feat(ui-design): add comprehensive UI/UX design plugin v1.0.0

New plugin covering mobile (iOS, Android, React Native) and web
applications with modern design patterns, accessibility, and design systems.

Components:
- 9 skills: design-system-patterns, accessibility-compliance, responsive-design,
  mobile-ios-design, mobile-android-design, react-native-design,
  web-component-design, interaction-design, visual-design-foundations
- 4 commands: design-review, create-component, accessibility-audit, design-system-setup
- 3 agents: ui-designer, accessibility-expert, design-system-architect

Marketplace updated:
- Version bumped to 1.3.4
- 102 agents (+3), 116 skills (+9)

plugins/ui-design/README.md

@@ -0,0 +1,117 @@
+# UI/UX Design Plugin for Claude Code
+
+Comprehensive UI/UX design plugin covering mobile (iOS, Android, React Native) and web applications with modern design patterns, accessibility, and design systems.
+
+## Features
+
+### Core Capabilities
+- **Design Systems**: Token architecture, theming, multi-brand systems
+- **Accessibility**: WCAG 2.2 compliance, inclusive design patterns
+- **Responsive Design**: Container queries, fluid layouts, breakpoints
+- **Mobile Design**: iOS HIG, Material Design 3, React Native patterns
+- **Web Components**: React/Vue/Svelte patterns, CSS-in-JS
+- **Interaction Design**: Microinteractions, motion, transitions
+
+## Skills
+
+| Skill | Description |
+|-------|-------------|
+| `design-system-patterns` | Design tokens, theming, component architecture |
+| `accessibility-compliance` | WCAG 2.2, mobile a11y, inclusive design |
+| `responsive-design` | Container queries, fluid layouts, breakpoints |
+| `mobile-ios-design` | iOS Human Interface Guidelines, SwiftUI patterns |
+| `mobile-android-design` | Material Design 3, Jetpack Compose patterns |
+| `react-native-design` | React Native styling, navigation, animations |
+| `web-component-design` | React/Vue/Svelte component patterns, CSS-in-JS |
+| `interaction-design` | Microinteractions, motion design, transitions |
+| `visual-design-foundations` | Typography, color theory, spacing, iconography |
+
+## Agents
+
+| Agent | Description |
+|-------|-------------|
+| `ui-designer` | Proactive UI design, component creation, layout optimization |
+| `accessibility-expert` | A11y analysis, WCAG compliance, remediation |
+| `design-system-architect` | Design token systems, component libraries, theming |
+
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `/ui-design:design-review` | Review existing UI for issues and improvements |
+| `/ui-design:create-component` | Guided component creation with proper patterns |
+| `/ui-design:accessibility-audit` | Audit UI code for WCAG compliance |
+| `/ui-design:design-system-setup` | Initialize a design system with tokens |
+
+## Installation
+
+```bash
+/plugin install ui-design
+```
+
+## Usage Examples
+
+### Design Review
+```
+/ui-design:design-review --file src/components/Button.tsx
+```
+
+### Create Component
+```
+/ui-design:create-component Card --platform react
+```
+
+### Accessibility Audit
+```
+/ui-design:accessibility-audit --level AA
+```
+
+### Design System Setup
+```
+/ui-design:design-system-setup --name "Acme Design System"
+```
+
+## Key Technologies Covered
+
+### Web
+- CSS Grid, Flexbox, Container Queries
+- Tailwind CSS, CSS-in-JS (Styled Components, Emotion)
+- React, Vue, Svelte component patterns
+- Framer Motion, GSAP animations
+
+### Mobile
+- **iOS**: SwiftUI, UIKit, Human Interface Guidelines
+- **Android**: Jetpack Compose, Material Design 3
+- **React Native**: StyleSheet, Reanimated, React Navigation
+
+### Design Systems
+- Design tokens (Style Dictionary, Figma Variables)
+- Component libraries (Storybook documentation)
+- Multi-brand theming
+
+### Accessibility
+- WCAG 2.2 AA/AAA compliance
+- ARIA patterns and semantic HTML
+- Screen reader compatibility
+- Keyboard navigation
+
+## Generated Artifacts
+
+The plugin creates artifacts in `.ui-design/`:
+
+```
+.ui-design/
+├── design-system.config.json    # Design system configuration
+├── component_specs/             # Generated component specifications
+├── audit_reports/               # Accessibility audit reports
+└── tokens/                      # Generated design tokens
+```
+
+## Requirements
+
+- Claude Code CLI
+- Node.js 18+ (for design token generation)
+
+## License
+
+MIT License