feat: implement reading pace notifications (US #33)

Backend:
- New hermes app with ReadingGroup, GroupMeeting, GroupMembership models
- NotificationPreference (per-user: enable/disable, frequency daily/weekly)
- PaceNotification model for tracking sent/dismissed notifications
- Pace calculation service comparing current progress vs meeting targets
- API endpoints: pace status, notification preferences CRUD, reminders, dismiss
- Ahead/behind/on_track/completed status determination

Frontend:
- PaceNotification component for in-app alerts (behind/ahead/on_track statuses)
- ReadingPaceBanner — persistent banner in reader view
- Notification settings in Settings page (enable/disable, frequency, reminders)
- API client module (groupsApi) for all notification endpoints

.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

@@ -0,0 +1,40 @@
+node_modules
+dist
+frontend/dist
+frontend/dist/assets
+frontend/dist/assets/index.html
+frontend/dist/assets/index.html.gz
+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
+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
+*.env
+*.DS_Store
+*.vscode
+*.idea
+*.swp
+*.swo

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

@@ -14,7 +14,7 @@ cloud-reader/
 │   │   └── annotations/ # Bookmarks and notes
 │   ├── manage.py
 │   └── requirements.txt
-├── frontend/        # React + Vite + TypeScript (canonical frontend)
+├── frontend/        # React + Vite + TypeScript (web frontend)
 │   ├── src/
 │   │   ├── api/         # API client (axios with JWT refresh)
 │   │   ├── components/  # Reusable components
@@ -23,6 +23,23 @@ cloud-reader/
 │   │   ├── 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
 ```
 
@@ -30,6 +47,9 @@ cloud-reader/
 
 ### Docker (recommended)
 ```bash
+cp env.example .env
+```
+```bash
 docker compose up --build
 ```
 - **Frontend:** http://localhost:5173
@@ -50,8 +70,24 @@ 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

@@ -6,3 +6,11 @@ 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/apps/annotations/admin.py

@@ -5,9 +5,17 @@ from apps.annotations.models import Bookmark, Note
 
 @admin.register(Bookmark)
 class BookmarkAdmin(admin.ModelAdmin):
-    list_display = ("user", "book", "page", "created_at")
-    list_select_related = ("user", "book")
-    search_fields = ("user__email", "book__title", "location_text")
+    list_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",)
 
 

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

@@ -5,7 +5,7 @@ from django.db import models
 
 
 class Bookmark(models.Model):
-    """A saved location in a book that the user can return to."""
+    """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(
@@ -14,18 +14,34 @@ class Bookmark(models.Model):
         related_name="bookmarks",
         db_index=True,
     )
-    book = models.ForeignKey(
-        "books.Book",
+    ebook = models.ForeignKey(
+        "books.EBook",
         on_delete=models.CASCADE,
         related_name="bookmarks",
         db_index=True,
     )
-    page = models.PositiveIntegerField()
+    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)
 
@@ -33,20 +49,20 @@ class Bookmark(models.Model):
         db_table = "annotations_bookmark"
         verbose_name = "Bookmark"
         verbose_name_plural = "Bookmarks"
-        ordering = ["-created_at"]
+        ordering = ["chapter_index", "epub_cfi"]
         constraints = [
             models.UniqueConstraint(
-                fields=["user", "book", "page"],
-                name="uq_bookmark_user_book_page",
+                fields=["user", "ebook", "epub_cfi"],
+                name="uq_bookmark_user_ebook_cfi",
             )
         ]
 
     def __str__(self) -> str:
-        return f"{self.user} @ {self.book} p.{self.page}"
+        return f"{self.user} @ {self.ebook} ch.{self.chapter_index}"
 
 
 class Note(models.Model):
-    """A user-written note attached to a specific location in a book."""
+    """Legacy note model; new UX uses Bookmark.content instead."""
 
     id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
     user = models.ForeignKey(

backend/apps/annotations/serializers.py

@@ -1,62 +1,86 @@
+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):
-    """Serialize Bookmark data with full details."""
-
-    book_title = serializers.CharField(source="book.title", read_only=True)
+    ebook_title = serializers.CharField(source="ebook.title", read_only=True)
 
     class Meta:
         model = Bookmark
         fields = [
             "id",
-            "book",
-            "book_title",
+            "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", "book_title"]
-
-    def validate_page(self, value: int) -> int:
-        if value < 1:
-            raise serializers.ValidationError("Page must be a positive integer.")
-        return value
+        read_only_fields = ["id", "created_at", "updated_at", "ebook_title", "page"]
 
 
 class BookmarkCreateSerializer(serializers.ModelSerializer):
-    """Serializer used for creating bookmarks. Sets user from request context."""
-
     class Meta:
         model = Bookmark
-        fields = ["book", "page", "location_text"]
+        fields = [
+            "ebook",
+            "epub_cfi",
+            "chapter_index",
+            "chapter_title",
+            "location_text",
+            "content",
+            "highlight_color",
+        ]
 
-    def validate_page(self, value: int) -> int:
-        if value < 1:
-            raise serializers.ValidationError("Page must be a positive integer.")
+    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
-        if Bookmark.objects.filter(
-            user=user, book=attrs["book"], page=attrs["page"]
-        ).exists():
+        ebook = attrs["ebook"]
+        epub_cfi = attrs["epub_cfi"]
+        if Bookmark.objects.filter(user=user, ebook=ebook, epub_cfi=epub_cfi).exists():
             raise serializers.ValidationError(
-                {"page": "A bookmark already exists at this page for this book."}
+                {"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):
-    """Serialize Note data with full details."""
-
     book_title = serializers.CharField(source="book.title", read_only=True)
 
     class Meta:
@@ -78,16 +102,8 @@ class NoteSerializer(serializers.ModelSerializer):
             raise serializers.ValidationError("Page must be a positive integer.")
         return value
 
-    def validate_content(self, value: str) -> str:
-        stripped = value.strip()
-        if not stripped:
-            raise serializers.ValidationError("Note content cannot be empty.")
-        return stripped
-
 
 class NoteCreateSerializer(serializers.ModelSerializer):
-    """Serializer used for creating notes. Sets user from request context."""
-
     class Meta:
         model = Note
         fields = ["book", "page", "location_text", "content"]

backend/apps/annotations/tests.py

@@ -6,14 +6,10 @@ from rest_framework import status
 from rest_framework.test import APIClient
 
 from apps.annotations.models import Bookmark, Note
-from apps.books.models import Book
+from apps.books.models import Book, EBook
 from apps.users.models import User
 
 
-# ---------------------------------------------------------------------------
-# Fixtures
-# ---------------------------------------------------------------------------
-
 @pytest.fixture
 def api_client() -> APIClient:
     return APIClient()
@@ -53,12 +49,26 @@ def book() -> Book:
 
 
 @pytest.fixture
-def bookmark(auth_client, user: User, book: Book) -> Bookmark:
+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,
-        book=book,
-        page=42,
+        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="",
     )
 
 
@@ -73,259 +83,84 @@ def note(auth_client, user: User, book: Book) -> Note:
     )
 
 
-# ---------------------------------------------------------------------------
-# Bookmark tests
-# ---------------------------------------------------------------------------
-
 class TestBookmarkList:
     url = reverse("bookmark-list")
 
-    def test_unauthenticated_user_cannot_list(self, api_client: APIClient):
+    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, book: Book
+        self, auth_client: APIClient, user: User, other_user: User, ebook: EBook
     ):
-        Bookmark.objects.create(user=user, book=book, page=1)
-        Bookmark.objects.create(user=other_user, book=book, page=2)
-
+        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
-        assert results[0]["page"] == 1
 
-    def test_list_returns_empty_when_no_bookmarks(
-        self, auth_client: APIClient
-    ):
-        response = auth_client.get(self.url)
+    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 response.data["count"] == 0
-
-    def test_list_orders_by_newest_first(
-        self, auth_client: APIClient, user: User, book: Book
-    ):
-        b1 = Bookmark.objects.create(user=user, book=book, page=1)
-        b2 = Bookmark.objects.create(user=user, book=book, page=2)
-        response = auth_client.get(self.url)
-        results = response.data["results"]
-        assert results[0]["page"] == 2
-        assert results[1]["page"] == 1
-
-    def test_list_includes_book_title(
-        self, auth_client: APIClient, bookmark: Bookmark
-    ):
-        response = auth_client.get(self.url)
-        assert response.status_code == status.HTTP_200_OK
-        assert response.data["results"][0]["book_title"] == "Test Book"
+        assert len(response.data["results"]) == 1
 
 
 class TestBookmarkCreate:
     url = reverse("bookmark-list")
 
-    def test_create_bookmark(self, auth_client: APIClient, book: Book):
-        data = {"book": str(book.id), "page": 10, "location_text": "key insight"}
+    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["page"] == 10
+        assert response.data["content"] == "My thought"
+        assert response.data["ebook"] == ebook.id
 
-    def test_create_bookmark_without_location_text(
-        self, auth_client: APIClient, book: Book
-    ):
-        data = {"book": str(book.id), "page": 5}
+    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["page"] == 5
+        assert response.data["content"] == ""
 
-    def test_duplicate_bookmark_page_is_rejected(
-        self, auth_client: APIClient, bookmark: Bookmark
-    ):
-        data = {"book": str(bookmark.book.id), "page": bookmark.page}
-        response = auth_client.post(self.url, data, format="json")
-        assert response.status_code == status.HTTP_400_BAD_REQUEST
-
-    def test_unauthenticated_user_cannot_create(
-        self, api_client: APIClient, book: Book
-    ):
-        data = {"book": str(book.id), "page": 10}
-        response = api_client.post(self.url, data, format="json")
-        assert response.status_code == status.HTTP_401_UNAUTHORIZED
-
-    def test_invalid_page_rejected(
-        self, auth_client: APIClient, book: Book
-    ):
-        data = {"book": str(book.id), "page": 0}
+    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_get_bookmark(
-        self, auth_client: APIClient, bookmark: Bookmark
-    ):
-        url = reverse("bookmark-detail", args=[str(bookmark.id)])
-        response = auth_client.get(url)
-        assert response.status_code == status.HTTP_200_OK
-        assert response.data["page"] == bookmark.page
-
-    def test_cannot_access_other_users_bookmark(
-        self, api_client: APIClient, other_user: User, bookmark: Bookmark
-    ):
-        api_client.force_authenticate(user=other_user)
-        url = reverse("bookmark-detail", args=[str(bookmark.id)])
-        response = api_client.get(url)
-        assert response.status_code == status.HTTP_404_NOT_FOUND
-
-
-class TestBookmarkDelete:
-    def test_delete_bookmark(
-        self, auth_client: APIClient, bookmark: Bookmark
-    ):
+    def test_delete_bookmark(self, auth_client: APIClient, bookmark: Bookmark):
         url = reverse("bookmark-detail", args=[str(bookmark.id)])
         response = auth_client.delete(url)
         assert response.status_code == status.HTTP_204_NO_CONTENT
-        assert Bookmark.objects.count() == 0
-
-    def test_cannot_delete_other_users_bookmark(
-        self, api_client: APIClient, other_user: User, bookmark: Bookmark
-    ):
-        api_client.force_authenticate(user=other_user)
-        url = reverse("bookmark-detail", args=[str(bookmark.id)])
-        response = api_client.delete(url)
-        assert response.status_code == status.HTTP_404_NOT_FOUND
-
-
-class TestBookmarkFilterByBook:
-    def test_filter_by_book(
-        self, auth_client: APIClient, user: User, book: Book
-    ):
-        other_book = Book.objects.create(title="Other", author="Other")
-        Bookmark.objects.create(user=user, book=book, page=1)
-        Bookmark.objects.create(user=user, book=other_book, page=2)
-
-        url = reverse("bookmark-list")
-        response = auth_client.get(url, {"book": str(book.id)})
-        assert response.status_code == status.HTTP_200_OK
-        assert response.data["count"] == 1
-        assert response.data["results"][0]["page"] == 1
-
-
-# ---------------------------------------------------------------------------
-# Note tests
-# ---------------------------------------------------------------------------
-
-class TestNoteList:
-    url = reverse("note-list")
-
-    def test_unauthenticated_user_cannot_list(self, api_client: APIClient):
-        response = api_client.get(self.url)
-        assert response.status_code == status.HTTP_401_UNAUTHORIZED
-
-    def test_list_returns_user_notes_only(
-        self, auth_client: APIClient, user: User, other_user: User, book: Book
-    ):
-        Note.objects.create(user=user, book=book, page=1, content="My note")
-        Note.objects.create(user=other_user, book=book, page=2, content="Other's note")
-
-        response = auth_client.get(self.url)
-        assert response.status_code == status.HTTP_200_OK
-        results = response.data["results"]
-        assert len(results) == 1
-        assert results[0]["content"] == "My note"
-
-    def test_list_includes_book_title(
-        self, auth_client: APIClient, note: Note
-    ):
-        response = auth_client.get(self.url)
-        assert response.status_code == status.HTTP_200_OK
-        assert response.data["results"][0]["book_title"] == "Test Book"
-
-
-class TestNoteCreate:
-    url = reverse("note-list")
-
-    def test_create_note(self, auth_client: APIClient, book: Book):
-        data = {
-            "book": str(book.id),
-            "page": 20,
-            "location_text": "interesting part",
-            "content": "This is a thoughtful note.",
-        }
-        response = auth_client.post(self.url, data, format="json")
-        assert response.status_code == status.HTTP_201_CREATED
-        assert response.data["content"] == "This is a thoughtful note."
-
-    def test_create_note_without_location_text(
-        self, auth_client: APIClient, book: Book
-    ):
-        data = {"book": str(book.id), "page": 20, "content": "A note."}
-        response = auth_client.post(self.url, data, format="json")
-        assert response.status_code == status.HTTP_201_CREATED
-
-    def test_empty_content_rejected(
-        self, auth_client: APIClient, book: Book
-    ):
-        data = {"book": str(book.id), "page": 20, "content": "   "}
-        response = auth_client.post(self.url, data, format="json")
-        assert response.status_code == status.HTTP_400_BAD_REQUEST
-
-    def test_unauthenticated_user_cannot_create(
-        self, api_client: APIClient, book: Book
-    ):
-        data = {"book": str(book.id), "page": 20, "content": "Note"}
-        response = api_client.post(self.url, data, format="json")
-        assert response.status_code == status.HTTP_401_UNAUTHORIZED
-
-
-class TestNoteUpdate:
-    def test_update_note_content(
-        self, auth_client: APIClient, note: Note
-    ):
-        url = reverse("note-detail", args=[str(note.id)])
-        data = {"content": "Updated note content."}
-        response = auth_client.patch(url, data, format="json")
-        assert response.status_code == status.HTTP_200_OK
-        assert response.data["content"] == "Updated note content."
-
-    def test_cannot_update_other_users_note(
-        self, api_client: APIClient, other_user: User, note: Note
-    ):
-        api_client.force_authenticate(user=other_user)
-        url = reverse("note-detail", args=[str(note.id)])
-        data = {"content": "Hacked!"}
-        response = api_client.patch(url, data, format="json")
-        assert response.status_code == status.HTTP_404_NOT_FOUND
-
-
-class TestNoteDelete:
-    def test_delete_note(self, auth_client: APIClient, note: Note):
-        url = reverse("note-detail", args=[str(note.id)])
-        response = auth_client.delete(url)
-        assert response.status_code == status.HTTP_204_NO_CONTENT
-        assert Note.objects.count() == 0
-
-    def test_batch_delete_notes(
-        self, auth_client: APIClient, user: User, book: Book
-    ):
-        n1 = Note.objects.create(user=user, book=book, page=1, content="A")
-        n2 = Note.objects.create(user=user, book=book, page=2, content="B")
-        url = reverse("note-batch-delete")
-        response = auth_client.delete(url, {"ids": [str(n1.id), str(n2.id)]}, format="json")
-        assert response.status_code == status.HTTP_200_OK
-        assert response.data["deleted"] == 2
-
-
-class TestNoteFilterByBook:
-    def test_filter_by_book(
-        self, auth_client: APIClient, user: User, book: Book
-    ):
-        other_book = Book.objects.create(title="Other", author="Other")
-        Note.objects.create(user=user, book=book, page=1, content="In book")
-        Note.objects.create(user=user, book=other_book, page=2, content="In other")
-
-        url = reverse("note-list")
-        response = auth_client.get(url, {"book": str(book.id)})
-        assert response.status_code == status.HTTP_200_OK
-        assert response.data["count"] == 1
-        assert response.data["results"][0]["content"] == "In book"

backend/apps/annotations/views.py

@@ -16,14 +16,14 @@ from apps.annotations.serializers import (
 
 
 class BookmarkViewSet(viewsets.ModelViewSet):
-    """CRUD for user bookmarks. Users can only manage their own bookmarks."""
+    """CRUD for user ebook markers (passage anchors + optional thoughts)."""
 
     permission_classes = [IsAuthenticated, IsOwner]
     filter_backends = [DjangoFilterBackend, SearchFilter, OrderingFilter]
-    filterset_fields = ["book"]
-    search_fields = ["location_text"]
-    ordering_fields = ["created_at", "page"]
-    ordering = ["-created_at"]
+    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":
@@ -31,16 +31,13 @@ class BookmarkViewSet(viewsets.ModelViewSet):
         return BookmarkSerializer
 
     def get_queryset(self):
-        return Bookmark.objects.filter(user=self.request.user).select_related(
-            "book"
-        )
+        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):
-        """Delete multiple bookmarks by id list."""
         ids = request.data.get("ids", [])
         if not ids:
             return Response(
@@ -49,13 +46,11 @@ class BookmarkViewSet(viewsets.ModelViewSet):
         deleted, _ = Bookmark.objects.filter(
             id__in=ids, user=request.user
         ).delete()
-        return Response(
-            {"deleted": deleted}, status=status.HTTP_200_OK
-        )
+        return Response({"deleted": deleted}, status=status.HTTP_200_OK)
 
 
 class NoteViewSet(viewsets.ModelViewSet):
-    """CRUD for user notes. Users can only manage their own notes."""
+    """Legacy notes API (catalog Book FK)."""
 
     permission_classes = [IsAuthenticated, IsOwner]
     filter_backends = [DjangoFilterBackend, SearchFilter, OrderingFilter]
@@ -70,16 +65,13 @@ class NoteViewSet(viewsets.ModelViewSet):
         return NoteSerializer
 
     def get_queryset(self):
-        return Note.objects.filter(user=self.request.user).select_related(
-            "book"
-        )
+        return Note.objects.filter(user=self.request.user).select_related("book")
 
     def perform_create(self, serializer):
         serializer.save(user=self.request.user)
 
     @action(detail=False, methods=["delete"], url_path="batch-delete")
     def batch_delete(self, request):
-        """Delete multiple notes by id list."""
         ids = request.data.get("ids", [])
         if not ids:
             return Response(
@@ -88,6 +80,4 @@ class NoteViewSet(viewsets.ModelViewSet):
         deleted, _ = Note.objects.filter(
             id__in=ids, user=request.user
         ).delete()
-        return Response(
-            {"deleted": deleted}, status=status.HTTP_200_OK
-        )
+        return Response({"deleted": deleted}, status=status.HTTP_200_OK)

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

@@ -12,19 +12,6 @@ class ReadingStatus(models.TextChoices):
     DNF = "dnf", "Did Not Finish"
 
 
-class FontStyle(models.TextChoices):
-    SANS_SERIF = "sans-serif", "Sans Serif"
-    SERIF = "serif", "Serif"
-    MONOSPACE = "monospace", "Monospace"
-
-
-class BackgroundColor(models.TextChoices):
-    WHITE = "#ffffff", "White"
-    SEPIA = "#f4e4c1", "Sepia"
-    DARK = "#1a1a2e", "Dark"
-    GREEN = "#c7edcc", "Green"
-
-
 class Book(models.Model):
     title = models.CharField(max_length=512, db_index=True)
     author = models.CharField(max_length=256, blank=True, default="", db_index=True)
@@ -49,8 +36,12 @@ class Book(models.Model):
 
 class EBook(models.Model):
     user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="ebooks")
-    title = models.CharField(max_length=512)
-    author = models.CharField(max_length=256, blank=True, default="")
+    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)
@@ -70,6 +61,24 @@ class EBook(models.Model):
         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:
@@ -78,11 +87,34 @@ def _auto_delete_ebook_file(sender, instance, **kwargs):
         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:
@@ -93,17 +125,32 @@ class ReadingProgress(models.Model):
     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).
 
-class ReadingSettings(models.Model):
-    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="reading_settings")
-    font_size = models.IntegerField(default=18)
-    font_style = models.CharField(max_length=20, choices=FontStyle.choices, default=FontStyle.SANS_SERIF.value)
-    background_color = models.CharField(max_length=7, choices=BackgroundColor.choices, default=BackgroundColor.WHITE.value)
-    updated_at = models.DateTimeField(auto_now=True)
+        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
 
-    class Meta:
-        db_table = "books_reading_settings"
-        verbose_name_plural = "reading settings"
-
-    def __str__(self):
-        return f"Settings for {self.user}"
+        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

@@ -1,6 +1,46 @@
 from rest_framework import serializers
 
-from apps.books.models import Book, EBook, FontStyle, BackgroundColor, ReadingProgress, ReadingSettings, ReadingStatus
+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):
@@ -29,11 +69,20 @@ class BookSerializer(serializers.ModelSerializer):
 
 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", "cover_image", "created_at", "progress"]
+        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:
@@ -41,15 +90,32 @@ class EBookListSerializer(serializers.ModelSerializer):
         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", "file_url", "cover_image", "created_at", "updated_at", "progress"]
+        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")
@@ -60,7 +126,11 @@ class EBookDetailSerializer(serializers.ModelSerializer):
     def get_progress(self, obj):
         try:
             rp = obj.reading_progress
-            return {"current_position": rp.current_position, "last_page": rp.last_page}
+            return {
+                "current_position": rp.current_position,
+                "last_page": rp.last_page,
+                "epub_location": rp.epub_location,
+            }
         except ReadingProgress.DoesNotExist:
             return None
 
@@ -81,15 +151,35 @@ class EBookUploadSerializer(serializers.ModelSerializer):
         return value
 
     def create(self, validated_data):
+        import os
+
         validated_data["user"] = self.context["request"].user
-        return super().create(validated_data)
+        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"]
-        extra_kwargs = {"current_position": {"required": True, "min_value": 0.0, "max_value": 100.0}}
+        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:
@@ -97,24 +187,45 @@ class ReadingProgressSerializer(serializers.ModelSerializer):
         return value
 
 
-class ReadingSettingsSerializer(serializers.ModelSerializer):
+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 = ReadingSettings
-        fields = ["font_size", "font_style", "background_color"]
+        model = DownloadRecord
+        fields = [
+            "id", "ebook_id", "ebook_title", "author", "filename", "file_url",
+            "file_size", "cover_image", "format", "downloaded_at", "progress",
+        ]
 
-    def validate_font_size(self, value):
-        if value < 12 or value > 36:
-            raise serializers.ValidationError("Font size must be between 12 and 36.")
-        return value
+    def get_filename(self, obj):
+        return obj.ebook.filename()
 
-    def validate_font_style(self, value):
-        valid = [s.value for s in FontStyle]
-        if value not in valid:
-            raise serializers.ValidationError(f"Font style must be one of: {', '.join(valid)}")
-        return value
+    def 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 validate_background_color(self, value):
-        valid = [c.value for c in BackgroundColor]
-        if value not in valid:
-            raise serializers.ValidationError(f"Background color must be one of: {', '.join(valid)}")
-        return value
+    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

@@ -1,16 +1,13 @@
 from django.urls import include, path
 from rest_framework.routers import DefaultRouter
 
-from apps.books.views import BookViewSet, EBookViewSet, ReadingSettingsViewSet
+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")
 
-ebook_router = DefaultRouter()
-ebook_router.register(r"ebooks", EBookViewSet, basename="ebook")
-
 urlpatterns = [
+    path("settings/", book_reading_settings_view, name="book-settings"),
     path("", include(router.urls)),
-    path("", include(ebook_router.urls)),
-    path("settings/", ReadingSettingsViewSet.as_view({"get": "list", "patch": "partial_update"}), name="reading-settings"),
 ]

backend/apps/books/views.py

@@ -1,20 +1,30 @@
+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
+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, EBook, ReadingProgress, ReadingSettings
+from apps.books.models import Book, BookChapter, DownloadRecord, EBook, ReadingProgress
 from apps.books.serializers import (
-    BookDetailSerializer, BookListSerializer, BookSerializer,
-    EBookDetailSerializer, EBookListSerializer, EBookUploadSerializer,
-    ReadingProgressSerializer, ReadingSettingsSerializer,
+    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):
@@ -50,6 +60,23 @@ class BookViewSet(viewsets.ModelViewSet):
         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:
@@ -63,12 +90,37 @@ class EBookViewSet(viewsets.ModelViewSet):
     def get_serializer_class(self):
         if self.action == "create":
             return EBookUploadSerializer
-        if self.action == "list":
+        if self.action in ("list",):
             return EBookListSerializer
+        if self.action in ("toc",):
+            return BookChapterSerializer
         return EBookDetailSerializer
 
     def get_queryset(self):
-        return EBook.objects.filter(user=self.request.user).select_related("reading_progress", "user")
+        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:
@@ -82,22 +134,193 @@ class EBookViewSet(viewsets.ModelViewSet):
         serializer.save()
         return Response(serializer.data)
 
-
-class ReadingSettingsViewSet(viewsets.GenericViewSet):
-    permission_classes = [IsAuthenticated]
-    serializer_class = ReadingSettingsSerializer
-
-    def get_queryset(self):
-        return ReadingSettings.objects.filter(user=self.request.user)
-
-    def list(self, request: Request) -> Response:
-        settings_obj, _created = ReadingSettings.objects.get_or_create(user=request.user)
-        serializer = self.get_serializer(settings_obj)
+    @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)
 
-    def partial_update(self, request: Request) -> Response:
-        settings_obj, _created = ReadingSettings.objects.get_or_create(user=request.user)
-        serializer = self.get_serializer(settings_obj, data=request.data, partial=True)
+    @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/groups/admin.py

@@ -0,0 +1,38 @@
+from django.contrib import admin
+
+from apps.groups.models import (
+    GroupMeeting,
+    GroupMembership,
+    NotificationPreference,
+    PaceNotification,
+    ReadingGroup,
+)
+
+
+@admin.register(ReadingGroup)
+class ReadingGroupAdmin(admin.ModelAdmin):
+    list_display = ["name", "created_by", "created_at"]
+    search_fields = ["name"]
+
+
+@admin.register(GroupMembership)
+class GroupMembershipAdmin(admin.ModelAdmin):
+    list_display = ["user", "group", "role", "joined_at"]
+    list_filter = ["role"]
+
+
+@admin.register(GroupMeeting)
+class GroupMeetingAdmin(admin.ModelAdmin):
+    list_display = ["group", "title", "target_section_label", "scheduled_at"]
+    list_filter = ["group"]
+
+
+@admin.register(NotificationPreference)
+class NotificationPreferenceAdmin(admin.ModelAdmin):
+    list_display = ["user", "pace_notifications_enabled", "reminder_enabled", "frequency"]
+
+
+@admin.register(PaceNotification)
+class PaceNotificationAdmin(admin.ModelAdmin):
+    list_display = ["user", "meeting", "status", "created_at"]
+    list_filter = ["status"]

backend/apps/groups/apps.py

@@ -0,0 +1,8 @@
+from django.apps import AppConfig
+
+
+class GroupsConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.groups"
+    verbose_name = "Reading Groups"
+    label = "groups"

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

@@ -0,0 +1,109 @@
+# Generated by Django 5.1.7 on 2026-06-20 19:22
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('books', '0003_readingprogress_epub_location'),
+        ('users', '0001_initial'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='NotificationPreference',
+            fields=[
+                ('user', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, primary_key=True, related_name='notification_preference', serialize=False, to=settings.AUTH_USER_MODEL)),
+                ('pace_notifications_enabled', models.BooleanField(default=True)),
+                ('reminder_enabled', models.BooleanField(default=True)),
+                ('frequency', models.CharField(choices=[('daily', 'Daily'), ('weekly', 'Weekly')], default='daily', max_length=16)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                'verbose_name': 'Notification Preference',
+                'verbose_name_plural': 'Notification Preferences',
+                'db_table': 'groups_notification_preference',
+            },
+        ),
+        migrations.CreateModel(
+            name='ReadingGroup',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(db_index=True, max_length=256)),
+                ('description', models.TextField(blank=True, default='')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('book', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='reading_groups', to='books.book')),
+                ('created_by', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='created_groups', to=settings.AUTH_USER_MODEL)),
+                ('ebook', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='reading_groups', to='books.ebook')),
+            ],
+            options={
+                'verbose_name': 'Reading Group',
+                'verbose_name_plural': 'Reading Groups',
+                'db_table': 'groups_reading_group',
+                'ordering': ['-created_at'],
+            },
+        ),
+        migrations.CreateModel(
+            name='GroupMeeting',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(blank=True, default='', max_length=512)),
+                ('scheduled_at', models.DateTimeField(db_index=True)),
+                ('target_section', models.PositiveIntegerField(default=0, help_text='Target chapter/section index to reach by this meeting')),
+                ('target_section_label', models.CharField(blank=True, default='', help_text="Human-readable label for the target section (e.g. 'Section 3')", max_length=512)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('group', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='meetings', to='groups.readinggroup')),
+            ],
+            options={
+                'verbose_name': 'Group Meeting',
+                'verbose_name_plural': 'Group Meetings',
+                'db_table': 'groups_meeting',
+                'ordering': ['scheduled_at'],
+            },
+        ),
+        migrations.CreateModel(
+            name='PaceNotification',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('status', models.CharField(choices=[('pending', 'Pending'), ('sent', 'Sent'), ('dismissed', 'Dismissed')], default='pending', max_length=16)),
+                ('current_section', models.PositiveIntegerField(default=0)),
+                ('target_section', models.PositiveIntegerField(default=0)),
+                ('ahead_behind_delta', models.IntegerField(default=0)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('ebook', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='pace_notifications', to='books.ebook')),
+                ('meeting', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='pace_notifications', to='groups.groupmeeting')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='pace_notifications', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'Pace Notification',
+                'verbose_name_plural': 'Pace Notifications',
+                'db_table': 'groups_pace_notification',
+                'ordering': ['-created_at'],
+                'indexes': [models.Index(fields=['user', 'meeting', 'ebook'], name='groups_pace_user_id_18e929_idx')],
+            },
+        ),
+        migrations.CreateModel(
+            name='GroupMembership',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('role', models.CharField(choices=[('admin', 'Admin'), ('member', 'Member')], default='member', max_length=16)),
+                ('joined_at', models.DateTimeField(auto_now_add=True)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='group_memberships', to=settings.AUTH_USER_MODEL)),
+                ('group', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='memberships', to='groups.readinggroup')),
+            ],
+            options={
+                'verbose_name': 'Group Membership',
+                'verbose_name_plural': 'Group Memberships',
+                'db_table': 'groups_membership',
+                'indexes': [models.Index(fields=['user', 'group'], name='groups_memb_user_id_9cda7e_idx')],
+                'unique_together': {('user', 'group')},
+            },
+        ),
+    ]

backend/apps/groups/models.py

@@ -0,0 +1,190 @@
+from __future__ import annotations
+
+from django.conf import settings
+from django.db import models
+
+
+class FrequencyChoice(models.TextChoices):
+    DAILY = "daily", "Daily"
+    WEEKLY = "weekly", "Weekly"
+
+
+class MembershipRole(models.TextChoices):
+    ADMIN = "admin", "Admin"
+    MEMBER = "member", "Member"
+
+
+class NotificationStatus(models.TextChoices):
+    PENDING = "pending", "Pending"
+    SENT = "sent", "Sent"
+    DISMISSED = "dismissed", "Dismissed"
+
+
+class ReadingGroup(models.Model):
+    """A group of users reading a book together with scheduled meetings."""
+
+    name = models.CharField(max_length=256, db_index=True)
+    description = models.TextField(blank=True, default="")
+    book = models.ForeignKey(
+        "books.Book",
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name="reading_groups",
+    )
+    ebook = models.ForeignKey(
+        "books.EBook",
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name="reading_groups",
+    )
+    created_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="created_groups",
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = "groups_reading_group"
+        verbose_name = "Reading Group"
+        verbose_name_plural = "Reading Groups"
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        return self.name
+
+
+class GroupMembership(models.Model):
+    """User membership in a reading group."""
+
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="group_memberships",
+    )
+    group = models.ForeignKey(
+        ReadingGroup,
+        on_delete=models.CASCADE,
+        related_name="memberships",
+    )
+    role = models.CharField(
+        max_length=16,
+        choices=MembershipRole.choices,
+        default=MembershipRole.MEMBER,
+    )
+    joined_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = "groups_membership"
+        verbose_name = "Group Membership"
+        verbose_name_plural = "Group Memberships"
+        unique_together = [("user", "group")]
+        indexes = [models.Index(fields=["user", "group"])]
+
+    def __str__(self) -> str:
+        return f"{self.user} in {self.group}"
+
+
+class GroupMeeting(models.Model):
+    """A scheduled meeting for a reading group with a target section."""
+
+    group = models.ForeignKey(
+        ReadingGroup,
+        on_delete=models.CASCADE,
+        related_name="meetings",
+    )
+    title = models.CharField(max_length=512, blank=True, default="")
+    scheduled_at = models.DateTimeField(db_index=True)
+    target_section = models.PositiveIntegerField(
+        default=0,
+        help_text="Target chapter/section index to reach by this meeting",
+    )
+    target_section_label = models.CharField(
+        max_length=512,
+        blank=True,
+        default="",
+        help_text="Human-readable label for the target section (e.g. 'Section 3')",
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = "groups_meeting"
+        verbose_name = "Group Meeting"
+        verbose_name_plural = "Group Meetings"
+        ordering = ["scheduled_at"]
+
+    def __str__(self) -> str:
+        return f"{self.group.name} — {self.title or self.target_section_label} ({self.scheduled_at.date()})"
+
+
+class NotificationPreference(models.Model):
+    """Per-user notification settings for reading pace alerts."""
+
+    user = models.OneToOneField(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="notification_preference",
+        primary_key=True,
+    )
+    pace_notifications_enabled = models.BooleanField(default=True)
+    reminder_enabled = models.BooleanField(default=True)
+    frequency = models.CharField(
+        max_length=16,
+        choices=FrequencyChoice.choices,
+        default=FrequencyChoice.DAILY,
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "groups_notification_preference"
+        verbose_name = "Notification Preference"
+        verbose_name_plural = "Notification Preferences"
+
+    def __str__(self) -> str:
+        return f"{self.user} — pace={'on' if self.pace_notifications_enabled else 'off'}, freq={self.frequency}"
+
+
+class PaceNotification(models.Model):
+    """Tracks reading pace notifications sent to users to avoid duplicates."""
+
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="pace_notifications",
+    )
+    meeting = models.ForeignKey(
+        GroupMeeting,
+        on_delete=models.CASCADE,
+        related_name="pace_notifications",
+    )
+    ebook = models.ForeignKey(
+        "books.EBook",
+        on_delete=models.CASCADE,
+        related_name="pace_notifications",
+        null=True,
+        blank=True,
+    )
+    status = models.CharField(
+        max_length=16,
+        choices=NotificationStatus.choices,
+        default=NotificationStatus.PENDING,
+    )
+    current_section = models.PositiveIntegerField(default=0)
+    target_section = models.PositiveIntegerField(default=0)
+    ahead_behind_delta = models.IntegerField(default=0)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = "groups_pace_notification"
+        verbose_name = "Pace Notification"
+        verbose_name_plural = "Pace Notifications"
+        ordering = ["-created_at"]
+        indexes = [
+            models.Index(fields=["user", "meeting", "ebook"]),
+        ]
+
+    def __str__(self) -> str:
+        return f"{self.user} — meeting {self.meeting_id}: {self.get_status_display()}"

backend/apps/groups/serializers.py

@@ -0,0 +1,137 @@
+from __future__ import annotations
+
+from rest_framework import serializers
+
+from apps.groups.models import (
+    FrequencyChoice,
+    GroupMeeting,
+    GroupMembership,
+    NotificationPreference,
+    PaceNotification,
+    ReadingGroup,
+)
+from apps.groups.services.pace import PaceStatus
+
+
+class NotificationPreferenceSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = NotificationPreference
+        fields = [
+            "pace_notifications_enabled",
+            "reminder_enabled",
+            "frequency",
+        ]
+
+    def validate_frequency(self, value: str) -> str:
+        valid = {choice[0] for choice in FrequencyChoice.choices}
+        if value not in valid:
+            raise serializers.ValidationError(
+                f"Frequency must be one of: {', '.join(valid)}"
+            )
+        return value
+
+
+class GroupMeetingSerializer(serializers.ModelSerializer):
+    group_name = serializers.CharField(source="group.name", read_only=True)
+
+    class Meta:
+        model = GroupMeeting
+        fields = [
+            "id",
+            "group",
+            "group_name",
+            "title",
+            "scheduled_at",
+            "target_section",
+            "target_section_label",
+            "created_at",
+        ]
+        read_only_fields = ["id", "created_at"]
+
+    def validate_target_section(self, value: int) -> int:
+        if value < 0:
+            raise serializers.ValidationError("Target section must be non-negative.")
+        return value
+
+
+class ReadingGroupSerializer(serializers.ModelSerializer):
+    member_count = serializers.SerializerMethodField()
+    meeting_count = serializers.SerializerMethodField()
+
+    class Meta:
+        model = ReadingGroup
+        fields = [
+            "id",
+            "name",
+            "description",
+            "book",
+            "ebook",
+            "created_by",
+            "created_at",
+            "member_count",
+            "meeting_count",
+        ]
+        read_only_fields = ["id", "created_by", "created_at"]
+
+    def get_member_count(self, obj: ReadingGroup) -> int:
+        return obj.memberships.count()
+
+    def get_meeting_count(self, obj: ReadingGroup) -> int:
+        return obj.meetings.count()
+
+
+class GroupMembershipSerializer(serializers.ModelSerializer):
+    user_email = serializers.CharField(source="user.email", read_only=True)
+    group_name = serializers.CharField(source="group.name", read_only=True)
+
+    class Meta:
+        model = GroupMembership
+        fields = ["id", "user", "user_email", "group", "group_name", "role", "joined_at"]
+        read_only_fields = ["id", "joined_at"]
+
+
+class PaceNotificationSerializer(serializers.ModelSerializer):
+    status_display = serializers.CharField(source="get_status_display", read_only=True)
+
+    class Meta:
+        model = PaceNotification
+        fields = [
+            "id",
+            "user",
+            "meeting",
+            "ebook",
+            "status",
+            "status_display",
+            "current_section",
+            "target_section",
+            "ahead_behind_delta",
+            "created_at",
+        ]
+        read_only_fields = ["id", "created_at"]
+
+
+class PaceStatusSerializer(serializers.Serializer):
+    meeting_id = serializers.IntegerField()
+    meeting_title = serializers.CharField()
+    scheduled_at = serializers.CharField()
+    target_section = serializers.IntegerField()
+    target_section_label = serializers.CharField()
+    current_section = serializers.IntegerField()
+    ahead_behind_delta = serializers.IntegerField()
+    status = serializers.CharField()
+    days_until_meeting = serializers.IntegerField()
+    sections_to_catch_up = serializers.IntegerField()
+    ebook_id = serializers.IntegerField()
+    ebook_title = serializers.CharField()
+
+
+class ReminderSerializer(serializers.Serializer):
+    meeting_id = serializers.IntegerField()
+    meeting_title = serializers.CharField()
+    scheduled_at = serializers.CharField()
+    target_section = serializers.IntegerField()
+    target_section_label = serializers.CharField()
+    group_name = serializers.CharField()
+    hours_until = serializers.IntegerField()
+    ebook_id = serializers.IntegerField()
+    ebook_title = serializers.CharField()

backend/apps/groups/services/pace.py

@@ -0,0 +1,219 @@
+"""Pace calculation service for reading progress vs meeting targets."""
+
+from __future__ import annotations
+
+import logging
+from datetime import datetime, timedelta
+from typing import TypedDict
+
+from django.db.models import QuerySet
+from django.utils import timezone
+
+from apps.books.models import EBook, ReadingProgress
+from apps.groups.models import (
+    GroupMeeting,
+    GroupMembership,
+    NotificationPreference,
+    PaceNotification,
+    NotificationStatus,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class PaceStatus(TypedDict):
+    meeting_id: int
+    meeting_title: str
+    scheduled_at: str
+    target_section: int
+    target_section_label: str
+    current_section: int
+    ahead_behind_delta: int
+    status: str  # "ahead", "behind", "on_track", "completed"
+    days_until_meeting: int
+    sections_to_catch_up: int
+    ebook_id: int
+    ebook_title: str
+
+
+def get_relevant_ebooks_for_user(user) -> QuerySet[EBook]:
+    """Return ebooks that belong to groups the user is a member of."""
+    group_ids = (
+        GroupMembership.objects.filter(user=user)
+        .values_list("group_id", flat=True)
+    )
+    return (
+        EBook.objects.filter(reading_groups__in=group_ids)
+        .select_related("reading_progress")
+        .prefetch_related("chapters")
+        .distinct()
+    )
+
+
+def calculate_pace(
+    user,
+    ebook: EBook | None = None,
+    meeting: GroupMeeting | None = None,
+) -> list[PaceStatus]:
+    """Calculate reading pace for a user's upcoming meetings.
+
+    Compares the user's current reading progress (chapter index) against
+    the target section for each upcoming meeting within 3 days.
+    """
+    now = timezone.now()
+    three_days_from_now = now + timedelta(days=3)
+
+    # Find upcoming meetings for groups the user belongs to
+    user_group_ids = (
+        GroupMembership.objects.filter(user=user)
+        .values_list("group_id", flat=True)
+    )
+    meetings_qs = GroupMeeting.objects.filter(
+        group_id__in=user_group_ids,
+        scheduled_at__gte=now,
+        scheduled_at__lte=three_days_from_now,
+    ).select_related("group", "group__ebook")
+
+    if meeting:
+        meetings_qs = meetings_qs.filter(pk=meeting.pk)
+
+    meetings = list(meetings_qs)
+
+    results: list[PaceStatus] = []
+
+    for m in meetings:
+        group_ebook = m.group.ebook
+        ebooks_to_check: list[EBook] = []
+
+        if ebook:
+            ebooks_to_check = [ebook]
+        elif group_ebook:
+            ebooks_to_check = [group_ebook]
+        else:
+            # Check all ebooks in the group
+            ebooks_to_check = list(
+                EBook.objects.filter(reading_groups=m.group)
+                .select_related("reading_progress")
+                .prefetch_related("chapters")
+            )
+
+        for eb in ebooks_to_check:
+            pace = _compute_single_pace(user, m, eb, now)
+            if pace:
+                results.append(pace)
+
+    return results
+
+
+def _compute_single_pace(
+    user,
+    meeting: GroupMeeting,
+    ebook: EBook,
+    now: datetime,
+) -> PaceStatus | None:
+    """Compute pace for one user + meeting + ebook combination."""
+    try:
+        progress = ebook.reading_progress
+    except ReadingProgress.DoesNotExist:
+        # No progress yet — user hasn't started reading
+        return None
+
+    # Current section: based on last_page (chapter index) or computed from progress %
+    if progress.last_page > 0:
+        current_section = progress.last_page
+    elif progress.current_position > 0:
+        chapter_count = ebook.chapters.count() or ebook.page_count or 1
+        current_section = max(1, int((progress.current_position / 100) * chapter_count))
+    else:
+        current_section = 0
+
+    target_section = meeting.target_section or 0
+    if target_section == 0:
+        return None
+
+    delta = current_section - target_section
+    days_until = max(0, (meeting.scheduled_at - now).days)
+
+    if current_section >= target_section:
+        if current_section >= target_section and progress.current_position > 0:
+            status = "completed"
+        else:
+            status = "ahead"
+    elif delta >= -1:
+        status = "on_track"
+    else:
+        status = "behind"
+
+    return PaceStatus(
+        meeting_id=meeting.pk,
+        meeting_title=meeting.title or meeting.target_section_label,
+        scheduled_at=meeting.scheduled_at.isoformat(),
+        target_section=target_section,
+        target_section_label=meeting.target_section_label,
+        current_section=current_section,
+        ahead_behind_delta=delta,
+        status=status,
+        days_until_meeting=days_until,
+        sections_to_catch_up=max(0, target_section - current_section),
+        ebook_id=ebook.pk,
+        ebook_title=ebook.title,
+    )
+
+
+def should_send_notification(
+    user,
+    meeting: GroupMeeting,
+    ebook: EBook,
+) -> bool:
+    """Check if a pace notification should be sent based on user preferences."""
+    pref, _ = NotificationPreference.objects.get_or_create(user=user)
+
+    if not pref.pace_notifications_enabled:
+        return False
+
+    # Check if notification was already sent today
+    today = timezone.now().date()
+    existing = PaceNotification.objects.filter(
+        user=user,
+        meeting=meeting,
+        ebook=ebook,
+        created_at__date=today,
+    ).exclude(status=NotificationStatus.DISMISSED)
+
+    if existing.exists():
+        return False
+
+    # Frequency check
+    if pref.frequency == "weekly":
+        week_ago = today - timedelta(days=7)
+        recent = PaceNotification.objects.filter(
+            user=user,
+            meeting=meeting,
+            ebook=ebook,
+            created_at__date__gte=week_ago,
+        ).exclude(status=NotificationStatus.DISMISSED)
+        if recent.exists():
+            return False
+
+    return True
+
+
+def get_reminder_meetings(user) -> list[GroupMeeting]:
+    """Get meetings that are within 24 hours for reminder notifications."""
+    now = timezone.now()
+    tomorrow = now + timedelta(days=1)
+
+    user_group_ids = (
+        GroupMembership.objects.filter(user=user)
+        .values_list("group_id", flat=True)
+    )
+
+    return list(
+        GroupMeeting.objects.filter(
+            group_id__in=user_group_ids,
+            scheduled_at__gte=now,
+            scheduled_at__lte=tomorrow,
+        )
+        .select_related("group", "group__ebook")
+        .order_by("scheduled_at")
+    )

backend/apps/groups/urls.py

@@ -0,0 +1,23 @@
+from django.urls import include, path
+from rest_framework.routers import DefaultRouter
+
+from apps.groups.views import (
+    GroupMeetingViewSet,
+    ReadingGroupViewSet,
+    dismiss_pace_notification_view,
+    notification_preferences_view,
+    pace_status_view,
+    reminder_view,
+)
+
+router = DefaultRouter()
+router.register(r"groups", ReadingGroupViewSet, basename="reading-group")
+router.register(r"meetings", GroupMeetingViewSet, basename="group-meeting")
+
+urlpatterns = [
+    path("", include(router.urls)),
+    path("notifications/preferences/", notification_preferences_view, name="notification-preferences"),
+    path("notifications/pace/", pace_status_view, name="pace-status"),
+    path("notifications/dismiss/", dismiss_pace_notification_view, name="dismiss-pace"),
+    path("notifications/reminders/", reminder_view, name="meeting-reminders"),
+]

backend/apps/groups/views.py

@@ -0,0 +1,207 @@
+from __future__ import annotations
+
+from django.db.models import QuerySet
+from rest_framework import permissions, status, viewsets
+from rest_framework.decorators import action, api_view, permission_classes
+from rest_framework.permissions import IsAuthenticated
+from rest_framework.request import Request
+from rest_framework.response import Response
+
+from apps.books.models import EBook
+from apps.groups.models import (
+    GroupMeeting,
+    GroupMembership,
+    NotificationPreference,
+    PaceNotification,
+    NotificationStatus,
+    ReadingGroup,
+)
+from apps.groups.serializers import (
+    GroupMeetingSerializer,
+    GroupMembershipSerializer,
+    NotificationPreferenceSerializer,
+    PaceNotificationSerializer,
+    PaceStatusSerializer,
+    ReadingGroupSerializer,
+    ReminderSerializer,
+)
+from apps.groups.services.pace import (
+    calculate_pace,
+    get_reminder_meetings,
+    should_send_notification,
+)
+
+
+class IsGroupMember(permissions.BasePermission):
+    """Only allow group members to access group resources."""
+
+    def has_object_permission(self, request: Request, view: object, obj: ReadingGroup) -> bool:
+        return obj.memberships.filter(user=request.user).exists()
+
+
+class ReadingGroupViewSet(viewsets.ModelViewSet):
+    permission_classes = [IsAuthenticated, IsGroupMember]
+    serializer_class = ReadingGroupSerializer
+
+    def get_queryset(self) -> QuerySet[ReadingGroup]:
+        return (
+            ReadingGroup.objects.filter(memberships__user=self.request.user)
+            .prefetch_related("memberships", "meetings")
+            .distinct()
+        )
+
+    def perform_create(self, serializer) -> None:
+        group = serializer.save(created_by=self.request.user)
+        GroupMembership.objects.create(
+            user=self.request.user,
+            group=group,
+            role="admin",
+        )
+
+    @action(detail=False, methods=["get"], url_path="all")
+    def all_groups(self, request: Request) -> Response:
+        """Return all groups (for discovery)."""
+        qs = ReadingGroup.objects.all().prefetch_related("memberships", "meetings")
+        page = self.paginate_queryset(qs)
+        if page is not None:
+            serializer = self.get_serializer(page, many=True)
+            return self.get_paginated_response(serializer.data)
+        serializer = self.get_serializer(qs, many=True)
+        return Response(serializer.data)
+
+
+class GroupMeetingViewSet(viewsets.ModelViewSet):
+    permission_classes = [IsAuthenticated]
+    serializer_class = GroupMeetingSerializer
+
+    def get_queryset(self) -> QuerySet[GroupMeeting]:
+        user_group_ids = (
+            GroupMembership.objects.filter(user=self.request.user)
+            .values_list("group_id", flat=True)
+        )
+        return GroupMeeting.objects.filter(group_id__in=user_group_ids).select_related(
+            "group"
+        )
+
+    def perform_create(self, serializer) -> None:
+        group = serializer.validated_data["group"]
+        if not group.memberships.filter(user=self.request.user).exists():
+            raise permissions.PermissionDenied("You must be a group member to create meetings.")
+        serializer.save()
+
+    @action(detail=False, methods=["get"], url_path="upcoming")
+    def upcoming(self, request: Request) -> Response:
+        """Return upcoming meetings for the user's groups (within 3 days)."""
+        from django.utils import timezone
+        from datetime import timedelta
+
+        now = timezone.now()
+        three_days = now + timedelta(days=3)
+        qs = self.get_queryset().filter(
+            scheduled_at__gte=now,
+            scheduled_at__lte=three_days,
+        )
+        serializer = self.get_serializer(qs, many=True)
+        return Response(serializer.data)
+
+
+@api_view(["GET", "PATCH"])
+@permission_classes([IsAuthenticated])
+def notification_preferences_view(request: Request) -> Response:
+    """Get or update notification preferences for the current user."""
+    pref, _created = NotificationPreference.objects.get_or_create(user=request.user)
+
+    if request.method == "GET":
+        serializer = NotificationPreferenceSerializer(pref)
+        return Response(serializer.data)
+
+    serializer = NotificationPreferenceSerializer(pref, data=request.data, partial=True)
+    serializer.is_valid(raise_exception=True)
+    serializer.save()
+    return Response(serializer.data)
+
+
+@api_view(["GET"])
+@permission_classes([IsAuthenticated])
+def pace_status_view(request: Request) -> Response:
+    """Get reading pace status for the current user's upcoming meetings."""
+    ebook_id = request.query_params.get("ebook_id")
+    ebook: EBook | None = None
+
+    if ebook_id:
+        try:
+            ebook = EBook.objects.select_related("reading_progress").prefetch_related("chapters").get(
+                pk=ebook_id, user=request.user
+            )
+        except EBook.DoesNotExist:
+            return Response(
+                {"error": "EBook not found."}, status=status.HTTP_404_NOT_FOUND
+            )
+
+    pace_data = calculate_pace(request.user, ebook=ebook)
+    serializer = PaceStatusSerializer(pace_data, many=True)
+    return Response(serializer.data)
+
+
+@api_view(["POST"])
+@permission_classes([IsAuthenticated])
+def dismiss_pace_notification_view(request: Request) -> Response:
+    """Dismiss a pace notification so it won't show again."""
+    meeting_id = request.data.get("meeting_id")
+    ebook_id = request.data.get("ebook_id")
+
+    if not meeting_id or not ebook_id:
+        return Response(
+            {"error": "meeting_id and ebook_id are required."},
+            status=status.HTTP_400_BAD_REQUEST,
+        )
+
+    PaceNotification.objects.filter(
+        user=request.user,
+        meeting_id=meeting_id,
+        ebook_id=ebook_id,
+        status=NotificationStatus.PENDING,
+    ).update(status=NotificationStatus.DISMISSED)
+
+    return Response({"status": "dismissed"})
+
+
+@api_view(["GET"])
+@permission_classes([IsAuthenticated])
+def reminder_view(request: Request) -> Response:
+    """Get pre-meeting reminders for meetings within 24 hours."""
+    pref, _ = NotificationPreference.objects.get_or_create(user=request.user)
+    if not pref.reminder_enabled:
+        return Response([])
+
+    meetings = get_reminder_meetings(request.user)
+    now_dt = __import__("django").utils.timezone.now()
+
+    reminders = []
+    for mtg in meetings:
+        group_ebook = mtg.group.ebook
+        ebook: EBook | None = group_ebook
+        if not ebook:
+            ebooks = list(
+                EBook.objects.filter(reading_groups=mtg.group).select_related("reading_progress")[:1]
+            )
+            ebook = ebooks[0] if ebooks else None
+
+        if not ebook:
+            continue
+
+        hours_until = max(0, int((mtg.scheduled_at - now_dt).total_seconds() / 3600))
+        reminders.append({
+            "meeting_id": mtg.pk,
+            "meeting_title": mtg.title or mtg.target_section_label,
+            "scheduled_at": mtg.scheduled_at.isoformat(),
+            "target_section": mtg.target_section,
+            "target_section_label": mtg.target_section_label,
+            "group_name": mtg.group.name,
+            "hours_until": hours_until,
+            "ebook_id": ebook.pk,
+            "ebook_title": ebook.title,
+        })
+
+    serializer = ReminderSerializer(reminders, many=True)
+    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/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/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

@@ -1,8 +1,11 @@
-from django.urls import include, path
-from rest_framework.routers import DefaultRouter
-from rest_framework_simplejwt.views import TokenObtainPairView, TokenRefreshView
+from django.urls import path
+from rest_framework_simplejwt.views import TokenRefreshView
+
+from apps.users.views import EmailTokenObtainPairView, RegisterView
 
 urlpatterns = [
-    path("token/", TokenObtainPairView.as_view(), name="token_obtain_pair"),
+    path("register/", RegisterView.as_view(), name="register"),
+    path("token/", EmailTokenObtainPairView.as_view(), name="token_obtain_pair"),
+    path("login/", EmailTokenObtainPairView.as_view(), name="login"),
     path("token/refresh/", TokenRefreshView.as_view(), name="token_refresh"),
 ]

backend/apps/users/views.py

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

backend/config/django.py

@@ -40,6 +40,8 @@ INSTALLED_APPS = [
     "apps.users",
     "apps.books",
     "apps.annotations",
+    "apps.reader",
+    "apps.groups",
 ]
 
 MIDDLEWARE = [
@@ -144,7 +146,7 @@ USE_TZ = True
 # ---------------------------------------------------------------------------
 STATIC_URL = "static/"
 STATIC_ROOT = BASE_DIR / "staticfiles"
-MEDIA_URL = "media/"
+MEDIA_URL = "/media/"
 MEDIA_ROOT = BASE_DIR / "media"
 
 # Maximum upload size: 50MB

backend/config/settings.py

@@ -1,6 +1,3 @@
-import os
-from pathlib import Path
-
 from pydantic_settings import BaseSettings
 
 
@@ -29,6 +26,14 @@ class Settings(BaseSettings):
         "http://localhost:3000",
     ]
 
+    # Open Library metadata enrichment
+    OPENLIBRARY_ENABLED: bool = True
+    OPENLIBRARY_PREFERRED_LANG: str = "es"
+    OPENLIBRARY_FALLBACK_LANG: str = "en"
+    OPENLIBRARY_TIMEOUT_SECONDS: float = 10.0
+    OPENLIBRARY_CONNECT_TIMEOUT_SECONDS: float = 15.0
+    OPENLIBRARY_USER_AGENT: str = "CloudReader/1.0 (https://github.com/cloud-reader)"
+
     @property
     def DATABASE_URL(self) -> str:
         return (

backend/config/urls.py

@@ -1,3 +1,4 @@
+from django.conf import settings
 from django.contrib import admin
 from django.urls import include, path
 
@@ -6,4 +7,11 @@ urlpatterns = [
     path("api/auth/", include("apps.users.urls")),
     path("api/books/", include("apps.books.urls")),
     path("api/annotations/", include("apps.annotations.urls")),
+    path("api/reader/", include("apps.reader.urls")),
+    path("api/groups/", include("apps.groups.urls")),
 ]
+
+if settings.DEBUG:
+    from django.conf.urls.static import static
+
+    urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

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",
+]

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@@ -0,0 +1,673 @@
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+    { url = "https://files.pythonhosted.org/packages/ce/e4/dccd7f47c4b64213ac01ef921a1337ee6e30e8c6466046018326977efd95/tzdata-2026.2-py2.py3-none-any.whl", hash = "sha256:bbe9af844f658da81a5f95019480da3a89415801f6cc966806612cc7169bffe7", size = 349321, upload-time = "2026-04-24T15:22:05.876Z" },
+]

docker-compose.yml

@@ -5,9 +5,9 @@ services:
     volumes:
       - postgres_data:/var/lib/postgresql/data
     environment:
-      POSTGRES_DB: cloud_reader
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: ${POSTGRES_DB:-cloud_reader}
+      POSTGRES_USER: ${POSTGRES_USER:-postgres}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
     ports:
       - "5432:5432"
     healthcheck:
@@ -23,16 +23,16 @@ services:
     ports:
       - "8000:8000"
     environment:
-      DJANGO_SECRET_KEY: "dev-secret-key-change-in-production"
-      DJANGO_DEBUG: "True"
-      DB_NAME: cloud_reader
-      DB_USER: postgres
-      DB_PASSWORD: postgres
-      DB_HOST: db
-      DB_PORT: "5432"
+      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
-      - book_media:/app/media
+      - ./backend/media:/app/media
     command: >
       sh -c "python manage.py migrate && python manage.py runserver 0.0.0.0:8000"
     depends_on:
@@ -46,7 +46,7 @@ services:
     ports:
       - "5173:5173"
     environment:
-      VITE_API_URL: "http://localhost:8000"
+      VITE_API_URL: ${VITE_API_URL:-http://localhost:8000}
     volumes:
       - ./frontend:/app
       - /app/node_modules
@@ -55,4 +55,3 @@ services:
 
 volumes:
   postgres_data:
-  book_media:

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

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

docs/backend/search-discovery-spec.md

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

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

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

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

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

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

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

docs/frontend/013-i18n-web.md

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

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

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

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

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

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

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

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/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

@@ -0,0 +1 @@
+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

@@ -0,0 +1 @@
+._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}

frontend/dist/assets/Settings-DkxftMXf.js

@@ -0,0 +1 @@
+import{X as j,h as m,r as i,j as e}from"./index-BQiEVoRj.js";import{b as g}from"./books-BG7wMiRx.js";const S=[{value:"#ffffff",labelKey:"settings.bgWhite"},{value:"#f4e4c1",labelKey:"settings.bgSepia"},{value:"#1a1a2e",labelKey:"settings.bgDark"},{value:"#c7edcc",labelKey:"settings.bgGreen"}];function W(){const{t,language:u,setLanguage:p}=j(),x=m(),[s,a]=i.useState(null),[h,y]=i.useState(!0),[o,c]=i.useState(!1),[f,r]=i.useState(null),[v,d]=i.useState(!1);i.useEffect(()=>{(async()=>{try{const l=await g.getSettings();a(l)}catch(l){r(l instanceof Error?l.message:t("settings.loadFailed"))}finally{y(!1)}})()},[t]);const b=async()=>{if(s){c(!0),r(null),d(!1);try{await g.updateSettings(s),d(!0),setTimeout(()=>d(!1),2e3)}catch(n){r(n instanceof Error?n.message:t("settings.saveFailed"))}finally{c(!1)}}};return h?e.jsx("div",{style:{maxWidth:500,margin:"0 auto",padding:16,minHeight:"100vh",background:"#f8f9fa"},children:e.jsx("p",{children:t("settings.loading")})}):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:()=>x("/"),style:{padding:"8px 16px",borderRadius:6,border:"1px solid #ddd",background:"#fff",cursor:"pointer",fontSize:14},children:["← ",t("common.back")]}),e.jsx("h1",{style:{fontSize:24,fontWeight:700,color:"#1a1a2e",margin:0},children:t("settings.title")})]}),e.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:24},children:[f&&e.jsx("div",{style:{background:"#fde8e8",padding:12,borderRadius:6,color:"#e74c3c",fontSize:14},children:f}),v&&e.jsx("div",{style:{background:"#d4edda",padding:12,borderRadius:6,color:"#155724",fontSize:14},children:t("settings.saved")}),e.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:8},children:[e.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:t("settings.uiLanguage")}),e.jsxs("select",{value:u,onChange:n=>p(n.target.value),style:{padding:"10px 12px",borderRadius:6,border:"1px solid #ddd",fontSize:16,background:"#fff",outline:"none"},children:[e.jsx("option",{value:"en-US",children:t("settings.uiLanguageEn")}),e.jsx("option",{value:"es-ES",children:t("settings.uiLanguageEs")})]})]}),s&&e.jsxs(e.Fragment,{children:[e.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:8},children:[e.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:t("settings.fontSize",{size:String(s.font_size)})}),e.jsx("input",{type:"range",min:12,max:36,value:s.font_size,onChange:n=>a({...s,font_size:Number(n.target.value)}),style:{width:"100%",cursor:"pointer"}}),e.jsxs("div",{style:{display:"flex",justifyContent:"space-between",fontSize:12,color:"#999"},children:[e.jsx("span",{children:"12px"}),e.jsx("span",{children:"36px"})]})]}),e.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:8},children:[e.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:t("settings.fontStyle")}),e.jsxs("select",{value:s.font_style,onChange:n=>a({...s,font_style:n.target.value}),style:{padding:"10px 12px",borderRadius:6,border:"1px solid #ddd",fontSize:16,background:"#fff",outline:"none"},children:[e.jsx("option",{value:"sans-serif",children:t("settings.fontSans")}),e.jsx("option",{value:"serif",children:t("settings.fontSerif")}),e.jsx("option",{value:"monospace",children:t("settings.fontMonospace")})]})]}),e.jsxs("div",{style:{display:"flex",flexDirection:"column",gap:8},children:[e.jsx("label",{style:{fontSize:14,fontWeight:600,color:"#555"},children:t("settings.backgroundColor")}),e.jsx("div",{style:{display:"flex",gap:12,flexWrap:"wrap"},children:S.map(n=>e.jsx("button",{onClick:()=>a({...s,background_color:n.value}),style:{width:48,height:48,borderRadius:"50%",cursor:"pointer",display:"flex",alignItems:"center",justifyContent:"center",background:n.value,border:s.background_color===n.value?"3px solid #1a1a2e":"3px solid #ddd"},title:t(n.labelKey),children:s.background_color===n.value&&e.jsx("span",{style:{fontSize:20,fontWeight:700,color:n.value==="#ffffff"||n.value==="#f4e4c1"?"#1a1a2e":"#fff"},children:"✓"})},n.value))})]})]}),e.jsx("button",{onClick:b,disabled:o,style:{padding:"12px 24px",borderRadius:8,border:"none",background:"#1a1a2e",color:"#fff",fontSize:16,fontWeight:600,cursor:"pointer",opacity:o?.6:1,marginTop:8},children:t(o?"common.saving":"settings.saveSettings")})]})]})}export{W as SettingsPage};

frontend/dist/assets/TableOfContents-BqoUCglr.js

@@ -0,0 +1 @@
+import{X as i,j as e}from"./index-BQiEVoRj.js";function o({item:s,depth:a,onNavigate:t}){var c;return e.jsxs(e.Fragment,{children:[e.jsx("button",{type:"button",className:"toc-item",style:{paddingLeft:`${16+a*14}px`},onClick:()=>t(s.href),children:e.jsx("span",{className:"toc-item-title",children:s.label})}),(c=s.subitems)==null?void 0:c.map(r=>e.jsx(o,{item:r,depth:a+1,onNavigate:t},r.href))]})}function x({items:s,isOpen:a,onClose:t,onNavigate:c}){const{t:r}=i(),l=n=>{c(n),t()};return e.jsxs(e.Fragment,{children:[a&&e.jsx("div",{className:"toc-overlay",onClick:t,onKeyDown:n=>{n.key==="Escape"&&t()},role:"presentation"}),e.jsxs("aside",{className:`toc-drawer ${a?"toc-drawer--open":""}`,children:[e.jsxs("div",{className:"toc-header",children:[e.jsx("h2",{className:"toc-title",children:r("reader.tocTitle")}),e.jsx("button",{type:"button",className:"toc-close-btn",onClick:t,"aria-label":r("reader.closeTocAria"),children:e.jsxs("svg",{width:"20",height:"20",viewBox:"0 0 24 24",fill:"none",stroke:"currentColor",strokeWidth:"2",strokeLinecap:"round",strokeLinejoin:"round",children:[e.jsx("line",{x1:"18",y1:"6",x2:"6",y2:"18"}),e.jsx("line",{x1:"6",y1:"6",x2:"18",y2:"18"})]})})]}),e.jsx("nav",{className:"toc-list",children:s.length===0?e.jsx("p",{className:"toc-empty",children:r("reader.tocEmpty")}):s.map(n=>e.jsx(o,{item:n,depth:0,onNavigate:l},n.href))})]})]})}export{x as default};

frontend/dist/assets/books-BG7wMiRx.js

@@ -0,0 +1 @@
+import{a}from"./index-BQiEVoRj.js";const i={async getEBooks(){const{data:t}=await a.get("/books/ebooks/");return Array.isArray(t)?t:t.results??[]},async getEBook(t){const{data:o}=await a.get(`/books/ebooks/${t}/`);return o},async getEpubFile(t){const{data:o}=await a.get(`/books/ebooks/${t}/file/`,{responseType:"blob"});return o},async searchBooks(t={}){const{data:o}=await a.get("/books/",{params:t});return Array.isArray(o)?{count:o.length,results:o}:{count:o.count??0,results:o.results??[]}},async getBook(t){const{data:o}=await a.get(`/books/${t}/`);return o},async getGenres(){const{data:t}=await a.get("/books/genres/");return t},async getAuthors(){const{data:t}=await a.get("/books/authors/");return t},async uploadEBook(t,o,s,n){const e=new FormData;e.append("file",t),e.append("title",o),s&&e.append("author",s),n&&e.append("cover_image",n);const{data:r}=await a.post("/books/ebooks/",e,{headers:{"Content-Type":"multipart/form-data"}});return r},async deleteEBook(t){await a.delete(`/books/ebooks/${t}/`)},async enrichEBookMetadata(t){const{data:o}=await a.post(`/books/ebooks/${t}/enrich-metadata/`);return o},async processEBook(t){const{data:o}=await a.post(`/books/ebooks/${t}/process/`);return o},async getToc(t){const{data:o}=await a.get(`/books/ebooks/${t}/toc/`);return o},async getContent(t,o){const{data:s}=await a.get(`/books/ebooks/${t}/content/?page=${o}`);return s},async getProgress(t){const{data:o}=await a.get(`/books/ebooks/${t}/progress/`);return o},async updateProgress(t,o){const{data:s}=await a.patch(`/books/ebooks/${t}/progress/`,o);return s},async getSettings(){const{data:t}=await a.get("/books/settings/");return t},async updateSettings(t){const{data:o}=await a.patch("/books/settings/",t);return o}};export{i as b};

frontend/dist/assets/errors-bLl0IgZb.js

@@ -0,0 +1 @@
+import{b as f}from"./index-BQiEVoRj.js";function i(t){if(t==null)return[];if(typeof t=="string")return[t];if(Array.isArray(t))return t.flatMap(i);if(typeof t=="object"){const s=t;if("detail"in s){const e=i(s.detail);if(e.length>0)return e}const r=[];for(const[e,o]of Object.entries(s))if(e!=="detail")for(const n of i(o))r.push(e==="non_field_errors"?n:`${e}: ${n}`);return r}return[]}function g(t,s="Something went wrong"){var r,e;if(f.isAxiosError(t)){const o=(r=t.response)==null?void 0:r.data;if(o!==void 0){const n=i(o);if(n.length>0)return n.join(". ")}return(e=t.response)!=null&&e.status&&t.message.startsWith("Request failed")?s:t.message||s}return t instanceof Error?t.message:s}export{g};

frontend/dist/assets/useMediaQuery-DwhAHSnz.js

@@ -0,0 +1 @@
+import{r as n}from"./index-BQiEVoRj.js";function m(t){const[c,s]=n.useState(!1);return n.useEffect(()=>{const e=window.matchMedia(t);s(e.matches);const a=r=>s(r.matches);return e.addEventListener("change",a),()=>e.removeEventListener("change",a)},[t]),c}const h={md:"(max-width: 768px)"};export{h as B,m as u};

frontend/dist/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Cloud Reader</title>
+    <script type="module" crossorigin src="/assets/index-BQiEVoRj.js"></script>
+    <link rel="stylesheet" crossorigin href="/assets/index-Bc1rr75j.css">
+  </head>
+  <body>
+    <div id="root"></div>
+  </body>
+</html>

frontend/package.json

@@ -11,20 +11,23 @@
     "lint": "eslint ."
   },
   "dependencies": {
+    "axios": "^1.7.9",
+    "react-router-dom": "^7.1.0",
+    "pdfjs-dist": "^4.10.38",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "react-router-dom": "^7.1.0",
-    "axios": "^1.7.9"
+    "react-i18n-lite": "^1.0.10",
+    "react-reader": "^2.0.15"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.6.3",
+    "@testing-library/react": "^16.2.0",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
     "@vitejs/plugin-react": "^4.3.4",
+    "jsdom": "^25.0.0",
     "typescript": "~5.7.0",
     "vite": "^6.0.0",
-    "vitest": "^2.1.0",
-    "@testing-library/react": "^16.2.0",
-    "@testing-library/jest-dom": "^6.6.3",
-    "jsdom": "^25.0.0"
+    "vitest": "^2.1.0"
   }
 }

frontend/src/App.tsx

@@ -1,24 +1,23 @@
-import React, { lazy, Suspense, useState } from "react";
-import { BrowserRouter, Navigate, Route, Routes } from "react-router-dom";
+import React, { lazy, Suspense } from "react";
+import { BrowserRouter, Navigate, Route, Routes, useParams } from "react-router-dom";
 import { AuthProvider, useAuth } from "./context/AuthContext";
+import { I18nProvider } from "./i18n/I18nProvider";
+import { ToastProvider } from "./hooks/useToast";
+import { AnnotationsProvider } from "./context/AnnotationsContext";
+import { useTranslation } from "react-i18n-lite";
 
 const LibraryPage = lazy(() => import("./pages/Library").then((m) => ({ default: m.LibraryPage })));
-const ReaderPage = lazy(() => import("./pages/Reader").then((m) => ({ default: m.ReaderPage })));
+const BookDetailPage = lazy(() => import("./pages/BookDetailPage").then((m) => ({ default: m.BookDetailPage })));
 const AddBookPage = lazy(() => import("./pages/AddBook").then((m) => ({ default: m.AddBookPage })));
 const SettingsPage = lazy(() => import("./pages/Settings").then((m) => ({ default: m.SettingsPage })));
 const BookmarksNotesPage = lazy(() => import("./components/annotations/BookmarksNotesPage").then((m) => ({ default: m.BookmarksNotesPage })));
+const ReadingPage = lazy(() => import("./pages/ReadingPage").then((m) => ({ default: m.default })));
 
-const AuthPage = lazy(() =>
-  import("./pages/AuthPage").then((m) => ({
-    default: () => {
-      const [isLogin, setIsLogin] = useState(true);
-      return isLogin ? <m.LoginPage onToggle={() => setIsLogin(false)} /> : <m.RegisterPage onToggle={() => setIsLogin(true)} />;
-    },
-  })),
-);
+const AuthPage = lazy(() => import("./pages/AuthPage"));
 
 function LoadingFallback() {
-  return <div style={{ display: "flex", justifyContent: "center", alignItems: "center", minHeight: "100vh", color: "#888", fontSize: 16 }}><p>Loading...</p></div>;
+  const { t } = useTranslation();
+  return <div style={{ display: "flex", justifyContent: "center", alignItems: "center", minHeight: "100vh", color: "#888", fontSize: 16 }}><p>{t("common.loading")}</p></div>;
 }
 
 function ProtectedRoute({ children }: { children: React.ReactNode }) {
@@ -28,6 +27,11 @@ function ProtectedRoute({ children }: { children: React.ReactNode }) {
   return <>{children}</>;
 }
 
+function ReaderRedirect() {
+  const { id } = useParams<{ id: string }>();
+  return <Navigate to={`/read/${id ?? ""}`} replace />;
+}
+
 function AppRoutes() {
   const { isAuthenticated } = useAuth();
   return (
@@ -35,7 +39,9 @@ function AppRoutes() {
       <Routes>
         <Route path="/auth" element={isAuthenticated ? <Navigate to="/" replace /> : <AuthPage />} />
         <Route path="/" element={<ProtectedRoute><LibraryPage /></ProtectedRoute>} />
-        <Route path="/reader/:id" element={<ProtectedRoute><ReaderPage /></ProtectedRoute>} />
+        <Route path="/books/:id" element={<ProtectedRoute><BookDetailPage /></ProtectedRoute>} />
+        <Route path="/read/:id" element={<ProtectedRoute><ReadingPage /></ProtectedRoute>} />
+        <Route path="/reader/:id" element={<ProtectedRoute><ReaderRedirect /></ProtectedRoute>} />
         <Route path="/add" element={<ProtectedRoute><AddBookPage /></ProtectedRoute>} />
         <Route path="/settings" element={<ProtectedRoute><SettingsPage /></ProtectedRoute>} />
         <Route path="/bookmarks-notes/:bookId?" element={<ProtectedRoute><BookmarksNotesPage /></ProtectedRoute>} />
@@ -48,9 +54,15 @@ function AppRoutes() {
 export default function App() {
   return (
     <BrowserRouter>
+      <I18nProvider>
         <AuthProvider>
+          <ToastProvider>
+            <AnnotationsProvider>
               <AppRoutes />
+            </AnnotationsProvider>
+          </ToastProvider>
         </AuthProvider>
+      </I18nProvider>
     </BrowserRouter>
   );
 }

frontend/src/api/annotations.ts

@@ -1,96 +1,29 @@
 import api from "@/api/client";
 import type {
   Bookmark,
-  CreateBookmarkPayload,
-  Note,
-  CreateNotePayload,
-  UpdateNotePayload,
+  CreateMarkerPayload,
   PaginatedResponse,
 } from "@/types";
 
-/** Fetch bookmarks for the current user, optionally filtered by book */
 export async function fetchBookmarks(
-  bookId?: string
+  ebookId?: string | number,
 ): Promise<PaginatedResponse<Bookmark>> {
   const params: Record<string, string> = {};
-  if (bookId) params.book = bookId;
+  if (ebookId != null && ebookId !== "") params.ebook = String(ebookId);
   const { data } = await api.get<PaginatedResponse<Bookmark>>(
     "/annotations/bookmarks/",
-    { params }
+    { params },
   );
   return data;
 }
 
-/** Create a new bookmark */
-export async function createBookmark(
-  payload: CreateBookmarkPayload
+export async function createMarker(
+  payload: CreateMarkerPayload,
 ): Promise<Bookmark> {
-  const { data } = await api.post<Bookmark>(
-    "/annotations/bookmarks/",
-    payload
-  );
+  const { data } = await api.post<Bookmark>("/annotations/bookmarks/", payload);
   return data;
 }
 
-/** Delete a bookmark by id */
 export async function deleteBookmark(id: string): Promise<void> {
   await api.delete(`/annotations/bookmarks/${id}/`);
 }
-
-/** Batch delete bookmarks */
-export async function batchDeleteBookmarks(
-  ids: string[]
-): Promise<{ deleted: number }> {
-  const { data } = await api.delete<{ deleted: number }>(
-    "/annotations/bookmarks/batch-delete/",
-    { data: { ids } }
-  );
-  return data;
-}
-
-/** Fetch notes for the current user, optionally filtered by book */
-export async function fetchNotes(
-  bookId?: string
-): Promise<PaginatedResponse<Note>> {
-  const params: Record<string, string> = {};
-  if (bookId) params.book = bookId;
-  const { data } = await api.get<PaginatedResponse<Note>>(
-    "/annotations/notes/",
-    { params }
-  );
-  return data;
-}
-
-/** Create a new note */
-export async function createNote(payload: CreateNotePayload): Promise<Note> {
-  const { data } = await api.post<Note>("/annotations/notes/", payload);
-  return data;
-}
-
-/** Update a note's content */
-export async function updateNote(
-  id: string,
-  payload: UpdateNotePayload
-): Promise<Note> {
-  const { data } = await api.patch<Note>(
-    `/annotations/notes/${id}/`,
-    payload
-  );
-  return data;
-}
-
-/** Delete a note by id */
-export async function deleteNote(id: string): Promise<void> {
-  await api.delete(`/annotations/notes/${id}/`);
-}
-
-/** Batch delete notes */
-export async function batchDeleteNotes(
-  ids: string[]
-): Promise<{ deleted: number }> {
-  const { data } = await api.delete<{ deleted: number }>(
-    "/annotations/notes/batch-delete/",
-    { data: { ids } }
-  );
-  return data;
-}

frontend/src/api/books.ts

@@ -1,10 +1,21 @@
 import api from "./client";
-import type { EBookDetail, EBookListItem, ReadingProgress, ReadingSettings } from "../types/book";
+import type {
+  BookDetail,
+  BookListItem,
+  BookSearchParams,
+  ContentResponse,
+  EBookDetail,
+  EBookListItem,
+  ReadingProgress,
+  ReadingSettings,
+  TocResponse,
+} from "../types/book";
 
 export const booksApi = {
   async getEBooks(): Promise<EBookListItem[]> {
-    const { data } = await api.get<EBookListItem[]>("/books/ebooks/");
-    return data;
+    const { data } = await api.get<{ count: number; results: EBookListItem[] } | EBookListItem[]>("/books/ebooks/");
+    if (Array.isArray(data)) return data;
+    return data.results ?? [];
   },
 
   async getEBook(id: number): Promise<EBookDetail> {
@@ -12,6 +23,53 @@ export const booksApi = {
     return data;
   },
 
+  async getEbookFile(id: number): Promise<Blob> {
+    const { data } = await api.get<Blob>(`/books/ebooks/${id}/file/`, {
+      responseType: "blob",
+    });
+    return data;
+  },
+
+  async getEpubFile(id: number): Promise<Blob> {
+    const { data } = await api.get<Blob>(`/books/ebooks/${id}/file/`, {
+      responseType: "blob",
+    });
+    return data;
+  },
+
+  async searchBooks(params: BookSearchParams = {}): Promise<{ count: number; results: BookListItem[] }> {
+    const { data } = await api.get<{ count: number; results: BookListItem[] } | BookListItem[]>("/books/", { params });
+    if (Array.isArray(data)) {
+      return { count: data.length, results: data };
+    }
+    return { count: data.count ?? 0, results: data.results ?? [] };
+  },
+
+  async getBook(id: number): Promise<BookDetail> {
+    const { data } = await api.get<BookDetail>(`/books/${id}/`);
+    return data;
+  },
+
+  async getGenres(): Promise<string[]> {
+    const { data } = await api.get<string[]>("/books/ebooks/genres/");
+    return data;
+  },
+
+  async getAuthors(): Promise<string[]> {
+    const { data } = await api.get<string[]>("/books/ebooks/authors/");
+    return data;
+  },
+
+  async searchEBooks(params: { q: string; page_size?: number }): Promise<EBookListItem[]> {
+    const { data } = await api.get<{ count: number; results: EBookListItem[] } | EBookListItem[]>(
+      "/books/ebooks/",
+      { params: { q: params.q.trim() } },
+    );
+    const items = Array.isArray(data) ? data : data.results ?? [];
+    const limit = params.page_size ?? items.length;
+    return items.slice(0, limit);
+  },
+
   async uploadEBook(
     file: File,
     title: string,
@@ -34,6 +92,26 @@ export const booksApi = {
     await api.delete(`/books/ebooks/${id}/`);
   },
 
+  async enrichEBookMetadata(id: number): Promise<EBookDetail> {
+    const { data } = await api.post<EBookDetail>(`/books/ebooks/${id}/enrich-metadata/`);
+    return data;
+  },
+
+  async processEBook(id: number): Promise<{ status: string }> {
+    const { data } = await api.post<{ status: string }>(`/books/ebooks/${id}/process/`);
+    return data;
+  },
+
+  async getToc(id: number): Promise<TocResponse> {
+    const { data } = await api.get<TocResponse>(`/books/ebooks/${id}/toc/`);
+    return data;
+  },
+
+  async getContent(id: number, page: number): Promise<ContentResponse> {
+    const { data } = await api.get<ContentResponse>(`/books/ebooks/${id}/content/?page=${page}`);
+    return data;
+  },
+
   async getProgress(ebookId: number): Promise<ReadingProgress> {
     const { data } = await api.get<ReadingProgress>(`/books/ebooks/${ebookId}/progress/`);
     return data;

frontend/src/api/client.ts

@@ -56,7 +56,7 @@ api.interceptors.response.use(
     } catch {
       localStorage.removeItem("access_token");
       localStorage.removeItem("refresh_token");
-      window.location.href = "/login";
+      window.location.href = "/auth";
       return Promise.reject(error);
     } finally {
       isRefreshing = false;

frontend/src/api/errors.ts

@@ -0,0 +1,40 @@
+import axios from "axios";
+
+function messagesFromValue(value: unknown): string[] {
+  if (value == null) return [];
+  if (typeof value === "string") return [value];
+  if (Array.isArray(value)) return value.flatMap(messagesFromValue);
+  if (typeof value === "object") {
+    const record = value as Record<string, unknown>;
+    if ("detail" in record) {
+      const fromDetail = messagesFromValue(record.detail);
+      if (fromDetail.length > 0) return fromDetail;
+    }
+    const messages: string[] = [];
+    for (const [key, nested] of Object.entries(record)) {
+      if (key === "detail") continue;
+      for (const part of messagesFromValue(nested)) {
+        messages.push(key === "non_field_errors" ? part : `${key}: ${part}`);
+      }
+    }
+    return messages;
+  }
+  return [];
+}
+
+/** Extract human-readable message(s) from a Django REST Framework / axios error response. */
+export function getApiErrorMessage(err: unknown, fallback = "Something went wrong"): string {
+  if (axios.isAxiosError(err)) {
+    const data = err.response?.data;
+    if (data !== undefined) {
+      const messages = messagesFromValue(data);
+      if (messages.length > 0) return messages.join(". ");
+    }
+    if (err.response?.status && err.message.startsWith("Request failed")) {
+      return fallback;
+    }
+    return err.message || fallback;
+  }
+  if (err instanceof Error) return err.message;
+  return fallback;
+}

frontend/src/api/groups.ts

@@ -0,0 +1,57 @@
+import api from "./client";
+import type {
+  GroupMeeting,
+  MeetingReminder,
+  NotificationPreferences,
+  PaceStatus,
+  ReadingGroup,
+} from "../types/notifications";
+
+export const groupsApi = {
+  async getPaceStatus(ebookId?: number): Promise<PaceStatus[]> {
+    const params: Record<string, string> = {};
+    if (ebookId) params.ebook_id = String(ebookId);
+    const { data } = await api.get<PaceStatus[]>("/groups/notifications/pace/", { params });
+    return data;
+  },
+
+  async getPreferences(): Promise<NotificationPreferences> {
+    const { data } = await api.get<NotificationPreferences>("/groups/notifications/preferences/");
+    return data;
+  },
+
+  async updatePreferences(
+    prefs: Partial<NotificationPreferences>,
+  ): Promise<NotificationPreferences> {
+    const { data } = await api.patch<NotificationPreferences>(
+      "/groups/notifications/preferences/",
+      prefs,
+    );
+    return data;
+  },
+
+  async dismissPaceNotification(meetingId: number, ebookId: number): Promise<void> {
+    await api.post("/groups/notifications/dismiss/", {
+      meeting_id: meetingId,
+      ebook_id: ebookId,
+    });
+  },
+
+  async getReminders(): Promise<MeetingReminder[]> {
+    const { data } = await api.get<MeetingReminder[]>("/groups/notifications/reminders/");
+    return data;
+  },
+
+  async getGroups(): Promise<ReadingGroup[]> {
+    const { data } = await api.get<{ count: number; results: ReadingGroup[] } | ReadingGroup[]>(
+      "/groups/groups/",
+    );
+    if (Array.isArray(data)) return data;
+    return data.results ?? [];
+  },
+
+  async getUpcomingMeetings(): Promise<GroupMeeting[]> {
+    const { data } = await api.get<GroupMeeting[]>("/groups/meetings/upcoming/");
+    return data;
+  },
+};

frontend/src/api/loadEbookWithProgress.ts

@@ -0,0 +1,14 @@
+import { booksApi } from "@/api/books";
+import { getReadingProgress } from "@/api/reader";
+import type { ReadingProgress } from "@/types/reader";
+
+export async function loadEbookWithProgress(bookId: number): Promise<{
+  progressData: ReadingProgress | null;
+  blob: Blob;
+}> {
+  const [progressData, blob] = await Promise.all([
+    getReadingProgress(bookId).catch(() => null),
+    booksApi.getEbookFile(bookId),
+  ]);
+  return { progressData, blob };
+}

frontend/src/api/reader.ts

@@ -0,0 +1,70 @@
+/**
+ * API client for the reader module — reading settings and progress.
+ * Uses the shared axios client so JWT auth is attached automatically.
+ */
+
+import api from "./client";
+import type { ReadingProgress, ReadingSettings } from "../types/reader";
+
+export async function getReadingSettings(): Promise<ReadingSettings> {
+  const { data } = await api.get<ReadingSettings>("/reader/settings/");
+  return data;
+}
+
+export async function updateReadingSettings(
+  settings: Partial<ReadingSettings>,
+): Promise<ReadingSettings> {
+  const { data } = await api.patch<ReadingSettings>("/reader/settings/", settings);
+  return data;
+}
+
+export async function getReadingProgress(
+  bookId: number,
+): Promise<ReadingProgress> {
+  const { data } = await api.get<{
+    current_position: number;
+    last_page: number;
+    epub_location?: string;
+    updated_at?: string;
+  }>(`/books/ebooks/${bookId}/progress/`);
+  return {
+    id: bookId,
+    book: bookId,
+    current_chapter: data.last_page || 1,
+    current_position: data.current_position ?? 0,
+    percentage: data.current_position ?? 0,
+    epub_location: data.epub_location ?? "",
+    updated_at: data.updated_at ?? "",
+  };
+}
+
+export async function updateReadingProgress(
+  bookId: number,
+  progress: Partial<ReadingProgress>,
+): Promise<ReadingProgress> {
+  const body: Record<string, string | number> = {};
+  if (progress.percentage !== undefined || progress.current_position !== undefined) {
+    body.current_position = progress.percentage ?? progress.current_position ?? 0;
+  }
+  if (progress.current_chapter !== undefined) {
+    body.last_page = progress.current_chapter;
+  }
+  if (progress.epub_location !== undefined) {
+    body.epub_location = progress.epub_location;
+  }
+  const { data } = await api.patch<{
+    current_position: number;
+    last_page: number;
+    epub_location?: string;
+    updated_at?: string;
+  }>(`/books/ebooks/${bookId}/progress/`, body);
+  return {
+    id: bookId,
+    book: bookId,
+    current_chapter: data.last_page || 1,
+    current_position: data.current_position ?? 0,
+    percentage: data.current_position ?? 0,
+    epub_location: data.epub_location ?? "",
+    updated_at: data.updated_at ?? "",
+  };
+}

frontend/src/components/BookContextMenu.module.css

@@ -0,0 +1,51 @@
+.menu {
+  position: fixed;
+  z-index: 9999;
+  min-width: 180px;
+  background: #fff;
+  border: 1px solid #e5e7eb;
+  border-radius: 8px;
+  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
+  padding: 4px 0;
+  overflow: hidden;
+}
+
+.item {
+  display: block;
+  width: 100%;
+  padding: 10px 16px;
+  border: none;
+  background: transparent;
+  text-align: left;
+  font-size: 14px;
+  color: #374151;
+  cursor: pointer;
+  transition: background 0.1s;
+}
+
+.item:hover:not(:disabled) {
+  background: #f3f4f6;
+}
+
+.item:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.itemDanger {
+  color: #dc2626;
+}
+
+.itemDanger:hover:not(:disabled) {
+  background: #fef2f2;
+}
+
+.itemLoading {
+  color: #6b7280;
+}
+
+.separator {
+  height: 1px;
+  background: #e5e7eb;
+  margin: 4px 0;
+}

frontend/src/components/BookContextMenu.tsx

@@ -0,0 +1,163 @@
+import { useEffect, useLayoutEffect, useRef, useState } from "react";
+import { useTranslation } from "react-i18n-lite";
+import { booksApi } from "../api/books";
+import { getApiErrorMessage } from "../api/errors";
+import { useToast } from "../hooks/useToast";
+import type { BookListItem } from "../types/book";
+import type { SupportedLanguage } from "../locales";
+import { subjectsFromMetadata } from "../utils/ebookLibrary";
+import styles from "./BookContextMenu.module.css";
+
+type LibraryBook = BookListItem & {
+  format: string;
+  progressPercent: number | null;
+  subjects: string[];
+};
+
+interface BookContextMenuProps {
+  book: LibraryBook;
+  x: number;
+  y: number;
+  onClose: () => void;
+  onBookUpdated: (book: LibraryBook) => void;
+  onBookRemoved: (id: number) => void;
+}
+
+type ActionKind = "sync" | "remove" | null;
+
+function clampPosition(x: number, y: number, width: number, height: number) {
+  const padding = 8;
+  const maxX = window.innerWidth - width - padding;
+  const maxY = window.innerHeight - height - padding;
+  return {
+    left: Math.max(padding, Math.min(x, maxX)),
+    top: Math.max(padding, Math.min(y, maxY)),
+  };
+}
+
+export function BookContextMenu({
+  book,
+  x,
+  y,
+  onClose,
+  onBookUpdated,
+  onBookRemoved,
+}: BookContextMenuProps) {
+  const { t, language } = useTranslation();
+  const locale = language as SupportedLanguage;
+  const { showToast } = useToast();
+  const menuRef = useRef<HTMLDivElement>(null);
+  const [position, setPosition] = useState({ left: x, top: y });
+  const [activeAction, setActiveAction] = useState<ActionKind>(null);
+
+  useLayoutEffect(() => {
+    const el = menuRef.current;
+    if (!el) return;
+    setPosition(clampPosition(x, y, el.offsetWidth, el.offsetHeight));
+  }, [x, y]);
+
+  useEffect(() => {
+    const handlePointerDown = (e: MouseEvent) => {
+      if (menuRef.current && !menuRef.current.contains(e.target as Node)) {
+        onClose();
+      }
+    };
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === "Escape") onClose();
+    };
+    const handleScroll = () => onClose();
+
+    document.addEventListener("mousedown", handlePointerDown);
+    document.addEventListener("keydown", handleKeyDown);
+    window.addEventListener("scroll", handleScroll, true);
+
+    return () => {
+      document.removeEventListener("mousedown", handlePointerDown);
+      document.removeEventListener("keydown", handleKeyDown);
+      window.removeEventListener("scroll", handleScroll, true);
+    };
+  }, [onClose]);
+
+  const handleSyncMetadata = async () => {
+    setActiveAction("sync");
+    try {
+      const updated = await booksApi.enrichEBookMetadata(book.id);
+      const subjects = subjectsFromMetadata(updated.metadata, locale);
+      onBookUpdated({
+        ...book,
+        id: updated.id,
+        title: updated.title,
+        author: updated.author,
+        subjects,
+        genre: subjects[0] ?? "",
+        format: updated.format,
+        cover_image: updated.cover_image,
+        progressPercent: book.progressPercent,
+      });
+
+      const status = updated.metadata?.match_status;
+      if (status === "matched") {
+        showToast({ message: t("toast.metadataSynced", { title: updated.title }), variant: "success" });
+      } else if (status === "not_found") {
+        showToast({ message: t("toast.noMatch"), variant: "warning" });
+      } else {
+        showToast({ message: t("toast.refreshDone"), variant: "success" });
+      }
+    } catch (err) {
+      showToast({ message: getApiErrorMessage(err, t("common.unknownError")), variant: "error" });
+    } finally {
+      setActiveAction(null);
+      onClose();
+    }
+  };
+
+  const handleRemove = async () => {
+    const confirmed = window.confirm(t("contextMenu.confirmRemove", { title: book.title }));
+    if (!confirmed) return;
+
+    setActiveAction("remove");
+    try {
+      await booksApi.deleteEBook(book.id);
+      onBookRemoved(book.id);
+      showToast({ message: t("toast.removed", { title: book.title }), variant: "success" });
+    } catch (err) {
+      showToast({ message: getApiErrorMessage(err, t("common.unknownError")), variant: "error" });
+    } finally {
+      setActiveAction(null);
+      onClose();
+    }
+  };
+
+  const busy = activeAction !== null;
+
+  return (
+    <div
+      ref={menuRef}
+      className={styles.menu}
+      style={{ left: position.left, top: position.top }}
+      role="menu"
+      onClick={(e) => e.stopPropagation()}
+      onContextMenu={(e) => e.preventDefault()}
+    >
+      <button
+        type="button"
+        className={`${styles.item} ${activeAction === "sync" ? styles.itemLoading : ""}`}
+        role="menuitem"
+        disabled={busy}
+        onClick={() => void handleSyncMetadata()}
+      >
+        {activeAction === "sync" ? t("contextMenu.syncingMetadata") : t("contextMenu.syncMetadata")}
+      </button>
+      <div className={styles.separator} role="separator" />
+      <button
+        type="button"
+        className={`${styles.item} ${styles.itemDanger} ${activeAction === "remove" ? styles.itemLoading : ""}`}
+        role="menuitem"
+        disabled={busy}
+        onClick={() => void handleRemove()}
+      >
+        {activeAction === "remove" ? t("contextMenu.removing") : t("contextMenu.remove")}
+      </button>
+    </div>
+  );
+}

frontend/src/components/ToastContainer.module.css

@@ -0,0 +1,50 @@
+.container {
+  position: fixed;
+  bottom: 24px;
+  right: 24px;
+  z-index: 10000;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  pointer-events: none;
+  max-width: min(360px, calc(100vw - 32px));
+}
+
+.toast {
+  pointer-events: auto;
+  padding: 12px 16px;
+  border-radius: 8px;
+  font-size: 14px;
+  line-height: 1.4;
+  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
+  animation: slideIn 0.2s ease-out;
+}
+
+.success {
+  background: #ecfdf5;
+  color: #065f46;
+  border: 1px solid #a7f3d0;
+}
+
+.error {
+  background: #fef2f2;
+  color: #991b1b;
+  border: 1px solid #fecaca;
+}
+
+.warning {
+  background: #fffbeb;
+  color: #92400e;
+  border: 1px solid #fde68a;
+}
+
+@keyframes slideIn {
+  from {
+    opacity: 0;
+    transform: translateY(8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}

frontend/src/components/ToastContainer.tsx

@@ -0,0 +1,20 @@
+import type { ToastItem } from "../hooks/useToast";
+import styles from "./ToastContainer.module.css";
+
+interface ToastContainerProps {
+  toasts: ToastItem[];
+}
+
+export function ToastContainer({ toasts }: ToastContainerProps) {
+  if (toasts.length === 0) return null;
+
+  return (
+    <div className={styles.container} role="status" aria-live="polite">
+      {toasts.map((toast) => (
+        <div key={toast.id} className={`${styles.toast} ${styles[toast.variant]}`}>
+          {toast.message}
+        </div>
+      ))}
+    </div>
+  );
+}

frontend/src/components/annotations/AddAnnotationForm.tsx

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

frontend/src/components/annotations/AnnotationsDashboard.tsx

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