Drop the Radio icon from Context and make the panel easier to read

The Context header carried a Radio icon that opened a second, compact
Radio player on top of the panel, duplicating the Radio section that
already lives inside Context. Remove the icon, the compact player and
everything that kept the two in step. Radio stays in Context as its own
section with one Enable control; Cockpit's compact Radio is unchanged.

Context itself was hard to read: 7-8 px labels at low contrast, a dashed
placeholder box, and a glow halo. The two modes are now one segmented
control, labels and guidance are 10 px at higher contrast, the standby
hint is plain text, section titles use --text-secondary, and the panel
draws no glow.

Unused translations are pruned, tests and QA harnesses that pinned the
compact player are updated or retired, and CURRENT-STATE and the
changelog describe the new header.

src/i18n/locales/es.json

@@ -198,21 +198,13 @@
   "AVAILABLE MISSIONS": "MISIONES DISPONIBLES",
   "SELECT A MISSION TO INSPECT": "SELECCIONA UNA MISIÓN PARA INSPECCIONAR",
   "LOADING 30-DAY MISSION INDEX": "CARGANDO ÍNDICE DE MISIONES DE 30 DÍAS",
-  "Open compact Radio controls": "Abrir los controles compactos de Radio",
-  "Compact Radio controls": "Controles compactos de Radio",
   "RADIO": "RADIO",
-  "RADIO READY": "RADIO LISTA",
-  "Open detailed Radio controls": "Abrir los controles detallados de Radio",
-  "Close compact Radio controls": "Cerrar los controles compactos de Radio",
   "ENABLE": "ACTIVAR",
   "Previous filtered radio station": "Emisora de radio filtrada anterior",
-  "Previous station": "Emisora anterior",
   "Play selected radio station": "Reproducir la emisora de radio seleccionada",
   "Play": "Reproducir",
   "Next filtered radio station": "Siguiente emisora de radio filtrada",
-  "Next station": "Siguiente emisora",
   "VOLUME": "VOLUMEN",
-  "Compact Radio volume": "Volumen de la Radio compacta",
   "Cockpit display and Radio controls": "Controles de visualización y Radio de la cabina",
   "Expand Cockpit display options": "Expandir las opciones de visualización de la cabina",
   "Cockpit display options": "Opciones de visualización de la cabina",
@@ -357,8 +349,6 @@
   "selected": "seleccionada",
   "nearest": "más cercana",
   "{action} {target} radio station": "{action} la emisora de radio {target}",
-  "RADIO STATE UNCERTAIN": "ESTADO DE RADIO SIN CONFIRMAR",
-  "SYNCING DIRECTORY": "SINCRONIZANDO DIRECTORIO",
   "SYNCING": "SINCRONIZANDO",
   "station": "emisora",
   "Ready": "Listo",
@@ -2442,8 +2432,6 @@
   "Exit cockpit to fly to a route": "Sal de la cabina para volar a una ruta",
   "Exit cockpit to fly to a file": "Sal de la cabina para volar a un archivo",
   "Exit cockpit to fly to a scene": "Sal de la cabina para volar a una escena",
-  "Go to expanded Radio section": "Ir a la sección de Radio expandida",
-  "Expand Radio section in Context": "Expandir la sección de Radio en Contexto",
   "New scene name": "Nombre de la nueva escena",
   "Delete scene \"{scene}\" and all shots?": "¿Eliminar la escena \"{scene}\" y todos sus planos?",
   "Detailed outline unavailable": "Contorno detallado no disponible",