feat: Created task lists that work in categories

backend/internal/application/services/category_service.go

@@ -15,6 +15,7 @@ import (
 // CategoryService handles category operations
 type CategoryService struct {
 	categoryRepo      repositories.CategoryRepository
+	taskListRepo      repositories.TaskListRepository
 	membershipRepo    repositories.MembershipRepository
 	noteRepo          repositories.NoteRepository
 	permissionService *PermissionService
@@ -23,12 +24,14 @@ type CategoryService struct {
 // NewCategoryService creates a new category service
 func NewCategoryService(
 	categoryRepo repositories.CategoryRepository,
+	taskListRepo repositories.TaskListRepository,
 	membershipRepo repositories.MembershipRepository,
 	noteRepo repositories.NoteRepository,
 	permissionService *PermissionService,
 ) *CategoryService {
 	return &CategoryService{
 		categoryRepo:      categoryRepo,
+		taskListRepo:      taskListRepo,
 		membershipRepo:    membershipRepo,
 		noteRepo:          noteRepo,
 		permissionService: permissionService,
@@ -134,6 +137,14 @@ func (s *CategoryService) buildCategoryTree(ctx context.Context, category *entit
 		}
 	}
 
+	// Get task lists in this category
+	taskLists, err := s.taskListRepo.ListTaskListsByCategory(ctx, spaceID, category.ID)
+	if err == nil {
+		for _, taskList := range taskLists {
+			tree.TaskLists = append(tree.TaskLists, dto.NewTaskListDTO(taskList))
+		}
+	}
+
 	return tree, nil
 }