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/ui/localePicker.js

@@ -2,10 +2,8 @@
  * Interface language picker: a HUD button in the bottom-right corner that
  * opens a listbox of the shipped languages.
  *
- * The ordering, search filter, keyboard model and choice rule are pure
- * functions below, testable without a DOM (localePicker.test.mjs).
- * mountLocalePicker() binds them to the #locale-picker markup; the shell only
- * mounts it and decides what choosing another language does (confirm, reload).
+ * The logic is pure and DOM-free; mountLocalePicker() only renders it. The
+ * shell decides what a choice does (confirm, reload).
  *
  * The list follows the ARIA listbox pattern: the button opens it, focus moves
  * into the list (or into the search field, which is a combobox, once there are