- Add a new dashboard TUI renderer with logs, system, utilities, stats, and settings sections
- Wire runDashboard to auto-enable TUI in TTY sessions with reactive task/agent updates and utility keybindings
- Keep non-TTY behavior unchanged by falling back to the existing plain-text startup output
- Add CLI tests and docs for TUI behavior, keyboard shortcuts, and auth/usage guidance
- Ensure dashboard WebSocket auth checks respect --no-auth consistently
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