feat(skills): add CCW orchestrator and refactor command-guide to ccw-help

CCW Skill (new):
- Stateless workflow orchestrator with intent classification
- 6 workflow combinations: rapid, full, coupled, bugfix, issue, ui
- External configuration: intent-rules.json, workflow-chains.json
- Implicit CLI tool injection (Gemini/Qwen/Codex)
- TODO tracking integration for workflow progress

CCW-Help Skill (refactored from command-guide):
- Renamed command-guide → ccw-help
- Removed reference folder duplication
- Source paths now relative from index/ (../../../commands/...)
- Added all-agents.json index
- Simplified SKILL.md following CCW pattern

.claude/skills/ccw/phases/actions/ui.md

@@ -0,0 +1,79 @@
+# UI Design Workflow Action
+
+## Pattern
+```
+ui-design:[explore|imitate]-auto → design-sync → plan → execute
+```
+
+## Trigger Conditions
+
+- 关键词: "ui", "界面", "design", "组件", "样式", "布局", "前端"
+- 变体触发:
+  - `imitate`: "参考", "模仿", "像", "类似"
+  - `explore`: 无特定参考时默认
+
+## Variants
+
+### Explore (探索式设计)
+```mermaid
+graph TD
+    A[User Input] --> B[ui-design:explore-auto]
+    B --> C[设计系统分析]
+    C --> D[组件结构规划]
+    D --> E[design-sync]
+    E --> F[plan]
+    F --> G[execute]
+```
+
+### Imitate (参考式设计)
+```mermaid
+graph TD
+    A[User Input + Reference] --> B[ui-design:imitate-auto]
+    B --> C[参考分析]
+    C --> D[风格提取]
+    D --> E[design-sync]
+    E --> F[plan]
+    F --> G[execute]
+```
+
+## Configuration
+
+| 参数 | 默认值 | 说明 |
+|------|--------|------|
+| design_system | auto | 设计系统(auto/tailwind/mui/custom) |
+| responsive | true | 响应式设计 |
+| accessibility | true | 无障碍支持 |
+
+## CLI Integration
+
+| 阶段 | CLI Hint | 用途 |
+|------|----------|------|
+| explore/imitate | `gemini --mode analysis` | 设计分析、风格提取 |
+| design-sync | - | 设计决策与代码库同步 |
+| plan | - | 内置规划 |
+| execute | `codex --mode write` | 组件实现 |
+
+## Slash Commands
+
+```bash
+/workflow:ui-design:explore-auto   # 探索式UI设计
+/workflow:ui-design:imitate-auto   # 参考式UI设计
+/workflow:ui-design:design-sync    # 设计与代码同步（关键步骤）
+/workflow:ui-design:style-extract  # 提取现有样式
+/workflow:ui-design:codify-style   # 样式代码化
+```
+
+## When to Use
+
+- 新页面/组件开发
+- UI重构或现代化
+- 设计系统建立
+- 参考其他产品设计
+
+## Risk Assessment
+
+| 风险 | 缓解措施 |
+|------|----------|
+| 设计不一致 | style-extract确保复用 |
+| 响应式问题 | 多断点验证 |
+| 可访问性缺失 | a11y检查集成 |