- Rename npm packages from @kb/* to @hai/* and update all workspace references
- Rename CLI binary from kb to hai and config directory from .kb to .hai
- Update dashboard UI branding, titles, and references from kb to hai
- Update all test files, CI workflows, and documentation to reflect new naming
- Run comprehensive grep verification to ensure no stale kb references remain
- Add macOS signing script with codesign, notarization, and stapling support
- Add Windows signing script using signtool with PFX certificate
- Integrate signing steps into release and test-release workflows
- Add signing workflow tests and verification coverage
- Add CODE_SIGNING.md documentation and update README
