fix(交易信号): 修复未追踪仓位时平均单价渲染为 %!f(<nil>) 的问题

- 本地无均价记录时回退使用上游 totalAvgPx
- 跟单模板在无均价时不再输出平均单价行

internal/subscriber/tradesignal/convert.go

@@ -50,8 +50,7 @@ func (c *Converter) Convert(body []byte) (string, map[string]interface{}, error)
 		return "", nil, fmt.Errorf("%w: %v", ErrPositionStore, err)
 	}
 	var opts FormatOptions
-	if snap.HasAvg {
-		avg := snap.AvgPrice
+	if avg, ok := avgPriceFor(snap, out); ok {
 		opts.AvgPrice = &avg
 	}
 	text := Format(out, opts)
@@ -60,12 +59,24 @@ func (c *Converter) Convert(body []byte) (string, map[string]interface{}, error)
 		return "", nil, err
 	}
 	data["formatted"] = text
-	if snap.HasAvg {
-		data["avgPrice"] = snap.AvgPrice
+	if opts.AvgPrice != nil {
+		data["avgPrice"] = *opts.AvgPrice
 	}
 	return "trade." + strings.ToLower(out.Action), data, nil
 }
 
+// avgPriceFor prefers the tracked average and falls back to the upstream
+// totalAvgPx when the tracker never saw the position open.
+func avgPriceFor(snap Snapshot, sig *Signal) (float64, bool) {
+	if snap.HasAvg {
+		return snap.AvgPrice, true
+	}
+	if sig.TotalAvgPx != nil && *sig.TotalAvgPx > 0 {
+		return *sig.TotalAvgPx, true
+	}
+	return 0, false
+}
+
 func (c *Converter) overrideFor(code string) *config.StrategyOverride {
 	if c == nil || len(c.overrides) == 0 || code == "" {
 		return nil

internal/subscriber/tradesignal/convert_test.go

@@ -117,8 +117,7 @@ func TestConvertThenRenderCopyTradeTinyPEPE(t *testing.T) {
 	}
 	data["pushedAt"] = "2026.08.22 10:04:29"
 
-	const tmpl = "{{case .side \"LONG\" \"多单\" \"SHORT\" \"空单\"}}{{case .action \"OPEN\" \"开仓\" \"ADD\" \"加仓\" \"CLOSE\" \"平仓\" \"REDUCE\" \"减仓\"}}\n交易品种: {{case .symbol \"ETHUSDT\" \"ETH\" \"BTCUSDT\" \"BTC\" \"SOLUSDT\" \"SOL\" \"BNBUSDT\" \"BNB\" .symbol}}\n{{case .action \"OPEN\" \"开仓价格\" \"ADD\" \"加仓价格\" \"CLOSE\" \"平仓价格\" \"REDUCE\" \"减仓价格\"}}: {{printf \"%.2f\" .price}}\n{{case .action \"OPEN\" \"开仓数量\" \"ADD\" \"加仓数量\" \"CLOSE\" \"平仓数量\" \"REDUCE\" \"减仓数量\"}}: {{printf \"%.2f\" .quantity}}\n平均单价: {{printf \"%.2f\" .avgPrice}}\n{{if or (eq .action \"OPEN\") (eq .action \"ADD\")}}{{if .leverage}}杠杆: {{.leverage}}x\n{{end}}{{end}}策略: {{case .strategyCode \"BLONG\" \"B龙策略\" .strategyCode}}\n推送时间: {{.pushedAt}}"
-	out, err := engine.NewRenderer().Render(tmpl, data)
+	out, err := engine.NewRenderer().Render(copyTradeTmpl, data)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -138,3 +137,46 @@ func TestConvertThenRenderCopyTradeTinyPEPE(t *testing.T) {
 		t.Errorf("tiny price collapsed to 0.00:\n%s", out)
 	}
 }
+
+func TestConvertUntrackedReduceFallsBackToTotalAvgPx(t *testing.T) {
+	_, data, err := NewConverter(nil).Convert([]byte(`{
+		"signalId":"u1","strategyCode":"ALLINETH","symbol":"ETHUSDT",
+		"side":"SHORT","action":"REDUCE","quantity":0.11,"price":1890,
+		"totalAvgPx":1899.03,"posMarginRatio":0.5
+	}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if data["avgPrice"] != 1899.03 {
+		t.Fatalf("avgPrice=%v want 1899.03", data["avgPrice"])
+	}
+	out, err := engine.NewRenderer().Render(copyTradeTmpl, data)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(out, "平均单价: 1899.03") {
+		t.Fatalf("out=\n%s", out)
+	}
+}
+
+func TestConvertUntrackedCloseOmitsAvgPrice(t *testing.T) {
+	_, data, err := NewConverter(nil).Convert([]byte(`{
+		"signalId":"u2","strategyCode":"BLONG","symbol":"SOLUSDT",
+		"side":"SHORT","action":"CLOSE","quantity":0.12,"price":101.32,"totalAvgPx":0
+	}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, ok := data["avgPrice"]; ok {
+		t.Fatalf("avgPrice should be absent, got %v", data["avgPrice"])
+	}
+	out, err := engine.NewRenderer().Render(copyTradeTmpl, data)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(out, "%!") || strings.Contains(out, "平均单价") {
+		t.Fatalf("out=\n%s", out)
+	}
+}
+
+const copyTradeTmpl = "{{case .side \"LONG\" \"多单\" \"SHORT\" \"空单\"}}{{case .action \"OPEN\" \"开仓\" \"ADD\" \"加仓\" \"CLOSE\" \"平仓\" \"REDUCE\" \"减仓\"}}\n交易品种: {{case .symbol \"ETHUSDT\" \"ETH\" \"BTCUSDT\" \"BTC\" \"SOLUSDT\" \"SOL\" \"BNBUSDT\" \"BNB\" .symbol}}\n{{case .action \"OPEN\" \"开仓价格\" \"ADD\" \"加仓价格\" \"CLOSE\" \"平仓价格\" \"REDUCE\" \"减仓价格\"}}: {{printf \"%.2f\" .price}}\n{{case .action \"OPEN\" \"开仓数量\" \"ADD\" \"加仓数量\" \"CLOSE\" \"平仓数量\" \"REDUCE\" \"减仓数量\"}}: {{printf \"%.2f\" .quantity}}\n{{if .avgPrice}}平均单价: {{printf \"%.2f\" .avgPrice}}\n{{end}}{{if or (eq .action \"OPEN\") (eq .action \"ADD\")}}{{if .leverage}}杠杆: {{.leverage}}x\n{{end}}{{end}}策略: {{case .strategyCode \"BLONG\" \"B龙策略\" .strategyCode}}\n推送时间: {{.pushedAt}}"

internal/subscriber/tradesignal/signal.go

@@ -22,6 +22,7 @@ type Signal struct {
 	StopLossRatio     *float64 `json:"stopLossRatio"`
 	PnL               *float64 `json:"pnl"`
 	AccountBalance    *float64 `json:"accountBalance"`
+	TotalAvgPx        *float64 `json:"totalAvgPx"`
 	RawMessage        string   `json:"rawMessage"`
 }