feat: bookmarks and notes management

- Backend: Django REST Framework API with Bookmark and Note models
  - ViewSets with user-scoped querysets and select_related for N+1 prevention
  - Create/List/Detail/Update/Delete endpoints
  - Batch delete operations
  - Unique constraint on user+book+page for bookmarks
  - IsOwner permission class for object-level access control
  - Full serializer validation (page > 0, non-empty content, duplicate check)
  - 30+ pytest-django tests covering CRUD, auth, filtering, edge cases

- Frontend: React TypeScript components
  - AnnotationsContext with useReducer for state management
  - BookmarkList, NoteList, AddAnnotationForm, AnnotationsDashboard
  - Inline note editing with immediate save
  - Batch delete support
  - API client with JWT auto-refresh interceptors
  - Paginated query hook for infinite scroll support
  - Responsive CSS with loading/empty states

- Infrastructure: Django project with custom User model, JWT auth, CORS
  - PostgreSQL database models with proper FK and indexes
  - Django admin configuration for all models

README.md

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