Various little adjustments relative to the new i18n API

stories/account/i18n.ts

@@ -1,5 +1,9 @@
-import { createUseI18n } from "../../dist/account";
+import { i18nInitializer } from "../../dist/account";
+import type { ThemeName } from "../kc.gen";
 
-export const { useI18n, ofTypeI18n } = createUseI18n({});
+export const { useI18n, ofTypeI18n } = i18nInitializer
+    .withThemeName<ThemeName>()
+    .withCustomTranslations({})
+    .create();
 
 export type I18n = typeof ofTypeI18n;