switchControl method
Returns a styled switch/toggle control.
Displays "✓ ON " or "□ OFF" based on the on state.
Implementation
String switchControl(bool on) {
final col = on ? theme.checkboxOn : theme.checkboxOff;
final sym = on ? glyphs.checkboxOnSymbol : glyphs.checkboxOffSymbol;
final text = on ? ' ON ' : ' OFF';
return '$col$sym$text${theme.reset}';
}