fix(timeline): include overdue native tasks in timeline and widget

GetNativeTasksByDateRange's SQL bound (due_date >= start) excluded any
task overdue from a previous day before ComputeDaySection ever got a
chance to mark it IsOverdue, so both the web Timeline view and the
widget API (which both call BuildTimeline with start = today) silently
dropped overdue tasks entirely -- only the Tasks tab (unbounded
GetNativeTasks) showed them. Added GetOverdueNativeTasks and folded its
results into BuildTimeline alongside the ranged fetch.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VTUSAEKfsPc6WGDq45yPHD

2 files changed, 77 insertions, 1 deletions

diff --git a/internal/handlers/timeline_logic.go b/internal/handlers/timeline_logic.go
index 67ba09d..e7c1279 100644
--- a/internal/handlers/timeline_logic.go
+++ b/internal/handlers/timeline_logic.go
@@ -125,7 +125,10 @@ func BuildTimeline(ctx context.Context, s *store.Store, start, end time.Time) ([
 		}
 	}
 
-	// 6. Fetch native (doot-owned) tasks
+	// 6. Fetch native (doot-owned) tasks due within the range, plus any
+	// overdue tasks (due before the range's start) so they still surface --
+	// GetNativeTasksByDateRange's lower bound would otherwise drop them
+	// before ComputeDaySection ever gets a chance to mark them IsOverdue.
 	nativeDated, err := s.GetNativeTasksByDateRange(start, end)
 	if err != nil {
 		log.Printf("Warning: failed to read native tasks: %v", err)
@@ -149,6 +152,29 @@ func BuildTimeline(ctx context.Context, s *store.Store, start, end time.Time) ([
 		}
 	}
 
+	nativeOverdue, err := s.GetOverdueNativeTasks(start)
+	if err != nil {
+		log.Printf("Warning: failed to read overdue native tasks: %v", err)
+	} else {
+		for _, task := range nativeOverdue {
+			if task.DueDate == nil {
+				continue
+			}
+			item := models.TimelineItem{
+				ID:           task.ID,
+				Type:         models.TimelineItemTypeTask,
+				Title:        task.Content,
+				Time:         *task.DueDate,
+				Description:  task.Description,
+				OriginalItem: task,
+				IsCompleted:  task.Completed,
+				Source:       "doot",
+			}
+			item.ComputeDaySection(now)
+			items = append(items, item)
+		}
+	}
+
 	nativeUndated, err := s.GetUndatedNativeTasks()
 	if err != nil {
 		log.Printf("Warning: failed to read undated native tasks: %v", err)
diff --git a/internal/handlers/timeline_logic_test.go b/internal/handlers/timeline_logic_test.go
index 0b7bc37..7d3f6b5 100644
--- a/internal/handlers/timeline_logic_test.go
+++ b/internal/handlers/timeline_logic_test.go
@@ -293,6 +293,56 @@ func TestBuildTimeline_ReadsCalendarEventsFromStore(t *testing.T) {
 	}
 }
 
+// TestBuildTimeline_IncludesOverdueNativeTasks proves the 2026-07-12 fix: a
+// native task whose due_date is BEFORE the requested range's start must
+// still appear in the timeline, marked IsOverdue, instead of being silently
+// dropped. Root cause: GetNativeTasksByDateRange's SQL bound (due_date >=
+// start) excluded overdue tasks from ever being fetched, so ComputeDaySection
+// never got a chance to set IsOverdue -- both the web Timeline view and the
+// widget API (which both call BuildTimeline with a start of "today") showed
+// zero overdue tasks even though the Tasks tab (which calls the unbounded
+// GetNativeTasks) showed them fine.
+func TestBuildTimeline_IncludesOverdueNativeTasks(t *testing.T) {
+	db, cleanup := setupTestDB(t)
+	defer cleanup()
+
+	now := time.Now()
+	today := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
+	overdueDate := today.AddDate(0, 0, -12) // 12 days in the past
+
+	if err := db.CreateNativeTask(models.Task{
+		ID:      "overdue-1",
+		Content: "Pay the water bill",
+		DueDate: &overdueDate,
+	}); err != nil {
+		t.Fatalf("Failed to create native task: %v", err)
+	}
+
+	start := today
+	end := today.AddDate(0, 0, 2)
+
+	items, err := BuildTimeline(context.Background(), db, start, end)
+	if err != nil {
+		t.Fatalf("BuildTimeline failed: %v", err)
+	}
+
+	var found *models.TimelineItem
+	for i := range items {
+		if items[i].ID == "overdue-1" {
+			found = &items[i]
+		}
+	}
+	if found == nil {
+		t.Fatal("expected overdue native task to appear in timeline, but it was missing")
+	}
+	if !found.IsOverdue {
+		t.Error("expected overdue native task to have IsOverdue = true")
+	}
+	if found.Title != "Pay the water bill" {
+		t.Errorf("Title: got %q, want %q", found.Title, "Pay the water bill")
+	}
+}
+
 func TestFetchCalendarEvents_CacheFallbackOnAPIError(t *testing.T) {
 	db, cleanup := setupTestDB(t)
 	defer cleanup()