Add admin site settings sections and locale defaults

lib/site-icons.tsx

@@ -1,8 +1,6 @@
 import { readFile } from "fs/promises";
 import path from "path";
 
-import { routing } from "@/i18n/routing";
-
 import { getSiteSettings, getSiteSettingsMediaBindings } from "./app-config";
 import { isManagedMediaFilePath, resolveMediaUploadPath } from "./media-storage";
 
@@ -66,7 +64,7 @@ export function buildSiteIconUrls(input: SiteIconInput): SiteIconUrls {
 
 export async function getDynamicSiteIconUrls(): Promise<SiteIconUrls> {
   const [settings, bindings] = await Promise.all([getSiteSettings(), getSiteSettingsMediaBindings()]);
-  const defaultLocaleSettings = settings.locales[routing.defaultLocale];
+  const defaultLocaleSettings = settings.locales[settings.defaultLocale];
 
   return buildSiteIconUrls({
     siteName: defaultLocaleSettings.siteName,