第 4 阶段：订单、交接与账务--1

backend/internal/model/handoff.go

@@ -0,0 +1,24 @@
+package model
+
+import (
+	"time"
+
+	"gorm.io/datatypes"
+)
+
+type HandoffRecord struct {
+	ID                  uint64         `gorm:"primaryKey" json:"id"`
+	OrderID             uint64         `gorm:"not null;index" json:"order_id"`
+	FromUserID          uint64         `gorm:"not null" json:"from_user_id"`
+	ToUserID            uint64         `gorm:"not null" json:"to_user_id"`
+	Type                string         `gorm:"size:32;not null" json:"type"`
+	Content             string         `json:"content"`
+	AttachmentURLS      datatypes.JSON `gorm:"column:attachment_urls" json:"attachment_urls"`
+	ConfirmedByRenterAt *time.Time     `json:"confirmed_by_renter_at"`
+	ConfirmedByOwnerAt  *time.Time     `json:"confirmed_by_owner_at"`
+	CreatedAt           time.Time      `json:"created_at"`
+}
+
+func (HandoffRecord) TableName() string {
+	return "handoff_records"
+}

backend/internal/model/order.go

@@ -0,0 +1,34 @@
+package model
+
+import (
+	"time"
+
+	"gorm.io/datatypes"
+)
+
+type RentalOrder struct {
+	ID               uint64         `gorm:"primaryKey" json:"id"`
+	OrderNo          string         `gorm:"size:64;not null;uniqueIndex" json:"order_no"`
+	ListingID        uint64         `gorm:"not null;index" json:"listing_id"`
+	AccountID        uint64         `gorm:"not null;index" json:"account_id"`
+	OwnerID          uint64         `gorm:"not null;index" json:"owner_id"`
+	RenterID         uint64         `gorm:"not null;index" json:"renter_id"`
+	RentStartAt      *time.Time     `json:"rent_start_at"`
+	RentEndAt        *time.Time     `json:"rent_end_at"`
+	RentHours        int            `gorm:"not null" json:"rent_hours"`
+	RentAmount       float64        `gorm:"type:decimal(12,2);not null;default:0" json:"rent_amount"`
+	DepositAmount    float64        `gorm:"type:decimal(12,2);not null;default:0" json:"deposit_amount"`
+	PlatformFee      float64        `gorm:"type:decimal(12,2);not null;default:0" json:"platform_fee"`
+	AccountSnapshot  datatypes.JSON `json:"account_snapshot"`
+	Status           string         `gorm:"size:32;not null;default:'pending_confirm'" json:"status"`
+	HandoffStatus    string         `gorm:"size:32;not null;default:'none'" json:"handoff_status"`
+	SettlementStatus string         `gorm:"size:32;not null;default:'unsettled'" json:"settlement_status"`
+	OwnerSettledAt   *time.Time     `json:"owner_settled_at"`
+	SettledAt        *time.Time     `json:"settled_at"`
+	CreatedAt        time.Time      `json:"created_at"`
+	UpdatedAt        time.Time      `json:"updated_at"`
+}
+
+func (RentalOrder) TableName() string {
+	return "rental_orders"
+}