feat: show persisted investment data and sync state

Consume the provided resource-envelope API snapshot. Preserve financial snapshots during
refresh, observe synchronization without importing, and fence late responses across
account and connection changes.

src/features/tbank-connection/index.ts

@@ -1 +1,7 @@
+export { useScreenSync } from "./model/screen-sync";
+export {
+	type InvestmentScreen,
+	useTbankSync,
+	useTbankSyncStatus,
+} from "./model/sync";
 export { TbankConnectionSection } from "./ui/TbankConnectionSection/TbankConnectionSection";