fix: preserve reconnect across deferred workspace startup

frontend/dashboard.js

@@ -7388,8 +7388,9 @@
   updateDeliveryReceiptControls();
   if (!navigator.onLine) await showOfflineStatus();
   window.addEventListener('offline', showOfflineStatus);
-  window.addEventListener('online', reconnectOutboxes);
-  workspaceLifecycle.replayOnline(reconnectOutboxes);
+  const reconnectAfterOnline = () => setTimeout(reconnectOutboxes, 500);
+  window.addEventListener('online', reconnectAfterOnline);
+  workspaceLifecycle.replayOnline(reconnectAfterOnline);
 
   qs('#refresh').addEventListener('click', load);
   qs('#plan-today').addEventListener('click', event => openPlanToday(event.currentTarget));

frontend/service-worker.js

@@ -383,6 +383,17 @@ async function warmOptionalFeature(cache, staleCacheNames, asset) {
   await cache.add(asset);
 }
 
+async function cachedOptionalFeature(request) {
+  const cached = await caches.match(request);
+  if (cached) return cached;
+  const response = await fetch(request);
+  if (response.ok) {
+    const cache = await caches.open(CACHE);
+    await cache.put(request, response.clone());
+  }
+  return response;
+}
+
 self.addEventListener('activate', event => {
   event.waitUntil((async () => {
     const keys = await caches.keys();
@@ -635,6 +646,6 @@ self.addEventListener('fetch', event => {
     return;
   }
   if (url.origin === self.location.origin && OPTIONAL_FEATURES.includes(url.pathname)) {
-    event.respondWith(caches.match(request).then(cached => cached || fetch(request)));
+    event.respondWith(cachedOptionalFeature(request));
   }
 });