The Trino/Iceberg lakehouse has zero tables, so all Trino-backed
dashboards showed 'No data available'. Rewrote all four to use
existing PostgreSQL-backed API endpoints:
- Sentiment Heatmap: useTrends + useCompanies → sector and ticker
trend strength bar charts (30k trend_windows in DB)
- Prediction Accuracy: useRecommendations → confidence distribution
and action distribution charts (30k recommendations in DB)
- Paper PnL: useTradingMetrics + useTradingMetricsHistory → equity
curve, daily returns, win/loss stats from trading engine
- Model Quality: useModelPerformance + useModelFailures → success
rate, latency, retries, and failure table from ops API
Removed unused Trino query function and ScatterChart imports.