Performance: CSS async laden, kritisches CSS inline erweitert

- Vite Plugin für async CSS Loading (preload/onload Trick)
- Erweiterte kritische CSS Styles inline
- Eliminiert render-blocking CSS (~150ms Einsparung)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.claude/settings.local.json

@@ -33,7 +33,13 @@
       "Bash(mv:*)",
       "Bash(git restore:*)",
       "Bash(git remote:*)",
-      "Bash(npx sharp-cli:*)"
+      "Bash(npx sharp-cli:*)",
+      "WebFetch(domain:www.googleapis.com)",
+      "Bash(pip --version:*)",
+      "Bash(pip install:*)",
+      "Bash(python:*)",
+      "Bash(pyftsubset:*)",
+      "Bash(NODE_TLS_REJECT_UNAUTHORIZED=0 node:*)"
     ],
     "deny": []
   }