Add ability to filter followed accounts' posts by language (#19095)

app/javascript/mastodon/features/account_timeline/components/header.js

@@ -22,6 +22,7 @@ export default class Header extends ImmutablePureComponent {
     onUnblockDomain: PropTypes.func.isRequired,
     onEndorseToggle: PropTypes.func.isRequired,
     onAddToList: PropTypes.func.isRequired,
+    onChangeLanguages: PropTypes.func.isRequired,
     hideTabs: PropTypes.bool,
     domain: PropTypes.string.isRequired,
     hidden: PropTypes.bool,
@@ -91,6 +92,10 @@ export default class Header extends ImmutablePureComponent {
     this.props.onEditAccountNote(this.props.account);
   }
 
+  handleChangeLanguages = () => {
+    this.props.onChangeLanguages(this.props.account);
+  }
+
   render () {
     const { account, hidden, hideTabs } = this.props;
 
@@ -117,6 +122,7 @@ export default class Header extends ImmutablePureComponent {
           onEndorseToggle={this.handleEndorseToggle}
           onAddToList={this.handleAddToList}
           onEditAccountNote={this.handleEditAccountNote}
+          onChangeLanguages={this.handleChangeLanguages}
           domain={this.props.domain}
           hidden={hidden}
         />