refactor!: support RUB only (WealthLedger/main#55)

Adopt RUB-only API contract; remove currency cards, selectors,
screener currency filter and multi-currency branches.

BREAKING CHANGE: requires the RUB-only backend contract.

src/pages/accounts/ui/AccountsPage/components/AccountsPageLoaded.view.tsx

@@ -25,34 +25,16 @@ type AccountsPageLoadedProps = {
 	readRetry?: ReadRetryProps;
 };
 
-type Money = { currency: string; value: string };
-
-function accountTotals(accounts: BrokerageAccountCard[]) {
-	const values = new Map<string, string[]>();
-	let excludedCount = 0;
+function accountTotals(accounts: BrokerageAccountCard[]): null | string {
+	const values: string[] = [];
 
 	for (const { summary } of accounts) {
-		if (summary.state === "empty") continue;
+		if (summary.state !== "available") continue;
 
-		if (summary.state === "unavailable") {
-			excludedCount += 1;
-			continue;
-		}
-
-		for (const total of summary.portfolio.totalsByCurrency) {
-			values.set(total.currency, [
-				...values.get(total.currency) ?? [],
-				total.value,
-			]);
-		}
+		values.push(summary.portfolio.totals.value);
 	}
 
-	const totals: Money[] = Array.from(values, ([currency, amounts]) => ({
-		currency,
-		value: sumDecimals(amounts),
-	}));
-
-	return { excludedCount, totals };
+	return values.length > 0 ? sumDecimals(values) : null;
 }
 
 function sumDecimals(values: string[]) {
@@ -88,9 +70,11 @@ function sumDecimals(values: string[]) {
 
 const AccountsPageLoaded: FC<AccountsPageLoadedProps> = (props) => {
 	const { t } = useTranslation();
-	const { excludedCount, totals } = accountTotals(props.accounts);
-	const primaryTotal = totals.find(total => total.currency === "RUB") ?? totals[0];
-	const otherTotals = totals.filter(total => total !== primaryTotal);
+	const total = accountTotals(props.accounts);
+
+	const excludedCount = props.accounts.filter(
+		account => account.summary.state === "unavailable",
+	).length;
 
 	return (
 		<Stack gap="lg">
@@ -101,25 +85,15 @@ const AccountsPageLoaded: FC<AccountsPageLoadedProps> = (props) => {
 					{t("accounts.currentValue")}
 				</Text>
 
-				{primaryTotal
+				{total === null
 					? (
-							<Text className={classes.primaryTotal} fw={700}>
-								{formatMoney(primaryTotal, { withRoundedCents: true })}
-							</Text>
+							<Text c="dimmed">{t("accounts.summaryNoTotals")}</Text>
 						)
 					: (
-							<Text c="dimmed">{t("accounts.summaryNoTotals")}</Text>
-						)}
-
-				{otherTotals.length > 0 && (
-					<Group gap="md" wrap="wrap">
-						{otherTotals.map(total => (
-							<Text className={classes.otherTotal} key={total.currency}>
-								{formatMoney(total, { withRoundedCents: true })}
+							<Text className={classes.primaryTotal} fw={700}>
+								{formatMoney({ currency: "RUB", value: total }, { withRoundedCents: true })}
 							</Text>
-						))}
-					</Group>
-				)}
+						)}
 
 				<Group className={classes.meta} gap="xs" wrap="wrap">
 					<Text c="dimmed" size="xs">