### Summary of Changes
- Introduced theme-aware CSS variables for consistent styling across light and dark modes.
- Updated `App.jsx` to manage theme settings and improve layout responsiveness.
- Refactored `OfflineMode` component to provide detailed connection status and quick actions for users.
- Enhanced `Dashboard`, `Settings`, and `SystemMetrics` components to utilize new theme variables and improve UI consistency.
- Updated service URLs in constants and API documentation to reflect new configurations.
### Expected Results
- Improved user experience with a cohesive design that adapts to user preferences.
- Enhanced offline functionality, providing users with better feedback and control during service outages.
- Streamlined codebase with consistent styling practices, making future updates easier.
### Summary of Changes
- Changed the host binding in `main.py` from `0.0.0.0` to `127.0.0.1` to restrict access to localhost, enhancing security by preventing external access.
### Expected Results
- Improved security posture of the service-adapters module by limiting the network exposure of the application.
