Module keymap 

Key → UserAction mapping.

Goal-144 widens this from a thin KeyCode forwarder to a full KeyEvent forwarder so that modifier-aware bindings (the new Ctrl+E toggle on the most recent ToolResult block) are handled uniformly inside App::handle_key.

Goal-145 will introduce mode-aware mapping (Insert / Command / Visual …) and that logic will grow here.

Functions

dispatch

Dispatch a key event onto the app state. Returns an optional UserAction the caller must forward to the agent worker.