Index: frontend/node_modules/safe-array-concat/index.d.ts
===================================================================
--- frontend/node_modules/safe-array-concat/index.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/safe-array-concat/index.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,6 @@
+declare function safeArrayConcat<T = unknown>(
+    item: T | readonly T[],
+    ...items: (T | readonly T[])[],
+): T[];
+
+export = safeArrayConcat;