the cleanup

types/merchant.ts

@@ -0,0 +1,10 @@
+export type MerchantAdminDto = {
+    id?: number; // Optional for create payloads
+    name: string;
+    avantlinkMid?: string | null;
+    feedUrl?: string | null;
+    offerFeedUrl?: string | null;
+    isActive?: boolean | null;
+    lastFullImportAt?: string | null; // Spring Instant/LocalDateTime serialized as string
+    lastOfferSyncAt?: string | null;
+};