Keep Authoring within its stack and theme, and cover its wiring

- Keep the documented 72px / flex-grow 1 action sizing and the 360px
  panel width; the larger type applies to the Authoring panel only, so
  CCTV and Street Level buttons are unchanged.
- Scope the primary and file-row styles to the panel so Cyber's shared
  button surface no longer overrides them.
- Shorten the scene PLAY in Spanish and Russian so it does not break
  mid-word, and fix two translation inconsistencies.
- Map the spoken name "authoring" to the panel.
- Clear the has-shots marker when the controls are destroyed.
- Test the idle button states through published changes, the PLAY
  translation context, and where the sharing row is placed.

src/i18n/locales/es.json

@@ -3012,9 +3012,9 @@
   "Add the current view, style and layers as the next shot": "Añade la vista, el estilo y las capas actuales como el siguiente plano",
   "Replace the selected shot with the current view": "Sustituye el plano seleccionado por la vista actual",
   "Click a shot to select it, double-click to rename.": "Haz clic en un plano para seleccionarlo y doble clic para cambiarle el nombre.",
-  "scene|PLAY": "REPRODUCIR",
+  "scene|PLAY": "REPROD.",
   "Play the whole scene from its first shot": "Reproduce toda la escena desde su primer plano",
-  "Stop playback (Esc)": "Detiene la reproducción (Esc)",
+  "Stop playback (Esc)": "Detén la reproducción (Esc)",
   "Play only the shot after the selected one": "Reproduce solo el plano posterior al seleccionado",
   "SAVE & SHARE": "GUARDAR Y COMPARTIR",
   "Download every scene as a JSON file you can import later": "Descarga todas las escenas como un archivo JSON que puedes importar más tarde",