style: add perf rules (#5413)

packages/frontend/i18n/src/index.ts

@@ -45,10 +45,9 @@ export function useI18N() {
   return i18n;
 }
 
-const resources = LOCALES.reduce<Resource>(
-  (acc, { tag, res }) => ({ ...acc, [tag]: { translation: res } }),
-  {}
-);
+const resources = LOCALES.reduce<Resource>((acc, { tag, res }) => {
+  return Object.assign(acc, { [tag]: { translation: res } });
+}, {});
 
 const fallbackLng = 'en';
 const standardizeLocale = (language: string) => {

packages/frontend/i18n/src/scripts/utils.ts

@@ -27,9 +27,9 @@ export const flattenTranslation = (
   if (!(obj instanceof Object)) return { [path ?? '']: obj };
 
   return Object.keys(obj).reduce((output, key) => {
-    return {
-      ...output,
-      ...flattenTranslation(obj[key], path ? path + '.' + key : key),
-    };
+    return Object.assign(
+      output,
+      flattenTranslation(obj[key], path ? path + '.' + key : key)
+    );
   }, {});
 };