i18n: fix the LGTM review findings and tidy the branch texts

- i18n scanner: lastError sink, no false sinks on defaults and ternaries
- shared src/i18n/marker.js for modules that only mark strings
- wind field messages move to wind/fields.js; CITY_POIS imports from cityPois.js
- drop review IDs, change history and stale references from comments and docs

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/sources/httpBody.js

@@ -1,6 +1,6 @@
-// Imported by the server: no i18n here. The text stays English data; layers
-// show it translated (translateKnown).
-const msg = (text) => text;
+// Imported by the server: the catalog-free marker, not src/i18n/index.js. The
+// text stays English data; layers show it translated (translateKnown).
+import { msg } from '../i18n/marker.js';
 
 const tooLarge = () =>
   Object.assign(new Error(msg('Upstream response too large')), {