i18n: fix the repeat-review findings

- Status pieces translate in one place (src/ui/statusText.js): a Local
  ADS-B error with a single piece now translates, and the analyst card
  splits empty-layer notes into pieces (Transit, Local ADS-B).
- Translate the ALPR retry chip text, the ECCC error on the Air quality
  card, "Upstream response too large" and the "entry {n}" feed label.
- The unmarked-text check also sees error/loadingLabel/statusMessage/
  status assignments, `status:` properties and showToast?.( /
  this._showToast( calls; the scene import preview marks its pack
  statuses, data and model-facing text carry i18n-ignore with a reason.
- Tests check the real code: the HUD locality formatter moves to
  src/hudLocalityFormat.js, the unsaved-keys test pins the teardown.
- One copy each: city names come from src/cityPois.js, the GNSS HTTP
  template and wind "field unavailable" texts; dead fallbacks removed.
- Leftovers of the reverted vessel-label change and the reformatting of
  detectionHost.test.mjs / keySetup.test.mjs are back to main.

Catalogs: es/ru 2617 messages each, complete.

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

src/keySetup.js

@@ -389,14 +389,9 @@ export async function initKeySetup({
   // A pasted key lives only in its field until Save: switching language (a
   // reload) asks first while any field holds one.
   const unregisterUnsavedWork = registerUnsavedWork(() =>
-    !disposed &&
-    Object.keys(
-      collectKeyUpdates(
-        [...(root.querySelectorAll?.('input[data-env-var]') || [])].map(
-          (input) => ({ envVar: input.dataset?.envVar, value: input.value }),
-        ),
-      ),
-    ).length
+    [...(root.querySelectorAll?.('input[data-env-var]') || [])].some((input) =>
+      String(input.value ?? '').trim(),
+    )
       ? msg('unsaved provider keys')
       : null,
   );