refactor(skills): Restructure skills to dual-platform architecture

Major refactoring of ourdigital-custom-skills with new numbering system:

## Structure Changes
- Each skill now has code/ (Claude Code) and desktop/ (Claude Desktop) versions
- New progressive numbering: 01-09 General, 10-19 SEO, 20-29 GTM, 30-39 OurDigital, 40-49 Jamie

## Skill Reorganization
- 01-notion-organizer (from 02)
- 10-18: SEO tools split into focused skills (technical, on-page, local, schema, vitals, gsc, gateway)
- 20-21: GTM audit and manager
- 30-32: OurDigital designer, research, presentation
- 40-41: Jamie brand editor and audit

## New Files
- .claude/commands/: Slash command definitions for all skills
- CLAUDE.md: Updated with new skill structure documentation
- REFACTORING_PLAN.md: Migration documentation
- COMPATIBILITY_REPORT.md, SKILLS_COMPARISON.md: Analysis docs

## Removed
- Old skill directories (02-05, 10-14, 20-21 old numbering)
- Consolidated into new structure with _archive/ for reference

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/commands/ourdigital-designer.md

@@ -0,0 +1,43 @@
+# OurDigital Designer
+
+Visual storytelling toolkit for blog featured images.
+
+## Triggers
+- "create image prompt", "블로그 이미지", "featured image"
+
+## Capabilities
+
+1. **Concept Extraction** - Extract visual themes from essay text
+2. **Prompt Generation** - Create AI image prompts
+3. **Mood Calibration** - Fine-tune emotional parameters
+4. **Style Consistency** - OurDigital brand visual language
+
+## Scripts
+
+```bash
+# Generate image prompt
+python ourdigital-custom-skills/30-ourdigital-designer/code/scripts/generate_prompt.py \
+  --topic "AI identity" --mood "contemplative"
+
+# From essay text
+python ourdigital-custom-skills/30-ourdigital-designer/code/scripts/generate_prompt.py \
+  --input essay.txt --auto-extract
+
+# Calibrate mood
+python ourdigital-custom-skills/30-ourdigital-designer/code/scripts/mood_calibrator.py \
+  --input "essay excerpt" --style "minimalist"
+```
+
+## Visual Style Guide
+
+| Essay Type | Strategy | Colors |
+|------------|----------|--------|
+| Technology | Organic-digital hybrids | Cool blues → warm accents |
+| Social | Network patterns | Desaturated → hope spots |
+| Philosophy | Zen space, symbols | Monochrome + single accent |
+
+## Output Format
+- 1200x630px (OG image standard)
+- Minimalist vector + subtle textures
+- 60-30-10 color rule
+- 20%+ negative space