refactor: Reduce duplication in brainstorming system

- Create brainstorming-framework.md to centralize common techniques and execution modes
- Simplify conceptual-planning-agent.md from 280 to 170 lines (39% reduction)
- Update all 9 brainstorm commands to reference framework instead of agent
- Eliminate circular dependencies and improve maintainability

Key improvements:
- Separated concerns: principles -> framework -> commands -> agent
- Role definitions now only exist in their respective command files
- Creative techniques centralized in framework file
- Agent focused solely on execution logic
- Clear hierarchical reference structure without duplication

🤖 Generated with Claude Code

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

.claude/commands/workflow/brainstorm/business-analyst.md

@@ -36,7 +36,7 @@ Business process expert responsible for analyzing workflows, identifying require
 ## 🧠 **Analysis Framework**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### Key Analysis Questions
 

.claude/commands/workflow/brainstorm/data-architect.md

@@ -36,7 +36,7 @@ Strategic data professional responsible for designing scalable, efficient data a
 ## 🧠 **Analysis Framework**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### Key Analysis Questions
 

.claude/commands/workflow/brainstorm/feature-planner.md

@@ -27,7 +27,7 @@ allowed-tools: Task(conceptual-planning-agent), TodoWrite(*)
 ## 🧠 **分析框架**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### 核心分析问题
 1. **功能需求分析**:

.claude/commands/workflow/brainstorm/innovation-lead.md

@@ -24,10 +24,10 @@ allowed-tools: Task(conceptual-planning-agent), TodoWrite(*)
 - **创新机会**: 破坏性创新、蓝海市场、技术融合机会
 - **未来愿景**: 长期技术路线图、概念验证、原型开发
 
-## 🧠 **分析框架**
+## 🧠 **Analysis Framework**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### 核心分析问题
 1. **技术趋势和机会**:

.claude/commands/workflow/brainstorm/product-manager.md

@@ -36,7 +36,7 @@ Strategic product leader focused on maximizing user value and business impact th
 ## 🧠 **Analysis Framework**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### Key Analysis Questions
 

.claude/commands/workflow/brainstorm/security-expert.md

@@ -36,7 +36,7 @@ Cybersecurity specialist focused on identifying threats, designing security cont
 ## 🧠 **Analysis Framework**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### Key Analysis Questions
 

.claude/commands/workflow/brainstorm/system-architect.md

@@ -36,7 +36,7 @@ Technical leader responsible for designing scalable, maintainable, and high-perf
 ## 🧠 **Analysis Framework**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### Key Analysis Questions
 

.claude/commands/workflow/brainstorm/ui-designer.md

@@ -36,7 +36,7 @@ Creative professional responsible for designing intuitive, accessible, and visua
 ## 🧠 **Analysis Framework**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### Key Analysis Questions
 

.claude/commands/workflow/brainstorm/user-researcher.md

@@ -27,7 +27,7 @@ allowed-tools: Task(conceptual-planning-agent), TodoWrite(*)
 ## 🧠 **分析框架**
 
 @~/.claude/workflows/brainstorming-principles.md
-@~/.claude/workflows/conceptual-planning-agent.md
+@~/.claude/workflows/brainstorming-framework.md
 
 ### 核心分析问题
 1. **用户理解和洞察**: