Fix roll position display: live contracts, TP profit, and 2-decimal qty precision.

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

tests/test_order_monitor_display_lib.py

@@ -100,6 +100,9 @@ def test_apply_order_price_display_fields_live_sl():
         margin_capital=100,
         leverage=10,
         exchange_notional=1000,
+        contracts=2.0,
+        contract_size=1.0,
+        avg_entry_price=1660.0,
     )
     assert payload["stop_loss"] == 1661
     assert payload["stop_loss_display"] == "1661.00"
@@ -107,6 +110,9 @@ def test_apply_order_price_display_fields_live_sl():
     assert payload["rr_ratio"] is not None
     assert payload["latest_risk_amount"] is not None
     assert payload["latest_risk_amount"] >= 0
+    assert payload["contracts"] == 2.0
+    assert payload["reward_at_tp_usdt"] is not None
+    assert payload["reward_at_tp_usdt"] > 0
 
 
 def test_calc_latest_risk_amount_long():