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-core-web-vitals.md

@@ -0,0 +1,45 @@
+---
+description: Core Web Vitals analyzer using PageSpeed Insights API (LCP, CLS, INP, FID)
+---
+
+# SEO Core Web Vitals
+
+PageSpeed Insights API client for CWV measurement and recommendations.
+
+## Triggers
+- "Core Web Vitals", "page speed"
+- "LCP", "CLS", "INP", "performance audit"
+
+## Quick Start
+
+```bash
+export PAGESPEED_API_KEY=your_api_key
+python scripts/pagespeed_client.py --url https://example.com
+python scripts/pagespeed_client.py --url https://example.com --strategy both
+python scripts/pagespeed_client.py --urls urls.txt --output results.json
+```
+
+## CWV Thresholds
+
+| Metric | Good | Poor |
+|--------|------|------|
+| LCP | <=2.5s | >4s |
+| FID | <=100ms | >300ms |
+| CLS | <=0.1 | >0.25 |
+| INP | <=200ms | >500ms |
+
+## Common Fixes
+
+| Issue | Fix |
+|-------|-----|
+| Large LCP | Optimize images, preload critical resources |
+| High CLS | Set image dimensions, avoid injected content |
+| Poor INP | Reduce JavaScript, optimize event handlers |
+| Slow TTFB | Improve server response, use CDN |
+
+## Rate Limits
+- No API key: 25/day; With key: 25,000/day
+
+## Notion Output
+- Database: `2c8581e5-8a1e-8035-880b-e38cefc2f3ef`
+- Korean report, Audit ID: [TYPE]-YYYYMMDD-NNN