feat(ticket): redesign audit timeline with structured history events

src/utils/person.ts

@@ -0,0 +1,8 @@
+import type { TicketActor } from '@/types';
+
+export function getPersonLabel(
+  person: TicketActor | null | undefined,
+  fallback = 'Unknown',
+) {
+  return person?.name || person?.email || fallback;
+}