fix(listing): 主站加速出售买家价不再误锚到参考比例

分站解耦只应改分站收号侧；主站加速出售仍跟卖家比例联动买家价，并同步分销后台列表与发布页文案。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/internal/modules/listing/receive_pricing.go

@@ -83,8 +83,14 @@ func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.Publis
 	consumablePrice := consumableValue(req.AssetSummary)
 	sellerTotalPrice := roundMoney(sellerCoinBasePrice + consumablePrice)
 	dailyLoss := readSummaryNumber(req.AssetSummary["daily_loss_m"])
-	// 买家价始终按主站口径推导：分站只改收号侧，卖价与主站同基准（压价差进入三方分成池）。
-	pricing := calculateExternalPlatformPricing(coinM, referenceRatio, referenceSellerCoinBasePrice(coinWan, referenceRatio), consumablePrice, config)
+	// 主站买家价仍跟 sellerRatio（含加速出售）；分站买家价锚定 R，压价差进入三方分成池。
+	buyerAnchorRatio := sellerRatio
+	buyerAnchorCoinBase := sellerCoinBasePrice
+	if onDistributionSite {
+		buyerAnchorRatio = referenceRatio
+		buyerAnchorCoinBase = referenceSellerCoinBasePrice(coinWan, referenceRatio)
+	}
+	pricing := calculateExternalPlatformPricing(coinM, buyerAnchorRatio, buyerAnchorCoinBase, consumablePrice, config)
 	breakdown["seller_reference_ratio"] = referenceRatio
 	breakdown["seller_ratio"] = sellerRatio
 	breakdown["seller_coin_base_price"] = sellerCoinBasePrice

backend/internal/modules/listing/receive_pricing_test.go

@@ -69,6 +69,16 @@ func TestApplyMainSiteReceivePricingKeepsAcceleratedRatioWithinMainSiteRange(t *
 	if readSummaryNumber(breakdown["seller_reference_ratio"]) != 43 {
 		t.Fatalf("seller_reference_ratio = %v, want 43", breakdown["seller_reference_ratio"])
 	}
+	if got := readSummaryNumber(breakdown["seller_coin_base_price"]); got != 200 {
+		t.Fatalf("accelerated seller_coin_base_price = %v, want 200", got)
+	}
+	// 主站加速出售买卖仍联动：买家比例 = 50 − 5 = 45，不能被误锚到参考比例 38。
+	if readSummaryNumber(breakdown["buyer_ratio"]) != 45 {
+		t.Fatalf("accelerated buyer_ratio = %v, want 45 (follows seller ratio, not reference 38)", breakdown["buyer_ratio"])
+	}
+	if req.PriceCent != 22220 {
+		t.Fatalf("accelerated PriceCent = %d, want 22220", req.PriceCent)
+	}
 }
 
 func TestDistributionReceiveCostDeltaZeroKeepsMainSitePrice(t *testing.T) {

backend/internal/modules/listing/service_test.go

@@ -1172,6 +1172,9 @@ func TestCreateDistributionListingAppliesSiteReceiveCostDelta(t *testing.T) {
 	if pricing.SellerRatio != 46 {
 		t.Fatalf("seller_ratio = %v, want 46 after site cost delta 3 (R=43+3) under decoupled model", pricing.SellerRatio)
 	}
+	if dto.PriceCent != 26320 {
+		t.Fatalf("listing PriceCent = %d, want 26320 (buyer price stays anchored to main-site R)", dto.PriceCent)
+	}
 }
 
 func mustMarshalSummary(t *testing.T, summary map[string]any) []byte {