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/stocks/ui/StocksPage/StocksPage.test.tsx

@@ -6,6 +6,7 @@ import { MemoryRouter } from "react-router";
 import { describe, expect, it, vi } from "vitest";
 import { configureAuthClient } from "@/shared/api";
 import { createTestQueryClient } from "@/test/query";
+import { resource } from "@/test/resource";
 import { server } from "@/test/server";
 import { StocksPage } from "./StocksPage";
 
@@ -15,22 +16,24 @@ describe("stock search", () => {
 		server.use(
 			http.get("*/api/v1/stocks", ({ request }) => {
 				query(new URL(request.url).searchParams.get("query"));
-				return HttpResponse.json([
-					{
-						name: "Сбербанк",
-						ticker: "SBER",
-						instrumentUid: "unique-stock",
-						slug: "SBER",
-						logoName: "sber.png",
-						classCode: "TQBR",
-						isin: "RU0009029540",
-						realExchange: "REAL_EXCHANGE_MOEX",
-						shareType: "SHARE_TYPE_COMMON",
-						apiTradeAvailable: true,
-						price: { currency: "RUB", value: "306.12" },
-						priceAt: "2026-09-10T10:00:00Z",
-					},
-				]);
+				return HttpResponse.json(
+					resource([
+						{
+							name: "Сбербанк",
+							ticker: "SBER",
+							instrumentUid: "unique-stock",
+							slug: "SBER",
+							logoName: "sber.png",
+							classCode: "TQBR",
+							isin: "RU0009029540",
+							realExchange: "REAL_EXCHANGE_MOEX",
+							shareType: "SHARE_TYPE_COMMON",
+							apiTradeAvailable: true,
+							price: { currency: "RUB", value: "306.12" },
+							priceAt: "2026-09-10T10:00:00Z",
+						},
+					]),
+				);
 			}),
 		);
 		configureAuthClient({