df 클라이언트 상세 조회 테스트 추가

backend/internal/handler/common_test.go

@@ -118,6 +118,24 @@ func (m *mockConsentRepo) ListByTenant(ctx context.Context, clientID, tenantID s
 	return nil, 0, nil
 }
 
+// --- Mock Secret Repository ---
+
+type mockSecretRepo struct {
+	secrets map[string]string
+}
+
+func (m *mockSecretRepo) Upsert(ctx context.Context, clientID, secret string) error {
+	if m.secrets == nil { m.secrets = make(map[string]string) }
+	m.secrets[clientID] = secret
+	return nil
+}
+func (m *mockSecretRepo) GetByID(ctx context.Context, clientID string) (string, error) {
+	return m.secrets[clientID], nil
+}
+func (m *mockSecretRepo) Delete(ctx context.Context, clientID string) error {
+	delete(m.secrets, clientID)
+	return nil
+}
 
 // --- HTTP Mock Helpers ---
 
@@ -146,4 +164,4 @@ func httpJSONAny(r *http.Request, code int, data any) *http.Response {
 		Body:    io.NopCloser(bytes.NewBuffer(body)),
 		Request: r,
 	}
-}
+}