feat: v5.1 — Markets Overview restructured: Global Indices Board (all indices with vola) + Commodities Board (GC1!, SI1!, Copper, CL1!, Brent, NG1!) + Volatility Summary + VIX Term Structure (fixed with direct Yahoo data)
feat: v5.0 — SPX & VIX Analytics tab with full options chain analysis (CBOE live data, GEX+/VEX/VGR, Zero Gamma, Crash Profile, BL Forecast, IV Skew/Smile, Heatmap, OI Profile, P/C Ratios, VIX Term Structure) + all matplotlib charts in dark institutional style