Store place names in English

[engleek]

Fixes #208.

The location picker (PlacesSearch → MapboxAutocomplete) queried Mapbox geocoding without a language, so Mapbox answered with each place's local name. Locations were saved as "Warszawa", "Genève" or "京都市", next to English ones.

Change

• geocodingUrl(query, { token, types }) (app/utils/geocoding.js) builds every Mapbox geocoding request with language=en, and encodes the query. It handles reverse lookups too. The picker uses it, so new locations are stored in English.
• scripts/backfill-place-names.mjs re-geocodes existing locations from their coordinates, in English. Usage is documented in its header:
  • it's a dry run by default, printing before → after; --write applies, and --limit N does a trial run;
  • it reads MAPBOX_TOKEN from the environment and never hard-codes it;
  • it paces itself (~5 requests/s), skips and logs failed or empty lookups, and keeps a name when English has none;
  • when renaming would make a row identical to another on the unique key, it re-points that row's orgs and events to the existing one and deletes it, in a transaction.
• A latent crash: PlacesSearch referenced an undefined address whenever a result's context held an address (ReferenceError). It reads the context entry instead.
• PhotonAutocomplete was unused (the issue first blamed it), so it's removed.

Running the backfill

MAPBOX_TOKEN=<the pk.… token> DATABASE_URL=<production> node scripts/backfill-place-names.mjs
MAPBOX_TOKEN=<the pk.… token> DATABASE_URL=<production> node scripts/backfill-place-names.mjs --write

Review the dry run's output before writing. I ran a 3-row dry run locally, and it worked. The seed's coordinates are random, so its renames on seed data mean nothing; on real data, names and coordinates match.

Tests

• Unit: geocodingUrl (forward and reverse: language, types, encoding) and placeNames (reads the city and region from the features).
• e2e: on /events/create, typing in Location sends a Mapbox request with language=en. The request is mocked, so CI never calls Mapbox. On main: it fails (language is missing).
• Locally: the full e2e suite (38) and the unit and story tests (55) pass.

🤖 Generated with Claude Code

[engleek]

Superseded by #249, which merged this change into main.