The start page read every reminder due before the end of the day, so a
daily weigh-in at 20:00 or a twice-daily blood-pressure course showed
"check-up due" from the morning on and took a pinned place on the rail.
`holdsOpenAfterReminder` is now the one definition of a reminder that
stays due after it is sent: an interval longer than seven days, a rule
whose next gap is longer than seven days, a rule with no occurrence
left, or no cadence; never an appointment. The tick uses it to decide
whether a delivered reminder rolls on, and the start page uses it to
show such a reminder for its whole due day and keep it under the cap.
A short-cycle reminder shows only once its time has come and is not
pinned.
The tick also skips a reminder already sent for its current slot
outside its notify hour before the auto-resolve read. The eventful
satisfy worker still resolves it the moment a reading or lab result
lands, and the poll still runs for it once a day, in the notify hour;
the weekly hold stays after that poll so the safety net is daily.