feat: Step 2 — gamma exposure charts + analytical label improvements

refactor: IA restructure — 7-section terminal layout

feat: multi-expiration max pain analytics (nearest/weekly/monthly/next monthly)

fix: dark theme for IV skew + Greeks charts (match existing dashboard style)

fix: derive expirations from ivSurface not byExpiry (same-day expiry had no iv data)

feat: replace IV scatter chart with professional IV Skew + Greeks panel

Add options analytics dashboard: volume, OI, max pain, sentiment, stock chart

Fix: back to REST API + server-side Black-Scholes IV

Switch to Massive S3 flat files; server-side IV calculation

Fix IV surface: calculate IV via Black-Scholes from option prices

Initial commit: Options Flow Dashboard with IV Surface chart

Initial commit from Create Next App