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/globals.css

@@ -104,4 +104,19 @@ mark {
     -webkit-tap-highlight-color: transparent;
     user-select: none;
   }
+  
+  /* Remove 300ms click delay on iOS Safari */
+  a, button, input, select, textarea {
+    touch-action: manipulation;
+  }
+  
+  /* Optimize for touch interactions */
+  * {
+    -webkit-touch-callout: none;
+  }
+  
+  /* Prevent double-tap zoom on interactive elements */
+  button, a, input[type="button"], input[type="submit"] {
+    touch-action: manipulation;
+  }
 }