Replaced sticky full-bleed bar with a regular card-style row,
matching the form card width and adding mt-4 top margin.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Backend: new POST /api/persons endpoint in PersonController
- Frontend: new /persons/new route with Vorname/Nachname/Alias form,
redirects to the new person's detail page on success
- Persons list: subtle '+ Neue Person' link below the page title
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>