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>

backend/app/strategy/engine.py

@@ -93,6 +93,16 @@ class StrategyEngine:
         max_atm_off = self.ledger.get_setting_float(
             "max_atm_open_offset", s.max_atm_open_offset
         )
+        fixed_dir_on = self.ledger.get_setting_bool(
+            "fixed_direction_enabled", s.fixed_direction_enabled
+        )
+        fixed_perp = str(
+            self.ledger.get_setting_str("fixed_perp_side", s.fixed_perp_side)
+            or s.fixed_perp_side
+            or "long"
+        ).strip().lower()
+        if fixed_perp not in ("long", "short"):
+            fixed_perp = "long"
         perp_qty = self.ledger.get_setting_float("perp_qty_eth", s.perp_qty_eth)
         opt_qty = self.ledger.get_setting_float("option_qty_eth", s.option_qty_eth)
         rest_until = row["rest_until_ms"]
@@ -136,6 +146,8 @@ class StrategyEngine:
             "min_option_leverage": min_opt_lev,
             "atm_open_offset_enabled": atm_off_on,
             "max_atm_open_offset": max_atm_off,
+            "fixed_direction_enabled": fixed_dir_on,
+            "fixed_perp_side": fixed_perp,
             "can_open": allow_open,
             "open_capacity": open_cap,
             "last_error": last_error,