feat: eco desk enhanced config + EUR/USD causal simulator
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>
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