Fix trade log equity_after to chain from initial capital by close time.

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

sl_tp_guard.py

@@ -16,7 +16,7 @@ from zoneinfo import ZoneInfo
 from contract_specs import calc_position_metrics
 from ctp_symbol import ths_to_vnpy_symbol
 from fee_specs import calc_round_trip_fee
-from trade_log_lib import calc_equity_after
+from trade_log_lib import calc_equity_after, refresh_trade_log_equity_chain
 from market_sessions import is_trading_session
 from symbols import ths_to_codes
 from vnpy_bridge import (
@@ -336,6 +336,10 @@ def write_trade_log(
             result if result in TRADE_RESULTS else "手动平仓",
         ),
     )
+    try:
+        refresh_trade_log_equity_chain(conn, capital if capital > 0 else None)
+    except Exception as exc:
+        logger.debug("equity chain refresh after trade log: %s", exc)
     try:
         from stats_engine import refresh_stats_cache
         refresh_stats_cache(conn, capital)