优化报销管理增加挂靠

go/models/reimburse.go

@@ -84,6 +84,10 @@ type BackendReimbursementItem struct {
 	ReceiptFileIDs string `orm:"column(receipt_file_ids);size(500)" json:"receipt_file_ids"`
 	ReceiptURLs    string `orm:"column(receipt_urls);size(500)" json:"receipt_urls"`
 	ReceiptAmounts string `orm:"column(receipt_amounts);size(500)" json:"receipt_amounts"`
+	// 发票挂靠：一张票可分数次报销，这里记录本条明细挂靠的发票文件与本次使用金额。
+	// 发票余额由后端按「票面金额 - 各明细占用」实时聚合，不额外存余额字段。
+	InvoiceFileID    uint64  `orm:"column(invoice_file_id);default(0)" json:"invoice_file_id"`
+	InvoiceUseAmount float64 `orm:"column(invoice_use_amount);type(decimal);digits(10);decimals(2);default(0)" json:"invoice_use_amount"`
 	IsDeleted       int8       `orm:"column(is_deleted);default(0)" json:"is_deleted"`
 	CreateTime      time.Time  `orm:"column(create_time);auto_now_add;type(datetime)" json:"create_time"`
 	UpdateTime      *time.Time `orm:"column(update_time);null;type(datetime)" json:"update_time"`