Performance: Preload für Haupt-Script mit fetchpriority=high

- Entry-Script wird mit hoher Priorität vorgeladen
- Schnellerer JavaScript-Download und Ausführung

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

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

vite.config.ts

@@ -22,6 +22,13 @@ function asyncCssPlugin(): Plugin {
       html = html.replace(/<link rel="modulepreload" crossorigin href="\/assets\/js\/animations[^"]*\.js">\n?/g, '');
       html = html.replace(/<link rel="modulepreload" crossorigin href="\/assets\/js\/icons[^"]*\.js">\n?/g, '');
 
+      // Add high priority preload for entry script
+      const mainScriptMatch = html.match(/<script type="module" crossorigin src="(\/assets\/js\/index-[^"]+\.js)">/);
+      if (mainScriptMatch) {
+        const preloadScript = `<link rel="preload" href="${mainScriptMatch[1]}" as="script" crossorigin fetchpriority="high">\n`;
+        html = html.replace('</title>', '</title>\n  ' + preloadScript);
+      }
+
       return html;
     }
   };