fix(qfs): project ui, config naming, sync timestamps - v1.5.4

internal/services/project.go

@@ -20,6 +20,7 @@ var (
 	ErrProjectForbidden        = errors.New("access to project forbidden")
 	ErrProjectCodeExists       = errors.New("project code and variant already exist")
 	ErrCannotDeleteMainVariant = errors.New("cannot delete main variant")
+	ErrReservedMainVariant     = errors.New("variant name 'main' is reserved")
 )
 
 type ProjectService struct {
@@ -63,6 +64,9 @@ func (s *ProjectService) Create(ownerUsername string, req *CreateProjectRequest)
 		return nil, fmt.Errorf("project code is required")
 	}
 	variant := strings.TrimSpace(req.Variant)
+	if err := validateProjectVariantName(variant); err != nil {
+		return nil, err
+	}
 	if err := s.ensureUniqueProjectCodeVariant("", code, variant); err != nil {
 		return nil, err
 	}
@@ -105,6 +109,9 @@ func (s *ProjectService) Update(projectUUID, ownerUsername string, req *UpdatePr
 	}
 	if req.Variant != nil {
 		localProject.Variant = strings.TrimSpace(*req.Variant)
+		if err := validateProjectVariantName(localProject.Variant); err != nil {
+			return nil, err
+		}
 	}
 	if err := s.ensureUniqueProjectCodeVariant(projectUUID, localProject.Code, localProject.Variant); err != nil {
 		return nil, err
@@ -166,6 +173,13 @@ func normalizeProjectVariant(variant string) string {
 	return strings.ToLower(strings.TrimSpace(variant))
 }
 
+func validateProjectVariantName(variant string) error {
+	if normalizeProjectVariant(variant) == "main" {
+		return ErrReservedMainVariant
+	}
+	return nil
+}
+
 func (s *ProjectService) Archive(projectUUID, ownerUsername string) error {
 	return s.setProjectActive(projectUUID, ownerUsername, false)
 }