fix(first-leg): preserve edit commands and add versioned cancellation

src/modules/first-leg/store/firstLegOrders.ts

@@ -10,6 +10,7 @@ import {
   getMerchantWarehouses,
   submitMerchantFirstLegOrder,
   updateMerchantFirstLegOrder,
+  cancelMerchantFirstLegOrder,
   type ApiFirstLegStatus,
   type FirstLegOrderSaveRequest,
   type MerchantFirstLegOrder,
@@ -468,9 +469,21 @@ function mapWarehouse(item: MerchantWarehouse): ClientWarehouse {
   }
 }
 
+export interface DraftEditSession {
+  readonly orderId: string
+  readonly expectedVersion: number
+}
+
 export const useFirstLegOrdersStore = defineStore('client-first-leg-orders', () => {
   const orders = ref<FirstLegOrder[]>([])
   const pendingSubmitKeys = new Map<string, string>()
+  const pendingEdits = new WeakMap<DraftEditSession, { key: string; payload: { expectedVersion: number; draft: FirstLegOrderSaveRequest } }>()
+  const pendingCancellations = new Map<string, { key: string; payload: { expectedVersion: number; reason: string } }>()
+
+  function beginDraftEdit(detail: FirstLegOrder): DraftEditSession {
+    if (!canClientEditFirstLegOrder(detail.status) || !Number.isSafeInteger(detail.version) || detail.version < 0) throw new Error('请重新打开草稿详情后编辑')
+    return Object.freeze({ orderId: detail.id, expectedVersion: detail.version })
+  }
   const warehouses = ref<ClientWarehouse[]>([])
   const loading = ref(false)
   const loadedFromApi = ref(false)
@@ -588,18 +601,52 @@ export const useFirstLegOrdersStore = defineStore('client-first-leg-orders', ()
     return mapped
   }
 
-  async function saveDraft(draft: FirstLegOrderDraft, customerName: string, id?: string) {
+  async function saveDraft(draft: FirstLegOrderDraft, customerName: string, id?: string, editSession?: DraftEditSession) {
     const warehouse = prepareDraftForSave(draft, warehouses.value)
     if (id) {
-      const order = getById(id)
-      if (!order || !canClientEditFirstLegOrder(order.status)) throw new Error('当前订单状态不允许编辑')
-      await updateMerchantFirstLegOrder(id, savePayload(draft, warehouse, customerName))
-      return loadLegacyDetail(id)
+      if (!editSession || editSession.orderId !== id) throw new Error('请重新打开草稿详情后编辑')
+      const payload = { expectedVersion: editSession.expectedVersion, draft: savePayload(draft, warehouse, customerName) }
+      let pending = pendingEdits.get(editSession)
+      if (pending && JSON.stringify(pending.payload) !== JSON.stringify(payload)) throw new Error('上次保存结果未确认，请重试原内容，或重新打开详情后编辑')
+      // Observe an uncertain previous outcome without replacing its frozen version.
+      if (pending) await getMerchantFirstLegOrder(id)
+      if (!pending) {
+        pending = { key: createIdempotencyKey(`first-leg-edit-${id}`), payload: JSON.parse(JSON.stringify(payload)) }
+        pendingEdits.set(editSession, pending)
+      }
+      await updateMerchantFirstLegOrder(id, pending.payload, pending.key)
+      const saved = await loadLegacyDetail(id)
+      pendingEdits.delete(editSession)
+      return saved
     }
     const createdId = await createMerchantFirstLegOrder(savePayload(draft, warehouse, customerName))
     return loadLegacyDetail(String(createdId))
   }
 
+  async function cancelOrder(id: string, expectedVersion: number, reason: string) {
+    if (!Number.isSafeInteger(expectedVersion) || expectedVersion < 0 || !reason.trim() || reason.trim().length > 500) throw new Error('取消订单需要详情版本及 1–500 字取消原因')
+    const payload = { expectedVersion, reason: reason.trim() }
+    let pending = pendingCancellations.get(id)
+    if (pending && JSON.stringify(pending.payload) !== JSON.stringify(payload)) throw new Error('上次取消结果未确认，请使用原版本和原因重试')
+    if (pending) await getMerchantFirstLegOrder(id)
+    if (!pending) {
+      pending = { key: createIdempotencyKey(`first-leg-cancel-${id}`), payload }
+      pendingCancellations.set(id, pending)
+    }
+    await cancelMerchantFirstLegOrder(id, pending.payload, pending.key)
+    pendingCancellations.delete(id)
+    orders.value = orders.value.filter(order => order.id !== id)
+  }
+
+  async function prepareCancellation(id: string) {
+    const { order } = await getMerchantFirstLegOrder(id)
+    const labels: Record<string, string> = { DRAFT: '草稿', SUBMITTED: '审核中', APPROVED: '已审核', ACCEPTED: '已接单', REJECTED: '已退回' }
+    if (!Object.hasOwn(labels, order.status)) throw new Error('当前订单状态不允许取消，请刷新订单查看最新进度')
+    if (!Number.isSafeInteger(order.version) || order.version < 0) throw new Error('订单版本缺失，请重新加载详情')
+    pendingCancellations.delete(id)
+    return { id, expectedVersion: order.version, businessNo: order.orderNo || order.inboundCode || '—', statusLabel: labels[order.status] }
+  }
+
   async function saveDraftBatch(
     drafts: Array<{ clientRowId: string; draft: FirstLegOrderDraft }>,
     customerName: string,
@@ -621,8 +668,8 @@ export const useFirstLegOrdersStore = defineStore('client-first-leg-orders', ()
     return loadUnifiedDetail(id)
   }
 
-  async function submit(draft: FirstLegOrderDraft, customerName: string, id?: string, companyAuditStatus?: MerchantTenantStatus) {
-    const order = await saveDraft(draft, customerName, id)
+  async function submit(draft: FirstLegOrderDraft, customerName: string, id?: string, companyAuditStatus?: MerchantTenantStatus, editSession?: DraftEditSession) {
+    const order = await saveDraft(draft, customerName, id, editSession)
     return submitSaved(order.id, companyAuditStatus)
   }
 
@@ -630,5 +677,5 @@ export const useFirstLegOrdersStore = defineStore('client-first-leg-orders', ()
     return loadLegacyDetail(id, getById(id))
   }
 
-  return { orders, warehouses, loading, loadedFromApi, loadError, warehouseLoadError, draftLoadError, activeCount, pendingCount, getById, load, loadDetail, loadDraftDetail, loadWarehouseDetail, loadWarehouseType, saveDraft, saveDraftBatch, submitSaved, submit }
+  return { orders, warehouses, loading, loadedFromApi, loadError, warehouseLoadError, draftLoadError, activeCount, pendingCount, getById, load, loadDetail, loadDraftDetail, loadWarehouseDetail, loadWarehouseType, beginDraftEdit, saveDraft, prepareCancellation, cancelOrder, saveDraftBatch, submitSaved, submit }
 })