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

src/modules/first-leg/store/firstLegOrders.test.mjs

@@ -206,9 +206,9 @@ test('only blocks submission when a known company audit status is not active', (
   assert.match(storeSource, /if \(companyAuditStatus && companyAuditStatus !== 'ACTIVE'\)/)
 })
 
-test('does not expose the out-of-scope cancellation write', () => {
-  assert.doesNotMatch(storeSource, /cancelMerchant|function cancel|\/cancel/)
-  assert.doesNotMatch(apiSource, /\/cancel/)
+test('uses the versioned merchant cancellation contract', () => {
+  assert.match(storeSource, /cancelMerchantFirstLegOrder\(id, pending\.payload, pending\.key\)/)
+  assert.match(apiSource, /cancelMerchantFirstLegOrder\(id: number \| string, payload: \{ expectedVersion: number; reason: string \}, idempotencyKey: string\)/)
 })
 
 test('sends an idempotency key for create and submit writes', () => {