Extend semi-auto with ITM/ATM/OTM, offset, and 1:4 sizing.

Moneyness and perp:option units are plan-only; OTM enforces leverage >=180.

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

backend/app/config.py

@@ -102,7 +102,11 @@ class Settings(BaseSettings):
     semi_option_move_points: float = 50.0  # 顺方向：标的波动点数
     semi_perp_exit_unit: float = 5.0  # 净利出场基数（×k）
     semi_min_option_hours: float = 30.0
-    semi_min_option_leverage: float = 100.0
+    semi_min_option_leverage: float = 200.0  # 虚值默认 200（虚值门仍强制≥180）
+    semi_moneyness: str = "otm"  # itm|atm|otm
+    semi_otm_max_offset: float = 25.0  # 虚值 |K−S| 上限（可配）
+    semi_perp_unit: float = 1.0  # 半自动永续:期权 配比分子
+    semi_option_unit: float = 4.0  # 配比分母，默认 1:4
     close_bid_mark_max_pct: float = 30.0  # 平仓：买一相对标记最大偏差%
     # 残留期权中途平：当前买一权利金 ≥ 初始权利金 × 该% 才尝试卖出
     residual_min_premium_pct: float = 20.0