refactor(adminfront): rename legacy companyCode to tenantSlug across frontend (#426)

adminfront/src/features/users/components/UserBulkMoveGroupModal.tsx

@@ -138,7 +138,7 @@ export function UserBulkMoveGroupModal({
     if (!selectedTenantSlug) return;
     mutation.mutate({
       userIds,
-      companyCode: selectedTenantSlug,
+      tenantSlug: selectedTenantSlug,
       department: selectedGroupName, // can be empty for "No Department"
     } as any);
   };