refactor: enforce frontend view model boundaries

src/entities/portfolio/model/display.ts

@@ -8,14 +8,22 @@ function formatShare(
 	numerator: Money | null,
 	denominator: Money | null,
 ): null | string {
-	if (!numerator || !denominator) return /* eslint-disable-line unicorn/no-null -- The existing formatter contract uses null for unavailable data. */ null;
+	if (!numerator || !denominator)
+		// eslint-disable-next-line unicorn/no-null -- The existing formatter contract uses null for unavailable data.
+		return null;
 	const total = Number(denominator.value);
-	if (!Number.isFinite(total) || total <= 0) return /* eslint-disable-line unicorn/no-null -- The existing formatter contract uses null for unavailable data. */ null;
+	if (!Number.isFinite(total) || total <= 0)
+		// eslint-disable-next-line unicorn/no-null -- The existing formatter contract uses null for unavailable data.
+		return null;
 	const percent = (Number(numerator.value) / total) * PERCENT_SCALE;
-	if (!Number.isFinite(percent)) return /* eslint-disable-line unicorn/no-null -- The existing formatter contract uses null for unavailable data. */ null;
+	if (!Number.isFinite(percent))
+		// eslint-disable-next-line unicorn/no-null -- The existing formatter contract uses null for unavailable data.
+		return null;
+
 	const rounded = new Intl.NumberFormat("ru-RU", {
 		maximumFractionDigits: 1,
 	}).format(percent);
+
 	return `${rounded} %`;
 }