feat(support): filter waiting tickets and staff assignments

src/lib/admin/ticket-reply-age.ts

@@ -0,0 +1,10 @@
+export function ticketReplyAge(
+	value: Date | string | null,
+	now = Date.now(),
+): number | null {
+	if (!value) return null;
+	const time = value instanceof Date ? value.getTime() : Date.parse(value);
+	return Number.isFinite(time)
+		? Math.max(0, Math.floor((now - time) / 60000))
+		: null;
+}