fix: undated tasks were landing in the widget's scheduled-events grid

ComputeDaySection unconditionally recomputed IsAllDay from a
midnight-time heuristic, clobbering the IsAllDay:true flag callers set
to mark floating (no-due-date) tasks -- since undated tasks use Time =
now, this silently reset IsAllDay to false and gave them a real Start,
so the widget could render them via EventBlock/HourRow instead of
TaskRow. Their click handler always opens the calendar/source URL, so
tapping a no-due-date task (e.g. a Google Task) opened Google Calendar
instead of the task detail sheet.

ComputeDaySection now only ever sets IsAllDay true, never clears an
already-true value. Also flag IsAllDay for undated Google Tasks, which
never got it set at all (only native undated doot tasks did).

1 files changed, 9 insertions, 2 deletions

diff --git a/internal/models/timeline.go b/internal/models/timeline.go
index 4b90856..5224b72 100644
--- a/internal/models/timeline.go
+++ b/internal/models/timeline.go
@@ -66,8 +66,15 @@ func (item *TimelineItem) ComputeDaySection(now time.Time) {
 	// Check if item is overdue (before today)
 	item.IsOverdue = itemDay.Before(today)
 
-	// Check if item is all-day (midnight time means no specific time)
-	item.IsAllDay = localItemTime.Hour() == 0 && localItemTime.Minute() == 0
+	// Check if item is all-day (midnight time means no specific time).
+	// Only ever sets IsAllDay to true here -- never clears a true a caller
+	// already set (e.g. nativeUndated/gtask "no due date" tasks, which use
+	// IsAllDay as a floating-task marker with Time set to "now", not
+	// midnight -- clobbering it back to false made them look like real
+	// scheduled items to the widget client).
+	if localItemTime.Hour() == 0 && localItemTime.Minute() == 0 {
+		item.IsAllDay = true
+	}
 
 	if itemDay.Before(tomorrow) {
 		item.DaySection = DaySectionToday