feat(listing): 优化优质号主发布与极品专区体验

backend/internal/modules/listing/receive_pricing.go

@@ -49,7 +49,7 @@ func (s *Service) applyMainSiteReceivePricing(ctx context.Context, req *CreateRe
 		return err
 	}
 	applyMainSiteReceivePricing(req, options, config, receiveRatioDelta, receiveCostDelta, onDistributionSite)
-	return nil
+	return validateQualityOwnerPricingMode(req, onDistributionSite)
 }
 
 func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.PublishOptionsDTO, config salePriceConfig, receiveRatioDelta, receiveCostDelta float64, onDistributionSite bool) {
@@ -71,9 +71,16 @@ func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.Publis
 	if requestedRatio <= 0 {
 		requestedRatio = readSummaryNumber(breakdown["accelerated_sale_ratio"])
 	}
+	minSaleRatio := referenceRatio
+	if req.OwnerIsQualityOwner {
+		minSaleRatio = roundRatio(referenceRatio - NormalizeQualityOwnerRatioDiscount(options.RatioConfig.QualityOwnerRatioDiscount))
+		if minSaleRatio < minSiteReceiveRatio {
+			minSaleRatio = minSiteReceiveRatio
+		}
+	}
 	costDelta := NormalizeSiteReceiveCostDelta(receiveCostDelta)
 	ratioDelta := NormalizeSiteReceiveRatioDelta(receiveRatioDelta)
-	sellerRatio := clampSaleRatio(referenceRatio, requestedRatio)
+	sellerRatio := clampSaleRatio(referenceRatio, requestedRatio, minSaleRatio)
 	// 分站新口径：收号比例 = R + 压价点数（收号价更低），买家定价锚定主站参考比例 R，不随收号价联动。
 	if onDistributionSite {
 		sellerRatio = ApplySiteReceiveCostDelta(referenceRatio, costDelta)
@@ -98,6 +105,10 @@ func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.Publis
 	breakdown["consumable_price"] = consumablePrice
 	breakdown["daily_loss_ratio_adjustment"] = calculateDailyLossRatioAdjustment(dailyLoss)
 	breakdown["accelerated_sale_ratio"] = sellerRatio
+	if sellerRatio < referenceRatio {
+		breakdown["quality_owner_ratio_discount"] = roundRatio(referenceRatio - sellerRatio)
+		breakdown["pricing_mode"] = "quality_owner_exclusive"
+	}
 	if onDistributionSite {
 		breakdown["site_receive_cost_delta"] = costDelta
 		breakdown["pricing_model"] = "site_cost_decoupled_v1"
@@ -114,6 +125,18 @@ func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.Publis
 	req.PriceCent = yuanToCent(pricing.BuyerTotalPrice)
 }
 
+func validateQualityOwnerPricingMode(req *CreateRequest, onDistributionSite bool) error {
+	if req == nil || onDistributionSite || !req.OwnerIsQualityOwner || req.IsPremium {
+		return nil
+	}
+	breakdown := ensurePriceBreakdown(req.AssetSummary)
+	if readSummaryNumber(breakdown["seller_ratio"]) <
+		readSummaryNumber(breakdown["seller_reference_ratio"]) {
+		return ErrQualityRatioPremiumOnly
+	}
+	return nil
+}
+
 // NormalizeSiteReceiveCostDelta 将分站收号压价点数限制在 [0, 20]。
 // 点数越大，分站收号比例越高（相对主站参考比例），收号价越低；0 表示与主站同价收号。
 func NormalizeSiteReceiveCostDelta(delta float64) float64 {
@@ -136,6 +159,17 @@ func ApplySiteReceiveCostDelta(referenceRatio, delta float64) float64 {
 	return siteRatio
 }
 
+// NormalizeQualityOwnerRatioDiscount 限制优质号主专享比例下调值，默认 1、最大 10。
+func NormalizeQualityOwnerRatioDiscount(value float64) float64 {
+	if value < 0 || math.IsNaN(value) || math.IsInf(value, 0) {
+		return 0
+	}
+	if value > maxAcceleratedSaleRatioIncrement {
+		return maxAcceleratedSaleRatioIncrement
+	}
+	return roundRatio(value)
+}
+
 // referenceSellerCoinBasePrice 计算主站参考比例下的号主基础价，用作买家定价锚点。
 func referenceSellerCoinBasePrice(coinWan, referenceRatio float64) float64 {
 	if referenceRatio <= 0 {
@@ -182,7 +216,7 @@ func (s *Service) publishRatioOptions(ctx context.Context) (systemconfig.Publish
 	if strings.TrimSpace(value) == "" {
 		return options, nil
 	}
-	var parsed systemconfig.PublishOptionsDTO
+	parsed := options
 	if err := json.Unmarshal([]byte(value), &parsed); err != nil {
 		return options, nil
 	}
@@ -225,13 +259,13 @@ func calculateSellerReferenceRatio(coinM float64, summary map[string]any, option
 		calculateDailyLossRatioAdjustment(dailyLoss)
 }
 
-func clampSaleRatio(referenceRatio, requestedRatio float64) float64 {
+func clampSaleRatio(referenceRatio, requestedRatio, minRatio float64) float64 {
 	maxRatio := roundRatio(referenceRatio + maxAcceleratedSaleRatioIncrement)
 	if requestedRatio <= 0 {
 		return referenceRatio
 	}
-	if requestedRatio < referenceRatio {
-		return referenceRatio
+	if requestedRatio < minRatio {
+		return minRatio
 	}
 	if requestedRatio > maxRatio {
 		return maxRatio