Full-stack backend project with user roles: Admin, Librarian, Publisher, Reader.

• ✔️ Custom role-based access control (RBAC) with inherited permissions
• ✔️ Two registration flows: Publisher and Reader
• ✔️ Admin panel to manage user roles
• ✔️ Passwords hashed with random hashing algorithm (4 variants)
• ✔️ CSRF protection, form validation, i18n, and error handling

🔧 Stack: Spring Boot, Spring Security, PostgreSQL, JPA, Thymeleaf, Bootstrap