How to focus panes rather than move into them?

The following focus keybindings seem to have been deprecated:

```
focus_right: Some(( code: Char('l'), modifiers: ( bits: 0,),)),
focus_left: Some(( code: Char('h'), modifiers: ( bits: 0,),)),
focus_above: Some(( code: Char('k'), modifiers: ( bits: 0,),)),
focus_below: Some(( code: Char('j'), modifiers: ( bits: 0,),)),
```

Is there still a way to achieve this behaviour of focusing the right pane without moving into it fully?

The issue mentions only the deprecated focus_right, focus_left, focus_above, and focus_below keybindings; it names no files, tests, or entry points. Start by locating the Rust CLI's current pane-focus keybinding handling and its deprecation history, then determine whether the requested behavior should be restored or documented and verify the result interactively.

Written by the indexing model from the issue text.