Add risk leverage basis option: actual ask vs selection leverage.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/api/client.ts

@@ -331,6 +331,7 @@ export type StrategySettings = {
   option_qty_eth?: number;
   show_manual_trade_buttons?: boolean;
   sizing_mode?: "manual" | "risk_based";
+  risk_leverage_basis?: "actual" | "selection";
   risk_loss_mode?: "percent" | "absolute";
   risk_loss_pct?: number;
   risk_loss_usdt?: number;