refactor(catalog): unify commands and embed guarded catalog workspace

src/features/catalog/client/latest-request.ts

@@ -0,0 +1,19 @@
+/** Cancels replaced requests and rejects late completions, even if transport ignores abort. */
+export function createLatestRequest() {
+	let current: AbortController | null = null;
+	return {
+		start() {
+			current?.abort();
+			const controller = new AbortController();
+			current = controller;
+			return {
+				signal: controller.signal,
+				isCurrent: () => current === controller && !controller.signal.aborted,
+			};
+		},
+		cancel() {
+			current?.abort();
+			current = null;
+		},
+	};
+}