ThemeModifier class final

A content modifier that applies theme data to a content subtree.

Features:

• Theme mode specification
• Integration with ThemeService
• Subtree theme overrides
• Fallback handling

Example:

// Apply light theme to content
final content = Card(
  title: 'My Card',
  modifiers: [
    ContentModifier(
      configuration: ThemeModifier(mode: ThemeMode.light),
    ),
  ],
);

// Apply dark theme to content
final content = Group(
  items: [myCard, myDivider],
  modifiers: [
    ContentModifier(
      configuration: ThemeModifier(mode: ThemeMode.dark),
    ),
  ],
);

The modifier:

• Gets theme data from ThemeService
• Wraps content in a Theme widget
• Falls back to original content if no theme data
• Affects all descendants of the modified content