Deduct round-trip taker fees from estimated perp PnL.

Unify hub/instance TP profit, calc_pnl, and push/accounting to net of 0.05% per side; leave exchange floating PnL unchanged.

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

lib/strategy/strategy_trend_lib.py

@@ -306,13 +306,19 @@ def calc_tp_profit_usdt(
     contracts: float,
     contract_size: float = 1.0,
 ) -> Optional[float]:
-    """到达止盈价时,按累计张数与加仓后均价的盈利 U."""
+    """到达止盈价时,按累计张数与加仓后均价的净盈利 U(扣双边 taker 费)."""
     try:
         from lib.hub.hub_position_metrics import estimate_linear_swap_upnl_usdt
+        from lib.trade.trade_fee_lib import net_pnl_after_fee
 
-        return estimate_linear_swap_upnl_usdt(
+        gross = estimate_linear_swap_upnl_usdt(
             direction, float(avg_entry), float(take_profit_price), float(contracts), float(contract_size)
         )
+        if gross is None:
+            return None
+        return net_pnl_after_fee(
+            gross, avg_entry, take_profit_price, contracts, contract_size
+        )
     except (TypeError, ValueError):
         return None