Answers 'why don't the map and stats match' by making the gap visible, and
brings shops into the region breakdown.
- src/lib/geocodeRegions.ts is now the single reverse-geocode helper (spot
create, shop create, shop edit), so the Nominatim call + Accept-Language + the
parse rules can't drift. Never throws.
- Shops now publish city/country/country_code (previously none), so they can
appear in the region breakdown.
- Stats: regions cover spots AND shops; a new 'Uncategorised (N)' row plus a
'{N} of {M}' footnote let the card reconcile with the location total. Section
retitled 'Spots & Shops by Region'.
- PERSIST_BUSTER v3 -> v4.
- /privacy: wording now 'spot or shop geocoding'.
The map deliberately still reads the community relay + the reader's relays
(forcing canonical would hide an opted-out user's own spots) - documented.
