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/keySetup.test.mjs

@@ -174,6 +174,7 @@ test('aborting pending setup removes its surface and ignores a late response', a
   resolveResponse({ ok: true, json: async () => ({ keys: [] }) });
   assert.equal(await pending, null);
 });
+
 test('a pasted, unsaved key makes the language switch ask first until teardown', async () => {
   const node = () => ({
     dataset: {},