Add ATM open-offset toggle default off.

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

backend/app/strategy/session.py

@@ -36,8 +36,14 @@ def _has_open_position() -> bool:
         return False
 
 
-def _strategy_floats() -> tuple[float, float, float]:
-    """min_hours, min_leverage, max_atm_open_offset"""
+def _as_bool_setting(raw: str | None, default: bool) -> bool:
+    if raw is None or raw == "":
+        return default
+    return str(raw).strip().lower() in ("1", "true", "yes", "on")
+
+
+def _strategy_floats() -> tuple[float, float, float, bool]:
+    """min_hours, min_leverage, max_atm_open_offset, atm_open_offset_enabled"""
     s = get_settings()
     try:
         from ..models.db import get_db
@@ -55,9 +61,18 @@ def _strategy_floats() -> tuple[float, float, float]:
             db.get_setting("max_atm_open_offset", str(s.max_atm_open_offset))
             or s.max_atm_open_offset
         )
-        return hours, lev, atm_off
+        atm_on = _as_bool_setting(
+            db.get_setting("atm_open_offset_enabled", str(s.atm_open_offset_enabled)),
+            s.atm_open_offset_enabled,
+        )
+        return hours, lev, atm_off, atm_on
     except Exception:
-        return s.min_option_hours, s.min_option_leverage, s.max_atm_open_offset
+        return (
+            s.min_option_hours,
+            s.min_option_leverage,
+            s.max_atm_open_offset,
+            s.atm_open_offset_enabled,
+        )
 
 
 @dataclass(slots=True)
@@ -142,7 +157,7 @@ class StrategySession:
         mark = self.ex.fetch_mark(s.perp_inst_id) or idx
         if mark is None or mark <= 0:
             raise RuntimeError("无法获取标的标记/指数价格，无法选 ATM")
-        min_hours, _, _ = _strategy_floats()
+        min_hours, _, _, _ = _strategy_floats()
         contracts = self.ex.list_option_contracts(s.option_inst_family)
         pair = select_option_pair(contracts, mark_px=float(mark), min_hours=min_hours)
         if pair is None:
@@ -155,7 +170,7 @@ class StrategySession:
         from .signal import decide
 
         s = self.settings
-        min_hours, min_lev, max_atm_off = _strategy_floats()
+        min_hours, min_lev, max_atm_off, atm_off_on = _strategy_floats()
         idx = self.ex.fetch_index(s.index_inst_id)
         mark = self.ex.fetch_mark(s.perp_inst_id) or idx
         if mark is None or mark <= 0:
@@ -173,7 +188,10 @@ class StrategySession:
                 continue
             offset = atm_open_offset(pair.strike, underlying)
             if not atm_allows_open(
-                pair.strike, underlying, max_offset=max_atm_off
+                pair.strike,
+                underlying,
+                max_offset=max_atm_off,
+                enabled=atm_off_on,
             ):
                 logger.info(
                     "skip expiry=%s strike=%.0f atm_offset=%.1f > max=%.1f",
@@ -281,7 +299,7 @@ class StrategySession:
     def atm_needs_realign(self, mark_px: float | None = None) -> bool:
         if self._pair is None:
             return True
-        min_hours, _, _ = _strategy_floats()
+        min_hours, _, _, _ = _strategy_floats()
         if (
             hours_until_expiry(self._pair.expiry_ymd, expiry_ms=self._pair.expiry_ms)
             + 1e-9