
+        serializer = self.get_serializer(settings)
+        return Response(serializer.data)
+
+    def partial_update(self, request: Request) -> Response:
+        settings, _created = ReadingSettings.objects.get_or_create(
+            user=request.user,
+        )
+        serializer = self.get_serializer(settings, data=request.data, partial=True)
+        serializer.is_valid(raise_exception=True)
+        serializer.save()
+        return Response(serializer.data)

api/manage.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main() -> None:
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "project.settings")
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == "__main__":
+    main()

api/project/settings.py

@@ -0,0 +1,109 @@
+import os
+from pathlib import Path
+
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+SECRET_KEY = os.environ.get("DJANGO_SECRET_KEY", "django-insecure-dev-change-me")
+DEBUG = os.environ.get("DJANGO_DEBUG", "True").lower() in ("true", "1", "yes")
+ALLOWED_HOSTS: list[str] = ["*"]
+
+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.authtoken",
+    "corsheaders",
+    # Local
+    "books",
+]
+
+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 = "project.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 = "project.wsgi.application"
+
+# ── Database ──────────────────────────────────────────────
+_database_url = os.environ.get(
+    "DATABASE_URL",
+    "postgres://cloudreader:cloudreader@localhost:5432/cloudreader",
+)
+_db_parts = _database_url.replace("postgres://", "").split("@")
+_credentials, _host_db = _db_parts[0], _db_parts[1]
+_db_user, _db_pass = _credentials.split(":")
+_host_port, _db_name = _host_db.split("/")
+_db_host = _host_port.split(":")[0]
+_db_port = _host_port.split(":")[1] if ":" in _host_port else "5432"
+
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.postgresql",
+        "NAME": _db_name,
+        "USER": _db_user,
+        "PASSWORD": _db_pass,
+        "HOST": _db_host,
+        "PORT": _db_port,
+    }
+}
+
+DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
+
+# ── Auth / Password Validation ────────────────────────────
+AUTH_PASSWORD_VALIDATORS = [
+    {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
+]
+
+# ── DRF ───────────────────────────────────────────────────
+REST_FRAMEWORK = {
+    "DEFAULT_AUTHENTICATION_CLASSES": [
+        "rest_framework.authentication.TokenAuthentication",
+        "rest_framework.authentication.SessionAuthentication",
+    ],
+    "DEFAULT_PERMISSION_CLASSES": [
+        "rest_framework.permissions.IsAuthenticated",
+    ],
+}
+
+# ── CORS ──────────────────────────────────────────────────
+CORS_ALLOW_ALL_ORIGINS = True  # dev only
+
+# ── Media / Uploads ───────────────────────────────────────
+MEDIA_URL = "/media/"
+MEDIA_ROOT = BASE_DIR / "media"
+
+# ── i18n / Static ─────────────────────────────────────────
+LANGUAGE_CODE = "en-us"
+TIME_ZONE = "UTC"
+USE_I18N = True
+USE_TZ = True
+STATIC_URL = "static/"

api/project/urls.py

@@ -0,0 +1,7 @@
+from django.contrib import admin
+from django.urls import include, path
+
+urlpatterns = [
+    path("admin/", admin.site.urls),
+    path("api/", include("books.urls")),
+]

api/project/wsgi.py

@@ -0,0 +1,6 @@
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "project.settings")
+application = get_wsgi_application()

api/pyproject.toml

@@ -0,0 +1,21 @@
+[project]
+name = "api"
+version = "1.0.0"
+description = "Cloud Reader API — Book Search and Discovery"
+requires-python = ">=3.12"
+dependencies = [
+    "django>=5.1,<6.0",
+    "djangorestframework>=3.15,<4.0",
+    "django-cors-headers>=4.4,<5.0",
+    "django-filter>=24.3,<25.0",
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+    "pydantic>=2.0,<3.0",
+    "pydantic-settings>=2.0,<3.0",
+]
+
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools.packages.find]
+include = ["books*", "project*"]

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+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/ba/19/1b9b0e29f30c6d35cb345486df41110984ea67ae69dddbc0e8a100999493/tzdata-2026.2.tar.gz", hash = "sha256:9173fde7d80d9018e02a662e168e5a2d04f87c41ea174b139fbef642eda62d10", size = 198254, upload-time = "2026-04-24T15:22:08.651Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/ce/e4/dccd7f47c4b64213ac01ef921a1337ee6e30e8c6466046018326977efd95/tzdata-2026.2-py2.py3-none-any.whl", hash = "sha256:bbe9af844f658da81a5f95019480da3a89415801f6cc966806612cc7169bffe7", size = 349321, upload-time = "2026-04-24T15:22:05.876Z" },
+]

backend/.env.example

@@ -0,0 +1,8 @@
+# Backend environment (example – never commit real secrets)
+DJANGO_SECRET_KEY=django-insecure-change-me-in-production
+DJANGO_DEBUG=True
+DB_NAME=cloud_reader
+DB_USER=postgres
+DB_PASSWORD=postgres
+DB_HOST=localhost
+DB_PORT=5432

backend/apps/annotations/admin.py

@@ -0,0 +1,19 @@
+from django.contrib import admin
+
+from apps.annotations.models import Bookmark, Note
+
+
+@admin.register(Bookmark)
+class BookmarkAdmin(admin.ModelAdmin):
+    list_display = ("user", "book", "page", "created_at")
+    list_select_related = ("user", "book")
+    search_fields = ("user__email", "book__title", "location_text")
+    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/models.py

@@ -0,0 +1,84 @@
+import uuid
+
+from django.conf import settings
+from django.db import models
+
+
+class Bookmark(models.Model):
+    """A saved location in a book that the user can return to."""
+
+    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,
+    )
+    book = models.ForeignKey(
+        "books.Book",
+        on_delete=models.CASCADE,
+        related_name="bookmarks",
+        db_index=True,
+    )
+    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)
+
+    class Meta:
+        db_table = "annotations_bookmark"
+        verbose_name = "Bookmark"
+        verbose_name_plural = "Bookmarks"
+        ordering = ["-created_at"]
+        constraints = [
+            models.UniqueConstraint(
+                fields=["user", "book", "page"],
+                name="uq_bookmark_user_book_page",
+            )
+        ]
+
+    def __str__(self) -> str:
+        return f"{self.user} @ {self.book} p.{self.page}"
+
+
+class Note(models.Model):
+    """A user-written note attached to a specific location in a book."""
+
+    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 +1,108 @@
+from rest_framework import serializers
+
+from apps.annotations.models import Bookmark, Note
+
+
+class BookmarkSerializer(serializers.ModelSerializer):
+    """Serialize Bookmark data with full details."""
+
+    book_title = serializers.CharField(source="book.title", read_only=True)
+
+    class Meta:
+        model = Bookmark
+        fields = [
+            "id",
+            "book",
+            "book_title",
+            "page",
+            "location_text",
+            "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 BookmarkCreateSerializer(serializers.ModelSerializer):
+    """Serializer used for creating bookmarks. Sets user from request context."""
+
+    class Meta:
+        model = Bookmark
+        fields = ["book", "page", "location_text"]
+
+    def validate_page(self, value: int) -> int:
+        if value < 1:
+            raise serializers.ValidationError("Page must be a positive integer.")
+        return value
+
+    def validate(self, attrs):
+        user = self.context["request"].user
+        if Bookmark.objects.filter(
+            user=user, book=attrs["book"], page=attrs["page"]
+        ).exists():
+            raise serializers.ValidationError(
+                {"page": "A bookmark already exists at this page for this book."}
+            )
+        return attrs
+
+    def create(self, validated_data):
+        validated_data["user"] = self.context["request"].user
+        return super().create(validated_data)
+
+
+class NoteSerializer(serializers.ModelSerializer):
+    """Serialize Note data with full details."""
+
+    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
+
+    def validate_content(self, value: str) -> str:
+        stripped = value.strip()
+        if not stripped:
+            raise serializers.ValidationError("Note content cannot be empty.")
+        return stripped
+
+
+class NoteCreateSerializer(serializers.ModelSerializer):
+    """Serializer used for creating notes. Sets user from request context."""
+
+    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 +1,331 @@
+"""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
+from apps.users.models import User
+
+
+# ---------------------------------------------------------------------------
+# Fixtures
+# ---------------------------------------------------------------------------
+
+@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 bookmark(auth_client, user: User, book: Book) -> Bookmark:
+    return Bookmark.objects.create(
+        user=user,
+        book=book,
+        page=42,
+        location_text="important passage",
+    )
+
+
+@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.",
+    )
+
+
+# ---------------------------------------------------------------------------
+# Bookmark tests
+# ---------------------------------------------------------------------------
+
+class TestBookmarkList:
+    url = reverse("bookmark-list")
+
+    def test_unauthenticated_user_cannot_list(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, book: Book
+    ):
+        Bookmark.objects.create(user=user, book=book, page=1)
+        Bookmark.objects.create(user=other_user, book=book, page=2)
+
+        response = auth_client.get(self.url)
+        assert response.status_code == status.HTTP_200_OK
+        results = response.data["results"]
+        assert len(results) == 1
+        assert results[0]["page"] == 1
+
+    def test_list_returns_empty_when_no_bookmarks(
+        self, auth_client: APIClient
+    ):
+        response = auth_client.get(self.url)
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["count"] == 0
+
+    def test_list_orders_by_newest_first(
+        self, auth_client: APIClient, user: User, book: Book
+    ):
+        b1 = Bookmark.objects.create(user=user, book=book, page=1)
+        b2 = Bookmark.objects.create(user=user, book=book, page=2)
+        response = auth_client.get(self.url)
+        results = response.data["results"]
+        assert results[0]["page"] == 2
+        assert results[1]["page"] == 1
+
+    def test_list_includes_book_title(
+        self, auth_client: APIClient, bookmark: Bookmark
+    ):
+        response = auth_client.get(self.url)
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["results"][0]["book_title"] == "Test Book"
+
+
+class TestBookmarkCreate:
+    url = reverse("bookmark-list")
+
+    def test_create_bookmark(self, auth_client: APIClient, book: Book):
+        data = {"book": str(book.id), "page": 10, "location_text": "key insight"}
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_201_CREATED
+        assert response.data["page"] == 10
+
+    def test_create_bookmark_without_location_text(
+        self, auth_client: APIClient, book: Book
+    ):
+        data = {"book": str(book.id), "page": 5}
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_201_CREATED
+        assert response.data["page"] == 5
+
+    def test_duplicate_bookmark_page_is_rejected(
+        self, auth_client: APIClient, bookmark: Bookmark
+    ):
+        data = {"book": str(bookmark.book.id), "page": bookmark.page}
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_400_BAD_REQUEST
+
+    def test_unauthenticated_user_cannot_create(
+        self, api_client: APIClient, book: Book
+    ):
+        data = {"book": str(book.id), "page": 10}
+        response = api_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_401_UNAUTHORIZED
+
+    def test_invalid_page_rejected(
+        self, auth_client: APIClient, book: Book
+    ):
+        data = {"book": str(book.id), "page": 0}
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_400_BAD_REQUEST
+
+
+class TestBookmarkDetail:
+    def test_get_bookmark(
+        self, auth_client: APIClient, bookmark: Bookmark
+    ):
+        url = reverse("bookmark-detail", args=[str(bookmark.id)])
+        response = auth_client.get(url)
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["page"] == bookmark.page
+
+    def test_cannot_access_other_users_bookmark(
+        self, api_client: APIClient, other_user: User, bookmark: Bookmark
+    ):
+        api_client.force_authenticate(user=other_user)
+        url = reverse("bookmark-detail", args=[str(bookmark.id)])
+        response = api_client.get(url)
+        assert response.status_code == status.HTTP_404_NOT_FOUND
+
+
+class TestBookmarkDelete:
+    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
+        assert Bookmark.objects.count() == 0
+
+    def test_cannot_delete_other_users_bookmark(
+        self, api_client: APIClient, other_user: User, bookmark: Bookmark
+    ):
+        api_client.force_authenticate(user=other_user)
+        url = reverse("bookmark-detail", args=[str(bookmark.id)])
+        response = api_client.delete(url)
+        assert response.status_code == status.HTTP_404_NOT_FOUND
+
+
+class TestBookmarkFilterByBook:
+    def test_filter_by_book(
+        self, auth_client: APIClient, user: User, book: Book
+    ):
+        other_book = Book.objects.create(title="Other", author="Other")
+        Bookmark.objects.create(user=user, book=book, page=1)
+        Bookmark.objects.create(user=user, book=other_book, page=2)
+
+        url = reverse("bookmark-list")
+        response = auth_client.get(url, {"book": str(book.id)})
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["count"] == 1
+        assert response.data["results"][0]["page"] == 1
+
+
+# ---------------------------------------------------------------------------
+# Note tests
+# ---------------------------------------------------------------------------
+
+class TestNoteList:
+    url = reverse("note-list")
+
+    def test_unauthenticated_user_cannot_list(self, api_client: APIClient):
+        response = api_client.get(self.url)
+        assert response.status_code == status.HTTP_401_UNAUTHORIZED
+
+    def test_list_returns_user_notes_only(
+        self, auth_client: APIClient, user: User, other_user: User, book: Book
+    ):
+        Note.objects.create(user=user, book=book, page=1, content="My note")
+        Note.objects.create(user=other_user, book=book, page=2, content="Other's note")
+
+        response = auth_client.get(self.url)
+        assert response.status_code == status.HTTP_200_OK
+        results = response.data["results"]
+        assert len(results) == 1
+        assert results[0]["content"] == "My note"
+
+    def test_list_includes_book_title(
+        self, auth_client: APIClient, note: Note
+    ):
+        response = auth_client.get(self.url)
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["results"][0]["book_title"] == "Test Book"
+
+
+class TestNoteCreate:
+    url = reverse("note-list")
+
+    def test_create_note(self, auth_client: APIClient, book: Book):
+        data = {
+            "book": str(book.id),
+            "page": 20,
+            "location_text": "interesting part",
+            "content": "This is a thoughtful note.",
+        }
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_201_CREATED
+        assert response.data["content"] == "This is a thoughtful note."
+
+    def test_create_note_without_location_text(
+        self, auth_client: APIClient, book: Book
+    ):
+        data = {"book": str(book.id), "page": 20, "content": "A note."}
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_201_CREATED
+
+    def test_empty_content_rejected(
+        self, auth_client: APIClient, book: Book
+    ):
+        data = {"book": str(book.id), "page": 20, "content": "   "}
+        response = auth_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_400_BAD_REQUEST
+
+    def test_unauthenticated_user_cannot_create(
+        self, api_client: APIClient, book: Book
+    ):
+        data = {"book": str(book.id), "page": 20, "content": "Note"}
+        response = api_client.post(self.url, data, format="json")
+        assert response.status_code == status.HTTP_401_UNAUTHORIZED
+
+
+class TestNoteUpdate:
+    def test_update_note_content(
+        self, auth_client: APIClient, note: Note
+    ):
+        url = reverse("note-detail", args=[str(note.id)])
+        data = {"content": "Updated note content."}
+        response = auth_client.patch(url, data, format="json")
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["content"] == "Updated note content."
+
+    def test_cannot_update_other_users_note(
+        self, api_client: APIClient, other_user: User, note: Note
+    ):
+        api_client.force_authenticate(user=other_user)
+        url = reverse("note-detail", args=[str(note.id)])
+        data = {"content": "Hacked!"}
+        response = api_client.patch(url, data, format="json")
+        assert response.status_code == status.HTTP_404_NOT_FOUND
+
+
+class TestNoteDelete:
+    def test_delete_note(self, auth_client: APIClient, note: Note):
+        url = reverse("note-detail", args=[str(note.id)])
+        response = auth_client.delete(url)
+        assert response.status_code == status.HTTP_204_NO_CONTENT
+        assert Note.objects.count() == 0
+
+    def test_batch_delete_notes(
+        self, auth_client: APIClient, user: User, book: Book
+    ):
+        n1 = Note.objects.create(user=user, book=book, page=1, content="A")
+        n2 = Note.objects.create(user=user, book=book, page=2, content="B")
+        url = reverse("note-batch-delete")
+        response = auth_client.delete(url, {"ids": [str(n1.id), str(n2.id)]}, format="json")
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["deleted"] == 2
+
+
+class TestNoteFilterByBook:
+    def test_filter_by_book(
+        self, auth_client: APIClient, user: User, book: Book
+    ):
+        other_book = Book.objects.create(title="Other", author="Other")
+        Note.objects.create(user=user, book=book, page=1, content="In book")
+        Note.objects.create(user=user, book=other_book, page=2, content="In other")
+
+        url = reverse("note-list")
+        response = auth_client.get(url, {"book": str(book.id)})
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["count"] == 1
+        assert response.data["results"][0]["content"] == "In book"

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 +1,93 @@
+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 bookmarks. Users can only manage their own bookmarks."""
+
+    permission_classes = [IsAuthenticated, IsOwner]
+    filter_backends = [DjangoFilterBackend, SearchFilter, OrderingFilter]
+    filterset_fields = ["book"]
+    search_fields = ["location_text"]
+    ordering_fields = ["created_at", "page"]
+    ordering = ["-created_at"]
+
+    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(
+            "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):
+        """Delete multiple bookmarks by id list."""
+        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):
+    """CRUD for user notes. Users can only manage their own notes."""
+
+    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):
+        """Delete multiple notes by id list."""
+        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/models.py

@@ -0,0 +1,258 @@
+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 FontStyle(models.TextChoices):
+    SANS_SERIF = "sans-serif", "Sans Serif"
+    SERIF = "serif", "Serif"
+    MONOSPACE = "monospace", "Monospace"
+
+
+class BackgroundColor(models.TextChoices):
+    WHITE = "#ffffff", "White"
+    SEPIA = "#f4e4c1", "Sepia"
+    DARK = "#1a1a2e", "Dark"
+    GREEN = "#c7edcc", "Green"
+
+
+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)
+    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
+
+
+class ReadingSettings(models.Model):
+    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="reading_settings")
+    font_size = models.IntegerField(default=18)
+    font_style = models.CharField(max_length=20, choices=FontStyle.choices, default=FontStyle.SANS_SERIF.value)
+    background_color = models.CharField(max_length=7, choices=BackgroundColor.choices, default=BackgroundColor.WHITE.value)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "books_reading_settings"
+        verbose_name_plural = "reading settings"
+
+    def __str__(self):
+        return f"Settings for {self.user}"
+
+
+class Chapter(models.Model):
+    """A chapter within a book, containing the text/markdown content.
+
+    This is distinct from BookChapter (which tracks EPUB TOC entries).
+    Chapter represents user-authored chapter content for a Book.
+    """
+
+    book = models.ForeignKey(
+        Book,
+        on_delete=models.CASCADE,
+        related_name="chapters",
+        db_index=True,
+    )
+    title = models.CharField(max_length=512)
+    number = models.PositiveIntegerField()
+    content = models.TextField(blank=True, default="")
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "books_chapter"
+        verbose_name = "Chapter"
+        verbose_name_plural = "Chapters"
+        ordering = ["book", "number"]
+        constraints = [
+            models.UniqueConstraint(
+                fields=["book", "number"],
+                name="uq_book_chapter_number",
+            )
+        ]
+
+    def __str__(self):
+        return f"{self.book.title} — Ch. {self.number}: {self.title}"
+
+
+class BookReadingProgress(models.Model):
+    """Tracks a user's reading progress within a book's chapters.
+
+    This is distinct from ReadingProgress (which tracks ebook progress).
+    BookReadingProgress tracks chapter-based reading for Books.
+    """
+
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="book_reading_progress",
+        db_index=True,
+    )
+    book = models.ForeignKey(
+        Book,
+        on_delete=models.CASCADE,
+        related_name="book_reading_progress",
+        db_index=True,
+    )
+    current_chapter = models.PositiveIntegerField(default=1)
+    current_position = models.PositiveIntegerField(default=0)
+    percentage = models.FloatField(default=0.0)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "books_book_reading_progress"
+        verbose_name = "Book Reading Progress"
+        verbose_name_plural = "Book Reading Progress"
+        ordering = ["-updated_at"]
+        constraints = [
+            models.UniqueConstraint(
+                fields=["user", "book"],
+                name="uq_book_reading_progress_user_book",
+            )
+        ]
+
+    def __str__(self):
+        return f"{self.user} — {self.book.title} ({self.percentage:.0f}%)"

backend/apps/books/serializers.py

@@ -0,0 +1,228 @@
+from rest_framework import serializers
+
+from apps.books.models import Book, BookChapter, BookReadingProgress, Chapter, EBook, FontStyle, BackgroundColor, ReadingProgress, ReadingSettings, ReadingStatus, DownloadRecord
+
+
+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()
+
+    class Meta:
+        model = EBook
+        fields = ["id", "title", "author", "filename", "format", "page_count", "file_size", "cover_image", "created_at", "progress"]
+
+    def get_progress(self, obj):
+        try:
+            return obj.reading_progress.current_position
+        except ReadingProgress.DoesNotExist:
+            return None
+
+
+class EBookDetailSerializer(serializers.ModelSerializer):
+    filename = serializers.CharField(read_only=True)
+    format = serializers.CharField(read_only=True)
+    file_url = serializers.SerializerMethodField()
+    progress = serializers.SerializerMethodField()
+
+    class Meta:
+        model = EBook
+        fields = ["id", "title", "author", "filename", "format", "page_count", "file_size", "file_url", "cover_image", "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}
+        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):
+        validated_data["user"] = self.context["request"].user
+        # Auto-detect format from file extension
+        import os
+        name = str(getattr(validated_data.get("file"), "name", ""))
+        ext = os.path.splitext(name)[1].lower().lstrip(".")
+        if ext:
+            validated_data["format"] = ext
+        return super().create(validated_data)
+
+
+class ReadingProgressSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ReadingProgress
+        fields = ["current_position", "last_page", "device_id", "device_name", "version", "updated_at"]
+        read_only_fields = ["version", "updated_at"]
+        extra_kwargs = {"current_position": {"required": True, "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 ReadingSettingsSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ReadingSettings
+        fields = ["font_size", "font_style", "background_color"]
+
+    def validate_font_size(self, value):
+        if value < 12 or value > 36:
+            raise serializers.ValidationError("Font size must be between 12 and 36.")
+        return value
+
+    def validate_font_style(self, value):
+        valid = [s.value for s in FontStyle]
+        if value not in valid:
+            raise serializers.ValidationError(f"Font style must be one of: {', '.join(valid)}")
+        return value
+
+    def validate_background_color(self, value):
+        valid = [c.value for c in BackgroundColor]
+        if value not in valid:
+            raise serializers.ValidationError(f"Background color must be one of: {', '.join(valid)}")
+        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}
+        except ReadingProgress.DoesNotExist:
+            return None
+
+
+class StorageSummarySerializer(serializers.Serializer):
+    total_downloads = serializers.IntegerField()
+    total_size_bytes = serializers.IntegerField()
+    ebooks = serializers.ListField(child=serializers.DictField())
+
+
+class ChapterSummarySerializer(serializers.ModelSerializer):
+    """Compact serializer for TOC listing — no content body."""
+
+    class Meta:
+        model = Chapter
+        fields = ["id", "book", "title", "number"]
+
+
+class ChapterDetailSerializer(serializers.ModelSerializer):
+    """Full serializer with chapter content for reading view."""
+
+    class Meta:
+        model = Chapter
+        fields = ["id", "book", "title", "number", "content", "created_at", "updated_at"]
+        read_only_fields = ["id", "created_at", "updated_at"]
+
+
+class BookReadingProgressSerializer(serializers.ModelSerializer):
+    """Serialize chapter-based reading progress for a book."""
+
+    class Meta:
+        model = BookReadingProgress
+        fields = [
+            "id", "book", "current_chapter", "current_position",
+            "percentage", "updated_at",
+        ]
+        read_only_fields = ["id", "updated_at"]
+
+    def validate_percentage(self, value):
+        if value < 0.0 or value > 100.0:
+            raise serializers.ValidationError("Percentage must be between 0 and 100.")
+        return value
+
+    def validate_current_chapter(self, value):
+        if value < 1:
+            raise serializers.ValidationError("Chapter number must be positive.")
+        return value

backend/apps/books/urls.py

@@ -1,12 +1,10 @@
-from __future__ import annotations
-
 from django.urls import include, path
 from rest_framework.routers import DefaultRouter
 
-from books.views import BookViewSet
+from apps.books.views import BookViewSet
 
 router = DefaultRouter()
-router.register(r"books", BookViewSet, basename="book")
+router.register(r"", BookViewSet, basename="book")
 
 urlpatterns = [
     path("", include(router.urls)),

backend/apps/books/views.py

@@ -0,0 +1,341 @@
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+from django.db.models import QuerySet, Q
+from django_filters.rest_framework import DjangoFilterBackend
+from rest_framework import parsers, permissions, status, viewsets
+from rest_framework.decorators import action
+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, BookReadingProgress, DownloadRecord, EBook, Chapter, ReadingProgress, ReadingSettings
+from apps.books.serializers import (
+    BookChapterSerializer, BookDetailSerializer, BookListSerializer, BookSerializer,
+    BookReadingProgressSerializer, ChapterDetailSerializer, ChapterSummarySerializer,
+    DownloadRecordSerializer, EBookContentSerializer, EBookDetailSerializer,
+    EBookListSerializer, EBookTocSerializer, EBookUploadSerializer,
+    ReadingProgressSerializer, ReadingSettingsSerializer, StorageSummarySerializer,
+)
+
+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)
+
+
+    @action(detail=True, methods=["get"])
+    def chapters(self, request: Request, pk: int | None = None) -> Response:
+        """List all chapters for this book (TOC)."""
+        book = self.get_object()
+        chapter_qs = Chapter.objects.filter(book=book).order_by("number")
+        serializer = ChapterSummarySerializer(chapter_qs, many=True)
+        return Response(serializer.data)
+
+    @action(detail=True, methods=["get"], url_path=r"chapters/(?P<chapter_number>[0-9]+)")
+    def chapter_detail(self, request: Request, pk: int | None = None, chapter_number: str | None = None) -> Response:
+        """Get a specific chapter with full content."""
+        book = self.get_object()
+        try:
+            chapter = Chapter.objects.get(book=book, number=int(chapter_number or "0"))
+        except Chapter.DoesNotExist:
+            return Response(
+                {"detail": "Chapter not found."}, status=status.HTTP_404_NOT_FOUND
+            )
+        serializer = ChapterDetailSerializer(chapter)
+        return Response(serializer.data)
+
+    @action(detail=True, methods=["get", "put"])
+    def progress(self, request: Request, pk: int | None = None) -> Response:
+        """Get or update chapter-based reading progress for this book."""
+        book = self.get_object()
+        progress_obj, _created = BookReadingProgress.objects.get_or_create(
+            user=request.user, book=book
+        )
+
+        if request.method == "GET":
+            serializer = BookReadingProgressSerializer(progress_obj)
+            return Response(serializer.data)
+
+        serializer = BookReadingProgressSerializer(
+            progress_obj, data=request.data, partial=True
+        )
+        serializer.is_valid(raise_exception=True)
+        serializer.save()
+        return Response(serializer.data, status=status.HTTP_200_OK)
+
+
+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):
+        return EBook.objects.filter(user=self.request.user).select_related("reading_progress", "user")
+
+    @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"])
+    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 import process_ebook
+
+            file_path = ebook.file.path
+            result = process_ebook(file_path, original_filename=ebook.filename())
+
+            # Update ebook with extracted data
+            ebook.format = result.get("format", ebook.format)
+            ebook.page_count = result.get("page_count", 0)
+            ebook.metadata_json = result.get("metadata", {})
+            ebook.save(update_fields=["format", "page_count", "metadata_json", "updated_at"])
+
+            # Store chapters in DB
+            raw_toc: list[dict[str, Any]] = result.get("toc", [])
+            BookChapter.objects.filter(ebook=ebook).delete()
+            _store_chapters(ebook, raw_toc)
+
+            return Response({
+                "format": ebook.format,
+                "page_count": ebook.page_count,
+                "metadata": ebook.metadata_json,
+                "toc_count": len(raw_toc),
+                "status": "processed",
+            })
+        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 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 _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 _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 ""
+
+
+class ReadingSettingsViewSet(viewsets.GenericViewSet):
+    permission_classes = [IsAuthenticated]
+    serializer_class = ReadingSettingsSerializer
+
+    def get_queryset(self):
+        return ReadingSettings.objects.filter(user=self.request.user)
+
+    def list(self, request: Request) -> Response:
+        settings_obj, _created = ReadingSettings.objects.get_or_create(user=request.user)
+        serializer = self.get_serializer(settings_obj)
+        return Response(serializer.data)
+
+    def partial_update(self, request: Request) -> Response:
+        settings_obj, _created = ReadingSettings.objects.get_or_create(user=request.user)
+        serializer = self.get_serializer(settings_obj, data=request.data, partial=True)
+        serializer.is_valid(raise_exception=True)
+        serializer.save()
+        return Response(serializer.data)

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/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/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/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/urls.py

@@ -0,0 +1,8 @@
+from django.urls import include, path
+from rest_framework.routers import DefaultRouter
+from rest_framework_simplejwt.views import TokenObtainPairView, TokenRefreshView
+
+urlpatterns = [
+    path("token/", TokenObtainPairView.as_view(), name="token_obtain_pair"),
+    path("token/refresh/", TokenRefreshView.as_view(), name="token_refresh"),
+]

backend/books/admin.py

@@ -1,16 +0,0 @@
-from __future__ import annotations
-
-from django.contrib import admin
-
-from books.models import Book
-
-
-@admin.register(Book)
-class BookAdmin(admin.ModelAdmin):
-    """Admin configuration for the Book model."""
-
-    list_display = ["title", "author", "genre", "reading_status", "reading_progress", "owner", "updated_at"]
-    list_filter = ["reading_status", "genre"]
-    search_fields = ["title", "author"]
-    readonly_fields = ["reading_progress", "created_at", "updated_at"]
-    raw_id_fields = ["owner"]

backend/books/apps.py

@@ -1,5 +0,0 @@
-from django.apps import AppConfig
-
-
-class BooksConfig(AppConfig):
-    name = 'books'

backend/books/migrations/0001_initial.py

@@ -1,41 +0,0 @@
-# Generated by Django 6.0.5 on 2026-05-26 00:49
-
-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(max_length=500, verbose_name='Title')),
-                ('author', models.CharField(max_length=500, verbose_name='Author')),
-                ('genre', models.CharField(blank=True, default='', max_length=200, verbose_name='Genre')),
-                ('description', models.TextField(blank=True, default='', verbose_name='Description')),
-                ('cover_image_url', models.URLField(blank=True, default='', verbose_name='Cover Image URL')),
-                ('isbn', models.CharField(blank=True, default='', max_length=20, verbose_name='ISBN')),
-                ('total_pages', models.PositiveIntegerField(default=0, verbose_name='Total Pages')),
-                ('current_page', models.PositiveIntegerField(default=0, verbose_name='Current Page')),
-                ('reading_status', models.CharField(choices=[('not_started', 'Not Started'), ('reading', 'Reading'), ('finished', 'Finished'), ('dnf', 'Did Not Finish')], default='not_started', max_length=20, verbose_name='Reading Status')),
-                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Created At')),
-                ('updated_at', models.DateTimeField(auto_now=True, verbose_name='Updated At')),
-                ('owner', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='books', to=settings.AUTH_USER_MODEL, verbose_name='Owner')),
-            ],
-            options={
-                'verbose_name': 'Book',
-                'verbose_name_plural': 'Books',
-                'ordering': ['-updated_at'],
-                'indexes': [models.Index(fields=['owner', 'reading_status'], name='books_book_owner_i_424622_idx'), models.Index(fields=['owner', 'title'], name='books_book_owner_i_350794_idx'), models.Index(fields=['owner', 'author'], name='books_book_owner_i_f90626_idx')],
-            },
-        ),
-    ]

backend/books/models.py

@@ -1,66 +0,0 @@
-from __future__ import annotations
-
-from django.db import models
-from django.utils.translation import gettext_lazy as _
-
-
-class ReadingStatus(models.TextChoices):
-    """Enumeration of possible reading statuses for a book."""
-
-    NOT_STARTED = "not_started", _("Not Started")
-    READING = "reading", _("Reading")
-    FINISHED = "finished", _("Finished")
-    DNF = "dnf", _("Did Not Finish")
-
-
-class Book(models.Model):
-    """Represents a book in the user's library."""
-
-    title = models.CharField(max_length=500, verbose_name=_("Title"))
-    author = models.CharField(max_length=500, verbose_name=_("Author"))
-    genre = models.CharField(max_length=200, blank=True, default="", verbose_name=_("Genre"))
-    description = models.TextField(blank=True, default="", verbose_name=_("Description"))
-    cover_image_url = models.URLField(blank=True, default="", verbose_name=_("Cover Image URL"))
-    isbn = models.CharField(max_length=20, blank=True, default="", verbose_name=_("ISBN"))
-    total_pages = models.PositiveIntegerField(default=0, verbose_name=_("Total Pages"))
-    current_page = models.PositiveIntegerField(default=0, verbose_name=_("Current Page"))
-    reading_status = models.CharField(
-        max_length=20,
-        choices=ReadingStatus.choices,
-        default=ReadingStatus.NOT_STARTED,
-        verbose_name=_("Reading Status"),
-    )
-    owner = models.ForeignKey(
-        "auth.User",
-        on_delete=models.CASCADE,
-        related_name="books",
-        verbose_name=_("Owner"),
-    )
-    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_("Created At"))
-    updated_at = models.DateTimeField(auto_now=True, verbose_name=_("Updated At"))
-
-    class Meta:
-        ordering = ["-updated_at"]
-        verbose_name = _("Book")
-        verbose_name_plural = _("Books")
-        indexes = [
-            models.Index(fields=["owner", "reading_status"]),
-            models.Index(fields=["owner", "title"]),
-            models.Index(fields=["owner", "author"]),
-        ]
-
-    def __str__(self) -> str:
-        return f"{self.title} by {self.author}"
-
-    @property
-    def reading_progress(self) -> float:
-        """Calculate reading progress as a percentage (0.0 - 100.0)."""
-        if self.total_pages == 0:
-            return 0.0
-        return round((self.current_page / self.total_pages) * 100, 1)
-
-    def mark_as_finished(self) -> None:
-        """Mark the book as finished, setting progress to 100%."""
-        self.reading_status = ReadingStatus.FINISHED
-        self.current_page = self.total_pages
-        self.save(update_fields=["reading_status", "current_page", "updated_at"])

backend/books/serializers.py

@@ -1,95 +0,0 @@
-from __future__ import annotations
-
-from rest_framework import serializers
-
-from books.models import Book, ReadingStatus
-
-
-class BookListSerializer(serializers.ModelSerializer):
-    """Lightweight serializer for list views — avoids heavy field serialization."""
-
-    reading_progress = serializers.FloatField(read_only=True)
-
-    class Meta:
-        model = Book
-        fields = [
-            "id",
-            "title",
-            "author",
-            "genre",
-            "reading_status",
-            "reading_progress",
-            "cover_image_url",
-            "created_at",
-            "updated_at",
-        ]
-
-
-class BookDetailSerializer(serializers.ModelSerializer):
-    """Full serializer for book detail views including all metadata."""
-
-    reading_progress = serializers.FloatField(read_only=True)
-    owner = serializers.ReadOnlyField(source="owner.username")
-
-    class Meta:
-        model = Book
-        fields = [
-            "id",
-            "title",
-            "author",
-            "genre",
-            "description",
-            "cover_image_url",
-            "isbn",
-            "total_pages",
-            "current_page",
-            "reading_status",
-            "reading_progress",
-            "owner",
-            "created_at",
-            "updated_at",
-        ]
-        read_only_fields = ["owner", "created_at", "updated_at", "reading_progress"]
-
-    def validate_title(self, value: str) -> str:
-        """Ensure title is not just whitespace."""
-        stripped = value.strip()
-        if not stripped:
-            msg = "Title cannot be empty."
-            raise serializers.ValidationError(msg)
-        return stripped
-
-    def validate_author(self, value: str) -> str:
-        """Ensure author is not just whitespace."""
-        stripped = value.strip()
-        if not stripped:
-            msg = "Author cannot be empty."
-            raise serializers.ValidationError(msg)
-        return stripped
-
-    def validate(self, attrs: dict) -> dict:
-        """Business rules — handles both full creates and partial updates."""
-        # Resolve effective values: use provided attrs, fall back to instance
-        current_total = getattr(self.instance, "total_pages", None)
-        current_current = getattr(self.instance, "current_page", None)
-        total_pages = attrs.get("total_pages", current_total) or 0
-        current_page = attrs.get("current_page", current_current) or 0
-        reading_status = attrs.get("reading_status", None)
-
-        if current_page > total_pages > 0:
-            msg = "Current page cannot exceed total pages."
-            raise serializers.ValidationError({"current_page": msg})
-
-        if reading_status == ReadingStatus.FINISHED:
-            if total_pages > 0:
-                attrs["current_page"] = total_pages
-            elif self.instance and self.instance.total_pages > 0:
-                attrs["current_page"] = self.instance.total_pages
-
-        return attrs
-
-
-class BookWriteSerializer(BookDetailSerializer):
-    """Alias for detail serializer — used for write operations with full validation."""
-
-    pass

backend/books/tests.py

@@ -1,325 +0,0 @@
-"""Tests for the books app — API endpoints, models, serializers, and permissions."""
-
-from __future__ import annotations
-
-from django.contrib.auth.models import User
-from django.test import TestCase, override_settings
-from rest_framework import status
-from rest_framework.test import APIClient
-
-from books.models import Book, ReadingStatus
-
-
-class BookModelTests(TestCase):
-    """Tests for the Book model."""
-
-    def setUp(self) -> None:
-        self.user = User.objects.create_user(username="testuser", password="testpass123")
-        self.book = Book.objects.create(
-            title="Test Book",
-            author="Test Author",
-            total_pages=200,
-            current_page=50,
-            reading_status=ReadingStatus.READING,
-            owner=self.user,
-        )
-
-    def test_reading_progress_calculates_correctly(self) -> None:
-        """Reading progress should be (current_page / total_pages) * 100."""
-        assert self.book.reading_progress == 25.0
-
-    def test_reading_progress_returns_zero_when_no_pages(self) -> None:
-        """When total_pages is 0, reading_progress should be 0.0."""
-        book = Book.objects.create(
-            title="No Pages",
-            author="Author",
-            total_pages=0,
-            current_page=50,
-            owner=self.user,
-        )
-        assert book.reading_progress == 0.0
-
-    def test_mark_as_finished_sets_progress_to_100(self) -> None:
-        """mark_as_finished should set status to FINISHED and progress to 100%."""
-        self.book.mark_as_finished()
-        self.book.refresh_from_db()
-        assert self.book.reading_status == ReadingStatus.FINISHED
-        assert self.book.current_page == self.book.total_pages
-
-    def test_mark_as_finished_with_zero_pages(self) -> None:
-        """mark_as_finished with total_pages=0 should set 0/0."""
-        book = Book.objects.create(
-            title="Empty",
-            author="Author",
-            total_pages=0,
-            current_page=0,
-            owner=self.user,
-        )
-        book.mark_as_finished()
-        book.refresh_from_db()
-        assert book.reading_status == ReadingStatus.FINISHED
-        assert book.current_page == 0
-
-    def test_str_method(self) -> None:
-        """__str__ should return 'Title by Author'."""
-        assert str(self.book) == "Test Book by Test Author"
-
-
-class BookAPITests(TestCase):
-    """Tests for the Book API endpoints."""
-
-    def setUp(self) -> None:
-        self.client = APIClient()
-        self.user = User.objects.create_user(username="testuser", password="testpass123")
-        self.other_user = User.objects.create_user(username="other", password="testpass123")
-        self.client.force_authenticate(user=self.user)
-
-        self.book = Book.objects.create(
-            title="My Book",
-            author="My Author",
-            genre="Fiction",
-            description="A great book",
-            total_pages=200,
-            current_page=50,
-            reading_status=ReadingStatus.READING,
-            owner=self.user,
-        )
-        # Other user's book (should not be visible)
-        Book.objects.create(
-            title="Other Book",
-            author="Other Author",
-            total_pages=100,
-            owner=self.other_user,
-        )
-
-    # --- List ---
-
-    def test_list_books_returns_owned_books_only(self) -> None:
-        """GET /api/books/ should only return books owned by the current user."""
-        resp = self.client.get("/api/books/")
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["count"] == 1
-        assert resp.data["results"][0]["title"] == "My Book"
-
-    def test_list_books_requires_authentication(self) -> None:
-        """GET /api/books/ without auth should return 403."""
-        self.client.force_authenticate(user=None)
-        resp = self.client.get("/api/books/")
-        assert resp.status_code == status.HTTP_403_FORBIDDEN
-
-    # --- Create ---
-
-    def test_create_book_sets_owner(self) -> None:
-        """POST /api/books/ should create a book owned by the current user."""
-        resp = self.client.post("/api/books/", {
-            "title": "New Book",
-            "author": "New Author",
-        }, format="json")
-        assert resp.status_code == status.HTTP_201_CREATED
-        assert resp.data["owner"] == "testuser"
-        assert Book.objects.filter(title="New Book", owner=self.user).exists()
-
-    def test_create_book_validates_required_fields(self) -> None:
-        """POST /api/books/ with missing title should fail."""
-        resp = self.client.post("/api/books/", {
-            "author": "Author Only",
-        }, format="json")
-        assert resp.status_code == status.HTTP_400_BAD_REQUEST
-
-    # --- Retrieve ---
-
-    def test_retrieve_book(self) -> None:
-        """GET /api/books/{id}/ should return full book details."""
-        resp = self.client.get(f"/api/books/{self.book.id}/")
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["title"] == "My Book"
-        assert resp.data["reading_progress"] == 25.0
-        assert resp.data["owner"] == "testuser"
-
-    def test_retrieve_other_users_book_returns_404(self) -> None:
-        """GET /api/books/{other_id}/ should return 404 for another user's book."""
-        other_book = Book.objects.get(title="Other Book")
-        resp = self.client.get(f"/api/books/{other_book.id}/")
-        assert resp.status_code == status.HTTP_404_NOT_FOUND
-
-    # --- Update ---
-
-    def test_update_book(self) -> None:
-        """PATCH /api/books/{id}/ should update book fields."""
-        resp = self.client.patch(f"/api/books/{self.book.id}/", {
-            "title": "Updated Title",
-            "current_page": 100,
-        }, format="json")
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["title"] == "Updated Title"
-        assert resp.data["reading_progress"] == 50.0
-
-    def test_update_current_page_exceeds_total(self) -> None:
-        """PATCH with current_page > total_pages should fail."""
-        resp = self.client.patch(f"/api/books/{self.book.id}/", {
-            "current_page": 999,
-        }, format="json")
-        assert resp.status_code == status.HTTP_400_BAD_REQUEST
-
-    # --- Delete ---
-
-    def test_delete_book(self) -> None:
-        """DELETE /api/books/{id}/ should delete the book."""
-        resp = self.client.delete(f"/api/books/{self.book.id}/")
-        assert resp.status_code == status.HTTP_204_NO_CONTENT
-        assert not Book.objects.filter(id=self.book.id).exists()
-
-    # --- Mark Finished ---
-
-    def test_mark_finished_sets_100_percent(self) -> None:
-        """POST /api/books/{id}/mark_finished/ should set progress to 100%."""
-        resp = self.client.post(f"/api/books/{self.book.id}/mark_finished/")
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["reading_status"] == ReadingStatus.FINISHED
-        assert resp.data["reading_progress"] == 100.0
-
-    def test_mark_finished_idempotent(self) -> None:
-        """Calling mark_finished twice should be safe."""
-        self.client.post(f"/api/books/{self.book.id}/mark_finished/")
-        resp = self.client.post(f"/api/books/{self.book.id}/mark_finished/")
-        assert resp.status_code == status.HTTP_200_OK
-
-    def test_mark_finished_other_users_book(self) -> None:
-        """POST mark_finished on another user's book should return 404."""
-        other_book = Book.objects.get(title="Other Book")
-        resp = self.client.post(f"/api/books/{other_book.id}/mark_finished/")
-        assert resp.status_code == status.HTTP_404_NOT_FOUND
-
-    # --- Stats ---
-
-    def test_stats_returns_counts(self) -> None:
-        """GET /api/books/stats/ should return aggregate counts."""
-        resp = self.client.get("/api/books/stats/")
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["total_books"] == 1
-        assert resp.data["finished"] == 0
-        assert resp.data["reading"] == 1
-        assert resp.data["not_started"] == 0
-
-    # --- Filtering & Sorting ---
-
-    def test_filter_by_reading_status(self) -> None:
-        """GET /api/books/?reading_status=reading should filter correctly."""
-        resp = self.client.get("/api/books/", {"reading_status": "reading"})
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["count"] == 1
-
-        resp = self.client.get("/api/books/", {"reading_status": "finished"})
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["count"] == 0
-
-    def test_search_by_title(self) -> None:
-        """GET /api/books/?search=My should filter by title."""
-        resp = self.client.get("/api/books/", {"search": "My"})
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["count"] == 1
-
-        resp = self.client.get("/api/books/", {"search": "Nonexistent"})
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["count"] == 0
-
-    def test_search_by_author(self) -> None:
-        """GET /api/books/?search=My should filter by author."""
-        resp = self.client.get("/api/books/", {"search": "My Author"})
-        assert resp.status_code == status.HTTP_200_OK
-        assert resp.data["count"] == 1
-
-    def test_sort_by_title(self) -> None:
-        """GET /api/books/?sort_by=title should sort alphabetically."""
-        Book.objects.create(title="Aardvark", author="Author", owner=self.user)
-        Book.objects.create(title="Zebra", author="Author", owner=self.user)
-        resp = self.client.get("/api/books/", {"sort_by": "title"})
-        assert resp.status_code == status.HTTP_200_OK
-        titles = [b["title"] for b in resp.data["results"]]
-        assert titles == sorted(titles)
-
-    def test_sort_by_author_desc(self) -> None:
-        """GET /api/books/?sort_by=-author should sort by author desc."""
-        resp = self.client.get("/api/books/", {"sort_by": "-author"})
-        assert resp.status_code == status.HTTP_200_OK
-
-    # --- Pagination ---
-
-    def test_pagination_default_page_size(self) -> None:
-        """Books should be paginated with default page size."""
-        for i in range(25):
-            Book.objects.create(
-                title=f"Book {i}",
-                author="Author",
-                owner=self.user,
-            )
-        resp = self.client.get("/api/books/")
-        assert resp.status_code == status.HTTP_200_OK
-        assert len(resp.data["results"]) == 20  # PAGE_SIZE = 20
-        assert resp.data["count"] == 26  # 1 original + 25 new
-
-    def test_pagination_second_page(self) -> None:
-        """GET /api/books/?page=2 should return remaining items."""
-        for i in range(25):
-            Book.objects.create(
-                title=f"Book {i}",
-                author="Author",
-                owner=self.user,
-            )
-        resp = self.client.get("/api/books/", {"page": 2})
-        assert resp.status_code == status.HTTP_200_OK
-        assert len(resp.data["results"]) == 6
-
-
-class BookSerializerTests(TestCase):
-    """Tests for serializers — validation rules."""
-
-    def setUp(self) -> None:
-        self.user = User.objects.create_user(username="testuser", password="testpass123")
-
-    def test_current_page_cannot_exceed_total(self) -> None:
-        """Serializer should reject current_page > total_pages."""
-        from books.serializers import BookDetailSerializer
-        data = {
-            "title": "Test",
-            "author": "Author",
-            "total_pages": 100,
-            "current_page": 150,
-        }
-        serializer = BookDetailSerializer(data=data)
-        assert not serializer.is_valid()
-        assert "current_page" in serializer.errors
-
-    def test_title_cannot_be_blank(self) -> None:
-        """Serializer should reject blank title."""
-        from books.serializers import BookDetailSerializer
-        data = {
-            "title": "   ",
-            "author": "Author",
-        }
-        serializer = BookDetailSerializer(data=data)
-        assert not serializer.is_valid()
-        assert "title" in serializer.errors
-
-    def test_author_cannot_be_blank(self) -> None:
-        """Serializer should reject blank author."""
-        from books.serializers import BookDetailSerializer
-        data = {
-            "title": "Test",
-            "author": "",
-        }
-        serializer = BookDetailSerializer(data=data)
-        assert not serializer.is_valid()
-        assert "author" in serializer.errors
-
-    def test_list_serializer_has_minimal_fields(self) -> None:
-        """BookListSerializer should exclude sensitive/fluff fields."""
-        from books.serializers import BookListSerializer
-        serializer = BookListSerializer()
-        fields = set(serializer.fields.keys())
-        assert "id" in fields
-        assert "title" in fields
-        assert "author" in fields
-        assert "reading_progress" in fields
-        assert "description" not in fields
-        assert "isbn" not in fields

backend/books/views.py

@@ -1,91 +0,0 @@
-from __future__ import annotations
-
-from django.db import models
-from django.db.models import QuerySet
-from rest_framework import status, viewsets
-from rest_framework.decorators import action
-from rest_framework.permissions import IsAuthenticated
-from rest_framework.request import Request
-from rest_framework.response import Response
-
-from books.models import Book, ReadingStatus
-from books.serializers import BookDetailSerializer, BookListSerializer
-
-
-class BookViewSet(viewsets.ModelViewSet):
-    """
-    ViewSet for managing books in the user's library.
-
-    Provides:
-    - list / retrieve / create / update / partial_update / destroy
-    - `mark_finished` action to set a book as 100% complete
-    - `stats` action for library overview counts
-    """
-
-    permission_classes = [IsAuthenticated]
-
-    def get_serializer_class(self) -> type:
-        if self.action == "list":
-            return BookListSerializer
-        return BookDetailSerializer
-
-    def get_queryset(self) -> QuerySet[Book]:
-        """Return books owned by the current user with optimised queries."""
-        qs = Book.objects.filter(owner=self.request.user).select_related("owner")
-
-        # Sorting
-        sort_by = self.request.query_params.get("sort_by", "-updated_at")
-        allowed_sorts = {
-            "title": "title",
-            "-title": "-title",
-            "author": "author",
-            "-author": "-author",
-            "created_at": "created_at",
-            "-created_at": "-created_at",
-            "updated_at": "updated_at",
-            "-updated_at": "-updated_at",
-            "reading_progress": "current_page",  # approximate sort by pages read
-            "-reading_progress": "-current_page",
-        }
-        if sort_by in allowed_sorts:
-            qs = qs.order_by(allowed_sorts[sort_by])
-
-        # Filtering
-        status_filter = self.request.query_params.get("reading_status", None)
-        if status_filter in ReadingStatus.values:
-            qs = qs.filter(reading_status=status_filter)
-
-        search = self.request.query_params.get("search", "").strip()
-        if search:
-            qs = qs.filter(
-                models.Q(title__icontains=search) | models.Q(author__icontains=search)
-            )
-
-        return qs
-
-    def perform_create(self, serializer: BookDetailSerializer) -> None:
-        """Set the owner to the current user on creation."""
-        serializer.save(owner=self.request.user)
-
-    @action(detail=True, methods=["post"])
-    def mark_finished(self, request: Request, pk: int | None = None) -> Response:
-        """Mark a book as finished (100% progress)."""
-        book: Book = self.get_object()
-        book.mark_as_finished()
-        serializer = self.get_serializer(book)
-        return Response(serializer.data, status=status.HTTP_200_OK)
-
-    @action(detail=False, methods=["get"])
-    def stats(self, request: Request) -> Response:
-        """Return aggregate stats about the user's library."""
-        qs = self.get_queryset()
-        total = qs.count()
-        finished = qs.filter(reading_status=ReadingStatus.FINISHED).count()
-        reading = qs.filter(reading_status=ReadingStatus.READING).count()
-        not_started = qs.filter(reading_status=ReadingStatus.NOT_STARTED).count()
-        return Response({
-            "total_books": total,
-            "finished": finished,
-            "reading": reading,
-            "not_started": not_started,
-        })

backend/config/asgi.py

@@ -1,16 +0,0 @@
-"""
-ASGI config for config project.
-
-It exposes the ASGI callable as a module-level variable named ``application``.
-
-For more information on this file, see
-https://docs.djangoproject.com/en/6.0/howto/deployment/asgi/
-"""
-
-import os
-
-from django.core.asgi import get_asgi_application
-
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
-
-application = get_asgi_application()

backend/config/django.py

@@ -0,0 +1,154 @@
+"""
+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
+# ---------------------------------------------------------------------------
+STATIC_URL = "static/"
+STATIC_ROOT = BASE_DIR / "staticfiles"
+MEDIA_URL = "media/"
+MEDIA_ROOT = BASE_DIR / "media"
+
+# ---------------------------------------------------------------------------
+# Default primary key
+# ---------------------------------------------------------------------------
+DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

backend/config/settings.py

@@ -1,99 +1,42 @@
-"""
+import os
-Django settings for config project.
-
-Generated by 'django-admin startproject' using Django 6.0.5.
-"""
-
 from pathlib import Path
 
-from config.settings_app import settings
+from pydantic_settings import BaseSettings
 
-BASE_DIR = Path(__file__).resolve().parent.parent
 
-SECRET_KEY = settings.SECRET_KEY
+class Settings(BaseSettings):
-DEBUG = settings.DEBUG
+    """Application settings via pydantic-settings. Reads from env vars and .env."""
-ALLOWED_HOSTS = settings.ALLOWED_HOSTS
 
-INSTALLED_APPS = [
+    # Django
-    "django.contrib.admin",
+    DJANGO_SECRET_KEY: str = "django-insecure-change-me-in-production"
-    "django.contrib.auth",
+    DJANGO_DEBUG: bool = False
-    "django.contrib.contenttypes",
+    DJANGO_ALLOWED_HOSTS: list[str] = ["*"]
-    "django.contrib.sessions",
-    "django.contrib.messages",
-    "django.contrib.staticfiles",
-    # Third-party
-    "rest_framework",
-    "corsheaders",
-    # Local apps
-    "books",
-]
 
-MIDDLEWARE = [
+    # PostgreSQL
-    "corsheaders.middleware.CorsMiddleware",
+    DB_NAME: str = "cloud_reader"
-    "django.middleware.security.SecurityMiddleware",
+    DB_USER: str = "postgres"
-    "django.contrib.sessions.middleware.SessionMiddleware",
+    DB_PASSWORD: str = "postgres"
-    "django.middleware.common.CommonMiddleware",
+    DB_HOST: str = "localhost"
-    "django.middleware.csrf.CsrfViewMiddleware",
+    DB_PORT: int = 5432
-    "django.contrib.auth.middleware.AuthenticationMiddleware",
-    "django.contrib.messages.middleware.MessageMiddleware",
-    "django.middleware.clickjacking.XFrameOptionsMiddleware",
-]
 
-ROOT_URLCONF = "config.urls"
+    # JWT
-
+    JWT_ACCESS_TOKEN_LIFETIME_MINUTES: int = 60
-TEMPLATES = [
+    JWT_REFRESH_TOKEN_LIFETIME_DAYS: int = 7
-    {
-        "BACKEND": "django.template.backends.django.DjangoTemplates",
-        "DIRS": [],
-        "APP_DIRS": True,
-        "OPTIONS": {
-            "context_processors": [
-                "django.template.context_processors.request",
-                "django.contrib.auth.context_processors.auth",
-                "django.contrib.messages.context_processors.messages",
-            ],
-        },
-    },
-]
-
-WSGI_APPLICATION = "config.wsgi.application"
-
-DATABASES = {
-    "default": {
-        "ENGINE": "django.db.backends.sqlite3",
-        "NAME": BASE_DIR / "db.sqlite3",
-    }
-}
-
-AUTH_PASSWORD_VALIDATORS = [
-    {"NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator"},
-    {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
-    {"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator"},
-    {"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator"},
-]
-
-LANGUAGE_CODE = "en-us"
-TIME_ZONE = "UTC"
-USE_I18N = True
-USE_TZ = True
-
-STATIC_URL = "static/"
-
-DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
 
     # CORS
-CORS_ALLOWED_ORIGINS = settings.CORS_ALLOWED_ORIGINS
+    CORS_ALLOWED_ORIGINS: list[str] = [
-CORS_ALLOW_CREDENTIALS = settings.CORS_ALLOW_CREDENTIALS
+        "http://localhost:5173",
+        "http://localhost:3000",
+    ]
 
-# REST Framework
+    @property
-REST_FRAMEWORK = {
+    def DATABASE_URL(self) -> str:
-    "DEFAULT_AUTHENTICATION_CLASSES": [
+        return (
-        "rest_framework.authentication.SessionAuthentication",
+            f"postgresql://{self.DB_USER}:{self.DB_PASSWORD}"
-        "rest_framework.authentication.BasicAuthentication",
+            f"@{self.DB_HOST}:{self.DB_PORT}/{self.DB_NAME}"
-    ],
+        )
-    "DEFAULT_PERMISSION_CLASSES": [
+
-        "rest_framework.permissions.IsAuthenticatedOrReadOnly",
+    model_config = {"env_file": ".env", "env_file_encoding": "utf-8"}
-    ],
+
-    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.PageNumberPagination",
+
-    "PAGE_SIZE": 20,
+settings = Settings()
-}

backend/config/settings_app.py

@@ -1,33 +0,0 @@
-from __future__ import annotations
-
-from pathlib import Path
-
-from pydantic_settings import BaseSettings, SettingsConfigDict
-
-
-class Settings(BaseSettings):
-    """Application settings loaded from environment variables."""
-
-    DEBUG: bool = True
-    SECRET_KEY: str = "django-insecure-change-me-in-production"
-    DATABASE_URL: str = "sqlite:///db.sqlite3"
-    ALLOWED_HOSTS: list[str] = ["*"]
-    CORS_ALLOWED_ORIGINS: list[str] = [
-        "http://localhost:3000",
-        "http://localhost:5173",
-        "http://127.0.0.1:3000",
-        "http://127.0.0.1:5173",
-    ]
-    CORS_ALLOW_CREDENTIALS: bool = True
-
-    BASE_DIR: Path = Path(__file__).resolve().parent.parent
-
-    model_config = SettingsConfigDict(
-        env_prefix="CR_",
-        env_file=".env",
-        env_file_encoding="utf-8",
-        extra="ignore",
-    )
-
-
-settings = Settings()

backend/config/urls.py

@@ -3,6 +3,8 @@ from django.urls import include, path
 
 urlpatterns = [
     path("admin/", admin.site.urls),
-    path("api-auth/", include("rest_framework.urls")),
+    path("api/auth/", include("apps.users.urls")),
-    path("api/", include("books.urls")),
+    path("api/books/", include("apps.books.urls")),
+    path("api/annotations/", include("apps.annotations.urls")),
+    path("api/reader/", include("apps.reader.urls")),
 ]

backend/config/wsgi.py

@@ -1,16 +1,7 @@
-"""
-WSGI config for config project.
-
-It exposes the WSGI callable as a module-level variable named ``application``.
-
-For more information on this file, see
-https://docs.djangoproject.com/en/6.0/howto/deployment/wsgi/
-"""
-
 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():
     """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:
@@ -18,5 +19,5 @@ def main():
     execute_from_command_line(sys.argv)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()

backend/pytest.ini

@@ -1,3 +1,8 @@
-[pytest]
+[tool:pytest]
-DJANGO_SETTINGS_MODULE = config.settings
+DJANGO_SETTINGS_MODULE = config.django
 python_files = tests.py test_*.py *_tests.py
+testpaths = apps
+
+[coverage:run]
+source = apps
+omit = */tests/*,*/migrations/*,*/admin.py,*/apps.py

backend/requirements.txt

@@ -1,6 +1,14 @@
-django>=5.0,<7.0
+Django==5.1.7
-djangorestframework>=3.15.0
+djangorestframework==3.15.2
-django-cors-headers>=4.0.0
+djangorestframework-simplejwt==5.4.0
-pydantic>=2.0.0
+django-filter==25.1
-pydantic-settings>=2.0.0
+django-cors-headers==4.6.0
-pytest-django>=4.5.0
+psycopg2-binary==2.9.10
+pydantic==2.10.5
+pydantic-settings==2.7.1
+python-dotenv==1.0.1
+gunicorn==23.0.0
+pytest==8.3.4
+pytest-django==4.9.0
+pytest-cov==6.0.0
+coverage==7.6.10

docker-compose.yml

@@ -0,0 +1,52 @@
+services:
+  db:
+    image: postgres:15
+    restart: unless-stopped
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_DB: cloudreader
+      POSTGRES_USER: cloudreader
+      POSTGRES_PASSWORD: cloudreader
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U cloudreader -d cloudreader"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  api:
+    build:
+      context: ./api
+    ports:
+      - "8000:8000"
+    environment:
+      DATABASE_URL: "postgres://cloudreader:cloudreader@db:5432/cloudreader"
+      DJANGO_SECRET_KEY: "dev-secret-key-change-in-production"
+      DJANGO_DEBUG: "True"
+    volumes:
+      - ./api:/app
+      - book_uploads:/app/media
+    command: >
+      sh -c "python manage.py migrate && python manage.py runserver 0.0.0.0:8000"
+    depends_on:
+      db:
+        condition: service_healthy
+
+  web:
+    build:
+      context: ./web
+    ports:
+      - "3000:3000"
+    environment:
+      VITE_API_URL: "http://localhost:8000"
+    volumes:
+      - ./web:/app
+      - /app/node_modules
+    depends_on:
+      - api
+
+volumes:
+  postgres_data:
+  book_uploads:

docs/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/backend/api-spec.md

@@ -1,84 +0,0 @@
-# Backend API Specification — Cloud Reader
-
-## Overview
-
-The Cloud Reader backend provides a RESTful API for managing a user's personal book library. Built with Django 5 + Django REST Framework.
-
-## Models
-
-### Book
-
-| Field            | Type               | Constraints                     |
-|------------------|--------------------|---------------------------------|
-| `title`          | `CharField(500)`   | Required                         |
-| `author`         | `CharField(500)`   | Required                         |
-| `genre`          | `CharField(200)`   | Optional, blank allowed          |
-| `description`    | `TextField`        | Optional, blank allowed          |
-| `cover_image_url`| `URLField`         | Optional, blank allowed          |
-| `isbn`           | `CharField(20)`    | Optional, blank allowed          |
-| `total_pages`    | `PositiveIntegerField` | Default 0                   |
-| `current_page`   | `PositiveIntegerField` | Default 0, validated ≤ total |
-| `reading_status` | `CharField(20)`    | Choices: `not_started`, `reading`, `finished`, `dnf` |
-| `owner`          | `ForeignKey(User)` | Set automatically on create      |
-| `created_at`     | `DateTimeField`    | Auto-set on create               |
-| `updated_at`     | `DateTimeField`    | Auto-set on update               |
-
-**Properties:**
-- `reading_progress` — computed `(current_page / total_pages) * 100`, returns `0.0` when `total_pages` is 0.
-
-**Indexes:** Composite indexes on `(owner, reading_status)`, `(owner, title)`, `(owner, author)`.
-
-## API Endpoints
-
-Base URL: `/api/`
-
-Authentication: SessionAuthentication + BasicAuthentication (DRF defaults).
-
-Permissions: All book endpoints require `IsAuthenticated`. Users can only access their own books.
-
-### Books
-
-| Method   | URL                                | Action        | Serializer         |
-|----------|------------------------------------|---------------|--------------------|
-| `GET`    | `/api/books/`                      | List books    | `BookListSerializer` |
-| `POST`   | `/api/books/`                      | Create book   | `BookDetailSerializer` |
-| `GET`    | `/api/books/{id}/`                 | Retrieve book | `BookDetailSerializer` |
-| `PUT`    | `/api/books/{id}/`                 | Full update   | `BookDetailSerializer` |
-| `PATCH`  | `/api/books/{id}/`                 | Partial update| `BookDetailSerializer` |
-| `DELETE` | `/api/books/{id}/`                 | Delete book   | —                    |
-| `POST`   | `/api/books/{id}/mark_finished/`   | Mark finished | `BookDetailSerializer` |
-| `GET`    | `/api/books/stats/`                | Library stats | — (custom)           |
-
-### Query Parameters (List)
-
-| Parameter        | Type     | Description                                      |
-|------------------|----------|--------------------------------------------------|
-| `page`           | int      | Page number for pagination (20 items/page)       |
-| `sort_by`        | string   | `title`, `-title`, `author`, `-author`, `-created_at`, `-updated_at`, `-reading_progress`, `reading_progress` |
-| `reading_status` | string   | Filter by status value                           |
-| `search`         | string   | Search in title and author fields (icontains)    |
-
-### Stats Response
-
-```json
-{
-  "total_books": 10,
-  "finished": 3,
-  "reading": 4,
-  "not_started": 3
-}
-```
-
-### Mark Finished
-
-`POST /api/books/{id}/mark_finished/` sets `reading_status` to `finished` and `current_page` to `total_pages`.
-
-## Validation Rules
-
-- Title and author cannot be empty or whitespace-only
-- `current_page` cannot exceed `total_pages` (when `total_pages > 0`)
-- Setting `reading_status` to `finished` automatically sets `current_page = total_pages`
-
-## Admin
-
-Books are registered in Django admin with list display, filters by `reading_status` and `genre`, and search by `title`/`author`.

docs/frontend/component-spec.md

@@ -1,82 +0,0 @@
-# Frontend Component Specification — Cloud Reader
-
-## Overview
-
-React 19 + TypeScript SPA using Vite for development and production builds. State managed via React hooks and Context API. Routing via `react-router-dom` v7 with `lazy`/`Suspense` for code splitting.
-
-## Components
-
-### App (root)
-
-- **Path:** `/`
-- **Layout:** Header with logo + `<Routes>` wrapper
-- **Routing:** `/` → `Library`, `*` → redirect to `/`
-- **Code splitting:** `Library` loaded via `React.lazy` + `<Suspense>`
-
-### Library
-
-- **State:** `books[]`, `stats`, `search`, `sortBy`, `statusFilter`, `currentPage`, `view`
-- **Views:** `library` (grid), `detail` (selected book), `add` (modal form)
-- **Sub-components:** `BookCard`, `BookDetail`, `BookForm`
-- **Data flow:** Calls `fetchBooks()` on mount and when filters/page change
-
-### BookCard
-
-- **Props:** `{ book: Book, onClick: (book: Book) => void }`
-- **Display:** Cover image (or first-letter placeholder), title, author, genre badge, reading progress bar with status color
-- **Interaction:** Click/keyboard-accessible (Enter/Space)
-
-### BookDetail
-
-- **Props:** `{ bookId: number, onBack: () => void, onUpdated: () => void }`
-- **Sections:** Cover, metadata (title, author, genre, ISBN), progress bar with page count, action buttons
-- **Actions:** Mark as Finished, Edit Details (switches to BookForm), Delete (with confirmation)
-- **States:** Loading, error, editing mode
-
-### BookForm
-
-- **Props:** `{ initialData?: Book, onSubmit: (data: BookFormData) => Promise<void>, onCancel: () => void }`
-- **Fields:** Title*, Author*, Genre, Description, Cover URL, ISBN, Total Pages, Current Page, Status
-- **Client validation:** Title/author required, page ≤ total pages
-- **Loading state:** Submit button shows "Saving..." when `isLoading`
-
-## Types
-
-```typescript
-interface Book {
-  id: number; title: string; author: string; genre: string;
-  description: string; cover_image_url: string; isbn: string;
-  total_pages: number; current_page: number;
-  reading_status: ReadingStatus; reading_progress: number;
-  owner: string; created_at: string; updated_at: string;
-}
-
-type ReadingStatus = 'not_started' | 'reading' | 'finished' | 'dnf';
-
-interface BookFormData {
-  title: string; author: string; genre: string;
-  description: string; cover_image_url: string; isbn: string;
-  total_pages: number; current_page: number; reading_status: ReadingStatus;
-}
-```
-
-## API Client (`api/books.ts`)
-
-| Function             | HTTP Call                          |
-|----------------------|------------------------------------|
-| `fetchBooks(params)` | `GET /api/books/`                  |
-| `fetchBook(id)`      | `GET /api/books/{id}/`             |
-| `createBook(data)`   | `POST /api/books/`                 |
-| `updateBook(id, data)` | `PATCH /api/books/{id}/`        |
-| `deleteBook(id)`     | `DELETE /api/books/{id}/`          |
-| `markAsFinished(id)` | `POST /api/books/{id}/mark_finished/` |
-| `fetchBookStats()`   | `GET /api/books/stats/`            |
-
-## Styling
-
-Dark theme with CSS custom properties. All styles in `App.css`. Responsive grid layout with breakpoint at 768px.
-
-## Build & Dev
-
-- `yarn workspace frontend dev` — Vite dev server on port 5173 with API proxy to 127.0.0.1:8000
-- `yarn workspace frontend build` — TypeScript check + Vite production build

frontend/.gitignore

@@ -1,24 +0,0 @@
-# Logs
-logs
-*.log
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-pnpm-debug.log*
-lerna-debug.log*
-
-node_modules
-dist
-dist-ssr
-*.local
-
-# Editor directories and files
-.vscode/*
-!.vscode/extensions.json
-.idea
-.DS_Store
-*.suo
-*.ntvs*
-*.njsproj
-*.sln
-*.sw?

frontend/README.md

@@ -1,73 +0,0 @@
-# React + TypeScript + Vite
-
-This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
-
-Currently, two official plugins are available:
-
-- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Oxc](https://oxc.rs)
-- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/)
-
-## React Compiler
-
-The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
-
-## Expanding the ESLint configuration
-
-If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
-
-```js
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
-
-      // Remove tseslint.configs.recommended and replace with this
-      tseslint.configs.recommendedTypeChecked,
-      // Alternatively, use this for stricter rules
-      tseslint.configs.strictTypeChecked,
-      // Optionally, add this for stylistic rules
-      tseslint.configs.stylisticTypeChecked,
-
-      // Other configs...
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
-```
-
-You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
-
-```js
-// eslint.config.js
-import reactX from 'eslint-plugin-react-x'
-import reactDom from 'eslint-plugin-react-dom'
-
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
-      // Enable lint rules for React
-      reactX.configs['recommended-typescript'],
-      // Enable lint rules for React DOM
-      reactDom.configs.recommended,
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
-```

frontend/eslint.config.js

@@ -1,22 +0,0 @@
-import js from '@eslint/js'
-import globals from 'globals'
-import reactHooks from 'eslint-plugin-react-hooks'
-import reactRefresh from 'eslint-plugin-react-refresh'
-import tseslint from 'typescript-eslint'
-import { defineConfig, globalIgnores } from 'eslint/config'
-
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      js.configs.recommended,
-      tseslint.configs.recommended,
-      reactHooks.configs.flat.recommended,
-      reactRefresh.configs.vite,
-    ],
-    languageOptions: {
-      globals: globals.browser,
-    },
-  },
-])

frontend/index.html

@@ -1,10 +1,9 @@
-<!doctype html>
+<!DOCTYPE html>
 <html lang="en">
   <head>
     <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>frontend</title>
+    <title>Cloud Reader</title>
   </head>
   <body>
     <div id="root"></div>

frontend/package.json

@@ -1,32 +1,30 @@
 {
-  "name": "frontend",
+  "name": "@cloud-reader/frontend",
+  "version": "1.0.0",
   "private": true,
-  "version": "0.0.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
     "build": "tsc -b && vite build",
-    "lint": "eslint .",
+    "preview": "vite preview",
-    "preview": "vite preview"
+    "test": "vitest run",
+    "lint": "eslint ."
   },
   "dependencies": {
-    "axios": "^1.16.1",
+    "react": "^19.0.0",
-    "react": "^19.2.6",
+    "react-dom": "^19.0.0",
-    "react-dom": "^19.2.6",
+    "react-router-dom": "^7.1.0",
-    "react-router-dom": "^7.15.1"
+    "axios": "^1.7.9"
   },
   "devDependencies": {
-    "@eslint/js": "^10.0.1",
+    "@types/react": "^19.0.0",
-    "@types/node": "^24.12.3",
+    "@types/react-dom": "^19.0.0",
-    "@types/react": "^19.2.14",
+    "@vitejs/plugin-react": "^4.3.4",
-    "@types/react-dom": "^19.2.3",
+    "typescript": "~5.7.0",
-    "@vitejs/plugin-react": "^6.0.1",
+    "vite": "^6.0.0",
-    "eslint": "^10.3.0",
+    "vitest": "^2.1.0",
-    "eslint-plugin-react-hooks": "^7.1.1",
+    "@testing-library/react": "^16.2.0",
-    "eslint-plugin-react-refresh": "^0.5.2",
+    "@testing-library/jest-dom": "^6.6.3",
-    "globals": "^17.6.0",
+    "jsdom": "^25.0.0"
-    "typescript": "~6.0.2",
-    "typescript-eslint": "^8.59.2",
-    "vite": "^8.0.12"
   }
 }

frontend/public/icons.svg

@@ -1,24 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg">
-  <symbol id="bluesky-icon" viewBox="0 0 16 17">
-    <g clip-path="url(#bluesky-clip)"><path fill="#08060d" d="M7.75 7.735c-.693-1.348-2.58-3.86-4.334-5.097-1.68-1.187-2.32-.981-2.74-.79C.188 2.065.1 2.812.1 3.251s.241 3.602.398 4.13c.52 1.744 2.367 2.333 4.07 2.145-2.495.37-4.71 1.278-1.805 4.512 3.196 3.309 4.38-.71 4.987-2.746.608 2.036 1.307 5.91 4.93 2.746 2.72-2.746.747-4.143-1.747-4.512 1.702.189 3.55-.4 4.07-2.145.156-.528.397-3.691.397-4.13s-.088-1.186-.575-1.406c-.42-.19-1.06-.395-2.741.79-1.755 1.24-3.64 3.752-4.334 5.099"/></g>
-    <defs><clipPath id="bluesky-clip"><path fill="#fff" d="M.1.85h15.3v15.3H.1z"/></clipPath></defs>
-  </symbol>
-  <symbol id="discord-icon" viewBox="0 0 20 19">
-    <path fill="#08060d" d="M16.224 3.768a14.5 14.5 0 0 0-3.67-1.153c-.158.286-.343.67-.47.976a13.5 13.5 0 0 0-4.067 0c-.128-.306-.317-.69-.476-.976A14.4 14.4 0 0 0 3.868 3.77C1.546 7.28.916 10.703 1.231 14.077a14.7 14.7 0 0 0 4.5 2.306q.545-.748.965-1.587a9.5 9.5 0 0 1-1.518-.74q.191-.14.372-.293c2.927 1.369 6.107 1.369 8.999 0q.183.152.372.294-.723.437-1.52.74.418.838.963 1.588a14.6 14.6 0 0 0 4.504-2.308c.37-3.911-.63-7.302-2.644-10.309m-9.13 8.234c-.878 0-1.599-.82-1.599-1.82 0-.998.705-1.82 1.6-1.82.894 0 1.614.82 1.599 1.82.001 1-.705 1.82-1.6 1.82m5.91 0c-.878 0-1.599-.82-1.599-1.82 0-.998.705-1.82 1.6-1.82.893 0 1.614.82 1.599 1.82 0 1-.706 1.82-1.6 1.82"/>
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-    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M12.5 6.667a4.167 4.167 0 1 0-8.334 0 4.167 4.167 0 0 0 8.334 0"/>
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frontend/src/App.css

@@ -1,577 +0,0 @@
-/* === Reset & Base === */
-*,
-*::before,
-*::after {
-  box-sizing: border-box;
-  margin: 0;
-  padding: 0;
-}
-
-:root {
-  --color-bg: #0f1117;
-  --color-surface: #1a1d27;
-  --color-surface-hover: #242736;
-  --color-border: #2a2d3a;
-  --color-text: #e1e3ea;
-  --color-text-muted: #8b8fa3;
-  --color-primary: #6366f1;
-  --color-primary-hover: #4f46e5;
-  --color-success: #22c55e;
-  --color-danger: #ef4444;
-  --color-danger-hover: #dc2626;
-  --color-secondary: #374151;
-  --color-secondary-hover: #4b5563;
-  --radius: 8px;
-  --radius-lg: 12px;
-}
-
-body {
-  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
-  background-color: var(--color-bg);
-  color: var(--color-text);
-  line-height: 1.6;
-  -webkit-font-smoothing: antialiased;
-}
-
-/* === App Layout === */
-.app {
-  min-height: 100vh;
-  display: flex;
-  flex-direction: column;
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-
-.app-header {
-  background-color: var(--color-surface);
-  border-bottom: 1px solid var(--color-border);
-  padding: 0 24px;
-  position: sticky;
-  top: 0;
-  z-index: 100;
-}
-
-.app-header-inner {
-  max-width: 1200px;
-  margin: 0 auto;
-  height: 56px;
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-
-.app-logo {
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-
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-.app-main {
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-/* === Library === */
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-.library-header h1 {
-  font-size: 1.75rem;
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-.stat-card {
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-.stat-value {
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-/* === Buttons === */
-.btn {
-  display: inline-flex;
-  align-items: center;
-  gap: 6px;
-  padding: 8px 16px;
-  border: none;
-  border-radius: var(--radius);
-  font-size: 0.875rem;
-  font-weight: 500;
-  cursor: pointer;
-  transition: background-color 0.15s;
-}
-
-.btn:disabled {
-  opacity: 0.5;
-  cursor: not-allowed;
-}
-
-.btn-primary {
-  background: var(--color-primary);
-  color: white;
-}
-
-.btn-primary:hover:not(:disabled) {
-  background: var(--color-primary-hover);
-}
-
-.btn-secondary {
-  background: var(--color-secondary);
-  color: var(--color-text);
-}
-
-.btn-secondary:hover:not(:disabled) {
-  background: var(--color-secondary-hover);
-}
-
-.btn-success {
-  background: var(--color-success);
-  color: white;
-}
-
-.btn-success:hover:not(:disabled) {
-  background: #16a34a;
-}
-
-.btn-danger {
-  background: var(--color-danger);
-  color: white;
-}
-
-.btn-danger:hover:not(:disabled) {
-  background: var(--color-danger-hover);
-}
-
-/* === Book Detail === */
-.book-detail {
-  max-width: 800px;
-}
-
-.book-detail > .btn {
-  margin-bottom: 24px;
-}
-
-.book-detail-header {
-  display: flex;
-  gap: 32px;
-  margin-bottom: 32px;
-}
-
-.book-detail-cover {
-  flex-shrink: 0;
-  width: 180px;
-  height: 260px;
-  border-radius: var(--radius-lg);
-  overflow: hidden;
-}
-
-.book-detail-cover img {
-  width: 100%;
-  height: 100%;
-  object-fit: cover;
-}
-
-.book-detail-meta {
-  flex: 1;
-}
-
-.book-detail-meta h1 {
-  font-size: 1.75rem;
-  font-weight: 700;
-  margin-bottom: 4px;
-}
-
-.book-detail-author {
-  font-size: 1.1rem;
-  color: var(--color-text-muted);
-  margin-bottom: 12px;
-}
-
-.book-detail-isbn {
-  font-size: 0.85rem;
-  color: var(--color-text-muted);
-  margin-top: 8px;
-}
-
-.book-detail-progress {
-  margin: 20px 0;
-}
-
-.book-detail-progress .progress-text {
-  display: flex;
-  gap: 16px;
-  font-size: 0.85rem;
-}
-
-.book-detail-actions {
-  display: flex;
-  gap: 10px;
-  flex-wrap: wrap;
-}
-
-.book-detail-description {
-  background: var(--color-surface);
-  border: 1px solid var(--color-border);
-  border-radius: var(--radius-lg);
-  padding: 24px;
-}
-
-.book-detail-description h3 {
-  font-size: 1.1rem;
-  margin-bottom: 12px;
-}
-
-.book-detail-description p {
-  color: var(--color-text-muted);
-  line-height: 1.7;
-}
-
-/* === Form === */
-.book-form {
-  display: flex;
-  flex-direction: column;
-  gap: 16px;
-}
-
-.form-error {
-  background: rgba(239, 68, 68, 0.1);
-  border: 1px solid var(--color-danger);
-  color: var(--color-danger);
-  padding: 10px 14px;
-  border-radius: var(--radius);
-  font-size: 0.875rem;
-}
-
-.form-group {
-  display: flex;
-  flex-direction: column;
-  gap: 6px;
-}
-
-.form-group label {
-  font-size: 0.85rem;
-  font-weight: 500;
-  color: var(--color-text-muted);
-}
-
-.form-group input,
-.form-group textarea,
-.form-group select {
-  padding: 10px 14px;
-  background: var(--color-bg);
-  border: 1px solid var(--color-border);
-  border-radius: var(--radius);
-  color: var(--color-text);
-  font-size: 0.9rem;
-  font-family: inherit;
-}
-
-.form-group input:focus,
-.form-group textarea:focus,
-.form-group select:focus {
-  outline: none;
-  border-color: var(--color-primary);
-}
-
-.form-group textarea {
-  resize: vertical;
-  min-height: 80px;
-}
-
-.form-row {
-  display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
-  gap: 16px;
-}
-
-.form-actions {
-  display: flex;
-  gap: 10px;
-  margin-top: 8px;
-}
-
-/* === Modal === */
-.modal-overlay {
-  position: fixed;
-  inset: 0;
-  background: rgba(0, 0, 0, 0.6);
-  display: flex;
-  align-items: flex-start;
-  justify-content: center;
-  padding-top: 80px;
-  z-index: 200;
-}
-
-.modal-content {
-  background: var(--color-surface);
-  border: 1px solid var(--color-border);
-  border-radius: var(--radius-lg);
-  padding: 32px;
-  width: 100%;
-  max-width: 560px;
-  max-height: 80vh;
-  overflow-y: auto;
-}
-
-.modal-content h2 {
-  margin-bottom: 20px;
-}
-
-/* === Pagination === */
-.pagination {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  gap: 16px;
-  margin-top: 32px;
-}
-
-.page-info {
-  font-size: 0.875rem;
-  color: var(--color-text-muted);
-}
-
-/* === States === */
-.loading-spinner {
-  text-align: center;
-  padding: 48px;
-  color: var(--color-text-muted);
-  font-size: 1rem;
-}
-
-.empty-state {
-  text-align: center;
-  padding: 64px 24px;
-  color: var(--color-text-muted);
-}
-
-.empty-state p {
-  margin-bottom: 8px;
-}
-
-.error-message {
-  text-align: center;
-  padding: 32px;
-  color: var(--color-danger);
-}
-
-/* === Responsive === */
-@media (max-width: 768px) {
-  .books-grid {
-    grid-template-columns: 1fr;
-  }
-
-  .book-detail-header {
-    flex-direction: column;
-    align-items: center;
-    text-align: center;
-  }
-
-  .book-detail-actions {
-    justify-content: center;
-  }
-
-  .library-controls {
-    flex-direction: column;
-  }
-
-  .library-stats {
-    grid-template-columns: repeat(2, 1fr);
-  }
-
-  .form-row {
-    grid-template-columns: 1fr;
-  }
-}

frontend/src/App.tsx

@@ -1,32 +1,62 @@
-import { lazy, Suspense } from 'react';
+import React, { lazy, Suspense, useState } from "react";
-import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom';
+import { BrowserRouter, Navigate, Route, Routes } from "react-router-dom";
-import './App.css';
+import { AuthProvider, useAuth } from "./context/AuthContext";
 
-const Library = lazy(() => import('./components/Library').then((m) => ({ default: m.Library })));
+const LibraryPage = lazy(() => import("./pages/Library").then((m) => ({ default: m.LibraryPage })));
+const BookDetailPage = lazy(() => import("./pages/BookDetailPage").then((m) => ({ default: m.BookDetailPage })));
+const ReaderPage = lazy(() => import("./pages/Reader").then((m) => ({ default: m.ReaderPage })));
+const AddBookPage = lazy(() => import("./pages/AddBook").then((m) => ({ default: m.AddBookPage })));
+const EditEBookPage = lazy(() => import("./pages/EditEBook").then((m) => ({ default: m.EditEBookPage })));
+const SettingsPage = lazy(() => import("./pages/Settings").then((m) => ({ default: m.SettingsPage })));
+const BookmarksNotesPage = lazy(() => import("./components/annotations/BookmarksNotesPage").then((m) => ({ default: m.BookmarksNotesPage })));
+const ReadingPage = lazy(() => import("./pages/ReadingPage").then((m) => ({ default: m.default })));
 
-function App() {
+const AuthPage = lazy(() =>
+  import("./pages/AuthPage").then((m) => ({
+    default: () => {
+      const [isLogin, setIsLogin] = useState(true);
+      return isLogin ? <m.LoginPage onToggle={() => setIsLogin(false)} /> : <m.RegisterPage onToggle={() => setIsLogin(true)} />;
+    },
+  })),
+);
+
+function LoadingFallback() {
+  return <div style={{ display: "flex", justifyContent: "center", alignItems: "center", minHeight: "100vh", color: "#888", fontSize: 16 }}><p>Loading...</p></div>;
+}
+
+function ProtectedRoute({ children }: { children: React.ReactNode }) {
+  const { isAuthenticated, loading } = useAuth();
+  if (loading) return <LoadingFallback />;
+  if (!isAuthenticated) return <Navigate to="/auth" replace />;
+  return <>{children}</>;
+}
+
+function AppRoutes() {
+  const { isAuthenticated } = useAuth();
   return (
-    <BrowserRouter>
+    <Suspense fallback={<LoadingFallback />}>
-      <div className="app">
-        <header className="app-header">
-          <div className="app-header-inner">
-            <a href="/" className="app-logo" onClick={(e) => { e.preventDefault(); window.location.href = '/'; }}>
-              <span className="logo-icon">📚</span>
-              <span className="logo-text">Cloud Reader</span>
-            </a>
-          </div>
-        </header>
-        <main className="app-main">
-          <Suspense fallback={<div className="loading-spinner">Loading...</div>}>
       <Routes>
-              <Route path="/" element={<Library />} />
+        <Route path="/auth" element={isAuthenticated ? <Navigate to="/" replace /> : <AuthPage />} />
+        <Route path="/" element={<ProtectedRoute><LibraryPage /></ProtectedRoute>} />
+        <Route path="/books/:id" element={<ProtectedRoute><BookDetailPage /></ProtectedRoute>} />
+        <Route path="/reader/:id" element={<ProtectedRoute><ReaderPage /></ProtectedRoute>} />
+        <Route path="/read/:id" element={<ProtectedRoute><ReadingPage /></ProtectedRoute>} />
+        <Route path="/add" element={<ProtectedRoute><AddBookPage /></ProtectedRoute>} />
+        <Route path="/edit/:id" element={<ProtectedRoute><EditEBookPage /></ProtectedRoute>} />
+        <Route path="/settings" element={<ProtectedRoute><SettingsPage /></ProtectedRoute>} />
+        <Route path="/bookmarks-notes/:bookId?" element={<ProtectedRoute><BookmarksNotesPage /></ProtectedRoute>} />
         <Route path="*" element={<Navigate to="/" replace />} />
       </Routes>
     </Suspense>
-        </main>
-      </div>
-    </BrowserRouter>
   );
 }
 
-export default App;
+export default function App() {
+  return (
+    <BrowserRouter>
+      <AuthProvider>
+        <AppRoutes />
+      </AuthProvider>
+    </BrowserRouter>
+  );
+}

frontend/src/api/annotations.ts

@@ -0,0 +1,96 @@
+import api from "@/api/client";
+import type {
+  Bookmark,
+  CreateBookmarkPayload,
+  Note,
+  CreateNotePayload,
+  UpdateNotePayload,
+  PaginatedResponse,
+} from "@/types";
+
+/** Fetch bookmarks for the current user, optionally filtered by book */
+export async function fetchBookmarks(
+  bookId?: string
+): Promise<PaginatedResponse<Bookmark>> {
+  const params: Record<string, string> = {};
+  if (bookId) params.book = bookId;
+  const { data } = await api.get<PaginatedResponse<Bookmark>>(
+    "/annotations/bookmarks/",
+    { params }
+  );
+  return data;
+}
+
+/** Create a new bookmark */
+export async function createBookmark(
+  payload: CreateBookmarkPayload
+): Promise<Bookmark> {
+  const { data } = await api.post<Bookmark>(
+    "/annotations/bookmarks/",
+    payload
+  );
+  return data;
+}
+
+/** Delete a bookmark by id */
+export async function deleteBookmark(id: string): Promise<void> {
+  await api.delete(`/annotations/bookmarks/${id}/`);
+}
+
+/** Batch delete bookmarks */
+export async function batchDeleteBookmarks(
+  ids: string[]
+): Promise<{ deleted: number }> {
+  const { data } = await api.delete<{ deleted: number }>(
+    "/annotations/bookmarks/batch-delete/",
+    { data: { ids } }
+  );
+  return data;
+}
+
+/** Fetch notes for the current user, optionally filtered by book */
+export async function fetchNotes(
+  bookId?: string
+): Promise<PaginatedResponse<Note>> {
+  const params: Record<string, string> = {};
+  if (bookId) params.book = bookId;
+  const { data } = await api.get<PaginatedResponse<Note>>(
+    "/annotations/notes/",
+    { params }
+  );
+  return data;
+}
+
+/** Create a new note */
+export async function createNote(payload: CreateNotePayload): Promise<Note> {
+  const { data } = await api.post<Note>("/annotations/notes/", payload);
+  return data;
+}
+
+/** Update a note's content */
+export async function updateNote(
+  id: string,
+  payload: UpdateNotePayload
+): Promise<Note> {
+  const { data } = await api.patch<Note>(
+    `/annotations/notes/${id}/`,
+    payload
+  );
+  return data;
+}
+
+/** Delete a note by id */
+export async function deleteNote(id: string): Promise<void> {
+  await api.delete(`/annotations/notes/${id}/`);
+}
+
+/** Batch delete notes */
+export async function batchDeleteNotes(
+  ids: string[]
+): Promise<{ deleted: number }> {
+  const { data } = await api.delete<{ deleted: number }>(
+    "/annotations/notes/batch-delete/",
+    { data: { ids } }
+  );
+  return data;
+}

frontend/src/api/books.ts

@@ -1,90 +0,0 @@
-import axios from 'axios';
-import type { Book, BookFormData, BookListResponse, BookStats } from '../types';
-
-const api = axios.create({
-  baseURL: '/api',
-  headers: {
-    'Content-Type': 'application/json',
-  },
-  withCredentials: true,
-});
-
-api.interceptors.response.use(
-  (response) => response,
-  (error) => {
-    if (error.response?.status === 403) {
-      window.location.href = '/login';
-    }
-    return Promise.reject(error);
-  },
-);
-
-export async function fetchBooks(params?: {
-  page?: number;
-  sort_by?: string;
-  reading_status?: string;
-  search?: string;
-}): Promise<BookListResponse> {
-  const response = await api.get<BookListResponse>('/books/', { params });
-  return response.data;
-}
-
-export async function fetchBook(id: number): Promise<Book> {
-  const response = await api.get<Book>(`/books/${id}/`);
-  return response.data;
-}
-
-export async function createBook(data: BookFormData): Promise<Book> {
-  const response = await api.post<Book>('/books/', data);
-  return response.data;
-}
-
-export async function updateBook(id: number, data: Partial<BookFormData>): Promise<Book> {
-  const response = await api.patch<Book>(`/books/${id}/`, data);
-  return response.data;
-}
-
-export async function deleteBook(id: number): Promise<void> {
-  await api.delete(`/books/${id}/`);
-}
-
-export async function markBookAsFinished(id: number): Promise<Book> {
-  const response = await api.post<Book>(`/books/${id}/mark_finished/`);
-  return response.data;
-}
-
-export async function fetchBookStats(): Promise<BookStats> {
-  const response = await api.get<BookStats>('/books/stats/');
-  return response.data;
-}
-
-export async function login(username: string, password: string): Promise<void> {
-  // Get CSRF token from any existing session
-  const csrfToken = extractCsrfToken();
-  if (!csrfToken) {
-    // Make a light request to set the CSRF cookie
-    await fetch('/api/books/', { credentials: 'include' });
-  }
-  const token = extractCsrfToken();
-
-  const resp = await fetch('/api-auth/login/', {
-    method: 'POST',
-    headers: {
-      'Content-Type': 'application/x-www-form-urlencoded',
-      'X-CSRFToken': token,
-    },
-    body: new URLSearchParams({ username, password }),
-    credentials: 'include',
-  });
-
-  if (!resp.ok) {
-    throw new Error('Login failed');
-  }
-}
-
-function extractCsrfToken(): string {
-  const match = document.cookie.match(/csrftoken=([\w-]+)/);
-  return match ? match[1] : '';
-}
-
-export default api;

frontend/src/api/client.ts

@@ -0,0 +1,67 @@
+import axios from "axios";
+
+const api = axios.create({
+  baseURL: "/api",
+  headers: {
+    "Content-Type": "application/json",
+  },
+});
+
+// Attach JWT token to every request
+api.interceptors.request.use((config) => {
+  const token = localStorage.getItem("access_token");
+  if (token) {
+    config.headers.Authorization = `Bearer ${token}`;
+  }
+  return config;
+});
+
+// Attempt token refresh on 401
+let isRefreshing = false;
+let pendingRequests: Array<(token: string) => void> = [];
+
+api.interceptors.response.use(
+  (response) => response,
+  async (error) => {
+    const originalRequest = error.config;
+    if (error.response?.status !== 401 || originalRequest._retry) {
+      return Promise.reject(error);
+    }
+
+    if (isRefreshing) {
+      return new Promise((resolve) => {
+        pendingRequests.push((token: string) => {
+          originalRequest.headers.Authorization = `Bearer ${token}`;
+          resolve(api(originalRequest));
+        });
+      });
+    }
+
+    originalRequest._retry = true;
+    isRefreshing = true;
+
+    try {
+      const refreshToken = localStorage.getItem("refresh_token");
+      if (!refreshToken) {
+        throw new Error("No refresh token");
+      }
+      const { data } = await axios.post("/api/auth/token/refresh/", {
+        refresh: refreshToken,
+      });
+      localStorage.setItem("access_token", data.access);
+      pendingRequests.forEach((cb) => cb(data.access));
+      pendingRequests = [];
+      originalRequest.headers.Authorization = `Bearer ${data.access}`;
+      return api(originalRequest);
+    } catch {
+      localStorage.removeItem("access_token");
+      localStorage.removeItem("refresh_token");
+      window.location.href = "/login";
+      return Promise.reject(error);
+    } finally {
+      isRefreshing = false;
+    }
+  }
+);
+
+export default api;

frontend/src/api/reader.ts

@@ -0,0 +1,112 @@
+/**
+ * API client for the reader module — reading settings, chapters, and progress.
+ */
+
+import type {
+  ChapterDetail,
+  ChapterSummary,
+  ReadingProgress,
+  ReadingSettings,
+} from "../types/reader";
+
+const API_BASE = "/api";
+
+/**
+ * Fetch the current user's reading settings.
+ * Auto-creates defaults on the server if none exist.
+ */
+export async function getReadingSettings(): Promise<ReadingSettings> {
+  const response = await fetch(`${API_BASE}/reader/settings/`);
+  if (!response.ok) {
+    throw new Error(
+      `Failed to fetch reading settings: ${response.status} ${response.statusText}`
+    );
+  }
+  return response.json() as Promise<ReadingSettings>;
+}
+
+/**
+ * Update (full or partial) the user's reading settings.
+ */
+export async function updateReadingSettings(
+  settings: Partial<ReadingSettings>
+): Promise<ReadingSettings> {
+  const method = settings.theme !== undefined ? "PUT" : "PATCH";
+  const response = await fetch(`${API_BASE}/reader/settings/`, {
+    method,
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(settings),
+  });
+  if (!response.ok) {
+    throw new Error(
+      `Failed to update reading settings: ${response.status} ${response.statusText}`
+    );
+  }
+  return response.json() as Promise<ReadingSettings>;
+}
+
+/**
+ * Fetch the table of contents (chapter list) for a book.
+ */
+export async function getChapters(bookId: number): Promise<ChapterSummary[]> {
+  const response = await fetch(`${API_BASE}/books/${bookId}/chapters/`);
+  if (!response.ok) {
+    throw new Error(
+      `Failed to fetch chapters: ${response.status} ${response.statusText}`
+    );
+  }
+  return response.json() as Promise<ChapterSummary[]>;
+}
+
+/**
+ * Fetch a specific chapter with full content for reading.
+ */
+export async function getChapterContent(
+  bookId: number,
+  chapterNumber: number
+): Promise<ChapterDetail> {
+  const response = await fetch(
+    `${API_BASE}/books/${bookId}/chapters/${chapterNumber}/`
+  );
+  if (!response.ok) {
+    throw new Error(
+      `Failed to fetch chapter ${chapterNumber}: ${response.status} ${response.statusText}`
+    );
+  }
+  return response.json() as Promise<ChapterDetail>;
+}
+
+/**
+ * Fetch reading progress for a book.
+ */
+export async function getReadingProgress(
+  bookId: number
+): Promise<ReadingProgress> {
+  const response = await fetch(`${API_BASE}/books/${bookId}/progress/`);
+  if (!response.ok) {
+    throw new Error(
+      `Failed to fetch reading progress: ${response.status} ${response.statusText}`
+    );
+  }
+  return response.json() as Promise<ReadingProgress>;
+}
+
+/**
+ * Update reading progress for a book.
+ */
+export async function updateReadingProgress(
+  bookId: number,
+  progress: Partial<ReadingProgress>
+): Promise<ReadingProgress> {
+  const response = await fetch(`${API_BASE}/books/${bookId}/progress/`, {
+    method: "PUT",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(progress),
+  });
+  if (!response.ok) {
+    throw new Error(
+      `Failed to update reading progress: ${response.status} ${response.statusText}`
+    );
+  }
+  return response.json() as Promise<ReadingProgress>;
+}

frontend/src/assets/react.svg

@@ -1 +0,0 @@
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frontend/src/components/BookCard.tsx

@@ -1,54 +0,0 @@
-import type { Book } from '../types';
-import { READING_STATUS_LABELS, READING_STATUS_COLORS } from '../types';
-
-interface BookCardProps {
-  book: Book;
-  onClick: (book: Book) => void;
-}
-
-export function BookCard({ book, onClick }: BookCardProps) {
-  const progress = book.reading_progress;
-  const statusColor = READING_STATUS_COLORS[book.reading_status];
-
-  return (
-    <article
-      className="book-card"
-      onClick={() => onClick(book)}
-      role="button"
-      tabIndex={0}
-      onKeyDown={(e: React.KeyboardEvent) => {
-        if (e.key === 'Enter' || e.key === ' ') {
-          e.preventDefault();
-          onClick(book);
-        }
-      }}
-    >
-      <div className="book-card-cover">
-        {book.cover_image_url ? (
-          <img src={book.cover_image_url} alt={`Cover of ${book.title}`} loading="lazy" />
-        ) : (
-          <div className="book-card-placeholder">
-            <span>{book.title.charAt(0)}</span>
-          </div>
-        )}
-      </div>
-      <div className="book-card-info">
-        <h3 className="book-card-title">{book.title}</h3>
-        <p className="book-card-author">{book.author}</p>
-        {book.genre && <span className="book-card-genre">{book.genre}</span>}
-        <div className="book-card-progress">
-          <div className="progress-bar">
-            <div
-              className="progress-fill"
-              style={{ width: `${Math.min(progress, 100)}%`, backgroundColor: statusColor }}
-            />
-          </div>
-          <div className="progress-text">
-            <span style={{ color: statusColor }}>{READING_STATUS_LABELS[book.reading_status]}</span>
-            <span>{progress}%</span>
-          </div>
-        </div>
-      </div>
-    </article>
-  );
-}

frontend/src/components/BookDetail.tsx

@@ -1,151 +0,0 @@
-import { useState, useEffect, useCallback } from 'react';
-import type { Book, BookFormData } from '../types';
-import { READING_STATUS_LABELS, READING_STATUS_COLORS } from '../types';
-import { fetchBook, updateBook, markBookAsFinished, deleteBook } from '../api/books';
-import { BookForm } from './BookForm';
-
-interface BookDetailProps {
-  bookId: number;
-  onBack: () => void;
-  onUpdated: () => void;
-}
-
-export function BookDetail({ bookId, onBack, onUpdated }: BookDetailProps) {
-  const [book, setBook] = useState<Book | null>(null);
-  const [loading, setLoading] = useState(true);
-  const [editing, setEditing] = useState(false);
-  const [error, setError] = useState<string | null>(null);
-
-  const loadBook = useCallback(async () => {
-    setLoading(true);
-    setError(null);
-    try {
-      const data = await fetchBook(bookId);
-      setBook(data);
-    } catch {
-      setError('Failed to load book details.');
-    } finally {
-      setLoading(false);
-    }
-  }, [bookId]);
-
-  useEffect(() => {
-    loadBook();
-  }, [loadBook]);
-
-  const handleUpdate = useCallback(
-    async (formData: BookFormData) => {
-      const updated = await updateBook(bookId, formData);
-      setBook(updated);
-      setEditing(false);
-      onUpdated();
-    },
-    [bookId, onUpdated],
-  );
-
-  const handleMarkFinished = useCallback(async () => {
-    const updated = await markBookAsFinished(bookId);
-    setBook(updated);
-    onUpdated();
-  }, [bookId, onUpdated]);
-
-  const handleDelete = useCallback(async () => {
-    if (!window.confirm('Are you sure you want to delete this book?')) return;
-    await deleteBook(bookId);
-    onBack();
-    onUpdated();
-  }, [bookId, onBack, onUpdated]);
-
-  if (loading) {
-    return <div className="loading-spinner">Loading...</div>;
-  }
-
-  if (error || !book) {
-    return <div className="error-message">{error ?? 'Book not found.'}</div>;
-  }
-
-  if (editing) {
-    return (
-      <div className="book-detail">
-        <button className="btn btn-secondary" onClick={() => setEditing(false)}>
-          ← Back to Details
-        </button>
-        <h2>Edit Book</h2>
-        <BookForm
-          initialData={book}
-          onSubmit={handleUpdate}
-          onCancel={() => setEditing(false)}
-        />
-      </div>
-    );
-  }
-
-  const statusColor = READING_STATUS_COLORS[book.reading_status];
-
-  return (
-    <div className="book-detail">
-      <button className="btn btn-secondary" onClick={onBack}>
-        ← Back to Library
-      </button>
-
-      <div className="book-detail-header">
-        <div className="book-detail-cover">
-          {book.cover_image_url ? (
-            <img src={book.cover_image_url} alt={`Cover of ${book.title}`} />
-          ) : (
-            <div className="book-card-placeholder large">
-              <span>{book.title.charAt(0)}</span>
-            </div>
-          )}
-        </div>
-        <div className="book-detail-meta">
-          <h1>{book.title}</h1>
-          <p className="book-detail-author">by {book.author}</p>
-          {book.genre && <span className="book-card-genre">{book.genre}</span>}
-          {book.isbn && <p className="book-detail-isbn">ISBN: {book.isbn}</p>}
-
-          <div className="book-detail-progress">
-            <div className="progress-bar large">
-              <div
-                className="progress-fill"
-                style={{ width: `${Math.min(book.reading_progress, 100)}%`, backgroundColor: statusColor }}
-              />
-            </div>
-            <div className="progress-text">
-              <span style={{ color: statusColor }}>
-                {READING_STATUS_LABELS[book.reading_status]}
-              </span>
-              <span>{book.reading_progress}% complete</span>
-              {book.total_pages > 0 && (
-                <span>
-                  Page {book.current_page} of {book.total_pages}
-                </span>
-              )}
-            </div>
-          </div>
-
-          <div className="book-detail-actions">
-            {book.reading_status !== 'finished' && (
-              <button className="btn btn-success" onClick={handleMarkFinished}>
-                Mark as Finished
-              </button>
-            )}
-            <button className="btn btn-primary" onClick={() => setEditing(true)}>
-              Edit Details
-            </button>
-            <button className="btn btn-danger" onClick={handleDelete}>
-              Delete
-            </button>
-          </div>
-        </div>
-      </div>
-
-      {book.description && (
-        <div className="book-detail-description">
-          <h3>Description</h3>
-          <p>{book.description}</p>
-        </div>
-      )}
-    </div>
-  );
-}

frontend/src/components/BookForm.tsx

@@ -1,209 +0,0 @@
-import { useState, useCallback, useEffect, useRef } from 'react';
-import type { Book, BookFormData, ReadingStatus } from '../types';
-import { READING_STATUS_LABELS } from '../types';
-
-interface BookFormProps {
-  initialData?: Book;
-  onSubmit: (data: BookFormData) => Promise<void>;
-  onCancel: () => void;
-  isLoading?: boolean;
-}
-
-export function BookForm({ initialData, onSubmit, onCancel, isLoading }: BookFormProps) {
-  const [formData, setFormData] = useState<BookFormData>({
-    title: initialData?.title ?? '',
-    author: initialData?.author ?? '',
-    genre: initialData?.genre ?? '',
-    description: initialData?.description ?? '',
-    cover_image_url: initialData?.cover_image_url ?? '',
-    isbn: initialData?.isbn ?? '',
-    total_pages: initialData?.total_pages ?? 0,
-    current_page: initialData?.current_page ?? 0,
-    reading_status: initialData?.reading_status ?? 'not_started',
-  });
-  const [error, setError] = useState<string | null>(null);
-  const titleRef = useRef<HTMLInputElement>(null);
-
-  useEffect(() => {
-    titleRef.current?.focus();
-  }, []);
-
-  const handleChange = useCallback(
-    (e: React.ChangeEvent<HTMLInputElement | HTMLTextAreaElement | HTMLSelectElement>) => {
-      const { name, value } = e.target;
-      setFormData((prev) => ({
-        ...prev,
-        [name]:
-          name === 'total_pages' || name === 'current_page'
-            ? Math.max(0, parseInt(value, 10) || 0)
-            : value,
-      }));
-    },
-    [],
-  );
-
-  const handleSubmit = useCallback(
-    async (e: React.FormEvent) => {
-      e.preventDefault();
-      setError(null);
-
-      if (!formData.title.trim()) {
-        setError('Title is required.');
-        return;
-      }
-      if (!formData.author.trim()) {
-        setError('Author is required.');
-        return;
-      }
-      if (formData.current_page > formData.total_pages && formData.total_pages > 0) {
-        setError('Current page cannot exceed total pages.');
-        return;
-      }
-
-      try {
-        await onSubmit(formData);
-      } catch (err) {
-        if (err instanceof Error) {
-          setError(err.message);
-        } else {
-          setError('Failed to save book.');
-        }
-      }
-    },
-    [formData, onSubmit],
-  );
-
-  return (
-    <form onSubmit={handleSubmit} className="book-form">
-      {error && <div className="form-error">{error}</div>}
-
-      <div className="form-group">
-        <label htmlFor="title">Title *</label>
-        <input
-          ref={titleRef}
-          id="title"
-          name="title"
-          type="text"
-          value={formData.title}
-          onChange={handleChange}
-          placeholder="Book title"
-          required
-        />
-      </div>
-
-      <div className="form-group">
-        <label htmlFor="author">Author *</label>
-        <input
-          id="author"
-          name="author"
-          type="text"
-          value={formData.author}
-          onChange={handleChange}
-          placeholder="Author name"
-          required
-        />
-      </div>
-
-      <div className="form-row">
-        <div className="form-group">
-          <label htmlFor="genre">Genre</label>
-          <input
-            id="genre"
-            name="genre"
-            type="text"
-            value={formData.genre}
-            onChange={handleChange}
-            placeholder="e.g. Fiction, Science"
-          />
-        </div>
-
-        <div className="form-group">
-          <label htmlFor="isbn">ISBN</label>
-          <input
-            id="isbn"
-            name="isbn"
-            type="text"
-            value={formData.isbn}
-            onChange={handleChange}
-            placeholder="ISBN number"
-          />
-        </div>
-      </div>
-
-      <div className="form-group">
-        <label htmlFor="description">Description</label>
-        <textarea
-          id="description"
-          name="description"
-          value={formData.description}
-          onChange={handleChange}
-          placeholder="Book description"
-          rows={3}
-        />
-      </div>
-
-      <div className="form-group">
-        <label htmlFor="cover_image_url">Cover Image URL</label>
-        <input
-          id="cover_image_url"
-          name="cover_image_url"
-          type="url"
-          value={formData.cover_image_url}
-          onChange={handleChange}
-          placeholder="https://example.com/cover.jpg"
-        />
-      </div>
-
-      <div className="form-row">
-        <div className="form-group">
-          <label htmlFor="total_pages">Total Pages</label>
-          <input
-            id="total_pages"
-            name="total_pages"
-            type="number"
-            min={0}
-            value={formData.total_pages}
-            onChange={handleChange}
-          />
-        </div>
-
-        <div className="form-group">
-          <label htmlFor="current_page">Current Page</label>
-          <input
-            id="current_page"
-            name="current_page"
-            type="number"
-            min={0}
-            value={formData.current_page}
-            onChange={handleChange}
-          />
-        </div>
-
-        <div className="form-group">
-          <label htmlFor="reading_status">Status</label>
-          <select
-            id="reading_status"
-            name="reading_status"
-            value={formData.reading_status}
-            onChange={handleChange}
-          >
-            {(Object.keys(READING_STATUS_LABELS) as ReadingStatus[]).map((status) => (
-              <option key={status} value={status}>
-                {READING_STATUS_LABELS[status]}
-              </option>
-            ))}
-          </select>
-        </div>
-      </div>
-
-      <div className="form-actions">
-        <button type="submit" className="btn btn-primary" disabled={isLoading}>
-          {isLoading ? 'Saving...' : initialData ? 'Update Book' : 'Add Book'}
-        </button>
-        <button type="button" className="btn btn-secondary" onClick={onCancel}>
-          Cancel
-        </button>
-      </div>
-    </form>
-  );
-}

frontend/src/components/Library.tsx

@@ -1,227 +0,0 @@
-import { useState, useEffect, useCallback, useMemo } from 'react';
-import type { Book, ReadingStatus } from '../types';
-import { READING_STATUS_LABELS } from '../types';
-import { fetchBooks, fetchBookStats, createBook } from '../api/books';
-import type { BookStats, BookFormData } from '../types';
-import { BookCard } from './BookCard';
-import { BookDetail } from './BookDetail';
-import { BookForm } from './BookForm';
-
-type View = 'library' | 'detail' | 'add';
-
-export function Library() {
-  const [view, setView] = useState<View>('library');
-  const [selectedBookId, setSelectedBookId] = useState<number | null>(null);
-  const [books, setBooks] = useState<Book[]>([]);
-  const [stats, setStats] = useState<BookStats | null>(null);
-  const [loading, setLoading] = useState(true);
-  const [search, setSearch] = useState('');
-  const [sortBy, setSortBy] = useState('-updated_at');
-  const [statusFilter, setStatusFilter] = useState<string>('');
-  const [currentPage, setCurrentPage] = useState(1);
-  const [totalCount, setTotalCount] = useState(0);
-  const [showForm, setShowForm] = useState(false);
-
-  const loadBooks = useCallback(async () => {
-    setLoading(true);
-    try {
-      const data = await fetchBooks({
-        page: currentPage,
-        sort_by: sortBy || undefined,
-        reading_status: statusFilter || undefined,
-        search: search || undefined,
-      });
-      setBooks(data.results);
-      setTotalCount(data.count);
-    } catch {
-      setBooks([]);
-    } finally {
-      setLoading(false);
-    }
-  }, [currentPage, sortBy, statusFilter, search]);
-
-  const loadStats = useCallback(async () => {
-    try {
-      const data = await fetchBookStats();
-      setStats(data);
-    } catch {
-      // Stats are non-critical
-    }
-  }, []);
-
-  useEffect(() => {
-    loadBooks();
-    loadStats();
-  }, [loadBooks, loadStats]);
-
-  const handleBookClick = useCallback((book: Book) => {
-    setSelectedBookId(book.id);
-    setView('detail');
-  }, []);
-
-  const handleBackToLibrary = useCallback(() => {
-    setView('library');
-    setSelectedBookId(null);
-  }, []);
-
-  const handleUpdated = useCallback(() => {
-    loadBooks();
-    loadStats();
-  }, [loadBooks, loadStats]);
-
-  const handleAddBook = useCallback(
-    async (data: BookFormData) => {
-      await createBook(data);
-      setShowForm(false);
-      await loadBooks();
-      await loadStats();
-    },
-    [loadBooks, loadStats],
-  );
-
-  const totalPages = useMemo(() => Math.max(1, Math.ceil(totalCount / 20)), [totalCount]);
-
-  if (view === 'detail' && selectedBookId) {
-    return (
-      <BookDetail
-        bookId={selectedBookId}
-        onBack={handleBackToLibrary}
-        onUpdated={handleUpdated}
-      />
-    );
-  }
-
-  return (
-    <div className="library">
-      <div className="library-header">
-        <h1>My Library</h1>
-        <button className="btn btn-primary" onClick={() => setShowForm(true)}>
-          + Add Book
-        </button>
-      </div>
-
-      {stats && (
-        <div className="library-stats">
-          <div className="stat-card">
-            <span className="stat-value">{stats.total_books}</span>
-            <span className="stat-label">Total</span>
-          </div>
-          <div className="stat-card">
-            <span className="stat-value" style={{ color: '#22c55e' }}>{stats.finished}</span>
-            <span className="stat-label">Finished</span>
-          </div>
-          <div className="stat-card">
-            <span className="stat-value" style={{ color: '#3b82f6' }}>{stats.reading}</span>
-            <span className="stat-label">Reading</span>
-          </div>
-          <div className="stat-card">
-            <span className="stat-value" style={{ color: '#6b7280' }}>{stats.not_started}</span>
-            <span className="stat-label">Unread</span>
-          </div>
-        </div>
-      )}
-
-      {showForm && (
-        <div className="modal-overlay">
-          <div className="modal-content">
-            <h2>Add New Book</h2>
-            <BookForm
-              onSubmit={handleAddBook}
-              onCancel={() => setShowForm(false)}
-            />
-          </div>
-        </div>
-      )}
-
-      <div className="library-controls">
-        <input
-          type="search"
-          className="search-input"
-          placeholder="Search by title or author..."
-          value={search}
-          onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
-            setSearch(e.target.value);
-            setCurrentPage(1);
-          }}
-        />
-
-        <select
-          value={sortBy}
-          onChange={(e: React.ChangeEvent<HTMLSelectElement>) => {
-            setSortBy(e.target.value);
-            setCurrentPage(1);
-          }}
-          className="sort-select"
-        >
-          <option value="-updated_at">Recently Updated</option>
-          <option value="title">Title (A-Z)</option>
-          <option value="-title">Title (Z-A)</option>
-          <option value="author">Author (A-Z)</option>
-          <option value="-author">Author (Z-A)</option>
-          <option value="-created_at">Recently Added</option>
-          <option value="-reading_progress">Most Progress</option>
-          <option value="reading_progress">Least Progress</option>
-        </select>
-
-        <select
-          value={statusFilter}
-          onChange={(e: React.ChangeEvent<HTMLSelectElement>) => {
-            setStatusFilter(e.target.value);
-            setCurrentPage(1);
-          }}
-          className="filter-select"
-        >
-          <option value="">All Status</option>
-          {(Object.keys(READING_STATUS_LABELS) as ReadingStatus[]).map((status) => (
-            <option key={status} value={status}>
-              {READING_STATUS_LABELS[status]}
-            </option>
-          ))}
-        </select>
-      </div>
-
-      {loading ? (
-        <div className="loading-spinner">Loading books...</div>
-      ) : books.length === 0 ? (
-        <div className="empty-state">
-          <p>No books found.</p>
-          {search || statusFilter ? (
-            <p>Try adjusting your search or filters.</p>
-          ) : (
-            <p>Add your first book to get started!</p>
-          )}
-        </div>
-      ) : (
-        <>
-          <div className="books-grid">
-            {books.map((book) => (
-              <BookCard key={book.id} book={book} onClick={handleBookClick} />
-            ))}
-          </div>
-
-          {totalPages > 1 && (
-            <div className="pagination">
-              <button
-                className="btn btn-secondary"
-                disabled={currentPage <= 1}
-                onClick={() => setCurrentPage((p) => Math.max(1, p - 1))}
-              >
-                ← Previous
-              </button>
-              <span className="page-info">
-                Page {currentPage} of {totalPages}
-              </span>
-              <button
-                className="btn btn-secondary"
-                disabled={currentPage >= totalPages}
-                onClick={() => setCurrentPage((p) => p + 1)}
-              >
-                Next →
-              </button>
-            </div>
-          )}
-        </>
-      )}
-    </div>
-  );
-}

frontend/src/components/annotations/AddAnnotationForm.tsx

@@ -0,0 +1,120 @@
+import React, { useState } from "react";
+import { useAnnotations } from "@/context/AnnotationsContext";
+
+interface AddAnnotationFormProps {
+  bookId: string;
+  page: number;
+  locationText?: string;
+  onClose?: () => void;
+}
+
+export function AddAnnotationForm({
+  bookId,
+  page,
+  locationText,
+  onClose,
+}: AddAnnotationFormProps): React.ReactElement {
+  const { addBookmark, addNote } = useAnnotations();
+  const [mode, setMode] = useState<"bookmark" | "note" | null>(null);
+  const [noteContent, setNoteContent] = useState("");
+  const [submitting, setSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleSubmit = async (): Promise<void> => {
+    setSubmitting(true);
+    setError(null);
+    try {
+      if (mode === "bookmark") {
+        await addBookmark({ book: bookId, page, location_text: locationText });
+      } else if (mode === "note") {
+        if (!noteContent.trim()) {
+          setError("Note content cannot be empty.");
+          setSubmitting(false);
+          return;
+        }
+        await addNote({
+          book: bookId,
+          page,
+          location_text: locationText,
+          content: noteContent.trim(),
+        });
+      }
+      onClose?.();
+    } catch (err) {
+      setError(
+        err instanceof Error ? err.message : "Failed to save annotation."
+      );
+    } finally {
+      setSubmitting(false);
+    }
+  };
+
+  return (
+    <div className="add-annotation-overlay">
+      <div className="add-annotation-modal">
+        <button className="modal-close" onClick={onClose} aria-label="Close">
+          &times;
+        </button>
+        <h3>Add to Page {page}</h3>
+        {locationText && (
+          <blockquote className="annotation-quote">
+            &ldquo;{locationText}&rdquo;
+          </blockquote>
+        )}
+
+        {!mode ? (
+          <div className="mode-selector">
+            <button
+              className="btn btn-block"
+              onClick={() => setMode("bookmark")}
+            >
+              Add Bookmark
+            </button>
+            <button
+              className="btn btn-block btn-secondary"
+              onClick={() => setMode("note")}
+            >
+              Add Note
+            </button>
+          </div>
+        ) : (
+          <div className="annotation-form">
+            {mode === "note" && (
+              <div className="form-group">
+                <label htmlFor="note-content">Note:</label>
+                <textarea
+                  id="note-content"
+                  className="form-textarea"
+                  value={noteContent}
+                  onChange={(e: React.ChangeEvent<HTMLTextAreaElement>) =>
+                    setNoteContent(e.target.value)
+                  }
+                  rows={5}
+                  placeholder="Write your note here..."
+                  autoFocus
+                />
+              </div>
+            )}
+            {error && <div className="form-error">{error}</div>}
+            <div className="form-actions">
+              <button
+                className="btn"
+                onClick={handleSubmit}
+                disabled={submitting}
+              >
+                {submitting ? "Saving..." : "Save"}
+              </button>
+              <button
+                className="btn btn-secondary"
+                onClick={() => setMode(null)}
+                disabled={submitting}
+              >
+                Back
+              </button>
+            </div>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

frontend/src/components/annotations/AnnotationsDashboard.tsx

@@ -0,0 +1,109 @@
+import React from "react";
+import { useAnnotations } from "@/context/AnnotationsContext";
+import type { AnnotationEntry } from "@/types";
+
+interface AnnotationsDashboardProps {
+  bookId?: string;
+  onNavigateToPage?: (bookId: string, page: number) => void;
+}
+
+export function AnnotationsDashboard({
+  bookId,
+  onNavigateToPage,
+}: AnnotationsDashboardProps): React.ReactElement {
+  const {
+    mergedAnnotations,
+    loadBookmarks,
+    loadNotes,
+    removeBookmark,
+    removeNote,
+    state,
+  } = useAnnotations();
+
+  React.useEffect(() => {
+    loadBookmarks(bookId);
+    loadNotes(bookId);
+  }, [loadBookmarks, loadNotes, bookId]);
+
+  const handleDelete = async (entry: AnnotationEntry): Promise<void> => {
+    if (entry.kind === "bookmark") {
+      await removeBookmark(entry.id);
+    } else {
+      await removeNote(entry.id);
+    }
+  };
+
+  if (state.bookmarksLoading || state.notesLoading) {
+    return <div className="annotations-loading">Loading annotations...</div>;
+  }
+
+  if (mergedAnnotations.length === 0) {
+    return (
+      <div className="annotations-empty">
+        No bookmarks or notes yet.
+      </div>
+    );
+  }
+
+  return (
+    <div className="annotations-dashboard">
+      <div className="annotations-summary">
+        <span className="summary-count">
+          {state.bookmarks.length} bookmarks
+        </span>
+        <span className="summary-separator">&middot;</span>
+        <span className="summary-count">
+          {state.notes.length} notes
+        </span>
+      </div>
+      <div className="annotations-list">
+        {mergedAnnotations.map((entry: AnnotationEntry) => (
+          <div key={`${entry.kind}-${entry.id}`} className="annotation-card">
+            <div className="annotation-card-header">
+              <span
+                className={`annotation-kind-badge ${
+                  entry.kind === "bookmark" ? "bookmark-badge" : "note-badge"
+                }`}
+              >
+                {entry.kind === "bookmark" ? "Bookmark" : "Note"}
+              </span>
+              <span className="annotation-book-title">
+                {entry.book_title}
+              </span>
+              <span className="annotation-page">p.{entry.page}</span>
+              <span className="annotation-date">
+                {new Date(entry.created_at).toLocaleDateString()}
+              </span>
+            </div>
+            {entry.location_text && (
+              <blockquote className="annotation-quote">
+                &ldquo;{entry.location_text}&rdquo;
+              </blockquote>
+            )}
+            {entry.kind === "note" && entry.content && (
+              <p className="note-content-text">{entry.content}</p>
+            )}
+            <div className="annotation-actions">
+              {onNavigateToPage && (
+                <button
+                  className="btn btn-sm"
+                  onClick={() =>
+                    onNavigateToPage(entry.book_id, entry.page)
+                  }
+                >
+                  Go to page
+                </button>
+              )}
+              <button
+                className="btn btn-sm btn-danger"
+                onClick={() => handleDelete(entry)}
+              >
+                Delete
+              </button>
+            </div>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

frontend/src/components/annotations/BookmarkList.tsx

@@ -0,0 +1,87 @@
+import React, { useState } from "react";
+import { useAnnotations } from "@/context/AnnotationsContext";
+import type { Bookmark } from "@/types";
+
+interface BookmarkListProps {
+  bookId?: string;
+  onNavigateToPage?: (bookId: string, page: number) => void;
+}
+
+export function BookmarkList({
+  bookId,
+  onNavigateToPage,
+}: BookmarkListProps): React.ReactElement {
+  const { state, loadBookmarks, removeBookmark } = useAnnotations();
+  const [deletingId, setDeletingId] = useState<string | null>(null);
+
+  React.useEffect(() => {
+    loadBookmarks(bookId);
+  }, [loadBookmarks, bookId]);
+
+  const handleDelete = async (id: string): Promise<void> => {
+    setDeletingId(id);
+    try {
+      await removeBookmark(id);
+    } catch {
+      // error handled by context
+    } finally {
+      setDeletingId(null);
+    }
+  };
+
+  if (state.bookmarksLoading) {
+    return <div className="annotations-loading">Loading bookmarks...</div>;
+  }
+
+  if (state.bookmarks.length === 0) {
+    return (
+      <div className="annotations-empty">
+        No bookmarks yet. Select a passage and add a bookmark while reading.
+      </div>
+    );
+  }
+
+  return (
+    <div className="annotations-list">
+      {state.bookmarks.map((bookmark: Bookmark) => (
+        <div key={bookmark.id} className="annotation-card">
+          <div className="annotation-card-header">
+            <span className="annotation-kind-badge bookmark-badge">
+              Bookmark
+            </span>
+            <span className="annotation-page">
+              Page {bookmark.page}
+            </span>
+            <span className="annotation-date">
+              {new Date(bookmark.created_at).toLocaleDateString()}
+            </span>
+          </div>
+          {bookmark.location_text && (
+            <blockquote className="annotation-quote">
+              &ldquo;{bookmark.location_text}&rdquo;
+            </blockquote>
+          )}
+          <div className="annotation-actions">
+            {onNavigateToPage && (
+              <button
+                className="btn btn-sm"
+                onClick={() =>
+                  onNavigateToPage(bookmark.book, bookmark.page)
+                }
+              >
+                Go to page
+              </button>
+            )}
+            <button
+              className="btn btn-sm btn-danger"
+              onClick={() => handleDelete(bookmark.id)}
+              disabled={deletingId === bookmark.id}
+            >
+              {deletingId === bookmark.id ? "Deleting..." : "Delete"}
+            </button>
+          </div>
+        </div>
+      ))}
+    </div>
+  );
+}

frontend/src/components/annotations/BookmarksNotesPage.tsx

@@ -0,0 +1,23 @@
+import React from "react";
+import { AnnotationsDashboard } from "@/components/annotations";
+
+interface BookmarksNotesPageProps {
+  bookId?: string;
+}
+
+export function BookmarksNotesPage({
+  bookId,
+}: BookmarksNotesPageProps): React.ReactElement {
+  return (
+    <div className="page">
+      <h2>Bookmarks & Notes</h2>
+      <AnnotationsDashboard
+        bookId={bookId}
+        onNavigateToPage={(bookId, page) => {
+          // Navigate to the book reader page at the specific page
+          window.location.href = `/books/${bookId}?page=${page}`;
+        }}
+      />
+    </div>
+  );
+}

frontend/src/components/annotations/NoteList.tsx

@@ -0,0 +1,148 @@
+import React, { useState } from "react";
+import { useAnnotations } from "@/context/AnnotationsContext";
+import type { Note } from "@/types";
+
+interface NoteListProps {
+  bookId?: string;
+  onNavigateToPage?: (bookId: string, page: number) => void;
+}
+
+export function NoteList({
+  bookId,
+  onNavigateToPage,
+}: NoteListProps): React.ReactElement {
+  const { state, loadNotes, editNote, removeNote } = useAnnotations();
+  const [editingId, setEditingId] = useState<string | null>(null);
+  const [editContent, setEditContent] = useState<string>("");
+  const [deletingId, setDeletingId] = useState<string | null>(null);
+  const [savingId, setSavingId] = useState<string | null>(null);
+
+  React.useEffect(() => {
+    loadNotes(bookId);
+  }, [loadNotes, bookId]);
+
+  const handleEdit = (note: Note): void => {
+    setEditingId(note.id);
+    setEditContent(note.content);
+  };
+
+  const handleSave = async (id: string): Promise<void> => {
+    setSavingId(id);
+    try {
+      await editNote(id, editContent.trim());
+      setEditingId(null);
+    } catch {
+      // error handled by context
+    } finally {
+      setSavingId(null);
+    }
+  };
+
+  const handleCancelEdit = (): void => {
+    setEditingId(null);
+    setEditContent("");
+  };
+
+  const handleDelete = async (id: string): Promise<void> => {
+    setDeletingId(id);
+    try {
+      await removeNote(id);
+    } catch {
+      // error handled by context
+    } finally {
+      setDeletingId(null);
+    }
+  };
+
+  if (state.notesLoading) {
+    return <div className="annotations-loading">Loading notes...</div>;
+  }
+
+  if (state.notes.length === 0) {
+    return (
+      <div className="annotations-empty">
+        No notes yet. Select a passage and add a note while reading.
+      </div>
+    );
+  }
+
+  return (
+    <div className="annotations-list">
+      {state.notes.map((note: Note) => (
+        <div key={note.id} className="annotation-card">
+          <div className="annotation-card-header">
+            <span className="annotation-kind-badge note-badge">Note</span>
+            <span className="annotation-page">Page {note.page}</span>
+            <span className="annotation-date">
+              {new Date(note.created_at).toLocaleDateString()}
+            </span>
+          </div>
+          {note.location_text && (
+            <blockquote className="annotation-quote">
+              &ldquo;{note.location_text}&rdquo;
+            </blockquote>
+          )}
+          <div className="annotation-note-content">
+            {editingId === note.id ? (
+              <div className="note-edit-form">
+                <textarea
+                  className="note-edit-textarea"
+                  value={editContent}
+                  onChange={(e: React.ChangeEvent<HTMLTextAreaElement>) =>
+                    setEditContent(e.target.value)
+                  }
+                  rows={4}
+                  autoFocus
+                />
+                <div className="note-edit-actions">
+                  <button
+                    className="btn btn-sm"
+                    onClick={() => handleSave(note.id)}
+                    disabled={savingId === note.id || !editContent.trim()}
+                  >
+                    {savingId === note.id ? "Saving..." : "Save"}
+                  </button>
+                  <button
+                    className="btn btn-sm btn-secondary"
+                    onClick={handleCancelEdit}
+                  >
+                    Cancel
+                  </button>
+                </div>
+              </div>
+            ) : (
+              <p className="note-content-text">{note.content}</p>
+            )}
+          </div>
+          <div className="annotation-actions">
+            {onNavigateToPage && (
+              <button
+                className="btn btn-sm"
+                onClick={() =>
+                  onNavigateToPage(note.book, note.page)
+                }
+              >
+                Go to page
+              </button>
+            )}
+            {editingId !== note.id && (
+              <button
+                className="btn btn-sm btn-secondary"
+                onClick={() => handleEdit(note)}
+              >
+                Edit
+              </button>
+            )}
+            <button
+              className="btn btn-sm btn-danger"
+              onClick={() => handleDelete(note.id)}
+              disabled={deletingId === note.id}
+            >
+              {deletingId === note.id ? "Deleting..." : "Delete"}
+            </button>
+          </div>
+        </div>
+      ))}
+    </div>
+  );
+}

frontend/src/components/annotations/index.ts

@@ -0,0 +1,4 @@
+export { BookmarkList } from "./BookmarkList";
+export { NoteList } from "./NoteList";
+export { AddAnnotationForm } from "./AddAnnotationForm";
+export { AnnotationsDashboard } from "./AnnotationsDashboard";

frontend/src/components/layout/Layout.tsx

@@ -0,0 +1,27 @@
+import React from "react";
+import { AnnotationsProvider } from "@/context/AnnotationsContext";
+
+interface LayoutProps {
+  children: React.ReactNode;
+  title?: string;
+}
+
+export function Layout({
+  children,
+  title = "Cloud Reader",
+}: LayoutProps): React.ReactElement {
+  return (
+    <AnnotationsProvider>
+      <div className="app-container">
+        <header className="app-header">
+          <h1 className="app-title">{title}</h1>
+          <nav className="app-nav">
+            <a href="/" className="nav-link">Home</a>
+            <a href="/bookmarks-notes" className="nav-link">Bookmarks & Notes</a>
+          </nav>
+        </header>
+        <main className="app-main">{children}</main>
+      </div>
+    </AnnotationsProvider>
+  );
+}