Fix: completer gets email but not push notification

- Push notification: sent to all users EXCEPT completer
- Email: sent to ALL users INCLUDING completer

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/services/task_service.go

@@ -519,14 +519,12 @@ func (s *TaskService) sendTaskCompletedNotification(task *models.Task, completio
 		"completion_id": completion.ID,
 	}
 
-	// Notify all users except the one who completed the task
+	// Notify all users
 	for _, user := range users {
-		if user.ID == completion.CompletedByID {
-			continue // Don't notify the person who completed it
-		}
+		isCompleter := user.ID == completion.CompletedByID
 
-		// Send push notification
-		if s.notificationService != nil {
+		// Send push notification (to everyone EXCEPT the person who completed it)
+		if !isCompleter && s.notificationService != nil {
 			go func(userID uint) {
 				ctx := context.Background()
 				if err := s.notificationService.CreateAndSendNotification(
@@ -542,7 +540,7 @@ func (s *TaskService) sendTaskCompletedNotification(task *models.Task, completio
 			}(user.ID)
 		}
 
-		// Send email notification
+		// Send email notification (to everyone INCLUDING the person who completed it)
 		if s.emailService != nil && user.Email != "" {
 			go func(u models.User) {
 				if err := s.emailService.SendTaskCompletedEmail(