Improve messaging and dashboard reliability

apps/dashboard/src/features/conversations/relative-time.ts

@@ -0,0 +1,20 @@
+const MINUTE_MS = 60_000;
+const HOUR_MS = 60 * MINUTE_MS;
+const DAY_MS = 24 * HOUR_MS;
+const MONTH_MS = 30 * DAY_MS;
+const YEAR_MS = 365 * DAY_MS;
+
+export function formatShortRelativeTime(timestamp: number, now: number): string {
+  const elapsed = Math.max(0, now - timestamp);
+
+  if (elapsed < MINUTE_MS) return 'just now';
+  if (elapsed < HOUR_MS) return `${Math.floor(elapsed / MINUTE_MS)}m ago`;
+  if (elapsed < DAY_MS) return `${Math.floor(elapsed / HOUR_MS)}h ago`;
+  if (elapsed < MONTH_MS) return `${Math.floor(elapsed / DAY_MS)}d ago`;
+  if (elapsed < YEAR_MS) return `${Math.floor(elapsed / MONTH_MS)}mo ago`;
+  return `${Math.floor(elapsed / YEAR_MS)}y ago`;
+}
+
+export function formatExactTime(timestamp: number): string {
+  return new Intl.DateTimeFormat(undefined, { dateStyle: 'medium', timeStyle: 'short' }).format(timestamp);
+}