feat: add agent identity avatars (#1329) (thanks @dlauer)

test/helpers/envelope-timestamp.ts

@@ -0,0 +1,32 @@
+export function formatLocalEnvelopeTimestamp(date: Date): string {
+  const parts = new Intl.DateTimeFormat("en-US", {
+    year: "numeric",
+    month: "2-digit",
+    day: "2-digit",
+    hour: "2-digit",
+    minute: "2-digit",
+    hourCycle: "h23",
+    timeZoneName: "short",
+  }).formatToParts(date);
+
+  const pick = (type: string) => parts.find((part) => part.type === type)?.value;
+  const yyyy = pick("year");
+  const mm = pick("month");
+  const dd = pick("day");
+  const hh = pick("hour");
+  const min = pick("minute");
+  const tz = [...parts]
+    .reverse()
+    .find((part) => part.type === "timeZoneName")
+    ?.value?.trim();
+
+  if (!yyyy || !mm || !dd || !hh || !min) {
+    throw new Error("Missing date parts for envelope timestamp formatting.");
+  }
+
+  return `${yyyy}-${mm}-${dd} ${hh}:${min}${tz ? ` ${tz}` : ""}`;
+}
+
+export function escapeRegExp(value: string): string {
+  return value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+}