chore: fix frontend lints and format issues

- Resolve 'noDelete' by using undefined assignment in TenantSchemaPage
- Resolve React list key warning by using client_id in UserDetailPage
- Run biome formatter across modified components

backend/internal/service/tenant_service_test.go

@@ -137,7 +137,6 @@ func (m *MockUserRepoForTenant) CountByTenantIDs(ctx context.Context, tenantIDs
 	}
 	return args.Get(0).(map[string]int64), args.Error(1)
 }
-
 func (m *MockUserRepoForTenant) CountByCompanyCodes(ctx context.Context, codes []string) (map[string]int64, error) {
 	args := m.Called(ctx, codes)
 	if args.Get(0) == nil {
@@ -146,6 +145,24 @@ func (m *MockUserRepoForTenant) CountByCompanyCodes(ctx context.Context, codes [
 	return args.Get(0).(map[string]int64), args.Error(1)
 }
 
+func (m *MockUserRepoForTenant) UpdateUserLoginIDs(ctx context.Context, userID string, loginIDs []domain.UserLoginID) error {
+	return nil
+}
+
+func (m *MockUserRepoForTenant) GetUserLoginIDs(ctx context.Context, userID string) ([]domain.UserLoginID, error) {
+	return nil, nil
+}
+
+func (m *MockUserRepoForTenant) IsLoginIDTaken(ctx context.Context, loginID string) (bool, error) {
+	return false, nil
+}
+
+func (m *MockUserRepoForTenant) FindTenantIDByLoginID(ctx context.Context, loginID string) (string, error) {
+	return "", nil
+}
+
+// --- Tests ---
+
 func TestTenantService_RegisterTenant_AutoVerify(t *testing.T) {
 	mockRepo := new(MockTenantRepoForSvc)
 	mockOutbox := new(MockKetoOutboxRepositoryShared)

backend/internal/service/user_group_service_test.go

@@ -102,6 +102,27 @@ func (m *MockUserRepository) CountByCompanyCodes(ctx context.Context, codes []st
 	return args.Get(0).(map[string]int64), args.Error(1)
 }
 
+func (m *MockUserRepository) UpdateUserLoginIDs(ctx context.Context, userID string, loginIDs []domain.UserLoginID) error {
+	return nil
+}
+
+func (m *MockUserRepository) GetUserLoginIDs(ctx context.Context, userID string) ([]domain.UserLoginID, error) {
+	return nil, nil
+}
+
+func (m *MockUserRepository) IsLoginIDTaken(ctx context.Context, loginID string) (bool, error) {
+	return false, nil
+}
+
+func (m *MockUserRepository) FindTenantIDByLoginID(ctx context.Context, loginID string) (string, error) {
+	return "", nil
+}
+
+type MockKetoOutboxRepository struct {
+
+	mock.Mock
+}
+
 type MockTenantRepository struct {
 	mock.Mock
 }