From dc56ecccdbf7a05f1b3b59baa684346bf2f71415 Mon Sep 17 00:00:00 2001
From: ZhouYongyou <128128010+zhouyongyou@users.noreply.github.com>
Date: Sun, 2 Nov 2025 21:26:58 +0800
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问题：部分平仓时，历史记录显示的是全仓位盈利，而非实际平仓部分的盈利

根本原因：
- AnalyzePerformance 使用开仓总数量计算部分平仓的盈利
- 应该使用 action.Quantity（实际平仓数量）而非 openPos["quantity"]（总数量）

修复：
- 添加 actualQuantity 变量区分完整平仓和部分平仓
- partial_close 使用 action.Quantity
- 所有相关计算（PnL、PositionValue、MarginUsed）都使用 actualQuantity

影响范围：logger/decision_logger.go:428-465

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 logger/decision_logger.go | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/logger/decision_logger.go b/logger/decision_logger.go
index efa5ab74..746f58ad 100644
--- a/logger/decision_logger.go
+++ b/logger/decision_logger.go
@@ -409,18 +409,24 @@ func (l *DecisionLogger) AnalyzePerformance(lookbackCycles int) (*PerformanceAna
 					quantity := openPos["quantity"].(float64)
 					leverage := openPos["leverage"].(int)
 
+					// 对于 partial_close，使用实际平仓数量；否则使用完整仓位数量
+					actualQuantity := quantity
+					if action.Action == "partial_close" {
+						actualQuantity = action.Quantity
+					}
+
 					// 计算实际盈亏（USDT）
-					// 合约交易 PnL 计算：quantity × 价格差
+					// 合约交易 PnL 计算：actualQuantity × 价格差
 					// 注意：杠杆不影响绝对盈亏，只影响保证金需求
 					var pnl float64
 					if side == "long" {
-						pnl = quantity * (action.Price - openPrice)
+						pnl = actualQuantity * (action.Price - openPrice)
 					} else {
-						pnl = quantity * (openPrice - action.Price)
+						pnl = actualQuantity * (openPrice - action.Price)
 					}
 
 					// 计算盈亏百分比（相对保证金）
-					positionValue := quantity * openPrice
+					positionValue := actualQuantity * openPrice
 					marginUsed := positionValue / float64(leverage)
 					pnlPct := 0.0
 					if marginUsed > 0 {
@@ -431,7 +437,7 @@ func (l *DecisionLogger) AnalyzePerformance(lookbackCycles int) (*PerformanceAna
 					outcome := TradeOutcome{
 						Symbol:        symbol,
 						Side:          side,
-						Quantity:      quantity,
+						Quantity:      actualQuantity,
 						Leverage:      leverage,
 						OpenPrice:     openPrice,
 						ClosePrice:    action.Price,