Export/import simple update messages

ts/components/conversation/JoinedSignalNotification.tsx

@@ -0,0 +1,37 @@
+// Copyright 2024 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+
+import type { LocalizerType } from '../../types/Util';
+import { I18n } from '../I18n';
+
+import { SystemMessage } from './SystemMessage';
+import { MessageTimestamp } from './MessageTimestamp';
+
+export type PropsData = {
+  timestamp: number;
+};
+
+export type PropsHousekeeping = {
+  i18n: LocalizerType;
+};
+
+export type Props = PropsData & PropsHousekeeping;
+
+export function JoinedSignalNotification(props: Props): JSX.Element {
+  const { i18n, timestamp } = props;
+
+  return (
+    <SystemMessage
+      contents={
+        <>
+          <I18n id="icu:JoinedSignal--notification" i18n={i18n} />
+          &nbsp;·&nbsp;
+          <MessageTimestamp i18n={i18n} timestamp={timestamp} />
+        </>
+      }
+      icon="info"
+    />
+  );
+}