Block direct URL navigation to /persons/new, /documents/new,
/documents/:id/edit for users without WRITE_ALL permission.
E2E tests verify admin user retains access to all write routes.
Closes#17
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>