Fix Safari/iPhone performance issues - remove 300ms click delay

- Added touch-action: manipulation CSS to eliminate 300ms tap delay
- Optimized service worker to skip cross-origin requests
- Updated viewport settings to prevent iOS delays
- Added format-detection meta tag
- Enabled Next.js performance optimizations
- Created comprehensive performance fix documentation

app/layout.tsx

@@ -34,8 +34,8 @@ export const metadata: Metadata = {
 export const viewport: Viewport = {
   width: 'device-width',
   initialScale: 1,
-  maximumScale: 1,
-  userScalable: false,
+  maximumScale: 5,
+  userScalable: true,
   viewportFit: 'cover',
   themeColor: '#3B82F6',
 }
@@ -66,7 +66,8 @@ export default function RootLayout({
         <meta name="theme-color" content="#3B82F6" />
         <meta name="background-color" content="#ffffff" />
         
-        {/* iOS Splash Screens - Optional but recommended */}
+        {/* iOS Performance Optimizations */}
+        <meta name="format-detection" content="telephone=no" />
         <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
       </head>
       <body className="bg-gray-50 min-h-screen">