* fix: use country-level resolution for low-precision geohashes (#887)
* fix: skip admin fallback when country exists but is duplicate
Prevents mixed labels like "United Kingdom and Scotland" for
single-country geohashes. Admin fallback now only triggers when
no country is available from the placemark.
* fix: migrate stale low-precision bookmark names so country-first logic applies
Users who bookmarked a <=2-char geohash before the country-first resolver
kept the old administrativeArea cache (e.g. "England" for `gc`) because
resolveBookmarkNameIfNeeded bails when bookmarkNames[gh] is non-nil. Add a
one-shot, versioned migration that drops cached names for <=2-char geohashes
on load; the next LocationChannelsSheet .onAppear re-resolves them via the
fixed logic. Higher-precision entries are untouched.
* Fix low-precision geohash country names
---------
Co-authored-by: jack <212554440+jackjackbits@users.noreply.github.com>
Co-authored-by: jack <jackjackbits@users.noreply.github.com>
