{"status":"ok","service":"English Flashcard Backend API","version":"1.0.0","timestamp":"2026-10-18T17:22:59.438Z","endpoints":{"health":"/api/health","auth":"/api/auth","decks":"/api/decks","srs":"/api/srs","notifications":"/api/notifications","ai":"/api/ai","vstep":"/api/vstep"}}