AI panel is empty when it fails to initialize
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3551610. -->
Reported by: [lauriii](https://www.drupal.org/user/1078742)
Related to !229
>>>
<h3 id="overview">Overview</h3>
<p>The AI panel renders completely empty when it fails to initialize. I ran into this because I had an older version of <code>ai_agents</code> than what's supported.</p>
<h3 id="proposed-resolution">Proposed resolution</h3>
<p>Display an error message instead of just rendering an empty space.</p>
<h3 id="ui-changes">User interface changes</h3>
issue