6 stat panels (Ensemble Agreement, Prediction Confidence, Model Accuracy, Ensemble Sharpe, Realized PnL, Unrealized PnL) showed red when ML metrics don't exist yet. Added special null mapping → "Inactive" in dark-blue. Panels will still show red/yellow/green when the trading system is active and emitting metrics. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>