feat: enhance template gallery with @hanzo /ui integration and new templates

fix: Resolve React compatibility and build issues

feat: Complete @hanzo /ui integration with proper imports

feat: Complete shadcn/ui integration with Tailwind CSS enhancements

Fix build: Add @hanzo /ui with type definitions, create local utils

Remove @hanzo dependencies to fix Docker build

Initial commit: Hanzo Template Gallery with 8 professional templates using @hanzo /ui