refactor: Add tree-style execution flow diagrams to all workflow commands

Added tree-style execution process diagrams using ASCII art (├─, └─, │) to 34 workflow command files across three directories for improved readability and execution flow clarity.

## Changes by Directory

### workflow/ root (17 files)
- lite-plan.md, lite-execute.md, lite-fix.md
- plan.md, execute.md, replan.md
- status.md, review.md, review-fix.md
- review-session-cycle.md, review-module-cycle.md
- session commands (start, complete, resume, list)
- tdd-plan.md, tdd-verify.md, test-cycle-execute.md, test-gen.md, test-fix-gen.md

### workflow/ui-design/ (10 files)
- layout-extract.md, animation-extract.md, style-extract.md
- generate.md, import-from-code.md, codify-style.md
- imitate-auto.md, explore-auto.md
- reference-page-generator.md, design-sync.md

### workflow/tools/ (8 files)
- conflict-resolution.md, task-generate-agent.md, context-gather.md
- tdd-coverage-analysis.md, task-generate-tdd.md
- test-task-generate.md, test-concept-enhanced.md, test-context-gather.md

## Diagram Features
- Input parsing with flag enumeration
- Decision branching with conditional paths
- Phase/step hierarchy with clear nesting
- Mode detection and validation flows

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

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

.claude/commands/workflow/tools/test-concept-enhanced.md

@@ -24,6 +24,29 @@ Workflow coordinator that delegates test analysis to cli-execution-agent. Agent
 - Execute Gemini analysis via agent for test strategy generation
 - Validate agent outputs (gemini-test-analysis.md, TEST_ANALYSIS_RESULTS.md)
 
+## Execution Process
+
+```
+Input Parsing:
+   ├─ Parse flags: --session, --context
+   └─ Validation: Both REQUIRED
+
+Phase 1: Context Preparation (Command)
+   ├─ Load workflow-session.json
+   ├─ Verify test session type is "test-gen"
+   ├─ Validate test-context-package.json
+   └─ Determine strategy (Simple: 1-3 files | Medium: 4-6 | Complex: >6)
+
+Phase 2: Test Analysis Execution (Agent)
+   ├─ Execute Gemini analysis via cli-execution-agent
+   └─ Generate TEST_ANALYSIS_RESULTS.md
+
+Phase 3: Output Validation (Command)
+   ├─ Verify gemini-test-analysis.md exists
+   ├─ Validate TEST_ANALYSIS_RESULTS.md
+   └─ Confirm test requirements are actionable
+```
+
 ## Execution Lifecycle
 
 ### Phase 1: Context Preparation (Command Responsibility)