- Added a new profile page (my_profil.html) for users to manage their events and personal information.
- Introduced a new CSS file (my_profil.css) for styling the profile page.
- Created a JavaScript file (my_profil.js) to handle profile data retrieval, event registration management, and form submission.
- Updated navigation logic (navigation.js) to dynamically display login/signup or event management links based on user authentication status.
- Enhanced event creation and detail pages to support user-specific actions (registration/unregistration).
- Improved login and signup processes to handle user data more robustly, including fallback user creation.
- Refactored event overview to show user-specific events and registrations.
- Added error handling and validation for user input in profile management.
