fix: properly forward return urls where missing

src/Twig/AppExtension.php

@@ -32,6 +32,7 @@ class AppExtension extends AbstractExtension
             new TwigFunction('icon', [AppRuntime::class, 'renderIcon'], ['needs_environment' => true, 'is_safe' => ['html']]),
             new TwigFunction('is_current_route', [AppRuntime::class, 'isCurrentRoute']),
             new TwigFunction('return_url', [AppRuntime::class, 'getEncodedReturnUrl']),
+            new TwigFunction('forwarded_return_url', [AppRuntime::class, 'getForwardedReturnUrl']),
             new TwigFunction('qa_attribute', [AppRuntime::class, 'renderQaAttribute'], ['is_safe' => ['html']]),
             new TwigFunction('has_pickup', [AppRuntime::class, 'hasPickup']),
         ];