test(firstleg): harden pallet option page contract

scripts/admin-test-env-modules/weight-pallet-options-p0-contract.test.mjs

@@ -7,6 +7,7 @@ const read = (relativeUrl) => readFileSync(new URL(relativeUrl, import.meta.url)
 const controller = read('../../firstleg/src/main/java/com/baiyue/firstleg/controller/PlatformInboundMeasurementController.java')
 const service = read('../../firstleg/src/main/java/com/baiyue/firstleg/service/InboundMeasurementService.java')
 const warehouseClient = read('../../firstleg/src/main/java/com/baiyue/firstleg/client/WarehousePalletLocationClient.java')
+const serviceTests = read('../../firstleg/src/test/java/com/baiyue/firstleg/service/InboundMeasurementServiceTest.java')
 const openapi = read('../../firstleg/src/main/resources/openapi/firstleg-v1.yaml')
 const adminApi = read('../../../apps/admin-web/src/modules/inbounds/weight/api/weightOcr.ts')
 const adminPanel = read('../../../apps/admin-web/src/modules/inbounds/weight/components/WeightOcrPanel.vue')
@@ -112,3 +113,16 @@ test('historical pallet snapshot remains read-only visible when it is no longer
   assert.match(cards, /row\.palletTareWeightKg/)
   assert.match(adminBehavior, /(?:historical|history|历史|失去候选|no longer eligible).{0,220}(?:palletCode|托盘编码|TP-)/is)
 })
+
+test('backend detail reads the stored historical pallet snapshot without revalidating current eligibility', () => {
+  assert.match(serviceTests, /detailUsesStoredPalletSnapshotAfterCandidateBecomesUnavailable/)
+  assert.match(serviceTests, /verify\(warehousePallets, never\(\)\)\.palletSnapshot/)
+  assert.match(serviceTests, /verify\(warehousePallets, never\(\)\)\.palletSnapshots/)
+})
+
+test('backend evidence fails closed for Warehouse non-2xx and network errors', () => {
+  assert.match(serviceTests, /weightPalletOptionsFailsClosedOnWarehouseNon2xxResponse/)
+  assert.match(serviceTests, /weightPalletOptionsFailsClosedOnWarehouseNetworkError/)
+  assert.match(serviceTests, /FeignException/)
+  assert.match(serviceTests, /RetryableException/)
+})