feat：完善项目信息

app/common/model/user_bill.go

@@ -0,0 +1,18 @@
+package model
+
+// UserBill 用户账单数据模型
+type UserBill struct {
+	Model
+	UID    uint64 `gorm:"column:uid;type:int;default:0;comment:用户uuid" json:"-"`
+	BillID uint64 `gorm:"column:bill_id;type:int(11);default:0;comment:账单ID" json:"bill_id"`
+	ModelDeleted
+	ModelAt
+}
+
+func (m *UserBill) TableName() string {
+	return "user_bill"
+}
+
+func NewUserBill() *UserBill {
+	return &UserBill{}
+}