feat: redesign portfolio position cards

src/entities/portfolio/model/display.ts

@@ -17,6 +17,21 @@ export function formatMoney(money: Money | null): string {
 	return `${formatDecimal(money.value)} ${money.currency === "RUB" ? "₽" : money.currency}`;
 }
 
+export function formatShare(
+	numerator: Money | null,
+	denominator: Money | null,
+): string | null {
+	if (!numerator || !denominator) return null;
+	const total = Number(denominator.value);
+	if (!Number.isFinite(total) || total <= 0) return null;
+	const percent = (Number(numerator.value) / total) * 100;
+	if (!Number.isFinite(percent)) return null;
+	const rounded = new Intl.NumberFormat("ru-RU", {
+		maximumFractionDigits: 1,
+	}).format(percent);
+	return `${rounded} %`;
+}
+
 export function formatSnapshotTime(value: string): string {
 	return new Intl.DateTimeFormat("ru-RU", {
 		dateStyle: "medium",