- Add compact command with proper API parameters (providerID, modelID)
- Implement undo command matching TUI behavior:
- Find previous user message before revert point
- Restore reverted message to prompt input
- Filter messages client-side based on session.revert field
- Add init command with proper hex-encoded message ID generation
- Add session.revert field handling:
- Parse revert field from API responses in fetchSessions and createSession
- Update revert field via SSE session.updated events
- Filter messages during render when revert point is set
- Add SSE event handlers for session.compacted and session.error
- Add force reload option to loadMessages for post-compact refresh
- Messages now filter instantly based on revert state without API reload
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