When editing an event in a special-dates calendar, the title, all-day/date and
recurrence are locked (the sync overwrites them) while reminders, location, notes
and colour stay editable — the field-level "managed" contract from the design.
- EventEditUiState.isManaged (calendar id ∈ managedCalendarIds while editing),
wired through the ViewModel's state combine.
- InlineTextField/InlineField gain an `enabled` flag (dims + goes read-only);
ScheduleRow dims and disables its date/time taps; the all-day switch and the
recurrence card are disabled.
- A one-line "Managed by …" hint under the title explains what's editable.
The calendar picker needs no change — it's already create-only, and managed
events are always edits.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jean-Luc Makiola
4da9abe05b