feat: add shortcut to switch modes

[aheizi]

Description

add shortcut to switch modes.

In order to have a pure code environment, i transferred pr from #1120

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Manual testing

Checklist:

• My code follows the patterns of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation

Additional context

see #1120

Added shortcut key hints：

Related Issues

Reviewers

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Important

Adds keyboard shortcut (Cmd/Ctrl + .) to switch modes and displays shortcut hint in UI.

• New Feature:
  • Adds keyboard shortcut (Cmd/Ctrl + .) to switch modes in ChatView.tsx and ChatTextArea.tsx.
  • Displays mode switch shortcut hint in ChatTextArea.tsx.
• Functions:
  • switchToNextMode in ChatView.tsx and ChatTextArea.tsx to cycle through modes.
  • handleKeyDown in ChatView.tsx and ChatTextArea.tsx to listen for shortcut keys.
• UI Changes:
  • Adds modeShortcutText prop to ChatTextArea for displaying shortcut hint.

^{This description was created by for 3d699640d5c7a5fd9059738e082e9ca8503a3dfc. It will automatically update as commits are pushed.}

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Latest commit: 251b836

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