Add 期期 close mode (全平/到期平) with scheme-C env toggle.

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

tests/test_hedge_plan_calc.py

@@ -12,6 +12,7 @@ from lib.hedge_plan.hedge_plan_calc_lib import (
     resolve_oo_budget_usdc,
     suggest_oo_sheets,
 )
+from lib.hedge_plan.hedge_plan_monitor_lib import resolve_oo_rest_close_mode
 
 
 class TestHedgePlanCalc(unittest.TestCase):
@@ -180,6 +181,12 @@ class TestHedgePlanCalc(unittest.TestCase):
         self.assertEqual(s["sheets_a"], 2)
         self.assertEqual(s["sheets_b"], 2)
 
+    def test_oo_rest_close_mode_default_close_all(self):
+        self.assertEqual(resolve_oo_rest_close_mode({"oo_close_mode": "close_all"}), "close_all")
+        self.assertEqual(resolve_oo_rest_close_mode({"oo_close_mode": "hold_expiry"}), "hold_expiry")
+        # 旧计划无字段:保持到期平,避免部署后误清残腿
+        self.assertEqual(resolve_oo_rest_close_mode({}), "hold_expiry")
+
 
 if __name__ == "__main__":
     unittest.main()