test(acl): list published zaaktypen for the beheer catalogus viewer (refs #130)

services/acl/Acl.Application/AclService.cs

@@ -42,6 +42,12 @@ public sealed class AclService(IZaakGateway gateway, AclDefaults defaults, IZaak
         await gateway.SetZaakToCancellationStatusAsync(zaakUrl, await catalog.GetZaaktypeUrlAsync(ct), clock.Today, ct);
     }
 
+    /// <summary>The published zaaktypen, for the beheer catalogus viewer (S-15a). Read-only passthrough:
+    /// no default-fill, the ACL is simply the only code allowed to read ZGW (§8.1).</summary>
+    public Task<IReadOnlyList<ZaaktypeSummary>> ListZaaktypenAsync(CancellationToken ct = default) =>
+        // ponytail: stub for the red test; real passthrough lands in the green commit.
+        Task.FromResult<IReadOnlyList<ZaaktypeSummary>>([]);
+
     /// <summary>The zaak's reference (its ZGW identificatie), for the read projection (#78).</summary>
     public Task<string> GetZaakReferenceAsync(Uri zaakUrl, CancellationToken ct = default)
     {

services/acl/Acl.Application/IZaakGateway.cs

@@ -40,4 +40,8 @@ public interface IZaakGateway
     /// <summary>Resolve the URL of the published informatieobjecttype with the given
     /// <paramref name="omschrijving"/> from the Catalogi API (S-27). Throws if none matches.</summary>
     Task<Uri> ResolveInformatieobjecttypeUrlAsync(string omschrijving, CancellationToken ct = default);
+
+    /// <summary>List the published zaaktypen from the Catalogi API — the read-only catalogus the beheer
+    /// portal shows (S-15a). The ACL is the only code allowed to read ZGW (§8.1).</summary>
+    Task<IReadOnlyList<ZaaktypeSummary>> ListZaaktypenAsync(CancellationToken ct = default);
 }

services/acl/Acl.Application/ZaaktypeSummary.cs

@@ -0,0 +1,6 @@
+namespace Acl.Application;
+
+/// <summary>A published zaaktype as the beheer catalogus viewer shows it (S-15a). Public-safe: the
+/// business <see cref="Identificatie"/> + human <see cref="Omschrijving"/> and the ZGW <see cref="Url"/>
+/// (the URL is the ACL's own reference, not shown to end users).</summary>
+public sealed record ZaaktypeSummary(string Identificatie, string Omschrijving, Uri Url);