feat: update worksmobile sync and restore planning

userfront/scripts/dev-server.sh

@@ -27,11 +27,71 @@ warm_get() {
     "http://127.0.0.1:${USERFRONT_INTERNAL_PORT}${path}" >/dev/null 2>&1
 }
 
+wait_for_userfront_build() {
+  flutter_pid="$1"
+  attempt=1
+
+  while [ "$attempt" -le "$USERFRONT_BOOT_WARMUP_ATTEMPTS" ]; do
+    if [ -f "build/web/index.html" ]; then
+      return 0
+    fi
+    if ! kill -0 "$flutter_pid" 2>/dev/null; then
+      echo "[userfront-boot] warmup skipped because flutter exited before build/web/index.html was ready" >&2
+      return 1
+    fi
+    attempt=$((attempt + 1))
+    sleep "$USERFRONT_BOOT_WARMUP_INTERVAL_SECONDS"
+  done
+
+  echo "[userfront-boot] warmup skipped after ${USERFRONT_BOOT_WARMUP_ATTEMPTS} build readiness attempts" >&2
+  return 1
+}
+
+reset_userfront_service_worker() {
+  cat > build/web/flutter_service_worker.js <<'EOF'
+self.addEventListener("install", (event) => {
+  self.skipWaiting();
+});
+
+self.addEventListener("activate", (event) => {
+  event.waitUntil(
+    (async () => {
+      if (self.caches) {
+        const keys = await self.caches.keys();
+        await Promise.all(
+          keys
+            .filter(
+              (key) =>
+                key.indexOf("baron-userfront-") === 0 ||
+                key.indexOf("flutter-app-cache") === 0,
+            )
+            .map((key) => self.caches.delete(key)),
+        );
+      }
+
+      await self.registration.unregister();
+
+      const clients = await self.clients.matchAll({
+        type: "window",
+        includeUncontrolled: true,
+      });
+      await Promise.all(clients.map((client) => client.navigate(client.url)));
+    })(),
+  );
+});
+EOF
+}
+
 warm_userfront_once() {
   flutter_pid="$1"
   attempt=1
   started_at="$(date +%s)"
 
+  if ! wait_for_userfront_build "$flutter_pid"; then
+    return 0
+  fi
+  reset_userfront_service_worker
+
   while [ "$attempt" -le "$USERFRONT_BOOT_WARMUP_ATTEMPTS" ]; do
     if wget -qO- "http://127.0.0.1:${USERFRONT_INTERNAL_PORT}/flutter_bootstrap.js" >/dev/null 2>&1; then
       break