test: pin date in account events date filter test (WealthLedger/frontend#98)

The test clicked today + 10 days, which falls outside the Mantine calendar grid for some real dates and made the suite fail depending on the run date.

src/pages/account-events/ui/AccountEventsPage/AccountEventsPage.filters.test.tsx

@@ -17,7 +17,7 @@ import {
 	useLocation,
 	useNavigate,
 } from "react-router";
-import { beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 import { configureAuthClient } from "@/shared/api";
 import { defaultPeriod, formatDate, moscowDate } from "@/shared/lib";
@@ -73,6 +73,10 @@ function renderEvents(accountId: string, searches: string[]) {
 
 describe("Upcoming event date filters", () => {
 	beforeEach(() => {
+		// Pin "today": the test picks today + 10 days, which must be inside the visible calendar grid.
+		// Real dates can push it beyond the grid (e.g. 2026-10-23 -> 2 November).
+		vi.useFakeTimers({ toFake: ["Date"] });
+		vi.setSystemTime(new Date("2026-08-10T09:00:00Z"));
 		configureAuthClient({
 			accessToken: () => "token",
 			clear: vi.fn(),
@@ -80,6 +84,8 @@ describe("Upcoming event date filters", () => {
 		});
 	});
 
+	afterEach(() => vi.useRealTimers());
+
 	it("keeps reads and sync disabled without an account scope", async () => {
 		const requests: string[] = [];
 		server.use(