* feat(background-plugin): enhance background plugin with logo support and neumorphism effects
- Add comprehensive logo support (text and image)
- Implement neumorphism visual effects for modern UI
- Add customizable background colors and dot patterns
- Fix logo position jumping during canvas scrolling
- Add complete Chinese and English documentation
- Add visual examples and type definitions
- Update navigation metadata for documentation
Features:
- Logo positioning with 5 preset locations
- Neumorphism effects with configurable shadows
- Custom background colors and dot styling
- Smooth logo rendering during viewport changes
- Comprehensive documentation with examples
* fix(playground-react): fix background plugin type compatibility
- Fix TypeScript error when background option is boolean
- Ensure proper type handling for BackgroundLayerOptions
* fix(docs): remove incorrect number from sub-canvas plugin heading
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Co-authored-by: husky-dot <xiaozhi@172-0-8-36.lightspeed.rcsntx.sbcglobal.net>
