OperatorView never fetched asterisk-bridge's GET
/asterisk/live-calls/{call_id}/ai-summary endpoint for voice calls —
the useEffect that loads conversation content only covered telegram
and whatsapp threads, so the voice panel showed just a Call ID and AI
state string, no transcript of what was actually said, even though
the backend already had the full data (transcript_segments,
customer_request_text, ai_outcome_text).
Add BackendVoiceAISummary types, poll the ai-summary endpoint while a
voice interaction is selected, and render the transcript + AI
request/outcome summary in VoiceWorkspace.
