Implement visual designer for Object UI schemas

[Copilot]

Adds @object-ui/designer package - a visual editor for creating and modifying Object UI schemas through a GUI.

Components

• DesignerContext: State management for schema, selection, and CRUD operations
• Canvas: Live preview with click-to-select and visual highlighting
• ComponentPalette: Categorized browser for 50+ components (Form, Layout, Overlay, etc.)
• PropertyPanel: Dynamic forms generated from component metadata with type-specific inputs
• Toolbar: JSON import/export with modal editor
• Designer: Main component integrating three-column layout

Usage

import { Designer } from '@object-ui/designer';

function App() {
  const [schema, setSchema] = useState({ type: 'div', body: [] });
  return <Designer initialSchema={schema} onSchemaChange={setSchema} />;
}

Implementation Details

• Real-time preview updates on property changes
• Automatic ID generation for all nodes
• Recursive tree operations for nested schemas
• Support for both single-node and array body types
• Click-to-add workflow (drag-and-drop deferred)

Documentation

• English README with API reference
• Chinese implementation guide
• Visual layout documentation
• Working demo application

Node operations handle schema mutation immutably. Selection state syncs across all panels via Context. Component metadata drives property form generation dynamically.

Original prompt

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Pull request overview

This PR implements a comprehensive visual designer package for creating and modifying Object UI schemas through a graphical interface. The designer provides real-time preview, component palette, property editing, and JSON import/export capabilities.

Changes:

• Added @object-ui/designer package with 6 core React components
• Implemented context-based state management for schema operations
• Created demo application with Vite + React 19
• Added comprehensive documentation (English README, Chinese implementation guide, visual guide)

Reviewed changes

Copilot reviewed 21 out of 22 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
packages/designer/tsconfig.json	Configured TypeScript with ES2020 target, module paths, and build settings
packages/designer/src/index.ts	Main entry point exporting Designer components, context, hooks, and types
packages/designer/src/context/DesignerContext.tsx	State management context with schema CRUD operations and helper functions
packages/designer/src/components/Toolbar.tsx	Top toolbar with JSON import/export and modal editor
packages/designer/src/components/PropertyPanel.tsx	Dynamic property editor with type-specific inputs
packages/designer/src/components/Designer.tsx	Main component integrating three-column layout
packages/designer/src/components/ComponentPalette.tsx	Categorized component browser with click-to-add functionality
packages/designer/src/components/Canvas.tsx	Live preview canvas with selection and hover highlighting
packages/designer/package.json	Package configuration with dependencies and scripts
packages/designer/VISUAL_GUIDE.md	Visual documentation of interface layout and features
packages/designer/README.md	Comprehensive usage guide with API reference
packages/designer/IMPLEMENTATION.zh-CN.md	Chinese implementation guide
examples/designer-demo/*	Complete demo application setup
DESIGNER_SUMMARY.md	Bilingual implementation summary

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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[Copilot]

The exclude pattern '../renderer' and '../ui' use relative paths that may not work as intended from the tsconfig location. Consider using absolute patterns or verifying these paths exclude the intended directories.

Suggested change

	"exclude": ["node_modules", "dist", "../renderer", "../ui"]
	"exclude": ["node_modules", "dist"]

[Copilot]

Using Math.random() for ID generation can result in collisions. Consider using a more robust ID generation method like crypto.randomUUID() or a library like uuid for guaranteed uniqueness.

[Copilot]

Using alert() is not user-friendly and blocks the UI. Consider using a toast notification or non-blocking feedback mechanism instead.

[Copilot]

Using confirm() is not consistent with modern UI patterns. Consider using a custom dialog component or alert-dialog from @object-ui/ui for better user experience.

[Copilot]

The 'content' field is for Tailwind CSS configuration, not PostCSS. This configuration should be in tailwind.config.js. PostCSS config should only contain plugins like 'tailwindcss' and 'autoprefixer'.

Suggested change

	content: [
	"./index.html",
	"./src/**/*.{js,ts,jsx,tsx}",
	"../../packages/ui/src/**/*.{js,ts,jsx,tsx}",
	"../../packages/renderer/src/**/*.{js,ts,jsx,tsx}",
	"../../packages/designer/src/**/*.{js,ts,jsx,tsx}",
	],
	plugins: {
	tailwindcss: {},
	autoprefixer: {},
	},

[github-actions]

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