Two issues:
1. Re-selection stall when popstate lands on the same entry UID.
The restoration effect only had [entries, selectedEntryUid] as
deps, so setting selectedEntry=null without changing either dep
left the rail blank. Adding selectedEntry to the dep array lets
the null→restore cycle complete.
2. tag/entry params leaking onto non-archive URLs.
pushState on view changes carried window.location.search verbatim,
so /settings?tag=foo was possible; reloading it triggered the
tagFilter effect and force-switched back to archive.
Fix: parseLocation() only extracts tag/entry when view=archive,
and the params-sync effect only emits them on archive too.