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/api/settings.py

@@ -41,6 +41,8 @@ KEYS = (
     "min_option_leverage",
     "atm_open_offset_enabled",
     "max_atm_open_offset",
+    "fixed_direction_enabled",
+    "fixed_perp_side",
     "close_bid_mark_max_pct",
     "perp_qty_eth",
     "option_qty_eth",
@@ -63,6 +65,8 @@ class StrategySettingsBody(BaseModel):
     min_option_leverage: float | None = Field(default=None, ge=1, le=10000)
     atm_open_offset_enabled: bool | None = None
     max_atm_open_offset: float | None = Field(default=None, ge=0, le=100)
+    fixed_direction_enabled: bool | None = None
+    fixed_perp_side: str | None = Field(default=None, pattern="^(long|short)$")
     close_bid_mark_max_pct: float | None = Field(default=None, ge=1, le=100)
     perp_qty_eth: float | None = Field(default=None, ge=0.01, le=100)
     option_qty_eth: float | None = Field(default=None, ge=0.01, le=100)
@@ -131,6 +135,25 @@ def _read_settings() -> dict:
             db.get_setting("max_atm_open_offset", str(s.max_atm_open_offset))
             or s.max_atm_open_offset
         ),
+        "fixed_direction_enabled": _as_bool(
+            db.get_setting(
+                "fixed_direction_enabled", str(s.fixed_direction_enabled)
+            ),
+            s.fixed_direction_enabled,
+        ),
+        "fixed_perp_side": (
+            side
+            if (
+                side := str(
+                    db.get_setting("fixed_perp_side", s.fixed_perp_side)
+                    or s.fixed_perp_side
+                )
+                .strip()
+                .lower()
+            )
+            in ("long", "short")
+            else "long"
+        ),
         "close_bid_mark_max_pct": float(
             db.get_setting("close_bid_mark_max_pct", str(s.close_bid_mark_max_pct))
             or s.close_bid_mark_max_pct