[TF-4678][Part 2] Sidebar section header and navigation controls - #91

please rebase

• Design's icons are 16px square with no space in-between, app's are 24px with 8px in-between

Fixed

please rebase

Done

Dark-mode Compose button borrowed Material's default hover/press tint (onPrimary) instead of our own foreground — fixed + pinned with a test:

// lib/sidebar/linagora_sidebar_button_styles.dart
overlayColor: WidgetStateProperty.resolveWith((states) {
  if (states.contains(WidgetState.pressed)) {
    return foreground.withValues(alpha: _pressedOverlayOpacity);
  }
  if (states.contains(WidgetState.hovered)) {
    return foreground.withValues(alpha: _hoverOverlayOpacity);
  }
  if (states.contains(WidgetState.focused)) {
    return foreground.withValues(alpha: _pressedOverlayOpacity);
  }
  return null;
}),

// test/sidebar/linagora_sidebar_button_styles_test.dart
expect(
  style.overlayColor?.resolve({WidgetState.hovered}),
  foreground.withValues(alpha: 0.08),
  reason: 'hovered, $brightness',
);

Dark-mode Compose button borrowed Material's default hover/press tint (onPrimary) instead of our own foreground — fixed + pinned with a test:

// lib/sidebar/linagora_sidebar_button_styles.dart
overlayColor: WidgetStateProperty.resolveWith((states) {
  if (states.contains(WidgetState.pressed)) {
    return foreground.withValues(alpha: _pressedOverlayOpacity);
  }
  if (states.contains(WidgetState.hovered)) {
    return foreground.withValues(alpha: _hoverOverlayOpacity);
  }
  if (states.contains(WidgetState.focused)) {
    return foreground.withValues(alpha: _pressedOverlayOpacity);
  }
  return null;
}),

// test/sidebar/linagora_sidebar_button_styles_test.dart
expect(
  style.overlayColor?.resolve({WidgetState.hovered}),
  foreground.withValues(alpha: 0.08),
  reason: 'hovered, $brightness',
);

Fixed. The hover, pressed, and focused overlays now derive from the button’s resolved foreground instead of Material’s default onPrimary tint. I also added coverage for light and dark themes, including hover, pressed, focused, and disabled states.