- Add Arch Linux (pacman) support to server operations: CheckUpdates, InstallDocker, InstallPrerequisites, UpdatePackage
- Implement parsePacmanOutput() to parse 'pacman -Qu' output format
- Add security improvement: package name sanitization to prevent command injection
- Initialize variables in CheckUpdates to prevent undefined variable errors in catch block
- Use proper Arch pacman flags: -Syu for full system upgrade before operations
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
