Polish dialog/alert surfaces and unauthenticated provider banner (#3016)

Co-authored-by: ss <ss@barekey.dev>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
238715fd6fJulius Marminge committed on 6/10/2026, 12:52:16 AM· committed by GitHubparentb03bc4b
8 files changedLine totals unavailable