🐛 修复车务非必填-1展示，并完善总单调度与运单表单体验

调度页限制上一段到达后才可调度；司机候选项点击展开；车务多模块-1显示为空；同步配载/总单编辑与导入相关优化。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/option/vehicle/mileage-record.js

@@ -1,6 +1,7 @@
 import { formatUpdateUserName } from '@/utils/audit';
 
-const isEmpty = value => value === undefined || value === null || value === '';
+const isEmpty = value =>
+  value === undefined || value === null || value === '' || Number(value) === -1;
 
 const validateNonNegative = (rule, value, callback) => {
   if (isEmpty(value)) {
@@ -12,6 +13,8 @@ const validateNonNegative = (rule, value, callback) => {
   }
 };
 
+const formatEmptySentinel = (row, value) => (isEmpty(value) ? '' : value);
+
 export const option = {
   height: 'auto',
   calcHeight: 32,
@@ -60,6 +63,7 @@ export const option = {
       append: 'km',
       minWidth: 210,
       slot: true,
+      formatter: formatEmptySentinel,
       rules: [{ validator: validateNonNegative, trigger: 'blur' }],
     },
     {
@@ -70,6 +74,7 @@ export const option = {
       append: 'km',
       minWidth: 210,
       slot: true,
+      formatter: formatEmptySentinel,
       rules: [{ validator: validateNonNegative, trigger: 'blur' }],
     },
     {
@@ -80,6 +85,7 @@ export const option = {
       append: 'km',
       minWidth: 170,
       slot: true,
+      formatter: formatEmptySentinel,
       rules: [{ validator: validateNonNegative, trigger: 'blur' }],
     },
     {
@@ -90,6 +96,7 @@ export const option = {
       append: 'km',
       minWidth: 170,
       slot: true,
+      formatter: formatEmptySentinel,
       rules: [{ validator: validateNonNegative, trigger: 'blur' }],
     },
     {