JavaScript error on admin pages without Meta Box dashboard elements

When I navigate to any WordPress admin page that's not the Meta Box dashboard (like my custom plugin pages), I get this JavaScript error in the browser console:

Uncaught TypeError: can't access property "addEventListener", document.querySelector(...) is null

Apply to dashboard.js

Where it happens:
The error occurs in dashboard.js around lines 243-244 where the code tries to add event listeners to .mb-dashboard__news-icon and .mb-dashboard__news__close elements.

Steps to reproduce:
1. Go to any admin page that's not the Meta Box dashboard (like Posts, Pages, or a custom plugin page)
2. Open browser developer tools (F12)
3. Check the Console tab - you'll see the error

The problem:
The dashboard JavaScript is being loaded on all admin pages, but it's trying to attach event listeners to elements that only exist on the Meta Box dashboard page itself. When those elements don't exist, document.querySelector() returns null, causing the error.

My temporary fix:
I added null checks before adding the event listeners:

const newsIcon = document.querySelector( '.mb-dashboard__news-icon' );
const newsClose = document.querySelector( '.mb-dashboard__news__close' );

if ( newsIcon ) {
    newsIcon.addEventListener( 'click', () => news.classList.toggle( 'mb-dashboard__news--active' ) );
}

if ( newsClose ) {
    newsClose.addEventListener( 'click', () => news.classList.remove( 'mb-dashboard__news--active' ) );
}

Apply to dashboard.js
WordPress 6.x
Meta Box (latest version)
Various admin pages

thanks

Nick