- Close+clear the adopted logical voice session when a config/provider change
invalidates a realtime prefetch (a live call is preserved); prevents the
gateway rejecting a stale voiceSessionId resume under a new provider.
- Retry talk.client.close (0/500/2000ms) before forgetting the session, matching
the web client, so a transient close does not orphan it until the 6h sweep.
- Surface exhausted transcript-persist failures through the session delegate so a
dropped affirmation transcript no longer silently blocks spoken confirmation.
- Localize the "Confirmation needed" status through the presentation switches;
add its native locale translations.
