docs: sync README, CLAUDE.md, AGENTS.md with latest skill changes

- Add 93-tui-designer to all doc files and directory layouts
- Remove phantom 42-jamie-journal-editor (directory never existed)
- Update GTM directory names: 61-gtm-manager → 61-gtm-editor,
  62-gtm-guardian → 62-gtm-validator in CLAUDE.md layout
- Fix skill count: README 64→62, AGENTS.md 52→62
- Add .claude/commands/ slash command definitions
- Add SEO comprehensive audit gotcha notes (JHR, SLA)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/commands/seo-on-page-audit.md

@@ -0,0 +1,40 @@
+---
+description: On-page SEO analyzer for meta tags, headings, links, images, and Open Graph
+---
+
+# SEO On-Page Audit
+
+Single-page optimization analysis: meta tags, heading structure, links, images, OG data.
+
+## Triggers
+- "on-page SEO", "meta tags"
+- "heading analysis", "page SEO check"
+
+## Quick Start
+
+```bash
+python scripts/page_analyzer.py --url https://example.com
+python scripts/page_analyzer.py --url https://example.com --json
+python scripts/page_analyzer.py --urls urls.txt
+```
+
+## Analysis Categories
+- **Meta Tags**: Title (length, keywords), description, canonical, robots
+- **Heading Structure**: H1 presence/count, hierarchy validation, keyword placement
+- **Links**: Internal/external count, broken links, nofollow distribution
+- **Images**: Alt attributes, file sizes, lazy loading
+- **Open Graph**: OG title/description/image, Twitter Cards
+
+## Common Issues
+
+| Issue | Severity |
+|-------|----------|
+| Missing H1 | High |
+| Title too long (>60) | Medium |
+| No meta description | High |
+| Images without alt | Medium |
+| Multiple H1 tags | Medium |
+
+## Notion Output
+- Database: `2c8581e5-8a1e-8035-880b-e38cefc2f3ef`
+- Korean report, Audit ID: [TYPE]-YYYYMMDD-NNN