tealBox method
Wraps the widget in a ColoredBox with system teal color.
Uses CupertinoColors.systemTeal which adapts to light/dark mode. This is the standard teal color used throughout iOS interfaces, often used for communication or water-themed elements.
Returns a ColoredBox containing the current widget with teal background.
Example:
Icon(CupertinoIcons.phone).tealBox()
Implementation
ColoredBox tealBox() => coloredBox(CupertinoColors.systemTeal);