Add region code support

distribution_fe/lib/api/master.ts

@@ -84,6 +84,7 @@ export interface PageParams {
 
 export interface RegionBody {
   name: string
+  code?: string
   isActive?: boolean
 }
 
@@ -91,6 +92,9 @@ export const regions = {
   list: (params?: PageParams) =>
     api.get<PaginatedResponse<RegionResponse>>('/regions', { params }).then(r => r.data),
 
+  nextCode: () =>
+    api.get<{ code: string }>('/regions/next-code').then(r => r.data),
+
   get: (id: string) =>
     api.get<RegionResponse>(`/regions/${id}`).then(r => r.data),