feat(support): filter waiting tickets and staff assignments

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

@@ -0,0 +1,18 @@
+import { describe, expect, it } from "vitest";
+import { ticketReplyAge } from "./ticket-reply-age";
+
+describe("ticket reply age", () => {
+	it("measures elapsed minutes, including day boundaries", () => {
+		expect(
+			ticketReplyAge(
+				"2026-09-10T12:00:00Z",
+				Date.parse("2026-09-11T13:30:00Z"),
+			),
+		).toBe(1530);
+	});
+	it("does not report negative or invalid ages", () => {
+		expect(ticketReplyAge(new Date(2000), 1000)).toBe(0);
+		expect(ticketReplyAge("invalid")).toBeNull();
+		expect(ticketReplyAge(null)).toBeNull();
+	});
+});