- Create PreprocessingPreview component with debounced config updates - Show original vs preprocessed images side-by-side - Display image quality metrics (contrast, sharpness) with quality indicators - Add zoom controls and fullscreen view for detailed inspection - Show auto-detected configuration when in auto mode - Integrate preview toggle with PreprocessingSettings component - Add i18n translations for preview panel UI 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>