fix(market): add 3m volume and ATR14 indicators to AI data (#830)

* Support 3m volume and ATR4

* test(market): add unit tests for Volume and ATR14 indicators

- Add comprehensive tests for calculateIntradaySeries Volume collection
- Add tests for ATR14 calculation with various data scenarios
- Add edge case tests for insufficient data
- Test Volume value precision and consistency with other indicators
- All 8 test cases pass successfully

Resolves code review blocking issue from PR #830

market/data.go

@@ -227,6 +227,7 @@ func calculateIntradaySeries(klines []Kline) *IntradayData {
 		MACDValues:  make([]float64, 0, 10),
 		RSI7Values:  make([]float64, 0, 10),
 		RSI14Values: make([]float64, 0, 10),
+		Volume:      make([]float64, 0, 10),
 	}
 
 	// 获取最近10个数据点
@@ -237,6 +238,7 @@ func calculateIntradaySeries(klines []Kline) *IntradayData {
 
 	for i := start; i < len(klines); i++ {
 		data.MidPrices = append(data.MidPrices, klines[i].Close)
+		data.Volume = append(data.Volume, klines[i].Volume)
 
 		// 计算每个点的EMA20
 		if i >= 19 {
@@ -261,6 +263,9 @@ func calculateIntradaySeries(klines []Kline) *IntradayData {
 		}
 	}
 
+	// 计算3m ATR14
+	data.ATR14 = calculateATR(klines, 14)
+
 	return data
 }
 
@@ -440,6 +445,12 @@ func Format(data *Data) string {
 		if len(data.IntradaySeries.RSI14Values) > 0 {
 			sb.WriteString(fmt.Sprintf("RSI indicators (14‑Period): %s\n\n", formatFloatSlice(data.IntradaySeries.RSI14Values)))
 		}
+
+		if len(data.IntradaySeries.Volume) > 0 {
+			sb.WriteString(fmt.Sprintf("Volume: %s\n\n", formatFloatSlice(data.IntradaySeries.Volume)))
+		}
+
+		sb.WriteString(fmt.Sprintf("3m ATR (14‑period): %.3f\n\n", data.IntradaySeries.ATR14))
 	}
 
 	if data.LongerTermContext != nil {