fix(hub): live market PnL and Gate drag SL place

Parse Gate unrealised_pnl in agent; refresh hub market floating PnL from board and trends; clamp Gate TP/SL triggers before place.

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

tests/test_hub_agent_mark_price.py

@@ -10,6 +10,9 @@ sys.path.insert(0, str(ROOT / "manual_trading_hub"))
 
 from agent import _position_mark_price, _ticker_mark_price  # noqa: E402
 
+sys.path.insert(0, str(ROOT))
+from hub_position_metrics import parse_position_unrealized_pnl  # noqa: E402
+
 
 class TestHubAgentMarkPrice(unittest.TestCase):
     def test_binance_mark_price(self):
@@ -39,6 +42,12 @@ class TestHubAgentMarkPrice(unittest.TestCase):
 
         self.assertAlmostEqual(_ticker_mark_price(_Ex(), "BTC/USDT:USDT"), 99.5)
 
+    def test_gate_unrealised_pnl_in_info(self):
+        pnl = parse_position_unrealized_pnl(
+            {"info": {"unrealised_pnl": "6.81"}, "unrealizedPnl": None}
+        )
+        self.assertAlmostEqual(pnl, 6.81)
+
 
 if __name__ == "__main__":
     unittest.main()