{"message": "Bookstore backend is running", "endpoints": {"health": "/health/", "auth_register": "/api/auth/register/", "auth_login": "/api/auth/login/", "auth_me": "/api/auth/me/", "auth_logout": "/api/auth/logout/", "inventory": "/api/inventory/", "suppliers": "/api/suppliers/", "sales_create_bill": "/api/sales/create-bill/", "sales_today": "/api/sales/today/", "sales_all": "/api/sales/all/", "dashboard_stats": "/api/dashboard/stats/"}}