fix(i18n): keep English pixel-identical and stored data English

From the English-parity and breakage review against main:
- English wording back to main: "Configured Source", the "SHARED SUBJECT"
  fallback, CCTV calibration "RANGE 120m".
- Voice header and CCTV calibration chip/select tweaks for long labels now
  apply to non-English only (html:not([lang='en'])); English matches main.
  The scene select font change is scoped the same way.
- New scenes and shots store their default title in English ("Scene 3",
  "Shot 2") and translate it when shown, so a title captured in one language
  does not leak into projects, storage or shared JSON.
- Choosing a language with storage blocked keeps it in ?lang instead of
  silently doing nothing.
- One picked import file shows its name again.
- qa-l9-matrix reads the voice state from data-status, not the label.

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

src/i18n/locales/es.json

@@ -2025,5 +2025,8 @@
   "Uses registered content or linked media. Those external files are not included in a scene bundle. Their original notices still apply.": "Usa contenido registrado o medios vinculados. Esos archivos externos no se incluyen en un paquete de escena. Sus avisos originales siguen vigentes.",
   "{state} {layers}": "{state}: {layers}",
   "Selected Space Mission": "Misión espacial seleccionada",
-  "{duration}s + {hold}s": "{duration} s + {hold} s"
+  "{duration}s + {hold}s": "{duration} s + {hold} s",
+  "Configured Source": "Fuente configurada",
+  "subject": "sujeto",
+  "{value}m": "{value} m"
 }