Fix default value assignment for preferredLanguage.

[System233]

Description

Language codes such as zh-cn are not mapped correctly

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?

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

Related Issues

Reviewers

---

Important

Fixes language code mapping in ClineProvider.ts to correctly map zh and zh-cn to "Simplified Chinese".

• Behavior:
  • Fixes language code mapping in ClineProvider.ts to correctly map zh and zh-cn to "Simplified Chinese".
  • Updates default language mapping logic to handle full language codes before splitting by -.
• Misc:
  • No changes to tests or documentation.

^{This description was created by for bb38b4a. It will automatically update as commits are pushed.}

[changeset-bot]

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Latest commit: bb38b4a

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[ellipsis-dev]

Please consider adding unit tests for various locale formats (e.g., 'en-US', 'pt-BR', etc.) to ensure the fallback works as expected.