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Eco desk (market_event_detector.py + AIDesks.tsx): - Add currencies filter (USD via FRED, EUR/GBP/JPY/etc via ff_calendar) - Add min_impact filter (high / high+medium / all levels) - Add create_market_event toggle — detect surprises without creating events - Add lookback_releases — inject last N historical releases into event description - New _check_ff_calendar_surprises() for non-USD surprising releases - Frontend EcoConfig: currency chips, impact dropdown, releases input, toggle EUR/USD Simulator (EuroSimulator.tsx): - Pure frontend causal model — no API calls, no historical data - 3-column layout: controls | causal chain SVG | results - FED/BCE rate sliders + hawkish/dovish tone selector - CPI/NFP/PMI surprise inputs - SVG causal chain: CPI→CB→2Y→ΔRate→EURUSD with dynamic colors - Real-time pip decomposition by factor, sensitivity bars - Route /simulator + sidebar entry Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>