feat(editor): include onSelect and onKeyDownRef for mention component (#1976)

Co-authored-by: Tofik Hasanov <annexcies@gmail.com>

Author: github-actions[bot]

packages/ui/src/components/editor/extensions/mention.tsx

@@ -258,9 +258,12 @@ export function createMentionExtension({ suggestion }: CreateMentionExtensionOpt
             // Ensure items is always an array
             const items = Array.isArray(props.items) ? props.items : [];
 
+            // Include onSelect and onKeyDownRef to preserve keyboard navigation
             component.updateProps({
               ...props,
               items,
+              onSelect: suggestion.onSelect,
+              onKeyDownRef: keyDownHandlerRef,
             });
 
             if (!props.clientRect) {