- Include mid on the wire in sendChat() so recipients can reference it
- Handle incoming 'reaction' wire message in PeerConn._onControl
- Add PeerConn.sendReaction() to send the reaction wire message
- Handle 'send_reaction' IPC command in BrowserAdapter.send()
- Emit 'reaction' IPC event on receive and on local send
- Use wire mid (not synthetic peer-ts mid) when receiving chat messages
Reactions now work across all combinations: daemon↔daemon,
browser↔browser, and daemon↔browser.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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