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/ui-design/imitate-auto.md

@@ -36,6 +36,50 @@ allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Write(*), Bash(*)
 
 **Task Attachment Model**: SlashCommand invocation is NOT delegation - it's task expansion. The orchestrator executes these attached tasks itself, not waiting for external completion.
 
+## Execution Process
+
+```
+Input Parsing:
+   ├─ Parse flags: --input, --session (legacy: --images, --prompt)
+   └─ Decision (input detection):
+      ├─ Contains * or glob matches → images_input (visual)
+      ├─ File/directory exists → code import source
+      └─ Pure text → design prompt
+
+Phase 0: Parameter Parsing & Input Detection
+   ├─ Step 1: Normalize parameters (legacy deprecation warning)
+   ├─ Step 2: Detect design source (hybrid | code_only | visual_only)
+   └─ Step 3: Initialize directories and metadata
+
+Phase 0.5: Code Import (Conditional)
+   └─ Decision (design_source):
+      ├─ hybrid → Execute /workflow:ui-design:import-from-code
+      └─ Other → Skip to Phase 2
+
+Phase 2: Style Extraction
+   └─ Decision (skip_style):
+      ├─ code_only AND style_complete → Use code import
+      └─ Otherwise → Execute /workflow:ui-design:style-extract
+
+Phase 2.3: Animation Extraction
+   └─ Decision (skip_animation):
+      ├─ code_only AND animation_complete → Use code import
+      └─ Otherwise → Execute /workflow:ui-design:animation-extract
+
+Phase 2.5: Layout Extraction
+   └─ Decision (skip_layout):
+      ├─ code_only AND layout_complete → Use code import
+      └─ Otherwise → Execute /workflow:ui-design:layout-extract
+
+Phase 3: UI Assembly
+   └─ Execute /workflow:ui-design:generate
+
+Phase 4: Design System Integration
+   └─ Decision (session_id):
+      ├─ Provided → Execute /workflow:ui-design:update
+      └─ Not provided → Standalone completion
+```
+
 ## Core Rules
 
 1. **Start Immediately**: TodoWrite initialization → Phase 2 execution