테넌트 목록 및 조직 계층 구조 개선

backend/internal/service/user_group_service_test.go

@@ -81,6 +81,20 @@ func (m *MockUserRepository) List(ctx context.Context, offset, limit int, search
 	return nil, 0, nil
 }
 
+func (m *MockUserRepository) CountByTenant(ctx context.Context, tenantID string) (int64, error) {
+	args := m.Called(tenantID)
+	return int64(args.Int(0)), args.Error(1)
+}
+
+func (m *MockUserRepository) CountByTenantIDs(ctx context.Context, tenantIDs []string) (map[string]int64, error) {
+	args := m.Called(tenantIDs)
+	if args.Get(0) == nil {
+		return nil, args.Error(1)
+	}
+	return args.Get(0).(map[string]int64), args.Error(1)
+}
+
+
 type MockTenantRepository struct {
 	mock.Mock
 }