fix: treat missing return records as empty results

src/api/return-receipt.js

@@ -16,6 +16,11 @@ function normalizeItem(item = {}) {
 	}
 }
 
+function isNotFound(error) {
+	const code = String(error?.code || '').toUpperCase()
+	return code === 'A0404' || code === '404'
+}
+
 export function normalizeReturnReceiptStart(value = {}) {
 	return {
 		returnNo: String(value.returnNo || ''),
@@ -54,11 +59,22 @@ export function normalizeReturnReceiptResult(value = {}) {
 }
 
 export async function startReturnReceipt(returnNo) {
-	return normalizeReturnReceiptStart(await overseasRequest('POST', `${BASE}/start`, { returnNo: String(returnNo || '').trim() }))
+	try {
+		return normalizeReturnReceiptStart(await overseasRequest('POST', `${BASE}/start`, { returnNo: String(returnNo || '').trim() }))
+	} catch (error) {
+		if (isNotFound(error)) return null
+		throw error
+	}
 }
 
 export async function findReturnSkuCandidates(skuCode) {
-	return normalizeReturnSkuCandidates(await overseasRequest('POST', `${BASE}/sku-candidates`, { skuCode: String(skuCode || '').trim() }))
+	const normalizedSkuCode = String(skuCode || '').trim()
+	try {
+		return normalizeReturnSkuCandidates(await overseasRequest('POST', `${BASE}/sku-candidates`, { skuCode: normalizedSkuCode }))
+	} catch (error) {
+		if (isNotFound(error)) return normalizeReturnSkuCandidates({ skuCode: normalizedSkuCode, candidates: [] })
+		throw error
+	}
 }
 
 export async function confirmReturnReceipt(request) {