## Summary

- Replace separate room and Planner actions with one Send button. - Route messages to Planner only when `@ai` addresses it; otherwise send them to the room. - Use compact icon controls for sending and stopping Planner. - Expand end-to-end coverage for routing, queuing, disconnects, responsive layout, and updated controls. - Remove the obsolete local-agent MCP tail plan.

## Testing

- Updated and expanded Playwright UI tests for conversation behavior and responsive layouts. - Updated unit coverage for the migrated composer controls.