Refactor

Delay showing page content until JS has finished setting up page elements
That then allows the following:
Leave relative time to be rendered on the client
Leave collapsible lists to be rendered on the client
Which massively simplfies the backend templates which were error prone

internal/assets/templates/rss-horizontal-cards.html

@@ -17,7 +17,7 @@
             <div class="margin-bottom-widget padding-inline-widget flex flex-column grow">
                 <a href="{{ .Link }}" title="{{ .Title }}" class="text-truncate-3-lines color-primary-if-not-visited margin-top-10 margin-bottom-auto" target="_blank" rel="noreferrer">{{ .Title }}</a>
                 <ul class="list-horizontal-text flex-nowrap margin-top-7">
-                    <li class="shrink-0" title="{{ .PublishedAt | formatTime }}" {{ dynamicRelativeTimeAttrs .PublishedAt }}>{{ .PublishedAt | relativeTime }}</li>
+                    <li class="shrink-0" {{ dynamicRelativeTimeAttrs .PublishedAt }}></li>
                     <li class="shrink min-width-0 text-truncate">{{ .ChannelName }}</li>
                 </ul>
             </div>