[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.

通过打开 Claude 侧边栏，在其提示输入框中进入插入模式，并尝试 Neovim 窗格和侧边栏快捷键来复现该问题。首先跟踪侧边栏提示输入和按键处理；完成的标准是这些快捷键能够正常工作而不会结束当前 agent 会话，或者由专用的退出快捷键保留该会话。

由索引模型根据 Issue 内容生成。