feat(web): refactor module display logic and enhance UI components

- Introduced new utility functions for date formatting and module interval labeling.
- Replaced inline badge variant logic with a dedicated function for improved readability.
- Updated imports to streamline component usage and enhance maintainability.
- Enhanced the overall structure of the module display for better clarity and user experience.

web/src/lib/modules/display.ts

@@ -0,0 +1,43 @@
+import type { ModuleRow } from '$lib/api/types.js';
+
+/** Форматирование ISO-даты для таблиц модулей и расписания. */
+export function formatDateTime(value: string | null | undefined): string {
+	if (typeof value !== 'string' || value.trim().length === 0) return '—';
+	const parsed = new Date(value);
+	if (Number.isNaN(parsed.getTime())) return '—';
+	return parsed.toLocaleString('ru-RU');
+}
+
+/** Подпись интервала refresh: секунды, cron или комбинация. */
+export function moduleIntervalLabel(moduleRow: ModuleRow): string {
+	const cron = typeof moduleRow.cron_expr === 'string' ? moduleRow.cron_expr.trim() : '';
+	const raw = moduleRow.refresh_interval_sec as unknown;
+	const interval =
+		typeof raw === 'number'
+			? raw
+			: typeof raw === 'string' && raw.trim().length > 0
+				? Number(raw)
+				: null;
+	const intervalLabel = interval !== null && Number.isFinite(interval) ? `${interval}с` : '';
+	if (cron && intervalLabel) return `${intervalLabel} (${cron})`;
+	if (cron) return cron;
+	if (intervalLabel) return intervalLabel;
+	return '—';
+}
+
+export function moduleTypeBadgeVariant(
+	type: string
+): 'default' | 'secondary' | 'outline' | 'destructive' {
+	switch (type) {
+		case 'AS_PREFIXES':
+			return 'default';
+		case 'CDN_CIDRS':
+			return 'secondary';
+		case 'DOMAINS':
+			return 'outline';
+		case 'IP_RANGES':
+			return 'outline';
+		default:
+			return 'outline';
+	}
+}