refactor(gateway): split server runtime

src/gateway/server-model-catalog.ts

@@ -0,0 +1,19 @@
+import {
+  loadModelCatalog,
+  type ModelCatalogEntry,
+  resetModelCatalogCacheForTest,
+} from "../agents/model-catalog.js";
+import { loadConfig } from "../config/config.js";
+
+export type GatewayModelChoice = ModelCatalogEntry;
+
+// Test-only escape hatch: model catalog is cached at module scope for the
+// process lifetime, which is fine for the real gateway daemon, but makes
+// isolated unit tests harder. Keep this intentionally obscure.
+export function __resetModelCatalogCacheForTest() {
+  resetModelCatalogCacheForTest();
+}
+
+export async function loadGatewayModelCatalog(): Promise<GatewayModelChoice[]> {
+  return await loadModelCatalog({ config: loadConfig() });
+}