🔒 1.6.6 Security Patch

What's Changed

Security and deployment fixes:

• Update vitest to v3.2.4 to fix esbuild vulnerability (GHSA-67mh-4wv8-2f99)
• Update workflow to use correct build output directory (build/ instead of dist/)
• All 19 tests continue to pass with updated vitest
• Updated build tools for better security and performance
• Complete resolution of all known security issues

Full Changelog: 1.6.0...1.6.6