feat(widget): add DueDate field for doot tasks to the widget API

3 files changed, 81 insertions, 0 deletions

diff --git a/internal/handlers/widget.go b/internal/handlers/widget.go
index f8a63a0..3a30fcf 100644
--- a/internal/handlers/widget.go
+++ b/internal/handlers/widget.go
@@ -76,6 +76,15 @@ func TimelineItemToWidgetItem(item models.TimelineItem) models.WidgetItem {
 		}
 	}
 
+	// DueDate is independent of Start/IsAllDay -- doot tasks deliberately
+	// keep Start nil (see the "floating task" doc comment above) so the
+	// client's SlotPacker positions them, but the Android detail popup
+	// still needs to know the real due date to display and reschedule it.
+	if item.Type == models.TimelineItemTypeTask && item.Source == "doot" && !item.Time.IsZero() {
+		due := item.Time
+		wi.DueDate = &due
+	}
+
 	return wi
 }
 
diff --git a/internal/handlers/widget_test.go b/internal/handlers/widget_test.go
index 06e1749..14dd396 100644
--- a/internal/handlers/widget_test.go
+++ b/internal/handlers/widget_test.go
@@ -210,6 +210,77 @@ func TestTimelineItemToWidgetItem_NotOverdueByDefault(t *testing.T) {
 	}
 }
 
+// TestTimelineItemToWidgetItem_DootTaskGetsDueDate proves the 2026-07-12
+// clickable-reschedule fix: a doot task's raw due date must reach the
+// client via a NEW field (DueDate) that is independent of Start/IsAllDay --
+// Start is deliberately left nil for doot tasks (see
+// TestTimelineItemToWidgetItem_AllDayTask_KeepsFloatingBehavior) so the
+// client's floating-task SlotPacker can position it, and that must keep
+// working unchanged. Before this fix there was no way for the Android
+// detail popup to know a doot task's current due date at all.
+func TestTimelineItemToWidgetItem_DootTaskGetsDueDate(t *testing.T) {
+	due := time.Date(2026, 7, 15, 0, 0, 0, 0, time.Local)
+	item := models.TimelineItem{
+		ID:       "doot-1",
+		Title:    "Pay the water bill",
+		Source:   "doot",
+		Type:     models.TimelineItemTypeTask,
+		Time:     due,
+		IsAllDay: true,
+	}
+
+	wi := TimelineItemToWidgetItem(item)
+
+	if wi.DueDate == nil {
+		t.Fatal("expected DueDate to be set for a doot task with a real due date")
+	}
+	if !wi.DueDate.Equal(due) {
+		t.Errorf("DueDate = %v, want %v", *wi.DueDate, due)
+	}
+	// Start must stay nil -- this is the pre-existing floating-task
+	// behavior and this feature must not change it.
+	if wi.Start != nil {
+		t.Error("Start must remain nil for a doot task -- DueDate is a separate field, not a replacement")
+	}
+}
+
+func TestTimelineItemToWidgetItem_UndatedDootTask_NilDueDate(t *testing.T) {
+	item := models.TimelineItem{
+		ID:       "doot-undated",
+		Title:    "Someday task",
+		Source:   "doot",
+		Type:     models.TimelineItemTypeTask,
+		Time:     time.Now(),
+		IsAllDay: true,
+	}
+	// Zero Time simulates the "no real due date" case at the field level;
+	// TimelineItemToWidgetItem's DueDate logic must guard on !Time.IsZero().
+	item.Time = time.Time{}
+
+	wi := TimelineItemToWidgetItem(item)
+
+	if wi.DueDate != nil {
+		t.Error("expected DueDate to be nil when the source item has a zero Time")
+	}
+}
+
+func TestTimelineItemToWidgetItem_CalendarEvent_NilDueDate(t *testing.T) {
+	start := time.Now()
+	item := models.TimelineItem{
+		ID:     "cal-1",
+		Title:  "Team sync",
+		Source: "calendar",
+		Type:   models.TimelineItemTypeEvent,
+		Time:   start,
+	}
+
+	wi := TimelineItemToWidgetItem(item)
+
+	if wi.DueDate != nil {
+		t.Error("expected DueDate to stay nil for a non-doot item (calendar event)")
+	}
+}
+
 func TestHandleWidgetComplete_NonCompletable(t *testing.T) {
 	h := &Handler{}
 	body := `{"id":"x","source":"calendar"}`
diff --git a/internal/models/widget.go b/internal/models/widget.go
index e2876b0..54a6eee 100644
--- a/internal/models/widget.go
+++ b/internal/models/widget.go
@@ -14,6 +14,7 @@ type WidgetItem struct {
 	End         *time.Time `json:"end,omitempty"`
 	IsAllDay    bool       `json:"is_all_day"`
 	IsOverdue   bool       `json:"is_overdue"`
+	DueDate     *time.Time `json:"due_date,omitempty"` // doot tasks only -- see TimelineItemToWidgetItem
 	URL         string     `json:"url,omitempty"`
 	Completable bool       `json:"completable"` // true = doot task (checkbox shown)
 }