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>

ourdigital-custom-skills/11-seo-on-page-audit/desktop/SKILL.md

@@ -0,0 +1,94 @@
+---
+name: seo-on-page-audit
+version: 1.0.0
+description: On-page SEO analyzer for meta tags, headings, links, images, and Open Graph. Triggers: on-page SEO, meta tags, title tag, heading structure, alt text.
+allowed-tools: mcp__firecrawl__*, mcp__perplexity__*, mcp__notion__*
+---
+
+# SEO On-Page Audit
+
+## Purpose
+
+Analyze single-page SEO elements: meta tags, heading hierarchy, internal/external links, images, and social sharing tags.
+
+## Core Capabilities
+
+1. **Meta Tags** - Title, description, canonical, robots
+2. **Headings** - H1-H6 structure and hierarchy
+3. **Links** - Internal, external, broken detection
+4. **Images** - Alt text, sizing, lazy loading
+5. **Social** - Open Graph, Twitter Cards
+
+## MCP Tool Usage
+
+```
+mcp__firecrawl__scrape: Extract page HTML and metadata
+mcp__perplexity__search: Research SEO best practices
+mcp__notion__create-page: Save audit findings
+```
+
+## Workflow
+
+1. Scrape target URL with Firecrawl
+2. Extract and analyze meta tags
+3. Map heading hierarchy
+4. Count and categorize links
+5. Check image optimization
+6. Validate Open Graph tags
+7. Generate recommendations
+
+## Checklist
+
+### Meta Tags
+- [ ] Title present (50-60 characters)
+- [ ] Meta description present (150-160 characters)
+- [ ] Canonical URL set
+- [ ] Robots meta allows indexing
+
+### Headings
+- [ ] Single H1 tag
+- [ ] Logical hierarchy (no skips)
+- [ ] Keywords in H1
+
+### Links
+- [ ] No broken internal links
+- [ ] External links use rel attributes
+- [ ] Reasonable internal link count
+
+### Images
+- [ ] All images have alt text
+- [ ] Images are appropriately sized
+- [ ] Lazy loading implemented
+
+### Open Graph
+- [ ] og:title present
+- [ ] og:description present
+- [ ] og:image present (1200x630)
+
+## Output Format
+
+```markdown
+## On-Page Audit: [URL]
+
+### Meta Tags: X/5
+| Element | Status | Value |
+|---------|--------|-------|
+
+### Headings: X/5
+- H1: [text]
+- Hierarchy: Valid/Invalid
+
+### Links
+- Internal: X
+- External: X
+- Broken: X
+
+### Recommendations
+1. [Priority fixes]
+```
+
+## Limitations
+
+- Single page analysis only
+- Cannot detect JavaScript-rendered content issues
+- External link status requires additional crawl