支持后台支付配置管理

backend/internal/modules/paymentconfig/service.go

@@ -0,0 +1,66 @@
+package paymentconfig
+
+type Service struct {
+	repo *Repository
+}
+
+func NewService(repo *Repository) *Service {
+	return &Service{repo: repo}
+}
+
+// List 获取配置列表
+func (s *Service) List(query ListQuery) (*ListResponse, error) {
+	items, total, err := s.repo.List(query)
+	if err != nil {
+		return nil, err
+	}
+
+	page := query.Page
+	if page < 1 {
+		page = 1
+	}
+	pageSize := query.PageSize
+	if pageSize < 1 {
+		pageSize = 20
+	}
+
+	return &ListResponse{
+		Items:    items,
+		Total:    total,
+		Page:     page,
+		PageSize: pageSize,
+	}, nil
+}
+
+// Get 获取单个配置
+func (s *Service) Get(id uint64, includeSecret bool) (*ConfigDTO, error) {
+	return s.repo.FindByID(id, includeSecret)
+}
+
+// Create 创建配置
+func (s *Service) Create(req CreateRequest, actorID uint64, meta AuditMeta) (*ConfigDTO, error) {
+	return s.repo.Create(req, actorID, meta)
+}
+
+// Update 更新配置
+func (s *Service) Update(id uint64, req UpdateRequest, actorID uint64, meta AuditMeta) (*ConfigDTO, error) {
+	return s.repo.Update(id, req, actorID, meta)
+}
+
+// Delete 删除配置
+func (s *Service) Delete(id uint64, actorID uint64, meta AuditMeta) error {
+	return s.repo.Delete(id, actorID, meta)
+}
+
+// GetDefaultConfig 获取默认配置（用于支付模块调用）
+func (s *Service) GetDefaultConfig(provider string) (*ConfigDTO, error) {
+	config, err := s.repo.FindDefault(provider)
+	if err != nil {
+		return nil, err
+	}
+	dto, err := s.repo.toDTO(*config, true) // 包含密钥
+	if err != nil {
+		return nil, err
+	}
+	return &dto, nil
+}