pub fn register_help_mode_actions(registry: &mut CommandRegistry)Expand description
Register help-mode’s action:help-dismiss command so
translate_mode_keymaps can resolve the <Esc> binding’s cmd name. Its
body emits [Effect::DismissPopup]; the host resolves HOW to dismiss (close
the help-owned split pane, dismiss a floating popup, or restore the buffer
active-pane help displaced) — the mode owns the chord + the decision, the
pane/popup mechanism stays host-side behind the effect boundary. Called at
boot beside register_repl_mode_actions while the registry is mutable; an
unresolvable name would drop the whole binding with a warn.