- expand.ts: add reminderIsCustom:boolean to CalendarOccurrence interface;
derived from classifyValarms kind==='custom'; propagated to both
non-recurring and recurring occurrence branches
- client.ts: mirror reminderIsCustom on CalendarOccurrence (atomic mirror)
- EventForm.tsx: extend deriveReminderValue to accept isCustom flag;
returns '__custom__' when true, making the existing D-08 preserve branch
live — editing a custom-alarm event now omits reminderLeadMinutes from
the payload so outboxWorker extractValarms keeps the original VALARM
- Fix existing test fixtures (EventForm.test.tsx, EventDetailPopover.test.tsx)
to include reminderIsCustom:false on all CalendarOccurrence literals
Fixes CAL-14 Pitfall 1: Apple Calendar absolute DATE-TIME / multi-VALARM
alarms no longer silently stripped on any edit round-trip from the PWA.
Lucas Berger
f6b47ebf1e