- Move language switcher from header to settings modal for better organization
- Implement modern segment control UI instead of radio buttons for language selection
- Add language preference persistence in localStorage and backend settings
- Support instant language preview with cancel/revert functionality
- Remove standalone LanguageSwitcher component
- Improve initial language detection logic (localStorage -> browser -> default)
- Add proper i18n keys for language settings UI text
* feat: integrate i18next for internationalization support
- Added i18next and react-i18next dependencies for localization.
- Updated various components to utilize translation functions for user-facing text.
- Enhanced user experience by providing multilingual support across the application.
* feat: improve i18n implementation with better translations and accessibility
- Add proper i18n keys for language switcher tooltips and aria-labels
- Replace hardcoded Chinese console error messages with i18n keys
- Add missing translation keys for new UI elements
- Improve accessibility with proper aria-label attributes
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Co-authored-by: Jason <farion1231@gmail.com>
