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/pages/account-operations/ui/AccountOperationsPage/AccountOperationsPage.vm.ts

@@ -9,6 +9,7 @@ import {
 	useBrokerageOperations,
 } from "@/entities/broker-operation";
 
+import { useScreenSync } from "@/features/tbank-connection";
 import { apiErrorCode } from "@/shared/api";
 
 type AccountOperationsPageViewModel =
@@ -16,6 +17,10 @@ type AccountOperationsPageViewModel =
 	| { state: "error"; retry: () => void }
 	| {
 			state: "loaded";
+			sourceError?: boolean;
+			lastSuccessfulAt?: string | null;
+			partial?: boolean;
+			historyLoading?: boolean;
 			refreshing?: boolean;
 			refreshError?: boolean;
 			retry?: () => void;
@@ -82,6 +87,10 @@ const useAccountOperationsPageVm = (
 		...firstPageQuery,
 		...(cursor ? { cursor } : {}),
 	});
+	const sync = useScreenSync(
+		{ screen: "operations", accountId, ...firstPageQuery },
+		[operations],
+	);
 	const resetQueryKey = brokerageOperationsQueryOptions(accountId, {
 		limit: 100,
 	}).queryKey;
@@ -95,12 +104,12 @@ const useAccountOperationsPageVm = (
 				exact: true,
 			});
 			resetCursors();
-		} else void operations.refetch();
+		} else void sync.refresh();
 	};
 
 	if (operations.isLoading) return { state: "loading" };
 	if (
-		operations.isError &&
+		(operations.isError || operations.meta?.sync.state === "failed") &&
 		(!operations.data ||
 			apiErrorCode(operations.error) === "INVALID_OPERATIONS_CURSOR")
 	)
@@ -115,8 +124,14 @@ const useAccountOperationsPageVm = (
 
 	return {
 		state: "loaded",
-		refreshing: operations.isFetching,
-		refreshError: operations.isError,
+		sourceError: sync.sourceError,
+		lastSuccessfulAt: operations.meta?.lastSuccessfulAt,
+		partial: operations.meta?.availability !== "complete",
+		historyLoading:
+			operations.meta?.coverage?.historyState === "loading" ||
+			operations.meta?.coverage?.historyState === "partial",
+		refreshing: operations.isFetching || sync.refreshing,
+		refreshError: operations.isError || sync.sourceError || sync.transportError,
 		retry,
 		draftFrom,
 		draftTo,