feat(trend): 趋势回调保本移交下单监控并统一写交易记录

保本后结束趋势计划，持仓转入下单监控（备注趋势回调），交易所同时挂保本止损与计划止盈；中控或交易所平仓均经下单监控写入交易记录（trend_plan_id、开仓类型），四所共用 strategy_trend_register。

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

strategy_trade_labels.py

@@ -1,6 +1,8 @@
 """策略交易写入 trade_records 时的类型与复盘开仓类型标注。"""
 from __future__ import annotations
 
+from typing import Optional
+
 MONITOR_TYPE_TREND_PULLBACK = "趋势回调"
 MONITOR_TYPE_ROLL = "顺势加仓"
 
@@ -12,6 +14,38 @@ STRATEGY_ENTRY_REASON_OPTIONS = (
     ENTRY_REASON_ROLL,
 )
 
+# 趋势回调保本移交下单监控：order_monitors.key_signal_type / 平仓备注
+TREND_HANDOFF_KEY_SIGNAL = ENTRY_REASON_TREND_PULLBACK
+TREND_HANDOFF_TRADE_NOTE = "趋势回调计划"
+
+
+def handoff_trade_miss_reason(miss_reason, row) -> Optional[str]:
+    """趋势保本移交的监控单平仓：交易记录备注带来源。"""
+    if trend_plan_id_from_monitor_row(row) is None:
+        return miss_reason
+    base = (miss_reason or "").strip()
+    if TREND_HANDOFF_TRADE_NOTE in base:
+        return base or TREND_HANDOFF_TRADE_NOTE
+    if base:
+        return f"{TREND_HANDOFF_TRADE_NOTE}；{base}"
+    return TREND_HANDOFF_TRADE_NOTE
+
+
+def trend_plan_id_from_monitor_row(row) -> Optional[int]:
+    if row is None:
+        return None
+    try:
+        keys = row.keys() if hasattr(row, "keys") else []
+    except Exception:
+        keys = []
+    if "trend_plan_id" not in keys or row["trend_plan_id"] in (None, ""):
+        return None
+    try:
+        tid = int(row["trend_plan_id"])
+        return tid if tid > 0 else None
+    except (TypeError, ValueError):
+        return None
+
 
 def order_had_roll_fills(conn, order_monitor_id) -> bool:
     try: