refactor: rename and relocate HasModelBillingConfig function for clarity

relay/helper/price.go

@@ -2,6 +2,7 @@ package helper
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/QuantumNous/new-api/common"
 	"github.com/QuantumNous/new-api/logger"
@@ -223,8 +224,18 @@ func ModelPriceHelperPerCall(c *gin.Context, info *relaycommon.RelayInfo) (types
 	return priceData, nil
 }
 
-func ContainPriceOrRatio(modelName string) bool {
-	return model.HasModelBillingConfig(modelName)
+func HasModelBillingConfig(modelName string) bool {
+	if _, ok := ratio_setting.GetModelPrice(modelName, false); ok {
+		return true
+	}
+	if _, ok, _ := ratio_setting.GetModelRatio(modelName); ok {
+		return true
+	}
+	if billing_setting.GetBillingMode(modelName) != billing_setting.BillingModeTieredExpr {
+		return false
+	}
+	expr, ok := billing_setting.GetBillingExpr(modelName)
+	return ok && strings.TrimSpace(expr) != ""
 }
 
 func modelPriceHelperTiered(c *gin.Context, info *relaycommon.RelayInfo, promptTokens int, meta *types.TokenCountMeta, groupRatioInfo types.GroupRatioInfo) (types.PriceData, error) {