Add live expiry countdown for options positions on instance page and trading hub.

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

tests/test_options_pricing.py

@@ -219,6 +219,20 @@ def test_format_position_row_premium_and_inst_parse():
     assert row["opt_type"] == "P"
     assert row["strike"] == 1700.0
     assert row["premium_paid"] == 1.24
+    assert row["exp_time_ms"] is not None
+    assert row["exp_time_ms"] > 0
+
+
+def test_expiry_ms_from_inst_id():
+    from lib.exchange.okx_options_lib import expiry_ms_from_inst_id, normalize_option_exp_ms
+
+    ms = expiry_ms_from_inst_id("ETH-USD_UM-260709-1700-P")
+    assert ms is not None
+    from datetime import datetime, timezone
+
+    dt = datetime.fromtimestamp(ms / 1000, tz=timezone.utc)
+    assert dt.year == 2026 and dt.month == 7 and dt.day == 9 and dt.hour == 8
+    assert normalize_option_exp_ms(None, "ETH-USD_UM-260709-1700-P") == ms
 
 
 def test_format_position_row_breakeven():