feat(gateway,cli,types): wire token usage, model info, and thinking levels
Gateway:
- Emit session:info on session creation with provider, model, thinking level
- Include SessionUsagePayload in agent:end with token stats, cost, context usage
- Handle set:thinking client event to cycle thinking levels
- Respond with updated session:info after thinking level change
Types (@mosaic/types):
- Add SessionUsagePayload (tokens, cost, context) to AgentEndPayload
- Add SessionInfoPayload (provider, model, thinking level, available levels)
- Add SetThinkingPayload and set:thinking to ClientToServerEvents
- Add session:info to ServerToClientEvents
CLI TUI:
- useSocket now tracks tokenUsage, modelName, providerName, thinkingLevel
- Updates from both session:info and agent:end usage payload
- Ctrl+T cycles thinking level via set:thinking socket event
- Footer shows thinking level next to model (e.g. 'claude-opus-4-6 • medium')
- Token stats populate with real ↑in ↓out Rcache Wcache $cost ctx%
Jason Woltje
a061a64fff