The browser's native prompt() chain was awkward and made it impossible to clear the bezeichnung in a single, predictable flow. The new modal mirrors the user-management dialog: it shows the provider read-only, lets you edit nummer and bezeichnung, and exposes the aktiv flag explicitly. Empty bezeichnung now correctly clears the field. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>