Merge pull request 'feat: implement mobile reader' (#27) from feat-mobile-reader into main

Reviewed-on: #27

.env.example

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

.gitignore

@@ -1,34 +1,40 @@
-# Python
+node_modules
-__pycache__/
+dist
-*.py[cod]
+frontend/dist
-*.egg-info/
+frontend/dist/assets
-dist/
+frontend/dist/assets/index.html
-*.egg
+frontend/dist/assets/index.html.gz
-.venv/
+frontend/dist/assets/index.html.br
-venv/
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+frontend/dist/assets/index.html.br
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+frontend/dist/assets/index.html.br
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+frontend/dist/assets/index.html.br
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+frontend/dist/assets/index.html.br
+frontend/dist/assets/index.html.brotli
+frontend/dist/assets/index.html.gzip
+mobile/dist
+backend/media
+backend/staticfiles
+backend/media
+backend/staticfiles
+.pycache__
+__pycache__
+*.pyc
+*.pyo
+*.pyd
+*.db
 *.sqlite3
-
+*.log
-# Node
+*.env
-node_modules/
+*.DS_Store
-dist/
+*.vscode
-build/
+*.idea
-.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/

AGENTS.md

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

README.md

@@ -0,0 +1,93 @@
+# Cloud Reader
+
+A full-stack e-book reader application with cross-device sync. Upload EPUB/PDF files, track reading progress, bookmark passages, take notes, and customize your reading experience.
+
+## Architecture
+
+```
+cloud-reader/
+├── backend/         # Django REST API (canonical backend)
+│   ├── config/      # Django project settings
+│   ├── apps/
+│   │   ├── users/       # User auth (JWT)
+│   │   ├── books/       # Books, e-books, reading progress, settings
+│   │   └── annotations/ # Bookmarks and notes
+│   ├── manage.py
+│   └── requirements.txt
+├── frontend/        # React + Vite + TypeScript (web frontend)
+│   ├── src/
+│   │   ├── api/         # API client (axios with JWT refresh)
+│   │   ├── components/  # Reusable components
+│   │   ├── context/     # Auth and annotations context
+│   │   ├── hooks/       # Custom hooks
+│   │   ├── pages/       # Route pages (Library, Reader, AddBook, Auth, Settings)
+│   │   └── types/       # TypeScript type definitions
+│   └── package.json
+├── mobile/          # Expo React Native app (mobile frontend)
+│   ├── src/
+│   │   ├── api/         # API client (axios with JWT refresh via AsyncStorage)
+│   │   ├── components/  # Reusable UI components
+│   │   ├── context/     # Auth context
+│   │   ├── hooks/       # Custom hooks
+│   │   ├── navigation/  # React Navigation (Auth stack + Main tabs)
+│   │   ├── screens/     # Screen-level components (Login, Library, etc.)
+│   │   └── types/       # Mobile-specific types
+│   ├── App.tsx
+│   └── app.json
+├── packages/
+│   └── shared/       # @cloud-reader/shared — domain types & utilities
+│       └── src/
+│           ├── types.ts   # Shared domain types (Book, User, Bookmark, Note, etc.)
+│           └── utils.ts   # Date formatting, validation, API endpoint constants
+├── package.json      # Root — yarn workspaces config
+└── docker-compose.yml
+```
+
+## Quick Start
+
+### Docker (recommended)
+```bash
+cp env.example .env
+```
+```bash
+docker compose up --build
+```
+- **Frontend:** http://localhost:5173
+- **Backend API:** http://localhost:8000/api/
+
+### Backend (standalone)
+```bash
+cd backend
+pip install -r requirements.txt
+python manage.py migrate
+python manage.py runserver
+```
+
+### Frontend (standalone)
+```bash
+cd frontend
+yarn install
+yarn dev
+```
+
+### Mobile (Expo)
+```bash
+# From monorepo root — installs all workspaces including mobile
+yarn install
+
+# Start Expo dev server
+yarn workspace @cloud-reader/mobile start
+
+# Or cd into mobile and run directly
+cd mobile
+npx expo start
+```
+
+> The mobile app requires the backend to be running. Set `EXPO_PUBLIC_API_URL` environment variable in your shell or `.env` file to point to the backend (defaults to `http://10.0.2.2:8000` for Android emulator).
+
+## Migration Notes
+Consolidated from duplicate `api/` + `web/` into single `backend/` + `frontend/` canonical structure.
+- `backend/` kept as canonical; `api/` features (e-book uploads, reading progress, reading settings) merged in.
+- `frontend/` kept as canonical; `web/` pages (Library, Reader, AddBook, Auth, Settings) merged in.
+- `api/` and `web/` directories removed.
+- `mobile/` added as Expo React Native app with shared `@cloud-reader/shared` package.

backend/.env.example

@@ -0,0 +1,16 @@
+# 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
+
+# Open Library metadata enrichment (optional)
+OPENLIBRARY_ENABLED=true
+OPENLIBRARY_PREFERRED_LANG=es
+OPENLIBRARY_FALLBACK_LANG=en
+OPENLIBRARY_TIMEOUT_SECONDS=10
+OPENLIBRARY_CONNECT_TIMEOUT_SECONDS=15
+OPENLIBRARY_USER_AGENT=CloudReader/1.0

backend/.python-version

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

backend/Dockerfile

@@ -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 requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . ./
+
+RUN mkdir -p media
+
+EXPOSE 8000
+
+CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]

backend/apps/annotations/admin.py

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

backend/apps/annotations/apps.py

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

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

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

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

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

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

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

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

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

backend/apps/annotations/models.py

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

backend/apps/annotations/permissions.py

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

backend/apps/annotations/serializers.py

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

backend/apps/annotations/tests.py

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

backend/apps/annotations/urls.py

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

backend/apps/annotations/views.py

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

backend/apps/books/admin.py

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

backend/apps/books/apps.py

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

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

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

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

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

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

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

backend/apps/books/models.py

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

backend/apps/books/serializers.py

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

backend/apps/books/services/ebook_metadata.py

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

backend/apps/books/services/metadata.py

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

backend/apps/books/services/openlibrary.py

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

backend/apps/books/services/process_ebook.py

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

backend/apps/books/tests.py

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

backend/apps/books/urls.py

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

backend/apps/books/views.py

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

backend/apps/reader/apps.py

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

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

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

backend/apps/reader/models.py

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

backend/apps/reader/serializers.py

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

backend/apps/reader/urls.py

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

backend/apps/reader/views.py

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

backend/apps/users/admin.py

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

backend/apps/users/apps.py

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

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

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

backend/apps/users/models.py

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

backend/apps/users/serializers.py

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

backend/apps/users/urls.py

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

backend/apps/users/views.py

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

backend/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/urls.py

@@ -1,13 +0,0 @@
-from __future__ import annotations
-
-from django.urls import include, path
-from rest_framework.routers import DefaultRouter
-
-from books.views import BookViewSet
-
-router = DefaultRouter()
-router.register(r"books", BookViewSet, basename="book")
-
-urlpatterns = [
-    path("", include(router.urls)),
-]

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

backend/config/settings.py

@@ -1,99 +1,47 @@
-"""
+from pydantic_settings import BaseSettings
-Django settings for config project.
 
-Generated by 'django-admin startproject' using Django 6.0.5.
-"""
 
-from pathlib import Path
+class Settings(BaseSettings):
+    """Application settings via pydantic-settings. Reads from env vars and .env."""
 
-from config.settings_app import settings
+    # Django
+    DJANGO_SECRET_KEY: str = "django-insecure-change-me-in-production"
+    DJANGO_DEBUG: bool = False
+    DJANGO_ALLOWED_HOSTS: list[str] = ["*"]
 
-BASE_DIR = Path(__file__).resolve().parent.parent
+    # PostgreSQL
+    DB_NAME: str = "cloud_reader"
+    DB_USER: str = "postgres"
+    DB_PASSWORD: str = "postgres"
+    DB_HOST: str = "localhost"
+    DB_PORT: int = 5432
 
-SECRET_KEY = settings.SECRET_KEY
+    # JWT
-DEBUG = settings.DEBUG
+    JWT_ACCESS_TOKEN_LIFETIME_MINUTES: int = 60
-ALLOWED_HOSTS = settings.ALLOWED_HOSTS
+    JWT_REFRESH_TOKEN_LIFETIME_DAYS: int = 7
 
-INSTALLED_APPS = [
+    # CORS
-    "django.contrib.admin",
+    CORS_ALLOWED_ORIGINS: list[str] = [
-    "django.contrib.auth",
+        "http://localhost:5173",
-    "django.contrib.contenttypes",
+        "http://localhost:3000",
-    "django.contrib.sessions",
+    ]
-    "django.contrib.messages",
-    "django.contrib.staticfiles",
-    # Third-party
-    "rest_framework",
-    "corsheaders",
-    # Local apps
-    "books",
-]
 
-MIDDLEWARE = [
+    # Open Library metadata enrichment
-    "corsheaders.middleware.CorsMiddleware",
+    OPENLIBRARY_ENABLED: bool = True
-    "django.middleware.security.SecurityMiddleware",
+    OPENLIBRARY_PREFERRED_LANG: str = "es"
-    "django.contrib.sessions.middleware.SessionMiddleware",
+    OPENLIBRARY_FALLBACK_LANG: str = "en"
-    "django.middleware.common.CommonMiddleware",
+    OPENLIBRARY_TIMEOUT_SECONDS: float = 10.0
-    "django.middleware.csrf.CsrfViewMiddleware",
+    OPENLIBRARY_CONNECT_TIMEOUT_SECONDS: float = 15.0
-    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    OPENLIBRARY_USER_AGENT: str = "CloudReader/1.0 (https://github.com/cloud-reader)"
-    "django.contrib.messages.middleware.MessageMiddleware",
-    "django.middleware.clickjacking.XFrameOptionsMiddleware",
-]
 
-ROOT_URLCONF = "config.urls"
+    @property
+    def DATABASE_URL(self) -> str:
+        return (
+            f"postgresql://{self.DB_USER}:{self.DB_PASSWORD}"
+            f"@{self.DB_HOST}:{self.DB_PORT}/{self.DB_NAME}"
+        )
 
-TEMPLATES = [
+    model_config = {"env_file": ".env", "env_file_encoding": "utf-8"}
-    {
-        "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 = {
+settings = Settings()
-    "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_ALLOW_CREDENTIALS = settings.CORS_ALLOW_CREDENTIALS
-
-# REST Framework
-REST_FRAMEWORK = {
-    "DEFAULT_AUTHENTICATION_CLASSES": [
-        "rest_framework.authentication.SessionAuthentication",
-        "rest_framework.authentication.BasicAuthentication",
-    ],
-    "DEFAULT_PERMISSION_CLASSES": [
-        "rest_framework.permissions.IsAuthenticatedOrReadOnly",
-    ],
-    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.PageNumberPagination",
-    "PAGE_SIZE": 20,
-}

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

@@ -1,8 +1,16 @@
+from django.conf import settings
 from django.contrib import admin
 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")),
 ]
+
+if settings.DEBUG:
+    from django.conf.urls.static import static
+
+    urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

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/pyproject.toml

@@ -0,0 +1,25 @@
+[project]
+name = "backend"
+version = "0.1.0"
+requires-python = ">=3.12"
+dependencies = [
+    "coverage==7.6.10",
+    "django==5.1.7",
+    "django-cors-headers==4.6.0",
+    "django-filter==25.1",
+    "djangorestframework==3.15.2",
+    "djangorestframework-simplejwt==5.4.0",
+    "gunicorn==23.0.0",
+    "pillow>=11.0.0",
+    "psycopg2-binary==2.9.10",
+    "pydantic==2.10.5",
+    "pydantic-settings==2.7.1",
+    "pytest==8.3.4",
+    "pytest-cov==6.0.0",
+    "pytest-django==4.9.0",
+    "python-dotenv==1.0.1",
+    "httpx>=0.28.0",
+    "ebooklib>=0.18",
+    "beautifulsoup4>=4.12.0",
+    "pypdf>=5.0.0",
+]

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 +1,15 @@
-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
+Pillow>=11.0.0
+pytest==8.3.4
+pytest-django==4.9.0
+pytest-cov==6.0.0
+coverage==7.6.10

backend/uv.lock

@@ -0,0 +1,673 @@
+version = 1
+revision = 3
+requires-python = ">=3.12"
+
+[[package]]
+name = "annotated-types"
+version = "0.7.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/ee/67/531ea369ba64dcff5ec9c3402f9f51bf748cec26dde048a2f973a4eea7f5/annotated_types-0.7.0.tar.gz", hash = "sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89", size = 16081, upload-time = "2024-05-20T21:33:25.928Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/78/b6/6307fbef88d9b5ee7421e68d78a9f162e0da4900bc5f5793f6d3d0e34fb8/annotated_types-0.7.0-py3-none-any.whl", hash = "sha256:1f02e8b43a8fbbc3f3e0d4f0f4bfc8131bcb4eebe8849b8e5c773f3a1c582a53", size = 13643, upload-time = "2024-05-20T21:33:24.1Z" },
+]
+
+[[package]]
+name = "anyio"
+version = "4.13.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "idna" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/19/14/2c5dd9f512b66549ae92767a9c7b330ae88e1932ca57876909410251fe13/anyio-4.13.0.tar.gz", hash = "sha256:334b70e641fd2221c1505b3890c69882fe4a2df910cba14d97019b90b24439dc", size = 231622, upload-time = "2026-03-24T12:59:09.671Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/da/42/e921fccf5015463e32a3cf6ee7f980a6ed0f395ceeaa45060b61d86486c2/anyio-4.13.0-py3-none-any.whl", hash = "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708", size = 114353, upload-time = "2026-03-24T12:59:08.246Z" },
+]
+
+[[package]]
+name = "asgiref"
+version = "3.11.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/63/40/f03da1264ae8f7cfdbf9146542e5e7e8100a4c66ab48e791df9a03d3f6c0/asgiref-3.11.1.tar.gz", hash = "sha256:5f184dc43b7e763efe848065441eac62229c9f7b0475f41f80e207a114eda4ce", size = 38550, upload-time = "2026-02-03T13:30:14.33Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/5c/0a/a72d10ed65068e115044937873362e6e32fab1b7dce0046aeb224682c989/asgiref-3.11.1-py3-none-any.whl", hash = "sha256:e8667a091e69529631969fd45dc268fa79b99c92c5fcdda727757e52146ec133", size = 24345, upload-time = "2026-02-03T13:30:13.039Z" },
+]
+
+[[package]]
+name = "backend"
+version = "0.1.0"
+source = { virtual = "." }
+dependencies = [
+    { name = "beautifulsoup4" },
+    { name = "coverage" },
+    { name = "django" },
+    { name = "django-cors-headers" },
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docker-compose.yml

@@ -0,0 +1,57 @@
+services:
+  db:
+    image: postgres:15
+    restart: unless-stopped
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB:-cloud_reader}
+      POSTGRES_USER: ${POSTGRES_USER:-postgres}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres -d cloud_reader"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    ports:
+      - "8000:8000"
+    environment:
+      DJANGO_SECRET_KEY: ${DJANGO_SECRET_KEY}
+      DJANGO_DEBUG: ${DJANGO_DEBUG:-True}
+      DB_NAME: ${POSTGRES_DB:-cloud_reader}
+      DB_USER: ${POSTGRES_USER:-postgres}
+      DB_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
+      DB_HOST: ${DB_HOST:-db}
+      DB_PORT: ${DB_PORT:-5432}
+    volumes:
+      - ./backend:/app
+      - ./backend/media:/app/media
+    command: >
+      sh -c "python manage.py migrate && python manage.py runserver 0.0.0.0:8000"
+    depends_on:
+      db:
+        condition: service_healthy
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    ports:
+      - "5173:5173"
+    environment:
+      VITE_API_URL: ${VITE_API_URL:-http://localhost:8000}
+    volumes:
+      - ./frontend:/app
+      - /app/node_modules
+    depends_on:
+      - backend
+
+volumes:
+  postgres_data:

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

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

docs/backend/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/backend/search-discovery-spec.md

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

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

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

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

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

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

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

docs/frontend/013-i18n-web.md

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

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

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

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

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

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

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

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

docs/frontend/mobile-search-spec.md

@@ -0,0 +1,99 @@
+# Mobile Book Search & Discovery — Spec
+
+## Overview
+Enhance the existing book search experience with mobile-first features: voice search via the Web Speech API, real-time autocomplete suggestions, and touch-optimized responsive layout.
+
+## Prerequisites
+- Backend endpoints already exist (from `docs/backend/search-discovery-spec.md`):
+  - `GET /api/books/?q=...&genre=...&author=...&reading_status=...` — paginated search
+  - `GET /api/books/{id}/` — book detail
+  - `GET /api/books/genres/` — genre discovery
+  - `GET /api/books/authors/` — author discovery
+- Frontend `LibraryPage` and `BookDetailPage` components exist but lacked API client methods and types (fixed in this PR).
+
+## Frontend API Client Additions
+
+### `frontend/src/types/book.ts` — New exports
+
+```typescript
+export interface BookSearchParams {
+  q?: string;
+  genre?: string;
+  author?: string;
+  reading_status?: string;
+  ordering?: string;
+  page?: number;
+  page_size?: number;
+}
+
+export const READING_STATUS_OPTIONS: { value: string; label: string }[] = [
+  { value: "", label: "All Statuses" },
+  { value: "want_to_read", label: "Want to Read" },
+  { value: "reading", label: "Reading" },
+  { value: "finished", label: "Finished" },
+  { value: "dnf", label: "Did Not Finish" },
+];
+```
+
+### `frontend/src/api/books.ts` — New methods on `booksApi`
+
+| Method | Endpoint | Returns |
+|--------|----------|---------|
+| `searchBooks(params)` | `GET /api/books/` | `{ count, results: BookListItem[] }` |
+| `getBook(id)` | `GET /api/books/{id}/` | `BookDetail` |
+| `getGenres()` | `GET /api/books/genres/` | `string[]` |
+| `getAuthors()` | `GET /api/books/authors/` | `string[]` |
+
+## Mobile Features
+
+### 1. Voice Search
+- **Hook**: `useVoiceSearch` in `frontend/src/hooks/useVoiceSearch.ts`
+- Uses the Web Speech API (`SpeechRecognition` / `webkitSpeechRecognition`)
+- Returns: `{ isListening, transcript, isSupported, startListening, stopListening, hasError }`
+- Renders a microphone icon button next to the search input
+- On mobile, tapping the mic icon triggers the native speech recognition prompt
+- On success, populates the search input with the transcript and triggers a search
+- Graceful degradation: if SpeechRecognition API is unavailable, the mic button is hidden
+
+### 2. Real-Time Suggestions (Autocomplete)
+- Component: `SearchSuggestions` rendered as a dropdown below the search input
+- On each keystroke (debounced 200ms), fetches `GET /api/books/?q=...&page_size=5` for suggestions
+- Shows up to 5 book title/author suggestions in a styled dropdown list
+- Clicking a suggestion navigates directly to `/books/{id}`
+- Clicking outside or pressing Escape dismisses the dropdown
+- Combines with existing full search results — suggestions are fast previews, not the main result list
+
+### 3. Mobile-Responsive Enhancements
+- Filters panel is **collapsed by default** on mobile, toggleable via a "Filters" button
+- Touch targets minimum 44px (WCAG 2.1)
+- Results grid switches to **single column** below 600px viewport width
+- Search input and filters panel stack vertically on small screens
+- Add CSS breakpoints via inline styles and a `useMediaQuery` hook
+- Bottom navigation-style action buttons on mobile (Add Book, Bookmarks, Settings become icon-only)
+
+## Component Hierarchy
+
+```
+LibraryPage
+├── Header (title, count, action buttons)
+├── SearchInput
+│   ├── TextInput (debounced 300ms)
+│   ├── VoiceSearchButton (microphone icon)
+│   └── SearchSuggestions (dropdown, debounced 200ms)
+├── FiltersButton (mobile: toggle; desktop: always visible)
+├── FiltersPanel (collapsible on mobile)
+│   ├── GenreSelect
+│   ├── AuthorSelect
+│   ├── StatusSelect
+│   └── ClearFiltersButton
+├── LoadingState (skeleton grid)
+├── ErrorState (message + retry button)
+├── EmptyState (no results / no books)
+└── ResultsGrid (responsive: auto-fill vs single column)
+```
+
+## Mobile-First CSS Strategy
+- Use inline styles with `@media` queries in a shared `breakpoints.ts` utility
+- Breakpoints: sm = 480px, md = 768px, lg = 1024px
+- Base styles are mobile-first (single column, full width)
+- Media queries expand to multi-column grid and horizontal layout on larger screens

docs/mobile/009-expo-integration.md

@@ -0,0 +1,96 @@
+# 009 — Expo Mobile Application Integration
+
+**Issue:** #16
+**Status:** Draft
+**Created:** 2026-05-29
+
+## Objective
+
+Integrate an Expo-based React Native mobile application into the `cloud-reader` monorepo, sharing types, API client patterns, and configuration with the existing web frontend.
+
+## Directory Structure
+
+```
+cloud-reader/
+├── mobile/                    # Expo React Native app
+│   ├── package.json
+│   ├── app.json
+│   ├── tsconfig.json
+│   ├── babel.config.js
+│   ├── App.tsx               # Root component
+│   ├── src/
+│   │   ├── api/              # API client (mirrors frontend/src/api/ pattern)
+│   │   │   ├── client.ts     # Axios instance + JWT interceptor
+│   │   │   ├── books.ts      # Book API calls
+│   │   │   └── annotations.ts
+│   │   ├── screens/          # Screen-level components
+│   │   ├── components/       # Reusable UI components
+│   │   ├── navigation/       # React Navigation setup
+│   │   ├── context/          # Auth context, etc.
+│   │   ├── hooks/            # Custom hooks
+│   │   └── types/            # Mobile-specific types
+│   └── assets/
+├── packages/
+│   └── shared/
+│       ├── package.json
+│       ├── tsconfig.json
+│       └── src/
+│           ├── types.ts      # Shared domain types (Book, User, Bookmark, Note)
+│           └── utils.ts      # Shared utility functions
+└── package.json              # Root — updated workspace config
+```
+
+## Monorepo Workspace Config
+
+Root `package.json` workspaces array updated to include `"mobile"`, `"packages/shared"` alongside existing `"frontend"` and `"backend"`.
+
+## Shared `packages/shared`
+
+- `@cloud-reader/shared` package published within the monorepo
+- Exports:
+  - All domain types (`Book`, `BookSummary`, `Bookmark`, `Note`, `User`, `AnnotationEntry`, `PaginatedResponse`, `TokenResponse`)
+  - API endpoint constants
+  - Date formatting helpers
+  - Validation utilities (email regex, password strength check)
+
+## Mobile App Structure
+
+### API Client (`mobile/src/api/client.ts`)
+- Axios instance configured with:
+  - Base URL from environment variable (`EXPO_PUBLIC_API_URL`)
+  - JWT token attachment via request interceptor
+  - Token refresh response interceptor on 401
+  - Uses `AsyncStorage` for token persistence (instead of `localStorage`)
+
+### Navigation (`mobile/src/navigation/`)
+- React Navigation stack:
+  1. `AuthStack` — Login, Register screens
+  2. `MainTabs` — Library, Search, Settings tabs
+  3. `BookReader` — Full-screen reading view
+
+### Key Screens
+| Screen | Route | Purpose |
+|--------|-------|---------|
+| Login | `Auth/Login` | Email/password login |
+| Register | `Auth/Register` | User registration |
+| Library | `Main/Library` | Book list with filtering |
+| BookDetail | `Main/BookDetail` | Book metadata + actions |
+| Reader | `Reader/View` | EPUB/PDF rendering |
+| Search | `Main/Search` | Book discovery |
+| Settings | `Main/Settings` | Profile, theme, download mgmt |
+
+## Backend Changes Required
+
+None. The existing Django REST API already serves all endpoints needed by the mobile app. The mobile app communicates with the same backend via the shared API base URL.
+
+## Docker
+
+No changes to `docker-compose.yml` needed — the mobile app runs on-device or via Expo Go, not inside Docker.
+
+## CI/CD Considerations
+
+The monorepo structure supports a single pipeline that can:
+- `yarn install` at root (installs all workspaces)
+- `yarn workspace @cloud-reader/shared build`
+- `yarn workspace @cloud-reader/mobile build` (Expo EAS for mobile builds)
+- `yarn workspace @cloud-reader/frontend build` (Vite for web builds)

docs/mobile/010-mobile-reader.md

@@ -0,0 +1,150 @@
+# 010 — Mobile EPUB Reader
+
+**Status:** Implemented
+**Created:** 2026-06-04
+
+## Objective
+
+Mirror the web reading experience (`frontend/src/pages/ReadingPage.tsx` and
+`frontend/src/components/reader/*`) inside the Expo app so users can open their
+uploaded library, read EPUBs with persisted progress and typography settings,
+and manage bookmarks/highlights — reusing the same Django REST API as the web
+client.
+
+The web EPUB renderer (`react-reader` / epub.js) is DOM-only, so mobile renders
+EPUBs with `@epubjs-react-native/core`, which runs epub.js inside a
+`react-native-webview`. This keeps behavior (CFI locations, themes, font
+controls, TOC, annotations) close to web while staying inside the managed Expo
+workflow.
+
+## Scope
+
+### Mirrored from web
+
+- EPUB rendering with swipe pagination (`flow: "paginated"`).
+- Resume position and debounced progress save (CFI + percentage).
+- Table of contents drawer with jump-to-chapter.
+- Reading settings: theme presets (light/sepia/paper/dark), font family, font
+  size, line spacing — persisted to `/api/reader/settings/`.
+- Bookmarks: bookmark the current page, list/jump/delete, and create highlights
+  from a text selection. Highlights are re-applied on open (best-effort).
+
+### Deferred (not in this pass)
+
+- PDF reading. PDF books show a placeholder pointing to the web reader.
+- Brightness and orientation-lock controls.
+- Per-highlight color picker (highlights use a single default color).
+- App-wide internationalization (web uses `react-i18n-lite`).
+
+## Architecture
+
+```
+LibraryScreen (EBook list)
+        |  navigate("BookDetail", { ebookId })
+        v
+BookDetailScreen ----------------> ReaderScreen ({ ebookId })
+                                        |
+                       GET /api/books/ebooks/:id/  (format guard)
+                                        |
+                       epub? --------------------- pdf? -> placeholder
+                          |
+                EpubReaderView (ReaderProvider)
+                          |
+   expo-file-system downloadAsync(file/, Bearer token) -> file:// uri
+                          |
+   <Reader src=file:// fileSystem=useFileSystem flow="paginated" />
+                          |
+   onLocationChange -> debounce 800ms -> PATCH progress/
+   onSelected       -> POST bookmarks/ (+ highlight annotation)
+   useReader().toc  -> goToLocation(href)
+   settings change  -> changeTheme / changeFontSize / changeFontFamily
+                       + PATCH /api/reader/settings/ (debounced)
+```
+
+The ebook file is downloaded to the app cache with an `Authorization` header
+(the `/file/` endpoint is JWT-protected) and the local `file://` URI is handed
+to the renderer — mirroring how the web client downloads a blob rather than
+using a public/signed URL.
+
+## Mobile changes
+
+| File | Role |
+|------|------|
+| `mobile/src/api/client.ts` | Adds `apiClient`, `saveTokens`, `loadTokens`, `getApiBaseUrl` |
+| `mobile/src/api/ebooks.ts` | `/api/books/ebooks/` list/detail/toc + `getFileUrl(id)` |
+| `mobile/src/api/reader.ts` | Reader settings + per-book progress (mirrors web `api/reader.ts`) |
+| `mobile/src/api/annotations.ts` | Bookmarks CRUD against `/api/annotations/bookmarks/` |
+| `mobile/src/types/reader.ts` | `ReadingSettings`, `ReadingProgress` (full reader shapes) |
+| `mobile/src/types/index.ts` | `AppStackParamList`, `Bookmark`, `CreateMarkerPayload` |
+| `mobile/src/hooks/useReadingSettings.ts` | Loads + debounced-saves reader settings |
+| `mobile/src/utils/epubTheme.ts` | Font stacks, theme palettes, `buildEpubTheme()` |
+| `mobile/src/navigation/AppStack.tsx` | Native stack: Tabs / BookDetail / Reader |
+| `mobile/src/screens/LibraryScreen.tsx` | Lists user EBooks (`ebooksApi.list`) |
+| `mobile/src/screens/BookDetailScreen.tsx` | Metadata + start/resume button |
+| `mobile/src/screens/ReaderScreen.tsx` | Format guard: EPUB view vs PDF placeholder |
+| `mobile/src/components/reader/EpubReaderView.tsx` | Reader, progress, bookmarks, settings wiring |
+| `mobile/src/components/reader/ReaderToolbar.tsx` | Title, chapter, progress bar, action buttons |
+| `mobile/src/components/reader/TocModal.tsx` | Table of contents sheet |
+| `mobile/src/components/reader/ReadingSettingsModal.tsx` | Theme/font/size/spacing controls |
+| `mobile/src/components/reader/BookmarksModal.tsx` | Bookmarks & highlights list |
+| `mobile/App.tsx` | Wraps the tree in `GestureHandlerRootView` |
+
+Removed unused scaffolding: `mobile/src/navigation/AppNavigator.tsx`,
+`mobile/src/navigation/MainTabs.tsx`.
+
+## API contracts (consumed)
+
+| Method | Path | Purpose |
+|--------|------|---------|
+| GET | `/api/books/ebooks/` | User library list |
+| GET | `/api/books/ebooks/:id/` | EBook detail (format, progress, cover) |
+| GET | `/api/books/ebooks/:id/file/` | Stream EPUB bytes (JWT, owner) |
+| GET/PATCH | `/api/books/ebooks/:id/progress/` | Reading progress (`current_position`, `last_page`, `epub_location`) |
+| GET/PATCH | `/api/reader/settings/` | Reader typography/theme settings |
+| GET/POST/DELETE | `/api/annotations/bookmarks/` | Bookmarks & highlights (`ebook`, `epub_cfi`, `chapter_index`, ...) |
+
+## Settings mapping (web -> mobile)
+
+| Reader setting | Web (epub.js) | Mobile (`@epubjs-react-native/core`) |
+|----------------|---------------|--------------------------------------|
+| `theme` / colors | `themes.register/select` | `changeTheme(buildEpubTheme())` + `defaultTheme` |
+| `font_size` | `themes.fontSize` | `changeFontSize("Npx")` |
+| `font_family` | body font-family | `changeFontFamily(stack)` |
+| `line_height` | body line-height | `buildEpubTheme()` CSS rule |
+| `margin_width` | gap-based padding | not applied (deferred) |
+| `brightness` / `orientation_lock` | applied on web | deferred |
+
+## Dependencies added
+
+- `@epubjs-react-native/core@1.4.7`
+- `@epubjs-react-native/expo-file-system@1.1.4`
+- `react-native-webview@13.12.5`
+
+(`react-native-gesture-handler`, `react-native-reanimated`, and
+`expo-file-system` were already present.)
+
+## Configuration
+
+| Env var | Purpose |
+|---------|---------|
+| `EXPO_PUBLIC_API_URL` | Backend base URL (e.g. `http://10.0.2.2:8000` on Android emulator, LAN IP on a device) |
+
+## Compatibility notes
+
+- The Expo file-system adapter (`@epubjs-react-native/expo-file-system`) depends
+  only on `expo-file-system`, so the reader runs in Expo Go. (The library's
+  bare adapter pulls native `@dr.pogodin/react-native-fs`; that path is not
+  used here.)
+- React 19 / Expo SDK 52 may surface peer-dependency warnings for the
+  `@epubjs-react-native/*` packages.
+
+## Verification
+
+- [ ] Log in; Library lists the user's uploaded EBooks with covers/progress.
+- [ ] Open an EPUB; it renders and paginates by swipe.
+- [ ] Reopen a book; it resumes at the last position.
+- [ ] Change theme/font/size/spacing; the page updates and persists across reopen.
+- [ ] Open the TOC and jump to a chapter.
+- [ ] Bookmark the current page; it appears in the bookmarks list and can be re-opened/deleted.
+- [ ] Select text to create a highlight; it persists and re-renders on reopen.
+- [ ] Open a PDF book; the placeholder is shown instead of a crash.

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/Dockerfile

@@ -0,0 +1,12 @@
+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY package.json yarn.lock ./
+RUN yarn install --frozen-lockfile
+
+COPY . ./
+
+EXPOSE 5173
+
+CMD ["yarn", "dev", "--host"]

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/dist/assets/AddBook-DiryQGMk.js

@@ -0,0 +1 @@
+import{X as j,h as S,r as d,j as e}from"./index-BQiEVoRj.js";import{b as B}from"./books-BG7wMiRx.js";import{g as v}from"./errors-bLl0IgZb.js";function R(){const{t:o}=j(),s=S(),[a,p]=d.useState(""),[c,b]=d.useState(""),[n,u]=d.useState(null),[r,f]=d.useState(!1),[x,i]=d.useState(null),y=t=>{var g,h;const l=((g=t.target.files)==null?void 0:g[0])??null;if(l){const m=(h=l.name.split(".").pop())==null?void 0:h.toLowerCase();if(m!=="epub"&&m!=="pdf"){i(o("addBook.fileTypeError")),u(null);return}u(l),i(null),a||p(l.name.replace(/\.(epub|pdf)$/i,"").slice(0,512))}},k=async t=>{if(t.preventDefault(),!n||!a.trim()){i(o("addBook.requiredError"));return}f(!0),i(null);try{await B.uploadEBook(n,a.trim(),c.trim()),s("/")}catch(l){i(v(l,o("addBook.uploadFailed")))}finally{f(!1)}};return e.jsxs("div",{style:{maxWidth:500,margin:"0 auto",padding:16,minHeight:"100vh",background:"#f8f9fa"},children:[e.jsxs("header",{style:{display:"flex",alignItems:"center",gap:12,marginBottom:24,padding:"16px 0",borderBottom:"1px solid #eee"},children:[e.jsxs("button",{onClick:()=>s("/"),style:{padding:"8px 16px",borderRadius:6,border:"1px solid #ddd",background:"#fff",cursor:"pointer",fontSize:14},children:["← ",o("common.back")]}),e.jsx("h1",{style:{fontSize:24,fontWeight:700,color:"#1a1a2e",margin:0},children:o("addBook.title")})]}),e.jsxs("form",{onSubmit:k,style:{display:"flex",flexDirection:"column",gap:20},children:[x&&e.jsx("div",{style:{background:"#fde8e8",padding:12,borderRadius:6,color:"#e74c3c",fontSize:14},children:x}),e.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:6},children:[e.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:o("addBook.fileLabel")}),e.jsx("input",{type:"file",accept:".epub,.pdf",onChange:y,style:{padding:"10px 0"}}),n&&e.jsx("p",{style:{fontSize:13,color:"#666",marginTop:4},children:o("addBook.selected",{name:n.name})})]}),e.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:6},children:[e.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:o("addBook.titleLabel")}),e.jsx("input",{type:"text",value:a,onChange:t=>p(t.target.value),placeholder:o("addBook.titlePlaceholder"),style:{padding:"10px 12px",borderRadius:6,border:"1px solid #ddd",fontSize:16,outline:"none"}})]}),e.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:6},children:[e.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:o("addBook.authorLabel")}),e.jsx("input",{type:"text",value:c,onChange:t=>b(t.target.value),placeholder:o("addBook.authorPlaceholder"),style:{padding:"10px 12px",borderRadius:6,border:"1px solid #ddd",fontSize:16,outline:"none"}})]}),e.jsx("button",{type:"submit",disabled:r,style:{padding:"12px 24px",borderRadius:8,border:"none",background:"#1a1a2e",color:"#fff",fontSize:16,fontWeight:600,cursor:"pointer",opacity:r?.6:1,marginTop:8},children:o(r?"addBook.uploading":"addBook.upload")})]})]})}export{R as AddBookPage};

frontend/dist/assets/AuthPage-Dbb0UvrV.js

@@ -0,0 +1 @@
+import{j as t,X as v,r as o,e as w,h as z}from"./index-BQiEVoRj.js";import{g as A}from"./errors-bLl0IgZb.js";function h({isLogin:n,onToggle:p}){const{t:e}=v(),[i,g]=o.useState(""),[a,f]=o.useState(""),[d,x]=o.useState(""),[c,s]=o.useState(null),[l,u]=o.useState(!1),{login:m,register:y}=w(),b=z(),j=async r=>{if(r.preventDefault(),s(null),!n&&a!==d){s(e("auth.passwordsMismatch"));return}u(!0);try{n?await m(i,a):await y(i,a),b("/")}catch(S){s(A(S,e(n?"auth.loginFailed":"auth.registrationFailed")))}finally{u(!1)}};return t.jsx("div",{style:{display:"flex",justifyContent:"center",alignItems:"center",minHeight:"100vh",background:"#f8f9fa",padding:16},children:t.jsxs("div",{style:{width:"100%",maxWidth:400,background:"#fff",borderRadius:12,padding:32,boxShadow:"0 2px 16px rgba(0,0,0,0.08)"},children:[t.jsx("h1",{style:{fontSize:28,fontWeight:700,color:"#1a1a2e",textAlign:"center",marginBottom:4},children:e("common.appName")}),t.jsx("h2",{style:{fontSize:16,color:"#888",textAlign:"center",marginBottom:24,fontWeight:400},children:e(n?"auth.signIn":"auth.createAccount")}),t.jsxs("form",{onSubmit:j,style:{display:"flex",flexDirection:"column",gap:16},children:[c&&t.jsx("div",{style:{background:"#fde8e8",padding:12,borderRadius:6,color:"#e74c3c",fontSize:14},children:c}),t.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:6},children:[t.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:e("auth.email")}),t.jsx("input",{type:"email",value:i,onChange:r=>g(r.target.value),placeholder:e("auth.emailPlaceholder"),required:!0,style:{padding:"10px 12px",borderRadius:6,border:"1px solid #ddd",fontSize:16,outline:"none"}})]}),t.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:6},children:[t.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:e("auth.password")}),t.jsx("input",{type:"password",value:a,onChange:r=>f(r.target.value),placeholder:e("auth.passwordPlaceholder"),required:!0,minLength:8,style:{padding:"10px 12px",borderRadius:6,border:"1px solid #ddd",fontSize:16,outline:"none"}})]}),!n&&t.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:6},children:[t.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:e("auth.confirmPassword")}),t.jsx("input",{type:"password",value:d,onChange:r=>x(r.target.value),placeholder:e("auth.confirmPasswordPlaceholder"),required:!0,minLength:8,style:{padding:"10px 12px",borderRadius:6,border:"1px solid #ddd",fontSize:16,outline:"none"}})]}),t.jsx("button",{type:"submit",disabled:l,style:{padding:"12px 24px",borderRadius:8,border:"none",background:"#1a1a2e",color:"#fff",fontSize:16,fontWeight:600,cursor:"pointer",opacity:l?.6:1,marginTop:8},children:e(l?n?"auth.signingIn":"auth.creatingAccount":n?"auth.signIn":"auth.createAccount")})]}),t.jsxs("p",{style:{textAlign:"center",marginTop:20,color:"#888",fontSize:14},children:[n?e("auth.noAccount")+" ":e("auth.hasAccount")+" ",t.jsx("button",{onClick:p,style:{background:"none",border:"none",color:"#1a1a2e",fontWeight:600,cursor:"pointer",fontSize:14,textDecoration:"underline"},children:e(n?"auth.register":"auth.signIn")})]})]})})}function W({onToggle:n}){return t.jsx(h,{isLogin:!0,onToggle:n})}function k({onToggle:n}){return t.jsx(h,{isLogin:!1,onToggle:n})}export{W as LoginPage,k as RegisterPage};

frontend/dist/assets/BookmarksNotesPage-BpEBiOkO.js

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+import{X as m,u,r as l,j as e,h as g,i as j}from"./index-BQiEVoRj.js";function N({ebookIdFilter:n,onGoToPassage:i}){const{t:s}=m(),{markersByBook:r,loadBookmarks:c,removeBookmark:k,state:h}=u(),[p,x]=l.useState({});l.useEffect(()=>{c(n)},[c,n]);const d=l.useMemo(()=>{if(!n)return r;const a=Number(n);return r.filter(o=>o.ebookId===a)},[r,n]);if(h.bookmarksLoading)return e.jsx("div",{className:"annotations-loading",children:s("annotations.loading")});if(d.length===0)return e.jsxs("div",{className:"annotations-empty",children:[e.jsx("p",{children:s("annotations.empty")}),e.jsx("p",{style:{fontSize:14,color:"#6b7280",marginTop:8},children:s("annotations.selectTextHint")})]});const b=a=>{x(o=>({...o,[a]:!o[a]}))};return e.jsx("div",{className:"marker-books-list",children:d.map(a=>{const o=p[a.ebookId]??!1;return e.jsxs("section",{className:"marker-book-group",children:[e.jsxs("button",{type:"button",className:"marker-book-header",onClick:()=>b(a.ebookId),children:[e.jsx("span",{className:"marker-book-title",children:a.ebookTitle}),e.jsx("span",{className:"marker-book-count",children:s("annotations.markerCount",{count:String(a.markers.length)})}),e.jsx("span",{className:"marker-book-chevron",children:o?"▸":"▾"})]}),!o&&e.jsx("ul",{className:"marker-thread-list",children:a.markers.map(t=>e.jsxs("li",{className:"marker-thread",children:[e.jsx("div",{className:"marker-thread-meta",children:t.chapter_title?e.jsx("span",{className:"marker-thread-chapter",children:t.chapter_title}):e.jsx("span",{className:"marker-thread-chapter",children:s("annotations.chapterIndex",{index:String(t.chapter_index+1)})})}),t.location_text&&e.jsxs("blockquote",{className:"annotation-quote marker-thread-passage",children:["“",t.location_text,"”"]}),t.content?e.jsx("p",{className:"marker-thread-thought marker-thread-reply",children:t.content}):e.jsx("span",{className:"annotation-kind-badge bookmark-badge",children:s("annotations.bookmarkOnly")}),e.jsxs("div",{className:"annotation-actions",children:[e.jsx("button",{type:"button",className:"btn btn-sm",onClick:()=>i(t.ebook_id,t.epub_cfi),children:s("annotations.goToPassage")}),e.jsx("button",{type:"button",className:"btn btn-sm btn-danger",onClick:()=>k(t.id),children:s("common.delete")})]})]},t.id))})]},a.ebookId)})})}function y(){const{t:n}=m(),i=g(),{bookId:s}=j();return e.jsxs("div",{className:"page bookmarks-notes-page",style:{maxWidth:720,margin:"0 auto",padding:16},children:[e.jsxs("header",{style:{display:"flex",alignItems:"center",gap:12,marginBottom:24},children:[e.jsxs("button",{type:"button",onClick:()=>i("/"),style:{padding:"8px 16px",borderRadius:6,border:"1px solid #ddd",background:"#fff",cursor:"pointer",fontSize:14},children:["← ",n("common.back")]}),e.jsx("h2",{style:{margin:0,fontSize:22,fontWeight:700},children:n("annotations.title")})]}),e.jsx(N,{ebookIdFilter:s,onGoToPassage:(r,c)=>{i(`/read/${r}`,{state:{epubLocation:c}})}})]})}export{y as BookmarksNotesPage};

frontend/dist/assets/Library-2D9sFJJ7.css

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+._container_1fxkh_1{position:absolute;top:100%;left:0;right:0;z-index:100;background:#fff;border:1px solid #e5e7eb;border-top:none;border-radius:0 0 10px 10px;box-shadow:0 8px 24px #0000001f;max-height:320px;overflow-y:auto}._infoText_1fxkh_31{padding:12px 16px;color:#9ca3af;font-size:13px}._suggestionItem_1fxkh_43{display:flex;align-items:center;gap:12px;padding:10px 16px;cursor:pointer;border-bottom:1px solid #f3f4f6;min-height:44px}._suggestionItem_1fxkh_43:hover{background:#f9fafb}._coverImage_1fxkh_71{width:32px;height:48px;object-fit:cover;border-radius:4px}._coverPlaceholder_1fxkh_85{font-size:20px;flex-shrink:0}._bookInfo_1fxkh_95{min-width:0}._bookTitle_1fxkh_103{font-size:14px;font-weight:600;color:#1f2937;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}._bookAuthor_1fxkh_121{font-size:12px;color:#6b7280;margin-top:2px}._menu_ekpcj_1{position:fixed;z-index:9999;min-width:180px;background:#fff;border:1px solid #e5e7eb;border-radius:8px;box-shadow:0 4px 20px #0000001f;padding:4px 0;overflow:hidden}._item_ekpcj_25{display:block;width:100%;padding:10px 16px;border:none;background:transparent;text-align:left;font-size:14px;color:#374151;cursor:pointer;transition:background .1s}._item_ekpcj_25:hover:not(:disabled){background:#f3f4f6}._item_ekpcj_25:disabled{opacity:.5;cursor:not-allowed}._itemDanger_ekpcj_69{color:#dc2626}._itemDanger_ekpcj_69:hover:not(:disabled){background:#fef2f2}._itemLoading_ekpcj_85{color:#6b7280}._separator_ekpcj_93{height:1px;background:#e5e7eb;margin:4px 0}._bookCard_11p5a_1{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 8px #0000000f;cursor:pointer;transition:transform .15s,box-shadow .15s}._bookCard_11p5a_1:hover{transform:translateY(-2px);box-shadow:0 4px 16px #0000001a}._coverProgressBar_11p5a_29{position:absolute;left:0;right:0;bottom:0;height:4px;background:#0000001f}._coverProgressFill_11p5a_47{height:100%;background:#16a34a;transition:width .2s ease}