[WIP] Add exit button to return to index page

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

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This section details on the original issue you should resolve

<issue_title>Exit button to return to index page</issue_title>
<issue_description>While inside a pad, there is no way to exit, except from manually editing the url.

An "Exit" button would be quite useful, to return to the index page. Plus maybe a button to return to the list page (even more useful)</issue_description>

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