feat: translate auth and layout components to English

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/components/layout/header.tsx

@@ -26,10 +26,10 @@ export function Header() {
 
       <div className="flex items-center gap-4">
         <div className="text-right">
-          <p className="text-sm font-medium text-primary-800">{session?.user?.name || 'Usuario'}</p>
+          <p className="text-sm font-medium text-primary-800">{session?.user?.name || 'User'}</p>
           <p className="text-xs text-primary-500">{displayRole}</p>
         </div>
-        <Button variant="ghost" size="icon" onClick={handleLogout} title="Cerrar sesión">
+        <Button variant="ghost" size="icon" onClick={handleLogout} title="Log out">
           <LogOut className="h-5 w-5" />
         </Button>
       </div>