refactor: tighten types and reuse instrument UI

src/shared/lib/calendar.ts

@@ -9,13 +9,15 @@ function isValidPeriod(from: null | string, to: null | string) {
 	);
 }
 
+const moscowFormatter = new Intl.DateTimeFormat("en-CA", {
+	day: "2-digit",
+	month: "2-digit",
+	timeZone: "Europe/Moscow",
+	year: "numeric",
+});
+
 function moscowDate(value: Date): string {
-	const parts = new Intl.DateTimeFormat("en-CA", {
-		day: "2-digit",
-		month: "2-digit",
-		timeZone: "Europe/Moscow",
-		year: "numeric",
-	}).formatToParts(value);
+	const parts = moscowFormatter.formatToParts(value);
 
 	const part = (type: string) =>
 		parts.find(item => item.type === type)?.value;