Add fixed-direction switch for perp/option open side.

When enabled, lock perp long→buy Put or short→buy Call with ITM/ATM only; off keeps ATM/ask rules.

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

frontend/src/api/client.ts

@@ -234,6 +234,8 @@ export type PlanState = {
   min_option_leverage: number;
   atm_open_offset_enabled?: boolean;
   max_atm_open_offset?: number;
+  fixed_direction_enabled?: boolean;
+  fixed_perp_side?: "long" | "short";
   can_open: boolean;
   open_capacity?: {
     leverage?: number;
@@ -299,6 +301,29 @@ export type PlanState = {
   live_ready_reason?: string;
 };
 
+export type StrategySettings = {
+  fee_rate: number;
+  exit_mode: "fixed_usdt" | "premium_multiple";
+  net_profit_target: number;
+  premium_exit_multiple: number;
+  rest_seconds: number;
+  live_order_interval_sec?: number;
+  skip_weekends?: boolean;
+  initial_equity?: number;
+  leverage?: number;
+  min_option_hours?: number;
+  min_option_leverage?: number;
+  atm_open_offset_enabled?: boolean;
+  max_atm_open_offset?: number;
+  fixed_direction_enabled?: boolean;
+  fixed_perp_side?: "long" | "short";
+  close_bid_mark_max_pct?: number;
+  perp_qty_eth?: number;
+  option_qty_eth?: number;
+  show_manual_trade_buttons?: boolean;
+  exchange?: string;
+};
+
 export type RuntimeSettings = {
   mode: "SIM" | "LIVE";
   exchange: string;