deleteWithUndo in ux.js: onDelete ausführen, Undo-Toast anzeigen. Birthdays migriert; Contacts/Notes/Meals haben bereits optimistische Undo-Logik.
Replace all — with - in all source files (JS, CSS, HTML, JSON, Markdown) for consistency and readability. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>