Fix OKX spot swap tgtCcy and show options trading USDT in header.

OKX requires quote_ccy/base_ccy for market orders; include trading_usdt in balance display and total funds.

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

tests/test_instance_header_stats_lib.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 import unittest
 
 from lib.instance.instance_embed_context_lib import (
+    options_funding_label,
     profit_loss_ratio_from_averages,
     profit_loss_ratio_from_trades,
     total_funds_usdt,
@@ -27,6 +28,15 @@ class TestHeaderStatsLib(unittest.TestCase):
     def test_total_funds_usdt(self):
         self.assertEqual(total_funds_usdt(100.5, 59.27), 159.77)
         self.assertIsNone(total_funds_usdt(None, 10))
+        self.assertEqual(
+            total_funds_usdt(100, 50, options_trading_usdc=0.2, options_trading_usdt=10),
+            160.2,
+        )
+
+    def test_options_funding_label(self):
+        self.assertEqual(options_funding_label(1.5, 10), "1.50 USDC · 10.00 USDT")
+        self.assertEqual(options_funding_label(None, 10), "10.00 USDT")
+        self.assertEqual(options_funding_label(None, None), "—")
 
 
 if __name__ == "__main__":