实现租客成长等级并优化展示

backend/internal/modules/order/checkout_finalize.go

@@ -5,6 +5,7 @@ import (
 
 	"hfb_sys/backend/internal/model"
 	"hfb_sys/backend/internal/modules/notification"
+	"hfb_sys/backend/internal/modules/rentergrowth"
 	"hfb_sys/backend/internal/modules/wallet"
 
 	"gorm.io/gorm"
@@ -42,6 +43,9 @@ func (r *Repository) finalizeCheckout(tx *gorm.DB, order *model.RentalOrder, che
 	if err := appendCheckoutCompletedNotifications(tx, order, renterContent); err != nil {
 		return nil, err
 	}
+	if err := rentergrowth.AwardOrderCompleted(tx, order, settlement.ActualRentAmountCent, rentergrowth.SourceOrderCompleted); err != nil {
+		return nil, err
+	}
 	if err := saveFinalizedCheckout(tx, order, checkout, listing, account); err != nil {
 		return nil, err
 	}

backend/internal/modules/order/dto.go

@@ -32,6 +32,13 @@ type OrderDTO struct {
 	DepositOriginalAmountCent   int64             `json:"deposit_original_amount_cent"`
 	DepositWaivedAmountCent     int64             `json:"deposit_waived_amount_cent"`
 	PlatformFeeCent             *int64            `json:"platform_fee_cent,omitempty"`
+	RentOriginalAmountCent      int64             `json:"rent_original_amount_cent,omitempty"`
+	RentDiscountAmountCent      int64             `json:"rent_discount_amount_cent,omitempty"`
+	RenterGrowthLevel           string            `json:"renter_growth_level,omitempty"`
+	RenterGrowthLevelName       string            `json:"renter_growth_level_name,omitempty"`
+	RenterDiscountBps           int               `json:"renter_discount_bps,omitempty"`
+	GrowthPointsAwarded         int64             `json:"growth_points_awarded,omitempty"`
+	GrowthPointsAwardedAt       *time.Time        `json:"growth_points_awarded_at,omitempty"`
 	AccountSnapshot             datatypes.JSON    `json:"account_snapshot"`
 	Status                      string            `json:"status"`
 	HandoffStatus               string            `json:"handoff_status"`

backend/internal/modules/order/lifecycle.go

@@ -8,6 +8,7 @@ import (
 	"hfb_sys/backend/internal/model"
 	"hfb_sys/backend/internal/modules/chat"
 	"hfb_sys/backend/internal/modules/notification"
+	"hfb_sys/backend/internal/modules/rentergrowth"
 
 	"gorm.io/datatypes"
 	"gorm.io/gorm"
@@ -42,6 +43,16 @@ func (r *Repository) Create(ctx context.Context, renterID uint64, req CreateRequ
 		}
 		rentHours := estimateOrderDurationHours(snapshot)
 		pricing := buildOrderPricing(listing, account)
+		rentOriginalAmountCent := pricing.RentAmountCent
+		growthSnapshot, err := rentergrowth.SnapshotForUser(tx, renterID)
+		if err != nil {
+			return err
+		}
+		rentDiscountAmountCent := rentergrowth.CalculateDiscountCent(rentOriginalAmountCent, pricing.PlatformFeeCent, growthSnapshot.DiscountBps)
+		if rentDiscountAmountCent > 0 {
+			pricing.PlatformFeeCent -= rentDiscountAmountCent
+			pricing.RentAmountCent -= rentDiscountAmountCent
+		}
 		depositOriginalAmountCent := listing.DepositAmountCent
 		paidDepositAmountCent, waivedDepositAmountCent, err := r.depositAmountsForOrder(tx, renterID, depositOriginalAmountCent)
 		if err != nil {
@@ -60,6 +71,11 @@ func (r *Repository) Create(ctx context.Context, renterID uint64, req CreateRequ
 			DepositOriginalAmountCent: depositOriginalAmountCent,
 			DepositWaivedAmountCent:   waivedDepositAmountCent,
 			PlatformFeeCent:           pricing.PlatformFeeCent,
+			RentOriginalAmountCent:    rentOriginalAmountCent,
+			RentDiscountAmountCent:    rentDiscountAmountCent,
+			RenterGrowthLevel:         growthSnapshot.LevelCode,
+			RenterGrowthLevelName:     growthSnapshot.LevelName,
+			RenterDiscountBps:         growthSnapshot.DiscountBps,
 			AccountSnapshot:           snapshot,
 			Status:                    orderStatusPendingPayment,
 			HandoffStatus:             handoffStatusNone,

backend/internal/modules/order/presenter.go

@@ -82,6 +82,13 @@ func (row orderRow) toAdminDTO() OrderDTO {
 		DepositOriginalAmountCent:   effectiveDepositOriginalAmountCent(row.RentalOrder),
 		DepositWaivedAmountCent:     row.DepositWaivedAmountCent,
 		PlatformFeeCent:             &platformFeeCent,
+		RentOriginalAmountCent:      effectiveRentOriginalAmountCent(row.RentalOrder),
+		RentDiscountAmountCent:      row.RentDiscountAmountCent,
+		RenterGrowthLevel:           effectiveRenterGrowthLevel(row.RentalOrder),
+		RenterGrowthLevelName:       effectiveRenterGrowthLevelName(row.RentalOrder),
+		RenterDiscountBps:           effectiveRenterDiscountBps(row.RentalOrder),
+		GrowthPointsAwarded:         row.GrowthPointsAwarded,
+		GrowthPointsAwardedAt:       row.GrowthPointsAwardedAt,
 		AccountSnapshot:             row.AccountSnapshot,
 		Status:                      row.Status,
 		HandoffStatus:               row.HandoffStatus,
@@ -154,6 +161,34 @@ func effectiveDepositOriginalAmountCent(order model.RentalOrder) int64 {
 	return order.DepositAmountCent
 }
 
+func effectiveRentOriginalAmountCent(order model.RentalOrder) int64 {
+	if order.RentOriginalAmountCent > 0 {
+		return order.RentOriginalAmountCent
+	}
+	return order.RentAmountCent + order.RentDiscountAmountCent
+}
+
+func effectiveRenterGrowthLevel(order model.RentalOrder) string {
+	if order.RenterGrowthLevel != "" {
+		return order.RenterGrowthLevel
+	}
+	return "normal"
+}
+
+func effectiveRenterGrowthLevelName(order model.RentalOrder) string {
+	if order.RenterGrowthLevelName != "" {
+		return order.RenterGrowthLevelName
+	}
+	return "普通"
+}
+
+func effectiveRenterDiscountBps(order model.RentalOrder) int {
+	if order.RenterDiscountBps > 0 {
+		return order.RenterDiscountBps
+	}
+	return 10000
+}
+
 func toCheckoutAdminDTO(checkout model.OrderCheckout) CheckoutDTO {
 	rentAmountCent := checkout.RentAmountCent
 	ownerRentAmountCent := checkout.OwnerRentAmountCent
@@ -275,6 +310,13 @@ func applyOrderPriceView(dto *OrderDTO, order model.RentalOrder, userID uint64)
 		dto.DisplayAmountCent = ownerAmountCent
 		dto.RentAmountCent = nil
 		dto.OwnerRentAmountCent = &ownerAmountCent
+		dto.RentOriginalAmountCent = 0
+		dto.RentDiscountAmountCent = 0
+		dto.RenterGrowthLevel = ""
+		dto.RenterGrowthLevelName = ""
+		dto.RenterDiscountBps = 0
+		dto.GrowthPointsAwarded = 0
+		dto.GrowthPointsAwardedAt = nil
 		sanitizeOrderSnapshot(&dto.AccountSnapshot, "owner")
 	case userID == order.RenterID:
 		rentAmountCent := order.RentAmountCent
@@ -282,12 +324,24 @@ func applyOrderPriceView(dto *OrderDTO, order model.RentalOrder, userID uint64)
 		dto.DisplayAmountCent = rentAmountCent
 		dto.RentAmountCent = &rentAmountCent
 		dto.OwnerRentAmountCent = nil
+		dto.RentOriginalAmountCent = effectiveRentOriginalAmountCent(order)
+		dto.RentDiscountAmountCent = order.RentDiscountAmountCent
+		dto.RenterGrowthLevel = effectiveRenterGrowthLevel(order)
+		dto.RenterGrowthLevelName = effectiveRenterGrowthLevelName(order)
+		dto.RenterDiscountBps = effectiveRenterDiscountBps(order)
 		sanitizeOrderSnapshot(&dto.AccountSnapshot, "renter")
 	default:
 		dto.PriceRole = ""
 		dto.DisplayAmountCent = 0
 		dto.RentAmountCent = nil
 		dto.OwnerRentAmountCent = nil
+		dto.RentOriginalAmountCent = 0
+		dto.RentDiscountAmountCent = 0
+		dto.RenterGrowthLevel = ""
+		dto.RenterGrowthLevelName = ""
+		dto.RenterDiscountBps = 0
+		dto.GrowthPointsAwarded = 0
+		dto.GrowthPointsAwardedAt = nil
 		sanitizeOrderSnapshot(&dto.AccountSnapshot, "")
 	}
 }

backend/internal/modules/order/repository_integration_test.go

@@ -140,6 +140,65 @@ func TestRepositoryCreateOrderRejectsOwnListing(t *testing.T) {
 	}
 }
 
+func TestRepositoryCreateAppliesRenterGrowthDiscount(t *testing.T) {
+	db := setupOrderTestDB(t)
+	repo := NewRepository(db)
+
+	owner := model.User{Phone: "13800001101"}
+	renter := model.User{
+		Phone:              "13800001102",
+		RenterGrowthPoints: 300,
+		RenterGrowthLevel:  "platinum",
+	}
+	if err := db.Create(&owner).Error; err != nil {
+		t.Fatalf("create owner failed: %v", err)
+	}
+	if err := db.Create(&renter).Error; err != nil {
+		t.Fatalf("create renter failed: %v", err)
+	}
+	account := model.GameAccount{
+		OwnerID:       owner.ID,
+		ServerRegion:  "国服",
+		LoginPlatform: "steam",
+		Title:         "测试账号",
+		AssetSummary:  datatypes.JSON([]byte(`{"price_breakdown":{"seller_total_price":90,"platform_markup_amount":10}}`)),
+	}
+	if err := db.Create(&account).Error; err != nil {
+		t.Fatalf("create account failed: %v", err)
+	}
+	listing := model.RentalListing{
+		AccountID:    account.ID,
+		OwnerID:      owner.ID,
+		PriceCent:    10000,
+		Status:       listingStatusPublished,
+		ReviewStatus: listingReviewStatusApproved,
+	}
+	if err := db.Create(&listing).Error; err != nil {
+		t.Fatalf("create listing failed: %v", err)
+	}
+
+	dto, err := repo.Create(t.Context(), renter.ID, CreateRequest{ListingID: listing.ID})
+	if err != nil {
+		t.Fatalf("Create() error = %v", err)
+	}
+	if dto.RentAmountCent == nil || *dto.RentAmountCent != 9900 {
+		t.Fatalf("rent amount = %v, want 9900", dto.RentAmountCent)
+	}
+	if dto.RentOriginalAmountCent != 10000 || dto.RentDiscountAmountCent != 100 {
+		t.Fatalf("discount snapshot = original %d discount %d, want 10000/100", dto.RentOriginalAmountCent, dto.RentDiscountAmountCent)
+	}
+	if dto.RenterGrowthLevel != "platinum" || dto.RenterGrowthLevelName != "铂金" || dto.RenterDiscountBps != 9900 {
+		t.Fatalf("growth snapshot = %s/%s/%d, want platinum/铂金/9900", dto.RenterGrowthLevel, dto.RenterGrowthLevelName, dto.RenterDiscountBps)
+	}
+	var saved model.RentalOrder
+	if err := db.First(&saved, dto.ID).Error; err != nil {
+		t.Fatalf("find saved order failed: %v", err)
+	}
+	if saved.OwnerRentAmountCent != 9000 || saved.PlatformFeeCent != 900 {
+		t.Fatalf("pricing = owner %d platform %d, want 9000/900", saved.OwnerRentAmountCent, saved.PlatformFeeCent)
+	}
+}
+
 // TestBuildOrderPricing 测试订单定价计算
 func TestBuildOrderPricingBasic(t *testing.T) {
 	listing := model.RentalListing{