实现租客成长等级并优化展示

backend/internal/model/order.go

@@ -22,6 +22,13 @@ type RentalOrder struct {
 	DepositOriginalAmountCent   int64          `gorm:"not null;default:0" json:"-"`
 	DepositWaivedAmountCent     int64          `gorm:"not null;default:0" json:"-"`
 	PlatformFeeCent             int64          `gorm:"not null;default:0" json:"-"`
+	RentOriginalAmountCent      int64          `gorm:"not null;default:0" json:"-"`
+	RentDiscountAmountCent      int64          `gorm:"not null;default:0" json:"-"`
+	RenterGrowthLevel           string         `gorm:"size:32;not null;default:'normal'" json:"renter_growth_level"`
+	RenterGrowthLevelName       string         `gorm:"size:32;not null;default:'普通'" json:"renter_growth_level_name"`
+	RenterDiscountBps           int            `gorm:"not null;default:10000" json:"renter_discount_bps"`
+	GrowthPointsAwarded         int64          `gorm:"not null;default:0" json:"growth_points_awarded"`
+	GrowthPointsAwardedAt       *time.Time     `json:"growth_points_awarded_at"`
 	AccountSnapshot             datatypes.JSON `json:"account_snapshot"`
 	Status                      string         `gorm:"size:32;not null;default:'pending_payment'" json:"status"`
 	HandoffStatus               string         `gorm:"size:32;not null;default:'none'" json:"handoff_status"`

backend/internal/model/renter_growth.go

@@ -0,0 +1,22 @@
+package model
+
+import "time"
+
+// RenterGrowthLedger 记录租客成长积分变动流水，便于排查订单完成后的积分发放。
+type RenterGrowthLedger struct {
+	ID           uint64    `gorm:"primaryKey" json:"id"`
+	UserID       uint64    `gorm:"not null;index" json:"user_id"`
+	OrderID      uint64    `gorm:"not null;default:0;index;uniqueIndex:uk_renter_growth_order_source,priority:1" json:"order_id"`
+	Points       int64     `gorm:"not null;default:0" json:"points"`
+	BeforePoints int64     `gorm:"not null;default:0" json:"before_points"`
+	AfterPoints  int64     `gorm:"not null;default:0" json:"after_points"`
+	BeforeLevel  string    `gorm:"size:32;not null;default:'normal'" json:"before_level"`
+	AfterLevel   string    `gorm:"size:32;not null;default:'normal'" json:"after_level"`
+	Source       string    `gorm:"size:32;not null;default:'order_completed';uniqueIndex:uk_renter_growth_order_source,priority:2" json:"source"`
+	Remark       string    `gorm:"size:255;not null;default:''" json:"remark"`
+	CreatedAt    time.Time `json:"created_at"`
+}
+
+func (RenterGrowthLedger) TableName() string {
+	return "renter_growth_ledger"
+}

backend/internal/model/user.go

@@ -12,6 +12,8 @@ type User struct {
 	RiskStatus           string     `gorm:"size:32;not null;default:'normal'" json:"risk_status"`
 	CreditScore          int        `gorm:"not null;default:100" json:"credit_score"`
 	DepositFreeQuotaCent int64      `gorm:"not null;default:0" json:"-"`
+	RenterGrowthPoints   int64      `gorm:"not null;default:0;index:idx_users_renter_growth_level,priority:2" json:"renter_growth_points"`
+	RenterGrowthLevel    string     `gorm:"size:32;not null;default:'normal';index:idx_users_renter_growth_level,priority:1" json:"renter_growth_level"`
 	Status               string     `gorm:"size:32;not null;default:'active'" json:"status"`
 	LastLoginAt          *time.Time `json:"last_login_at"`
 	CreatedAt            time.Time  `json:"created_at"`