Created comprehensive user details page at /admin/utilisateurs/[id] that
displays contact information, personal data, account status, and ticket
statistics. Added getUserById method to admin service to fetch detailed
user information from the backend API. Fixes the "Détails" button that
was previously navigating to a non-existent page.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
