Force PWA updates before push registration

server/server.js

@@ -469,7 +469,11 @@ const serveStatic = (req, res) => {
     '.json': 'application/json',
     '.webmanifest': 'application/manifest+json',
   }
-  res.writeHead(200, { 'Content-Type': types[ext] || 'application/octet-stream' })
+  const headers = { 'Content-Type': types[ext] || 'application/octet-stream' }
+  if (path.basename(safePath) === 'sw.js' || ext === '.html' || ext === '.webmanifest') {
+    headers['Cache-Control'] = 'no-store'
+  }
+  res.writeHead(200, headers)
   createReadStream(safePath).pipe(res)
 }
 

src/main.js

@@ -6,8 +6,17 @@ createApp(App).mount('#app')
 
 if ('serviceWorker' in navigator) {
   window.addEventListener('load', () => {
-    navigator.serviceWorker.register('/sw.js').catch((error) => {
+    navigator.serviceWorker.register('/sw.js', { updateViaCache: 'none' }).then((registration) => {
+      registration.update().catch(() => {})
+    }).catch((error) => {
       console.warn('Service worker registration failed:', error)
     })
   })
+
+  let refreshing = false
+  navigator.serviceWorker.addEventListener('controllerchange', () => {
+    if (refreshing) return
+    refreshing = true
+    window.location.reload()
+  })
 }

src/services/notifications.js

@@ -26,6 +26,9 @@ const explainSubscribeError = async (error) => {
   if (brave && /push service|registration failed|not available|permission/i.test(message)) {
     return 'Brave is blocking Web Push. In Brave settings, enable "Use Google services for push messaging", then fully close and reopen the installed L484 app.'
   }
+  if (/push service|registration failed|not available/i.test(message)) {
+    return 'The browser push service is unavailable. In Brave, enable "Use Google services for push messaging"; otherwise fully close and reopen the installed app, then try again.'
+  }
   return `Push registration failed: ${message}. Fully close and reopen the installed app, then try again.`
 }
 
@@ -77,7 +80,7 @@ export const subscribeToNotifications = async () => {
   permission.value = requested
   if (requested !== 'granted') throw new Error('Notification permission was not granted.')
 
-  const registered = await navigator.serviceWorker.register('/sw.js', { scope: '/' })
+  const registered = await navigator.serviceWorker.register('/sw.js', { scope: '/', updateViaCache: 'none' })
   await registered.update().catch(() => {})
   const readyRegistration = await navigator.serviceWorker.ready
   const existing = await readyRegistration.pushManager.getSubscription()