Poll history - read only list of polls in current timeline (#10055)

* add settings while under development

* very basic tests for roomsummarycard

* empty poll history dialog and option in room summary

* pollS history in settings

* render an ugly list of polls in current timeline

* readonly poll history list items

* fix scroll window

* use short year code in date format, tidy

* no results message + tests

* strict fix

* mock intldatetimeformat for stable date formatting

* extract date format fn into date-utils

* jsdoc

src/components/views/dialogs/polls/PollListItem.tsx

@@ -0,0 +1,43 @@
+/*
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from "react";
+import { PollStartEvent } from "matrix-js-sdk/src/extensible_events_v1/PollStartEvent";
+import { MatrixEvent } from "matrix-js-sdk/src/matrix";
+
+import { Icon as PollIcon } from "../../../../../res/img/element-icons/room/composer/poll.svg";
+import { formatLocalDateShort } from "../../../../DateUtils";
+
+interface Props {
+    event: MatrixEvent;
+}
+
+const PollListItem: React.FC<Props> = ({ event }) => {
+    const pollEvent = event.unstableExtensibleEvent as unknown as PollStartEvent;
+    if (!pollEvent) {
+        return null;
+    }
+    const formattedDate = formatLocalDateShort(event.getTs());
+    return (
+        <li data-testid={`pollListItem-${event.getId()!}`} className="mx_PollListItem">
+            <span>{formattedDate}</span>
+            <PollIcon className="mx_PollListItem_icon" />
+            <span className="mx_PollListItem_question">{pollEvent.question.text}</span>
+        </li>
+    );
+};
+
+export default PollListItem;