ControlSectionBuilder class

Utility class for building common control panel sections.

This builder reduces boilerplate by providing reusable widgets for:

• Sliders (numeric values)
• Switches (boolean values)
• Color pickers
• Section headers
• State-specific control groups (colors, overrides)

Usage:

final builder = ControlSectionBuilder(
  state: myState,
  onUpdate: () => setState(() {}),
  isDarkMode: isDarkMode,
  context: context,
);

builder.buildSlider('Width', state.width, 100, 400, (v) => state.width = v);