Extend validation regex to include Latin Extended Unicode range (\u00C0-\u024F) covering é, è, à, ü, ö, etc. in backend and frontend. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Extend validation regex to include Latin Extended Unicode range (\u00C0-\u024F) covering é, è, à, ü, ö, etc. in backend and frontend. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>