- Task long-press menu gains Track/Stop Tracking Countdown, storing the
tracked event id + tracking date in the App Group (CountdownTracker)
and reloading widget timelines.
- The widget reads the tracked event directly and bypasses its config:
Mode A (one-off) = tracking date -> event date; Mode B (recurring) =
previous occurrence -> next occurrence via the task's recurrence rule.
- WidgetTask decodes isRecurring/recurrenceLabel from the shared JSON.
- With nothing tracked, the configured modes remain the fallback.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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