feat(fxt): add epoch financial metrics to train monitor output

Add print_financial_metrics() to the monitor command, displaying
per-model Sharpe ratio (color-coded green/yellow/red), win rate,
max drawdown, profit factor, total return, trade count, and
action distribution (BUY/SELL/HOLD percentages). Only shown when
sessions report non-zero financial data.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bin/fxt/src/commands/train/monitor.rs

@@ -101,6 +101,7 @@ fn render_snapshot(resp: &GetLiveTrainingMetricsResponse) {
     print_rl_diagnostics(&resp.sessions);
     print_hyperopt_summary(&resp.sessions);
     print_health_summary(&resp.sessions);
+    print_financial_metrics(&resp.sessions);
 }
 
 fn render_tui(resp: &GetLiveTrainingMetricsResponse) {
@@ -232,3 +233,42 @@ fn print_health_summary(sessions: &[TrainingSession]) {
         total_nan, total_grad, total_ckpt
     );
 }
+
+fn print_financial_metrics(sessions: &[TrainingSession]) {
+    let financial: Vec<_> = sessions
+        .iter()
+        .filter(|s| s.epoch_sharpe != 0.0 || s.epoch_win_rate > 0.0)
+        .collect();
+    if financial.is_empty() {
+        return;
+    }
+    println!();
+    println!("{}", "Epoch Financial Metrics:".bright_cyan());
+    for s in &financial {
+        let sharpe_colored = if s.epoch_sharpe >= 2.0 {
+            format!("{:.2}", s.epoch_sharpe).green()
+        } else if s.epoch_sharpe >= 1.0 {
+            format!("{:.2}", s.epoch_sharpe).yellow()
+        } else {
+            format!("{:.2}", s.epoch_sharpe).red()
+        };
+        println!(
+            "  {}: Sharpe={} WinRate={:.1}% MaxDD={:.1}% PF={:.2} Return={:+.2}% Trades={}",
+            s.model.bright_white(),
+            sharpe_colored,
+            s.epoch_win_rate * 100.0,
+            s.epoch_max_drawdown * 100.0,
+            s.epoch_profit_factor,
+            s.epoch_total_return * 100.0,
+            s.epoch_total_trades,
+        );
+        if s.action_buy_pct > 0.0 || s.action_sell_pct > 0.0 {
+            println!(
+                "    Actions: BUY {:.0}% | SELL {:.0}% | HOLD {:.0}%",
+                s.action_buy_pct * 100.0,
+                s.action_sell_pct * 100.0,
+                s.action_hold_pct * 100.0,
+            );
+        }
+    }
+}