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>

.gitignore

@@ -81,4 +81,7 @@ supabase/.temp/
 .history/
 
 # Source images (originals before optimization)
-source-images/
+source-images/
+
+# Auto Claude data directory
+.auto-claude/