feat: homepage animations; Arabic as default locale

apps/web/app/lib/seo.ts

@@ -14,6 +14,7 @@
 import type { MetaDescriptor } from "react-router";
 
 import {
+  DEFAULT_LOCALE,
   INTL_LOCALE,
   OG_LOCALE,
   SUPPORTED_LOCALES,
@@ -103,8 +104,8 @@ export interface LocaleAlternate {
 
 /**
  * The hreflang set for a page: one entry per locale plus `x-default`, which
- * points at the English URL because English is the default locale that bare
- * "/" negotiates towards.
+ * points at the default-locale URL because that is what a bare "/" resolves
+ * to when no locale can be negotiated.
  */
 export function alternateUrls(
   siteUrl: string,
@@ -121,9 +122,9 @@ export function alternateUrls(
   return [
     ...alternates,
     {
-      locale: "en",
+      locale: DEFAULT_LOCALE,
       hrefLang: "x-default",
-      href: canonicalUrl(siteUrl, localizedPath(unprefixed, "en")),
+      href: canonicalUrl(siteUrl, localizedPath(unprefixed, DEFAULT_LOCALE)),
     },
   ];
 }