Bug: Archive calendar does not correspond with search results / current list

Following a search of the current list, the Archive calendar shows the full range of the list rather than the matching dates; the range of matching results can only be gleaned from scrolling the results.

When a search is extended to multiple lists, the Archive calendar is set to the total range of all the matching lists, regardless of whether there are any matches. However, the list buttons only relate to the current list. So the Archive calendar can show many more entries than actually exist for the list.

The Archive calendar should either continue to show the correct dates for the list to which it applies, or it should become a way to navigate the search results, in which case the calendar should only show the range of results.

The current behaviour with multiple lists is very confusing.

No files, tests, or entry points are named. Reproduce a search on the current list, then repeat it across multiple lists while comparing the Archive calendar, matching dates, and list buttons. Done means the calendar behavior is consistent with the selected list or clearly navigates only the matching search results.

Written by the indexing model from the issue text.