Include LIVE close-fee estimate in target PnL; rest after manual and emergency close.

Align docs so LIVE exit matches SIM fee buffer; manual full close now enters rest_seconds like auto/emergency.

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

backend/app/strategy/engine.py

@@ -183,7 +183,7 @@ class StrategyEngine:
                 detail = r.detail
                 close_data = r.data
                 if r.ok:
-                    self._after_close()
+                    self.enter_rest_after_close()
             elif st in ("open", "option_closed_perp_pending"):
                 # A：双腿（或续平永续）
                 r = self.matcher.close_group(reason="emergency", bypass_liquidity=True)
@@ -201,7 +201,7 @@ class StrategyEngine:
                 detail = r.detail
                 close_data = r.data
                 if r.ok:
-                    self._after_close()
+                    self.enter_rest_after_close()
 
             residuals = self.matcher.settle_all_residuals_now()
             return {
@@ -214,6 +214,10 @@ class StrategyEngine:
                 "state": self.state(),
             }
 
+    def enter_rest_after_close(self) -> None:
+        """全平成功后进入组间休息（自动 / 手动 / 紧急共用）。"""
+        self._after_close()
+
     def _after_close(self) -> None:
         s = get_settings()
         row = self.db.fetchone("SELECT * FROM strategy_state WHERE id=1")