fix(widget): pin all-day calendar events to the top instead of losing them

WidgetItem.isAllDay was carried by the client's data model but nothing
ever read it. All-day events had no Start at all, so they fell into the
same floating-task queue as ordinary untimed tasks; if enough tasks were
ahead of one in the queue, SlotPacker could assign it an hour slot past
the visible grid range entirely -- not merely unpinned, actually
invisible.

Server: TimelineItemToWidgetItem now populates Start for all-day
CALENDAR EVENTS specifically (their real event date), while leaving
undated doot/gtask tasks -- also flagged IsAllDay as a "no specific
time" fallback, a different concept -- on the existing nil-Start
floating behavior.

Client: all-day events are filtered out of the hourly grid/floating-task
pipeline entirely, bucketed by day using the new Start date, and
rendered in a new pinned AllDayRow section right after the TODAY/TOMORROW
headers.

1 files changed, 18 insertions, 7 deletions

diff --git a/internal/handlers/widget.go b/internal/handlers/widget.go
index 6c3b455..dc10db6 100644
--- a/internal/handlers/widget.go
+++ b/internal/handlers/widget.go
@@ -52,15 +52,26 @@ func TimelineItemToWidgetItem(item models.TimelineItem) models.WidgetItem {
 		wi.Completable = item.Source == "doot"
 	}
 
-	// Only populate Start/End for items with a real time (non-all-day, non-zero)
-	if !item.IsAllDay && !item.Time.IsZero() {
+	// Only populate Start/End for items with a real time. All-day CALENDAR
+	// EVENTS (not undated doot/gtask tasks, which are also flagged IsAllDay
+	// as a "no specific time" fallback -- see TimelineItem.ComputeDaySection)
+	// get Start populated too, using their real event date, so the widget
+	// client can pin them to the top of the correct day's section instead of
+	// losing them in the floating-task hourly-slot packer, which has no
+	// concept of "all day" and can push a slot past the visible grid range
+	// entirely. Tasks keep the existing nil-Start "floating" treatment
+	// regardless of IsAllDay -- only Start is set for them (never End), and
+	// only when they have a real time.
+	if !item.Time.IsZero() && (!item.IsAllDay || item.Type == models.TimelineItemTypeEvent) {
 		t := item.Time
 		wi.Start = &t
-		if item.EndTime != nil {
-			wi.End = item.EndTime
-		} else {
-			end := item.Time.Add(time.Hour)
-			wi.End = &end
+		if !item.IsAllDay {
+			if item.EndTime != nil {
+				wi.End = item.EndTime
+			} else {
+				end := item.Time.Add(time.Hour)
+				wi.End = &end
+			}
 		}
 	}