feat: route bounded hierarchy postbox copies

webui/src/api/postbox.ts

@@ -110,6 +110,54 @@ export type PostboxOrganizationUnit = {
   functions: PostboxOrganizationFunction[];
 };
 
+export type PostboxOrganizationRelationType = {
+  id: string;
+  slug: string;
+  name: string;
+  structure_id?: string | null;
+  is_hierarchical: boolean;
+  status: string;
+};
+
+export type PostboxOrganizationStructure = {
+  id: string;
+  slug: string;
+  name: string;
+  structure_kind: string;
+  status: string;
+  relation_types: PostboxOrganizationRelationType[];
+};
+
+export type PostboxOrganizationTargets = {
+  units: PostboxOrganizationUnit[];
+  structures: PostboxOrganizationStructure[];
+};
+
+export type PostboxRoutingPolicy = {
+  linked_copy: {
+    enabled: boolean;
+    structure_id?: string | null;
+    relation_type_ids: string[];
+    max_depth: number;
+    stop_unit_id?: string | null;
+    stop_unit_type_id?: string | null;
+    target_function_type_id?: string | null;
+    target_template_id?: string | null;
+    fanout: "nearest" | "all";
+    allowed_classifications: string[];
+    allowed_producer_modules: string[];
+    require_expiry: boolean;
+    max_retention_days?: number | null;
+  };
+  attention: {
+    mode: "none" | "vacancy_escalation";
+    delay_minutes?: number | null;
+  };
+  shared_visibility: {
+    mode: "none";
+  };
+};
+
 export type PostboxTemplateRevision = {
   id: string;
   revision: number;
@@ -122,7 +170,7 @@ export type PostboxTemplateRevision = {
   allow_vacant_delivery: boolean;
   encryption_profile: string;
   history_policy: Record<string, unknown>;
-  routing_policy: Record<string, unknown>;
+  routing_policy: PostboxRoutingPolicy;
   retention_policy: Record<string, unknown>;
   published_at?: string | null;
   created_at: string;
@@ -151,6 +199,7 @@ export type PostboxTemplateRevisionPayload = Pick<
   | "address_pattern"
   | "classification"
   | "allow_vacant_delivery"
+  | "routing_policy"
 >;
 
 export type PostboxTemplateCreatePayload = PostboxTemplateRevisionPayload & {
@@ -269,12 +318,11 @@ export async function listAdminPostboxes(settings: ApiSettings): Promise<Postbox
 
 export async function listPostboxOrganizationTargets(
   settings: ApiSettings
-): Promise<PostboxOrganizationUnit[]> {
-  const response = await apiFetch<{ units: PostboxOrganizationUnit[] }>(
+): Promise<PostboxOrganizationTargets> {
+  return apiFetch<PostboxOrganizationTargets>(
     settings,
     "/api/v1/postbox/admin/organization-targets"
   );
-  return response.units;
 }
 
 export function createExactPostbox(