- Add proper type guards for all widget input specs (Color, TreeSelect, MultiSelect, FileUpload, Galleria)
- Enhance schemas with missing properties (format, placeholder, accept, extensions, tooltip)
- Fix widgets to honor runtime props like disabled while accessing spec metadata
- Eliminate all 'as any' usage in widget components with proper TypeScript types
- Clean separation: widget.spec.options for metadata, widget.options for runtime state
- Refactor devtools into modular structure with vue_widgets showcase nodes
