Fix TreeView checkbox styling to align with theme colors

[Copilot]

TreeView checkboxes were using the Toggle class with inputActiveOption* colors, causing them to turn blue when checked instead of following the current theme colors. This made them inconsistent with other checkboxes throughout VS Code.

Problem

The issue was a mismatch between the CSS and JavaScript implementation:

• CSS: Already set up to use proper checkbox theme colors (--vscode-checkbox-* variables)
• JavaScript: Creating DOM elements with Toggle class using input option colors

Solution

Replace Toggle with Checkbox in the TreeItemCheckbox class to align the code with the CSS expectations.

Changes Made

1. Import changes:

   • Replaced Toggle import with Checkbox import
   • Replaced defaultToggleStyles with defaultCheckboxStyles
   • Removed unused Codicon import

2. Implementation changes:

   • Changed private toggle: Toggle to private checkbox: Checkbox
   • Updated constructor to use Checkbox format: new Checkbox(title, isChecked, styles)
   • Removed manual icon handling (Checkbox handles check mark internally)
   • Added hoverDelegate to checkbox styles for proper hover behavior

3. Method updates: Updated all references from toggle to checkbox

Result

• Before: TreeView checkboxes turned blue when checked (using input option colors)
• After: TreeView checkboxes now use consistent theme colors like other checkboxes
• Functionality: Identical behavior, just proper styling

The fix ensures TreeView checkboxes now use the same consistent styling as other checkboxes throughout VS Code, respecting the current theme colors.

Fixes #252638.

Warning

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• electronjs.org
  • Triggering command: node-gyp (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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