auto-claude: subtask-2-4 - Verify PageSpeed scores and fix SEO issues

- Created PAGESPEED_VERIFICATION_REPORT.md with comprehensive audit results
- Fixed robots.txt conflict by removing static public/robots.txt
- Updated src/app/robots.ts to include language-specific sitemaps (de, en, sr)
- Local Lighthouse tests: Accessibility 92-100%, Best Practices 100%
- Performance/SEO verification requires manual testing via pagespeed.web.dev
- Added .auto-claude/ to .gitignore

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

public/robots.txt

@@ -1,17 +0,0 @@
-# Allow all crawlers
-User-agent: *
-Allow: /
-Crawl-delay: 1
-
-# Disallow admin or sensitive paths if any
-Disallow: /admin
-Disallow: /api/
-Disallow: /.env
-
-# Sitemap location
-Sitemap: https://damjan-savic.com/sitemap.xml
-
-# Language specific sitemaps
-Sitemap: https://damjan-savic.com/sitemap-de.xml
-Sitemap: https://damjan-savic.com/sitemap-en.xml
-Sitemap: https://damjan-savic.com/sitemap-sr.xml