Watch article history over SSE so the tab stays current while open.

src/components/article/tabs/ArticleHistoryTab.jsx

@@ -17,13 +17,20 @@ export default class ArticleHistoryTab extends Component {
   constructor(props) {
     super(props);
     this.state = { history: null };
+    this.unwatchHistory = null;
   }
 
   componentDidMount() {
-    void this.context.article
-      .history(this.props.sku)
-      .then((res) => this.setState({ history: res.history }))
-      .catch(notifyError);
+    this.unwatchHistory = this.context.article.historyWatch(
+      this.props.sku,
+      (history) => this.setState({ history }),
+      notifyError,
+    );
+  }
+
+  componentWillUnmount() {
+    this.unwatchHistory?.();
+    this.unwatchHistory = null;
   }
 
   render() {