fix(voice): keep a stopped round's actions and follow-up memory

A reply stopped partway through a round now keeps the actions that ran,
answering the calls it never reached as skipped, so the history stays
paired for both providers. A failed typed turn no longer resets the
pointer, referents and follow-up memory, since its conversation continues.

The server now tells a rejected key (401, or Gemini's 400 with reason
API_KEY_INVALID, matched exactly), denied access (403) and an account out
of credit (OpenAI's 429 insufficient_quota) apart; each cools down for a
minute and gets its own message in the chat.

src/i18n/locales/es.json

@@ -3083,5 +3083,7 @@
   "That request needed too many steps. Changes already made to the map stay in place.": "Esa solicitud necesitó demasiados pasos. Los cambios ya hechos en el mapa se mantienen.",
   "That request needed too many steps. Try a simpler request.": "Esa solicitud necesitó demasiados pasos. Prueba una solicitud más sencilla.",
   "The provider rejected the API key. Check it in Provider Settings.": "El proveedor rechazó la clave de API. Revísala en Ajustes del proveedor.",
-  "Too many chat requests. Try again in {seconds} s.": "Demasiadas solicitudes de chat. Vuelve a intentarlo en {seconds} s."
+  "Too many chat requests. Try again in {seconds} s.": "Demasiadas solicitudes de chat. Vuelve a intentarlo en {seconds} s.",
+  "The provider refused access for this key. Check the key's project, region or permissions.": "El proveedor denegó el acceso a esta clave. Revisa el proyecto, la región o los permisos de la clave.",
+  "The provider account is out of credit. Check its billing, or choose another AI Provider in Settings.": "La cuenta del proveedor no tiene crédito. Revisa la facturación o elige otro proveedor de IA en Ajustes."
 }