- Added a new message key for displaying remaining time until the end of the shift in both English and Russian.
- Updated the current duty card to show remaining time with a formatted string.
- Enhanced the contact links to support block layout with icons for phone and Telegram, improving visual presentation.
- Implemented a new utility function to calculate remaining time until the end of the shift.
- Added unit tests for the new functionality, ensuring accurate time calculations and proper rendering of contact links.
- Added Node.js setup and webapp testing steps to the CI workflow for improved integration.
- Updated HTML to link multiple CSS files for better modularity and organization of styles.
- Removed deprecated `style.css` and introduced new CSS files for base styles, calendar, day detail, hints, markers, states, and duty list to enhance maintainability and readability.
- Implemented new styles for improved presentation of duty information and user interactions.
- Added unit tests for new API functions and contact link rendering to ensure functionality and reliability.
