i18n(pt): apply review round 2

Three-model review (astra, sol, fable), round 2: 29 of 30 findings
applied, one of them in part.

- pt: FIRMS «mais recente há», CCTV «cruzamentos», degraded radio
  directory, «{layers}: ativação recente» for any layer list, «Sem
  imagem», NIVELADO, AJUSTA-SE, quoted Provider Settings, V/S kept on
  the ADS-B card, no-break space in «(24 h)» / «(30 d)», and more
  (see docs/translations/pt.md).
- Malformed cyclone snapshot is now a catalog message (all locales).
- Markup supports data-i18n-context; the radio STATION TAG option uses
  "radio tag|All", so it no longer flips gender when the list loads.

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

src/i18n/same-as-english.json

@@ -225,6 +225,7 @@
     "Techno",
     "Trance",
     "USB {rate} msg/s",
+    "V/S {rate}",
     "VISUAL",
     "VOLUME",
     "VS",