blueBox method
Wraps the widget in a ColoredBox with system blue color.
Uses CupertinoColors.systemBlue which adapts to light/dark mode. This is the standard blue color used throughout iOS interfaces, commonly used for links, primary actions, and informational elements.
Returns a ColoredBox containing the current widget with blue background.
Example:
Text('Learn More').blueBox()
Implementation
ColoredBox blueBox() => coloredBox(CupertinoColors.systemBlue);