fix(client): read all customs order pages with bounded concurrency

src/modules/first-leg/utils/customsDocumentsReader.ts

@@ -0,0 +1,52 @@
+import { getMerchantUnifiedOrders } from '../api/unifiedOrders'
+import { getMerchantCustomsForOrder, isMerchantCustomsUnavailable, type MerchantCustomsContainer } from '../api/customs'
+import { isCustomsOrderCandidate } from './customsEligibility'
+
+export interface CustomsDocumentRow {
+  order: { id: string; orderNo: string | null; businessSummary: { inboundCode: string } }
+  detail: MerchantCustomsContainer
+}
+
+// Isolated from the shared order store: scan sequential pages, with at most
+// four document requests in flight. Inconsistent pagination must be visible.
+export async function readCustomsDocuments() {
+  const records: CustomsDocumentRow[] = []
+  const seen = new Set<string>()
+  let expectedTotal: number | undefined
+  let failedCount = 0
+  const size = 200
+  for (let page = 1; ; page += 1) {
+    const response = await getMerchantUnifiedOrders({ page, size })
+    const total = Number(response.total)
+    const pages = Number(response.pages)
+    if (!Number.isSafeInteger(total) || total < 0 || Number(response.page) !== page
+      || Number(response.size) !== size || pages !== Math.ceil(total / size)
+      || (expectedTotal !== undefined && total !== expectedTotal)
+      || response.records.length !== Math.min(size, Math.max(0, total - (page - 1) * size))) {
+      throw new Error('订单分页数据不完整或已变化，请重新加载报关资料')
+    }
+    expectedTotal = total
+    for (const row of response.records) {
+      const id = String(row.orderId)
+      if (seen.has(id)) throw new Error('订单分页存在重复记录，请重新加载报关资料')
+      seen.add(id)
+    }
+    const candidates = response.records.filter(row => isCustomsOrderCandidate({ status: row.mainStatus, taxMode: row.taxMode ?? 'BUY_DECLARATION' }))
+    for (let offset = 0; offset < candidates.length; offset += 4) {
+      const results = await Promise.all(candidates.slice(offset, offset + 4).map(async row => {
+        const id = String(row.orderId)
+        try {
+          const detail = await getMerchantCustomsForOrder(id)
+          if (!detail.inbounds.some(item => item.orderId === id && item.taxMode === 'TAX_REFUND')) return null
+          return { order: { id, orderNo: row.orderNo, businessSummary: { inboundCode: row.inboundCode ?? '' } }, detail }
+        } catch (error) {
+          if (!isMerchantCustomsUnavailable(error)) failedCount += 1
+          return null
+        }
+      }))
+      for (const result of results) if (result) records.push(result)
+    }
+    if (page >= pages) break
+  }
+  return { records, failedCount }
+}