update arabic to be default

apps/homepage/tests/unit/localization.test.ts

@@ -16,7 +16,7 @@ describe('localization foundations', () => {
   it('selects a supported locale by quality', () => {
     expect(localeFromAcceptLanguage('de-DE;q=0.9, ar;q=0.8, fr;q=0.7')).toBe('ar');
     expect(localeFromAcceptLanguage('fr-CA, en;q=0.8')).toBe('fr');
-    expect(localeFromAcceptLanguage(null)).toBe('en');
+    expect(localeFromAcceptLanguage(null)).toBe('ar');
   });
 
   it('validates locale direction and route lookup', () => {
@@ -45,7 +45,7 @@ describe('localization foundations', () => {
     const links = hreflangMap(new URL('https://approved.test'), 'home');
     expect(links.en).toBe('https://approved.test/en/dark');
     expect(links.ar).toBe('https://approved.test/ar/dark');
-    expect(links['x-default']).toBe('https://approved.test/en/dark');
+    expect(links['x-default']).toBe('https://approved.test/ar/dark');
   });
 
   it('preserves only approved campaign query values and valid hashes', () => {