sequenceDiagram
    actor User
    participant TUI as TUI Layer
    participant Handler as Command Handler
    participant Agent as Agent Runner
    
    rect rgba(200, 150, 100, 0.5)
    Note over User,Agent: Agent Cancellation Flow (New)
    User->>TUI: Press Ctrl+C
    TUI->>TUI: Open cancel confirmation dialog
    User->>TUI: Confirm cancellation
    TUI->>Handler: Send signal via cancelAgentCh
    Handler->>Handler: Call s.cancelFunc()
    Handler->>Agent: Context cancelled
    Agent->>Handler: Stop execution, return error
    Handler->>TUI: AgentDoneMsg with "context canceled"
    TUI->>User: Display "⏹ Agent cancelled."
    end
    
    rect rgba(100, 150, 200, 0.5)
    Note over User,Handler: Approval Mode Change Flow (New)
    User->>TUI: Press Ctrl+A or click "Approve all"
    TUI->>Handler: Invoke OnApprovalModeChange callback
    Handler->>Handler: Update approval state
    end