feat: group all-account rows by instrument and day (WealthLedger/main#47) (#126)

src/shared/lib/display.test.ts

@@ -3,6 +3,7 @@ import { describe, expect, it } from "vitest";
 import {
 	formatDate,
 	formatMoney,
+	formatSnapshotDay,
 	formatSnapshotTime,
 	instrumentLogoUrl,
 } from "./display";
@@ -22,6 +23,10 @@ describe("shared display helpers", () => {
 		}).format(new Date(instant));
 
 		expect(formatSnapshotTime(instant)).toBe(expected);
+		expect(formatSnapshotDay(instant)).toBe(
+			new Intl.DateTimeFormat("ru-RU", { dateStyle: "short" })
+				.format(new Date(instant)),
+		);
 	});
 	it("formats decimal strings without financial arithmetic", () => {
 		expect(formatMoney({ currency: "RUB", value: "-1234567.89" })).toBe(