REST API and web UI for secure URL shortening.
- ✔️ Full CRUD with password protection and validation
- ✔️ Redirect endpoint + stats tracking in H2
- ✔️ i18n in English, Polish, and German
- ✔️ View + API unified validations with clear messages
🔧 Stack: Spring Boot, Spring MVC, Thymeleaf, H2, Bootstrap