Implemented localization system similar to the media-server project pattern:
- Created locale JSON files for English (en.json) and Russian (ru.json)
- Added complete translations for all UI elements, buttons, labels, and messages
- Implemented locale management system with browser locale detection
- Added language selector dropdown in header
- Applied data-i18n, data-i18n-title, and data-i18n-placeholder attributes
- Translations stored in localStorage and persist across sessions
- Automatic language detection from browser settings
- All dynamic content (displays, devices, modals) now uses translation function
Translations cover:
- Authentication (login/logout)
- Displays (layout visualization, cards, labels)
- Devices (management, status, actions)
- Settings modal (brightness, device configuration)
- Calibration modal (LED mapping, testing)
- Error messages and notifications
- Server status and version information
The implementation uses:
- Simple t(key, params) translation function with parameter substitution
- Async locale loading from /static/locales/{locale}.json
- updateAllText() to refresh all UI elements when language changes
- Fallback to English if translation file fails to load
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
