修复：更新离线缓存与登录导航策略

serviceworker.js

@@ -1,22 +1,20 @@
-var staticCacheName = "pwa-v" + new Date().getTime();
+var staticCacheName = "pwa-v2";
 var filesToCache = [
-    'public/img/pwa/icon-192x192.png',
-    'public/img/pwa/icon-512x512.png'
+    '/public/img/pwa/icon-192x192.png',
+    '/public/img/pwa/icon-512x512.png'
 ];
 
-/*
 // Cache on install
 self.addEventListener("install", event => {
-    this.skipWaiting();
     event.waitUntil(
         caches.open(staticCacheName)
             .then(cache => {
                 return cache.addAll(filesToCache);
             })
+            .then(() => self.skipWaiting())
     )
 });
-*/
-/*
+
 // Clear cache on activate
 self.addEventListener('activate', event => {
     event.waitUntil(
@@ -27,19 +25,29 @@ self.addEventListener('activate', event => {
                     .filter(cacheName => (cacheName !== staticCacheName))
                     .map(cacheName => caches.delete(cacheName))
             );
-        })
+        }).then(() => self.clients.claim())
     );
-});*/
+});
 
-// Serve from Cache
+// Navigation must prefer the network so cached redirects cannot mask auth state.
 self.addEventListener("fetch", event => {
+    if (event.request.method !== 'GET') {
+        return;
+    }
+
+    if (event.request.mode === 'navigate') {
+        event.respondWith(
+            fetch(event.request)
+                .catch(() => caches.match(event.request))
+        );
+
+        return;
+    }
+
     event.respondWith(
         caches.match(event.request)
             .then(response => {
                 return response || fetch(event.request);
             })
-            .catch(() => {
-                return caches.match('offline');
-            })
     )
 });