feat: enhance workflow planning with concept clarification and agent delegation

🎯 Major Enhancements:

1. Concept Clarification Quality Gate (concept-clarify.md)
   - Added dual-mode support: brainstorm & plan modes
   - Auto-detects mode based on artifact presence (ANALYSIS_RESULTS.md vs synthesis-specification.md)
   - Backward compatible with existing brainstorm workflow
   - Updates appropriate artifacts based on detected mode

2. Planning Workflow Enhancement (plan.md)
   - Added Phase 3.5: Concept Clarification as quality gate
   - Integrated Phase 3.5 between analysis and task generation
   - Enhanced with interactive Q&A to resolve ambiguities
   - Updated from 4-phase to 5-phase workflow model
   - Delegated Phase 3 (Intelligent Analysis) to cli-execution-agent
   - Autonomous context discovery and enhanced prompt generation

3. Documentation Updates (README.md, README_CN.md)
   - Added /workflow:test-cycle-execute command documentation
   - Explained dynamic task generation and iterative fix cycles
   - Included usage examples and key features
   - Updated both English and Chinese versions

🔧 Technical Details:
- concept-clarify now supports both ANALYSIS_RESULTS.md (plan) and synthesis-specification.md (brainstorm)
- plan.md Phase 3 now uses cli-execution-agent for MCP-powered context discovery
- Maintains auto-continue mechanism with one interactive quality gate (Phase 3.5)
- All changes preserve backward compatibility

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README_CN.md

@@ -400,13 +400,23 @@ cd .workflow/WFS-auth/.design/prototypes && python -m http.server 8080
 **阶段 5：测试与质量保证**
 ```bash
 # 生成独立测试修复工作流（v3.2.2+）
-/workflow:test-gen WFS-auth  # 创建 WFS-test-auth 会话
-/workflow:execute            # 运行测试验证
+/workflow:test-gen WFS-auth          # 创建 WFS-test-auth 会话
+/workflow:test-cycle-execute         # 执行测试修复循环，包含动态迭代
+
+# 恢复中断的测试会话
+/workflow:test-cycle-execute --resume-session="WFS-test-auth"
 
 # 或验证 TDD 合规性（TDD 工作流）
 /workflow:tdd-verify
 ```
 
+**什么是 `/workflow:test-cycle-execute`？**
+- **动态任务生成**：基于测试失败在执行过程中创建中间修复任务
+- **迭代测试**：自动运行测试修复循环，直到所有测试通过或达到最大迭代次数
+- **CLI 驱动分析**：使用 Gemini/Qwen 分析失败并生成修复策略
+- **智能体协调**：将测试执行和修复委托给 `@test-fix-agent`
+- **自主完成**：持续直到成功，无需用户干预
+
 ### 简单任务快速入门
 
 **功能开发：**
@@ -484,6 +494,7 @@ cd .workflow/WFS-auth/.design/prototypes && python -m http.server 8080
 | `/workflow:execute` | 自主执行当前的工作流计划。 |
 | `/workflow:status` | 显示工作流的当前状态。 |
 | `/workflow:test-gen [--use-codex] <session>` | 为已完成实现创建独立测试生成工作流，支持自动诊断和修复。 |
+| `/workflow:test-cycle-execute` | **v4.5.0** 执行测试修复工作流，包含动态任务生成和迭代修复循环。运行测试 → 使用 CLI 分析失败 → 生成修复任务 → 重新测试直至成功。 |
 | `/workflow:tdd-verify` | 验证 TDD 合规性并生成质量报告。 |
 | `/workflow:review` | **可选** 手动审查（仅在明确需要时使用，测试通过即代表代码已批准）。 |
 | `/workflow:tools:test-context-gather` | 分析测试覆盖率，识别缺失的测试文件。 |