[BUG] Can't switch panes using C-* if in Claude input mode

## Bug Description

When Claude is opened in the sidebar, and you are in insert mode to set your prompt, the shortcuts to collapse the sidebar or switch panes, are not working. I have to ESC out of it but this will kill the current agent session. Is this a known issue or a config error on my side?

## To Reproduce

Steps to reproduce the behavior:

1. Start Claude Code integration and open the Claude sidebar.
2. Enter insert mode within the prompt input field in the Claude sidebar.
3. Attempt to use Neovim shortcuts to collapse the sidebar or switch panes.

## Expected Behavior

I expect that Neovim shortcuts for collapsing the sidebar or switching panes would remain functional even when in insert mode within the Claude sidebar's prompt input. Alternatively, there should be a dedicated shortcut to exit the prompt input without killing the current agent session.

Reproduce the issue by opening the Claude sidebar, entering insert mode in its prompt field, and trying the Neovim pane and sidebar shortcuts. Start by tracing the sidebar prompt input and key handling; done means those shortcuts work without ending the current agent session, or a dedicated exit shortcut preserves it.

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