fix: exclude currency mirror from position shares (WealthLedger/frontend#59)

src/pages/account/model/positions.test.ts

@@ -23,7 +23,7 @@ function sections(positions: Portfolio["positions"]) {
 }
 
 describe("account position sections", () => {
-	it("excludes currency instruments only from display, preserving order and share denominators", () => {
+	it("excludes currency mirrors from display and share denominators", () => {
 		const otherTypes = [
 			"OPTION",
 			"OTHER",
@@ -73,12 +73,30 @@ describe("account position sections", () => {
 			"FIGI-FUND",
 			...otherTypes.map(type => `FIGI-${type}-NEXT`),
 		]);
-		expect(sections[0]?.groups[0]?.positions[0].shareText).toBe("40 %");
-		expect(sections[1]?.groups[0]?.positions[0].shareText).toBe("20 %");
-		expect(sections[2]?.groups[1]?.positions[0].shareText).toBe("20 %");
+		expect(sections[0]?.groups[0]?.positions[0].shareText).toBe("50 %");
+		expect(sections[1]?.groups[0]?.positions[0].shareText).toBe("25 %");
+		expect(sections[2]?.groups[1]?.positions[0].shareText).toBe("25 %");
 		expect(snapshot).toEqual(original);
 	});
 
+	it("keeps all-account positions from both accounts without counting mirrored cash", () => {
+		const result = sections([
+			makePosition({ account: { id: "a", name: "Основной" }, currentValue: { currency: "RUB", value: "100" } }),
+			makePosition({ account: { id: "a", name: "Основной" }, currentValue: { currency: "RUB", value: "50" }, type: "CURRENCY" }),
+			makePosition({ account: { id: "b", name: "ИИС" }, currentValue: { currency: "RUB", value: "100" } }),
+		]);
+
+		const visible = result.flatMap(section =>
+			section.groups.flatMap(group => group.positions));
+
+		expect(visible)
+			.toEqual(expect.arrayContaining([
+				expect.objectContaining({ account: { id: "a", name: "Основной" }, shareText: "50 %" }),
+				expect.objectContaining({ account: { id: "b", name: "ИИС" }, shareText: "50 %" }),
+			]));
+		expect(visible).toHaveLength(2);
+	});
+
 	it("prepares grouped position sections with derived display data", () => {
 		expect(
 			toAccountPagePositionSections(portfolio).map(({ groups, kind }) => ({

src/pages/account/model/positions.ts

@@ -152,7 +152,7 @@ function toAccountPagePositionSections(
 	const denominators = new Map<string, number>();
 
 	for (const position of portfolio.positions) {
-		if (!position.currentValue) continue;
+		if (position.type === "CURRENCY" || !position.currentValue) continue;
 		const currency = position.currentValue.currency;
 		denominators.set(
 			currency,