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/scenes/director.js

@@ -507,9 +507,8 @@ export class SceneDirector {
 
     const scene = {
       id: uid('scene'),
-      title:
-        sceneName.trim() ||
-        t('Scene {n}', { n: this._project.scenes.length + 1 }),
+      // i18n-ignore: stored English, like normalizeProject; displaySceneTitle translates it.
+      title: sceneName.trim() || `Scene ${this._project.scenes.length + 1}`,
       shots: [],
     };
 
@@ -967,9 +966,8 @@ export class SceneDirector {
     const shot = normalizeShot(
       {
         id: uid('shot'),
-        title: t('Shot {n}', {
-          n: scene.shots.length + 1,
-        }),
+        // i18n-ignore: stored English; displayShotTitle translates it when shown.
+        title: `Shot ${scene.shots.length + 1}`,
         durationSec: DEFAULT_SHOT_DURATION_SEC,
         holdSec: DEFAULT_HOLD_SEC,
         camera,