Added
- Selectable week start (#484, #465). Settings → Modules → Calendar → View now lets the household choose whether the week begins on Monday, Sunday, or Saturday. The month grid, week view, and their navigation all follow the choice; a segmented control shows a live weekday-order preview and saves instantly. The displayed ISO week number stays Monday-based, per ISO 8601.
Changed
- The calendar's default appointment duration now saves instantly when you pick a value, consistent with the new week-start control — the separate "Save" button is gone.
Fixed
- The segmented controls in Settings (theme switch and week start) now show a visible keyboard focus ring for keyboard and assistive-technology users.