* replace country pages with region dashboards
- move /countries to /regions, with 301 redirects from the old URLs in
every locale
- add a region dashboard: a map of the region's countries with pins
coloured by prayer coverage, headline figures, and prayer, adoption and
engagement progress against the DOXA goals, plus a per-country table
- roll up progress stats per country and region in the shared summary
and serve them from /api/regions
- frame region maps with antimeridian-aware bounds
- add Regions to the hamburger menu and translate the new strings in all
eight locales
* put each region on the regions index in a card with a header band
The region name links to its dashboard with the site's chevron icon, and
the people-group and country counts sit centred beside it on a brand-green
header; the country list is the padded white card body.
