fix(fleet): normalize nullable maintenance fields before editing

src/modules/overseas-master-data/components/VehicleCareBehavior.test.ts

@@ -29,6 +29,15 @@ function mount(component: object, props: Record<string, unknown>): VueWrapper {
 }
 beforeEach(() => { vi.clearAllMocks(); access.write = true; vi.mocked(api.listVehicleCare).mockResolvedValue({ records: [structuredClone(row)], page: 1, size: 10, total: 1, pages: 1 }) })
 afterEach(() => wrappers.splice(0).forEach(wrapper => wrapper.unmount()))
+it('saving an unchanged record does not create a correction due to JSON property order', async () => {
+  const record = structuredClone(row)
+  record.details = Object.fromEntries(Object.entries(record.details).reverse()) as typeof record.details
+  const wrapper = mount(VehicleCareEditor, { modelValue: false, vehicleId: '71', plate: 'VEH-A', recordType: 'FUEL', record })
+  await wrapper.setProps({ modelValue: true })
+  wrapper.findComponent({ name: 'AppDialog' }).vm.$emit('confirm'); await flushPromises()
+  expect(api.updateVehicleCare).not.toHaveBeenCalled()
+  expect(wrapper.emitted('saved')).toHaveLength(1)
+})
 it('loads care only after the detail tab is selected', async () => {
   vi.mocked(getVehicle).mockResolvedValue({ id: '71', plateNumber: 'VEH-A', model: 'Truck', fuelConsumptionPer100Km: 10, mileageKm: 1000, region: 'OVERSEAS', ownership: 'OWNED', status: 'IN_SERVICE', recordVersion: 0 } as Awaited<ReturnType<typeof getVehicle>>)
   const wrapper = mount(VehicleDetailView, {}); await flushPromises()

src/modules/overseas-master-data/components/VehicleCareEditor.vue

@@ -38,7 +38,7 @@ watch([open, identity], ([value, target], [, previousTarget]) => {
       lastServiceOdometer: null, nextServiceOdometer: null, fuelQuantity: null, fuelUnit: props.recordType === 'FUEL' ? 'L' : null,
       verificationStatus: meterRecord.value ? 'PENDING' : null, remark: null, incident: meterRecord.value ? null
         : { description: '', item: null, place: null, handler: null, processingStatus: 'PENDING', exceptionType: null, reportedCost: null, currency: null } })
-  lastSaved = props.record ? JSON.stringify(props.record.details) : ''
+  lastSaved = props.record ? JSON.stringify(form) : ''
 })
 function selectFiles(event: Event) {
   const element = event.target as HTMLInputElement