Fix trading runtime sync and stale trading snapshot

fix: 429 rate limiting — reduce polling, add cache headers, improve error UX

feat: US market parity - ML predictions, local route fixes, scan progress

fix: ruthless audit v2 - 19 US market issues resolved

fix: complete US market experience - market sync, bilingual UI, broken links

feat: US market UI dashboard + TypeScript/ESLint fixes

feat: Supabase Storage as persistent trading data store

fix: ESLint error in trading route

fix: auto-trading 502 on Netlify + portfolio auto-price

feat: live position monitoring with charts + trading system production ready