ContextMenu: fix ts errors (DevExpress#30455)

Author: anna-shakhova

packages/devextreme/js/__internal/core/widget/widget.ts

@@ -58,7 +58,7 @@ class Widget<
 
   _contentReadyAction?: ((event?: Record<string, unknown>) => void) | null;
 
-  private _keyboardListenerId?: string | null;
+  protected _keyboardListenerId?: string | null;
 
   private _isReady?: boolean;
 

packages/devextreme/js/__internal/ui/chat/messagelist.ts

@@ -15,6 +15,7 @@ import { isDate, isDefined } from '@js/core/utils/type';
 import type { DxEvent } from '@js/events';
 import type { Message, TextMessage, User } from '@js/ui/chat';
 import type { Item as ContextMenuItem } from '@js/ui/context_menu';
+import type dxContextMenu from '@js/ui/context_menu';
 import type { WidgetOptions } from '@js/ui/widget/ui.widget';
 import type { OptionChanged } from '@ts/core/widget/types';
 import Widget from '@ts/core/widget/widget';
@@ -331,6 +332,7 @@ class MessageList extends Widget<Properties> {
       hideOnParentScroll: false,
       overlayContainer: this._scrollView.container(),
       visualContainer: this._scrollView.container(),
+      // @ts-expect-error ts-error
       boundaryOffset: { h: 16 },
     });
 
@@ -345,7 +347,7 @@ class MessageList extends Widget<Properties> {
     $contextMenu.appendTo(this.$element());
   }
 
-  _onContextMenuShowing(e: Cancelable & EventInfo<ContextMenu>): void {
+  _onContextMenuShowing(e: Cancelable & EventInfo<dxContextMenu>): void {
     // @ts-expect-error ts-error
     const { jQEvent } = e;