A date-less reminder has no urgency — it lands in the "Later"/"No date" bucket,
out of the overdue/today/this-week rollups and the daily digest — so every
create flow now pre-fills the due date to +1 week (editable) and blocks an empty
save. Shared reminderDefaultDue() helper; edit paths also pre-fill the default
for legacy date-less reminders.
Surfaces:
- Mobile: add-investor sheet (date auto-fills when you start the optional
reminder), standalone Reminders "New reminder", Grid-detail "Set a reminder".
- Desktop: Reminders page "+ New reminder", grid reminder modal.
Server still accepts a null due_date by design (bot/automation callers); this is
a human-UI requirement. Frontend-only; no schema/migration/dependency change.