The repeat control is becoming three answers — never, forever, or after a
delay — and in the last two the form can work the cadence out from dates
the reader has already given. Both reduce to one question: which unit and
interval steps from the anchor to the instant the next occurrence should
open. Forever passes the instant this one closes; a delay pushes it out.
Searched with addUnits rather than divided out of a millisecond span,
because a month is not a fixed number of days and a week across a DST
transition is 167 or 169 hours. Largest honest unit wins, so 1 July to
1 August is "every month" rather than "every 31 days", which would drift
out of step by February.
repeatModeOf derives which state a saved rule is in rather than storing it,
since "forever" and "a delay of zero" are the same rule and remembering
which button produced it would change nothing about a single occurrence.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
