Validation

Constrain selectable dates with DatePickerRule and surface errors through Field.

Min and max bounds apply on blur and when completing segmented input. Mirror the same bounds on appearance.min_date / appearance.max_date so the calendar disables out-of-range days before the user commits an invalid value.

• Booking or scheduling forms with policy date windows
• Admin tools that must reject dates outside a fiscal or contract period
• Any labeled field where validation messages should appear below the control

• Define min and max as Signal<Option<OrbitalDateTime>>.
• Attach rules on DatePickerBind: DatePickerRule::min_date(min) and DatePickerRule::max_date(max).
• Pass the same signals to appearance.min_date and appearance.max_date on the picker.
• Wrap the picker in Field with a stable name for accessible error association.