Add martingale mode for risk-based percent sizing.

Enable in settings (default off): after N consecutive loss days, double the effective risk_loss_pct up to a configurable max; blocked when base pct > 3%.

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

frontend/src/api/client.ts

@@ -322,6 +322,27 @@ export type PlanState = {
     liquidity_ok?: boolean;
     liquidity_detail?: string | null;
   }[];
+  risk_perp_unit?: number;
+  risk_option_unit?: number;
+  risk_exit_unit?: number;
+  risk_last_k?: number | null;
+  risk_sizing_preview?: {
+    ok?: boolean;
+    locked?: boolean;
+    detail?: string;
+    budget?: number;
+    k?: number;
+    [key: string]: unknown;
+  };
+  risk_sizing_locked?: boolean;
+  martingale_enabled?: boolean;
+  martingale_eligible?: boolean;
+  martingale_doubles?: number;
+  martingale_loss_days?: number;
+  risk_effective_loss_pct?: number;
+  risk_loss_pct?: number;
+  sizing_mode?: "manual" | "risk_based";
+  risk_based?: boolean;
   ledger: { equity: number; available: number; reserved: number };
   mode?: "SIM" | "LIVE";
   sim?: boolean;
@@ -364,6 +385,9 @@ export type StrategySettings = {
   risk_option_unit?: number;
   risk_exit_unit?: number;
   risk_sizing_preview?: Record<string, unknown>;
+  martingale_enabled?: boolean;
+  martingale_start_after_loss_days?: number;
+  martingale_max_doubles?: number;
   exchange?: string;
 };