- Replace nested API-KEY submenu with flat three-option layout
- Add descriptive labels for each authentication method:
- Qwen OAuth: Free, up to 1,000 requests/day
- Alibaba Cloud Coding Plan: Paid, multiple model providers
- API Key: Bring your own API key
- Simplify region selection for Coding Plan (China vs Global)
- Use DescriptiveRadioButtonSelect for better visual hierarchy
- Add itemGap prop to BaseSelectionList for spacing
- Update i18n strings in en.js, zh.js, and ru.js
- Simplify custom API key configuration info view
- Clean up unused region-specific strings
Closes#2016
Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>