fix(web): relay Codex responses to voice sessions

[PeterDraex]

Summary

• format Codex message payloads for realtime voice context so completed Codex responses reach ElevenLabs sessions
• format Codex tool calls through the same voice helper as Claude tool calls
• trigger the voice ready notification when a ready/completion event arrives as a message, not only when session.thinking transitions

Testing

• bun run test src/realtime/hooks/contextFormatters.test.ts src/components/SessionChat.test.ts
• bun run typecheck:web

[github-actions]

Findings

• [Major] Historical ready messages can trigger fresh voice-ready prompts — newMessages here means “not in this component ref yet,” not “arrived live.” Initial message hydration, refetches, or loading older history can add old ready / task_complete messages to props.messages; the new scan then calls reportVoiceReady() and sends a stale ready prompt to an active voice session. Evidence: web/src/components/SessionChat.tsx:244
  Suggested fix:

  // Move ready detection to the live SSE message path instead of scanning the
  // whole visible message window in SessionChat.
  if (event.type === 'message-received') {
      ingestIncomingMessages(event.sessionId, [event.message])
      if (
          event.sessionId === getCurrentRealtimeSessionId()
          && isVoiceReadyMessage(event.message)
      ) {
          voiceHooks.onReady(event.sessionId)
      }
  }

Summary

• Review mode: initial
• One issue found: the new ready-message trigger can replay historical completion events as current voice-ready notifications.

Testing

• Not run (automation)

HAPI Bot

[github-actions]

[Major] Historical ready messages can trigger fresh voice-ready prompts

newMessages is only “not present in prevMessagesRef,” so it also includes messages introduced by initial hydration/refetch and older-history loads. With this new branch, any historical ready / task_complete in those batches calls reportVoiceReady() and can send a stale ready prompt to an active voice session.

Suggested fix:

// Move ready detection to the live SSE message path instead of scanning the
// whole visible message window in SessionChat.
if (event.type === 'message-received') {
    ingestIncomingMessages(event.sessionId, [event.message])
    if (
        event.sessionId === getCurrentRealtimeSessionId()
        && isVoiceReadyMessage(event.message)
    ) {
        voiceHooks.onReady(event.sessionId)
    }
}