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/ui/styles/voice-cost.css

@@ -89,17 +89,18 @@
    cost past the card edge. The kicker already collapses to zero width here;
    taking it out of the row returns its gap to the state label. The row also
    reaches left over the gutter beside the mic ring: at heading height the
-   ring has already curved away. */
-#command-dock .gev-voice-heading {
+   ring has already curved away. English fits as it is, so this applies to
+   the other languages only. */
+html:not([lang='en']) #command-dock .gev-voice-heading {
   gap: 0.2rem;
   margin-left: -0.6rem;
 }
 
-#command-dock .gev-voice-heading > .gev-voice-kicker {
+html:not([lang='en']) #command-dock .gev-voice-heading > .gev-voice-kicker {
   display: none;
 }
 
-#command-dock .gev-voice-heading > #gev-voice-status {
+html:not([lang='en']) #command-dock .gev-voice-heading > #gev-voice-status {
   flex: 0 1 auto;
   min-width: 0;
   overflow: hidden;
@@ -108,24 +109,25 @@
   white-space: nowrap;
 }
 
-#command-dock .gev-voice-cost {
+html:not([lang='en']) #command-dock .gev-voice-cost {
   gap: 0.16rem;
   padding-left: 0.1rem;
 }
 
-#command-dock .gev-voice-tier-btn {
+html:not([lang='en']) #command-dock .gev-voice-tier-btn {
   min-width: 0;
   padding: 0 0.2rem;
 }
 
-#command-dock .gev-voice-cost-value {
+html:not([lang='en']) #command-dock .gev-voice-cost-value {
   letter-spacing: 0;
 }
 
 /* Live hints ("Ask or command", "Requesting microphone") run longer in other
    languages; give them a second line from the spare space under the readout
    rather than cutting them mid-word. */
-#command-dock
+html:not([lang='en'])
+  #command-dock
   #gev-voice-control:is(
     [data-status='connecting'],
     [data-status='listening'],