Improve "Adding an AI Provider" flow
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3478400. -->
Reported by: [nx2611](https://www.drupal.org/user/3737049)
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>When adding a new AI provider key through /admin/config/system/keys/add, the next step is unclear. I do not know that I still need to navigate back to /admin/config/ai/providers/openai to select the newly added key. This causes confusion and interrupts the user flow.</p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>1. Navigate to /admin/config/system/keys/add.<br>
2. Add a new AI provider key.<br>
3. Observe the lack of instruction or guidance for the next step.<br>
4. Manually navigate to /admin/config/ai/providers/openai to select the key.</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>1. Clear next steps or guidance that the user needs to go back and select the key like a message and link to the next page.<br>
2. Or add a breadcrumb linking to /admin/config/ai/providers/openai.</p>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<h3 id="summary-ui-changes">User interface changes</h3>
<p>Add message and link.</p>
<h3 id="summary-api-changes">API changes</h3>
<h3 id="summary-data-model-changes">Data model changes</h3>
issue