chore: finish frontend ESLint migration #18
Enable every plugin recommended preset and replace Biome with ESLint formatting. Preserve API contracts and JSX whitespace; verify source, tests, builds and tooling.
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@@ -1,17 +1,18 @@
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import type { Portfolio } from "../api/usePortfolio";
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const PERCENT_SCALE = 100;
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type Money = Portfolio["totalsByCurrency"][number];
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function formatShare(
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numerator: Money | null,
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denominator: Money | null,
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): string | null {
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if (!numerator || !denominator) return null;
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): null | string {
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if (!numerator || !denominator) return /* eslint-disable-line unicorn/no-null -- The existing formatter contract uses null for unavailable data. */ null;
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const total = Number(denominator.value);
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if (!Number.isFinite(total) || total <= 0) return null;
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// biome-ignore lint/style/noMagicNumbers: obvious conversion of a ratio to percent.
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const percent = (Number(numerator.value) / total) * 100;
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if (!Number.isFinite(percent)) return null;
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if (!Number.isFinite(total) || total <= 0) return /* eslint-disable-line unicorn/no-null -- The existing formatter contract uses null for unavailable data. */ null;
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const percent = (Number(numerator.value) / total) * PERCENT_SCALE;
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if (!Number.isFinite(percent)) return /* eslint-disable-line unicorn/no-null -- The existing formatter contract uses null for unavailable data. */ null;
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const rounded = new Intl.NumberFormat("ru-RU", {
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maximumFractionDigits: 1,
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}).format(percent);
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