fix(sw): 延迟注册Service Worker以提升页面稳定性

- 在页面加载完成后延迟3秒再注册Service Worker
- 避免Service Worker注册影响页面初始渲染性能
- 确保页面资源加载完成后再进行Service Worker初始化

index.html

@@ -421,13 +421,15 @@
 <script>
     if ('serviceWorker' in navigator) {
         window.addEventListener('load', function () {
-            navigator.serviceWorker.register('./js/sw.js')
-                .then(function (registration) {
-                    console.log('SW registered: ', registration);
-                })
-                .catch(function (registrationError) {
-                    console.log('SW registration failed: ', registrationError);
-                });
+            setTimeout(() => {
+                navigator.serviceWorker.register('./js/sw.js')
+                    .then(function(registration) {
+                        console.log('SW registered: ', registration);
+                    })
+                    .catch(function(registrationError) {
+                        console.log('SW registration failed: ', registrationError);
+                    });
+            }, 3000); // 页面稳定后再注册
         });
     }
 </script>