refactor: clarify frontend module ownership

src/entities/brokerage-event/index.ts

@@ -2,6 +2,7 @@ export {
 	type BrokerageEvent,
 	useBrokerageEvents,
 } from "./api/useBrokerageEvents";
+export { brokerageEventKey } from "./model/event-key";
 export { BrokerageEventCard } from "./ui/BrokerageEventCard";
 export {
 	BrokerageEventsPreview,

src/entities/brokerage-event/model/event-key.ts

@@ -0,0 +1,10 @@
+import type { BrokerageEvent } from "../api/useBrokerageEvents";
+
+function brokerageEventKey(event: BrokerageEvent) {
+	return JSON.stringify([
+		event.account?.id, event.type, event.date, event.instrumentUid,
+		event.figi, event.ticker, event.logoName,
+	]);
+}
+
+export { brokerageEventKey };

src/entities/brokerage-event/ui/BrokerageEventsPreview/BrokerageEventsPreview.tsx

@@ -9,6 +9,7 @@ import { formatSnapshotTime } from "@/shared/lib";
 
 import type { BrokerageEvent } from "../../api/useBrokerageEvents";
 
+import { brokerageEventKey } from "../../model/event-key";
 import { BrokerageEventCard } from "../BrokerageEventCard";
 
 type BrokerageEventsPreviewProps = {
@@ -66,15 +67,7 @@ const BrokerageEventsPreview: FC<BrokerageEventsPreviewProps> = (props) => {
 				&& events.items.map(event => (
 					<BrokerageEventCard
 						event={event}
-						key={JSON.stringify([
-							event.account?.id,
-							event.type,
-							event.date,
-							event.instrumentUid,
-							event.figi,
-							event.ticker,
-							event.logoName,
-						])}
+						key={brokerageEventKey(event)}
 					/>
 				))}