fix: align client integration contracts

src/api/partners.ts

@@ -1,6 +1,6 @@
 import { apiRequest } from '@/api/http'
 
-export type MerchantPartnerType = 'SENDER' | 'RECEIVER'
+export type MerchantPartnerType = 'CUSTOMER' | 'SUPPLIER' | 'BOTH'
 
 export interface MerchantPartner {
   id: number | string
@@ -19,7 +19,7 @@ export interface MerchantPartner {
   status: 'ACTIVE' | 'INACTIVE' | 'DISABLED' | string
 }
 
-export function getMerchantPartnerCandidates(type: MerchantPartnerType, keyword?: string) {
+export function getMerchantPartnerCandidates(type?: MerchantPartnerType, keyword?: string) {
   return apiRequest<MerchantPartner[]>({
     method: 'GET',
     url: '/merchant/v1/partners/candidates',