第 5 阶段：纠纷、通知与后台-1

backend/internal/modules/systemconfig/service.go

@@ -0,0 +1,33 @@
+package systemconfig
+
+import "errors"
+
+var (
+	ErrDependencyUnavailable = errors.New("dependency unavailable")
+	ErrInvalidConfig         = errors.New("invalid config")
+)
+
+type Service struct {
+	repo *Repository
+}
+
+func NewService(repo *Repository) *Service {
+	return &Service{repo: repo}
+}
+
+func (s *Service) List() ([]ConfigDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.List()
+}
+
+func (s *Service) Update(actorID uint64, key string, req UpdateRequest, meta AuditMeta) (*ConfigDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	if key == "" || req.Value == "" {
+		return nil, ErrInvalidConfig
+	}
+	return s.repo.Update(actorID, key, req, meta)
+}