📚 BookCard

Public Endpoints

• GET /api/card/:isbn - Get card data (with optional ?publisher_id=...)
• GET /api/card/:isbn/image - Get book cover image
• GET /:shortId - Short link redirect

Protected Endpoints (Auth Required)

• GET /api/me - Get current publisher
• GET /api/settings - Get affiliate settings
• PUT /api/settings - Update affiliate settings
• GET /api/books - List publisher's books
• POST /api/books - Add book to library
• PUT /api/books/:isbn - Update book customization
• DELETE /api/books/:isbn - Remove book from library
• POST /api/books/lookup - Lookup book by ISBN/URL