update structure

ts/forwarding/config/domain-config.ts

@@ -0,0 +1,31 @@
+import type { ForwardConfig } from './forwarding-types.js';
+
+/**
+ * Domain configuration with unified forwarding configuration
+ */
+export interface DomainConfig {
+  // Core properties - domain patterns
+  domains: string[];
+
+  // Unified forwarding configuration
+  forwarding: ForwardConfig;
+}
+
+/**
+ * Helper function to create a domain configuration
+ */
+export function createDomainConfig(
+  domains: string | string[],
+  forwarding: ForwardConfig
+): DomainConfig {
+  // Normalize domains to an array
+  const domainArray = Array.isArray(domains) ? domains : [domains];
+
+  return {
+    domains: domainArray,
+    forwarding
+  };
+}
+
+// Backwards compatibility
+export interface IDomainConfig extends DomainConfig {}