twitter: embedded timeline broken unless logged in

[GraemeWatt]

The HEPData homepage shows a feed from the @HEPData X (Twitter) account:

hepdata/hepdata/modules/theme/templates/hepdata_theme/home.html

Lines 161 to 165 in b117511

	<p>
	<a class="twitter-timeline" data-width="800" data-height="200" data-dnt="true"
	href="https://twitter.com/HEPData?ref_src=twsrc%5Etfw">Tweets by HEPData</a>
	</p>
	<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

This shows "Nothing to see here - yet" unless the user is logged in to X (Twitter) from the same browser and their browser allows cross-site tracking (often not the default). This seems to be a known problem for almost a year with no definite resolution:

https://devcommunity.x.com/t/again-list-widget-says-nothing-to-see-here-yet-if-logged-out/198782

I tried a proposed third-party workaround (https://www.athabasca.dev/twitterwidget), but it did not work when testing locally. For now, I'll leave this issue open until a solution can be found. I'll add some explanatory text underneath the embedded Twitter widget:

Tweets are not displayed unless you are logged into <a href="https://X.com" target="_blank">X (Twitter)</a> and your browser settings allow cross-site tracking.

In the longer term, if no solution becomes available, we should consider removing the embedded Twitter widget from the HEPData homepage.