/**
 * /api/projects/:projectId/track-flows/* routes — track-flow CRUD (M1).
 *
 * Endpoints:
 *   GET  /:projectId/track-flows              — list
 *   GET  /:projectId/track-flows/file/:filename — load flow + trainJson
 *   PUT  /:projectId/track-flows/file/:filename — save flow (+ optional trainJson)
 *   DELETE /:projectId/track-flows/file/:filename — delete flow + sidecar
 */
import { Router } from 'express';
export declare function buildTrackFlowsRouter(): Router;
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