feat(erp): 添加应付和应收列表的统计信息

- 在ReplyPayableList中添加Count字段用于应付统计
- 新增PayableCount结构体包含金额统计功能
- 在ReplyReceivableList中添加Count字段用于应收统计
- 新增ReceivableCount结构体包含应收、已收和未收金额统计
- 扩展数据返回结构以支持财务统计数据展示

erp/payable.go

@@ -29,6 +29,10 @@ type PayableSearch struct {
 type ReplyPayableList struct {
 	List  []PayableItem `json:"list"`
 	Total int64         `json:"total"`
+	Count PayableCount  `json:"count"`
+}
+type PayableCount struct {
+	Amount decimal.Decimal `json:"amount"`
 }
 type PayableItem struct {
 	Id                int64           `json:"id"`

erp/receivable.go

@@ -28,6 +28,12 @@ type ReceivableSearch struct {
 type ReplyReceivableList struct {
 	List  []ReceivableItem `json:"list"`
 	Total int64            `json:"total"`
+	Count ReceivableCount  `json:"count"`
+}
+type ReceivableCount struct {
+	ReceivableAmount  decimal.Decimal `json:"receivableAmount"`
+	ReceivedAmount    decimal.Decimal `json:"receivedAmount"`
+	OutstandingAmount decimal.Decimal `json:"outstandingAmount"`
 }
 type ReceivableItem struct {
 	Id                int64           `json:"id"`