fix(approve): 修复审批流程为空时的异常处理

liyong

2026-04-30 c2ad2126d6f8423e0a5e6e20bbb91ef6bb1cffc0

 src/main/java/com/ruoyi/sales/dto/InvoiceRegistrationDto.java

@@ -23,4 +23,7 @@
    @ApiModelProperty(name = "合同金额")
    private BigDecimal contractAmount;

    @ApiModelProperty(name = "未开票金额")
    private BigDecimal noInvoiceAmountTotal;

}