Add SEO skills 33-34 and fix bugs in skills 19-34

New skills:
- Skill 33: Site migration planner with redirect mapping and monitoring
- Skill 34: Reporting dashboard with HTML charts and Korean executive reports

Bug fixes (Skill 34 - report_aggregator.py):
- Add audit_type fallback for skill identification (was only using audit_id prefix)
- Extract health scores from nested data dict (technical_score, onpage_score, etc.)
- Support subdomain matching in domain filter (blog.ourdigital.org matches ourdigital.org)
- Skip self-referencing DASH- aggregated reports

Bug fixes (Skill 20 - naver_serp_analyzer.py):
- Remove VIEW tab selectors (removed by Naver in 2026)
- Add new section detectors: books (도서), shortform (숏폼), influencer (인플루언서)

Improvements (Skill 34 - dashboard/executive report):
- Add Korean category labels for Chart.js charts (기술 SEO, 온페이지, etc.)
- Add Korean trend labels (개선 중 ↑, 안정 →, 하락 중 ↓)
- Add English→Korean issue description translation layer (20 common patterns)

Documentation improvements:
- Add Korean triggers to 4 skill descriptions (19, 25, 28, 31)
- Expand Skill 32 SKILL.md from 40→143 lines (was 6/10, added workflow, output format, limitations)
- Add output format examples to Skills 27 and 28 SKILL.md
- Add limitations sections to Skills 27 and 28
- Update README.md, CLAUDE.md, AGENTS.md for skills 33-34

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom-skills/33-seo-migration-planner/code/commands/seo-migration-planner.md

@@ -0,0 +1,27 @@
+---
+name: seo-migration-planner
+description: |
+  SEO site migration planning and monitoring. Pre-migration risk assessment, redirect mapping,
+  crawl baseline, and post-migration traffic/indexation monitoring.
+  Triggers: site migration, domain move, redirect mapping, platform migration, URL restructuring, 사이트 이전.
+allowed-tools:
+  - Bash
+  - Read
+  - Write
+  - WebFetch
+  - WebSearch
+---
+
+# SEO Migration Planner
+
+Run the migration planning or monitoring workflow based on the user's request.
+
+## Pre-Migration Planning
+```bash
+python custom-skills/33-seo-migration-planner/code/scripts/migration_planner.py --domain [URL] --type [TYPE] --json
+```
+
+## Post-Migration Monitoring
+```bash
+python custom-skills/33-seo-migration-planner/code/scripts/migration_monitor.py --domain [URL] --migration-date [DATE] --json
+```