feat: Enable React Compiler for automatic memoization

- Install babel-plugin-react-compiler@1.0.0
- Add reactCompiler: true to next.config.mjs
- React 19 compiler will auto-optimize useMemo/useCallback

next.config.mjs

@@ -5,6 +5,8 @@ const nextConfig = {
     output: 'standalone',
     // Enable source maps for Sentry stack traces in production
     productionBrowserSourceMaps: !!process.env.GLITCHTIP_DSN,
+    // React Compiler for automatic memoization (React 19+)
+    reactCompiler: true,
     experimental: {
         serverActions: {
             bodySizeLimit: '10mb',