feat(tasks): thread project color from BuildTimeline to WidgetItem

Projects are fetched once per BuildTimeline call into a color lookup
map, not queried per-task -- same pattern as RecurringEventID's
existing TimelineItem->WidgetItem threading.

4 files changed, 19 insertions, 0 deletions

diff --git a/internal/handlers/timeline_logic.go b/internal/handlers/timeline_logic.go
index 6fddd1d..b90b61e 100644
--- a/internal/handlers/timeline_logic.go
+++ b/internal/handlers/timeline_logic.go
@@ -17,6 +17,16 @@ func BuildTimeline(ctx context.Context, s *store.Store, start, end time.Time) ([
 	var items []models.TimelineItem
 	now := config.Now()
 
+	// Fetch all projects once into a color lookup map
+	projectColors := make(map[string]string)
+	if projects, err := s.GetProjects(); err != nil {
+		log.Printf("Warning: failed to read projects: %v", err)
+	} else {
+		for _, p := range projects {
+			projectColors[p.ID] = p.Color
+		}
+	}
+
 	// 1. Fetch Meals - combine multiple items for same date+mealType
 	meals, err := s.GetMealsByDateRange(start, end)
 	if err != nil {
@@ -147,6 +157,7 @@ func BuildTimeline(ctx context.Context, s *store.Store, start, end time.Time) ([
 				OriginalItem: task,
 				IsCompleted:  task.Completed,
 				Source:       "doot",
+				ProjectColor: projectColors[task.ProjectID],
 			}
 			item.ComputeDaySection(now)
 			items = append(items, item)
@@ -170,6 +181,7 @@ func BuildTimeline(ctx context.Context, s *store.Store, start, end time.Time) ([
 				OriginalItem: task,
 				IsCompleted:  task.Completed,
 				Source:       "doot",
+				ProjectColor: projectColors[task.ProjectID],
 			}
 			item.ComputeDaySection(now)
 			items = append(items, item)
@@ -191,6 +203,7 @@ func BuildTimeline(ctx context.Context, s *store.Store, start, end time.Time) ([
 				IsCompleted:  task.Completed,
 				Source:       "doot",
 				IsAllDay:     true,
+				ProjectColor: projectColors[task.ProjectID],
 			}
 			item.ComputeDaySection(now)
 			items = append(items, item)
diff --git a/internal/handlers/widget.go b/internal/handlers/widget.go
index 1bb706e..05c0bdb 100644
--- a/internal/handlers/widget.go
+++ b/internal/handlers/widget.go
@@ -97,6 +97,10 @@ func TimelineItemToWidgetItem(item models.TimelineItem) models.WidgetItem {
 		wi.DueDate = &due
 	}
 
+	if item.ProjectColor != "" {
+		wi.ProjectColor = &item.ProjectColor
+	}
+
 	return wi
 }
 
diff --git a/internal/models/timeline.go b/internal/models/timeline.go
index 6e48f91..1313712 100644
--- a/internal/models/timeline.go
+++ b/internal/models/timeline.go
@@ -44,6 +44,7 @@ type TimelineItem struct {
 	// Source-specific metadata
 	ListID           string `json:"list_id,omitempty"`            // For Google Tasks
 	RecurringEventID string `json:"recurring_event_id,omitempty"` // For calendar events
+	ProjectColor     string `json:"project_color,omitempty"`      // For doot-native tasks with a project assigned
 }
 
 // ComputeDaySection sets the DaySection, IsOverdue, and IsAllDay based on the item's time
diff --git a/internal/models/widget.go b/internal/models/widget.go
index cbaf19c..da13008 100644
--- a/internal/models/widget.go
+++ b/internal/models/widget.go
@@ -18,6 +18,7 @@ type WidgetItem struct {
 	URL              string     `json:"url,omitempty"`
 	Completable      bool       `json:"completable"` // true = doot task (checkbox shown)
 	RecurringEventID string     `json:"recurring_event_id,omitempty"`
+	ProjectColor     *string    `json:"project_color,omitempty"`
 }
 
 // WidgetResponse is the full /api/widget response body.