- Add react-error-boundary dependency to webview-ui package
- Create custom ErrorBoundary component with VSCode-themed fallback UI
- Add internationalization support for error messages
- Wrap all major view components (ChatView, SettingsView, HistoryView, etc.) with error boundaries
- Implement error reporting utility for centralized error collection
- Add comprehensive test coverage for ErrorBoundary component
- Configure Vitest for React development mode to support testing
Fixes#5731