{"message":"KidsTube backend is alive","endpoints":["/health","POST /api/auth/signup","POST /api/auth/login","GET  /api/me","GET  /api/profiles","POST /api/profiles","PATCH/DELETE /api/profiles/:id","GET  /api/profiles/:profileId/catalog","POST /api/profiles/:profileId/catalog","DEL  /api/profiles/:profileId/catalog/:itemId","GET  /api/video/info?url=...","GET  /api/video/stream?url=..."]}