Grotti 3.0.0: Aufträge, Wartung, SSE, Ausschuss-Dialog, UI-Umbau.

Migrationen 003–009, Kundaufträge mit Lieferschein, Abräumen mit Urteil,
ntfy/Backup/Zeitfenster, Live-Stream und Mobile-Mehr-Menü.

web/static/sw.js

@@ -0,0 +1,27 @@
+/* Minimaler Service-Worker: App-Shell-Cache für Offline-Hinweis. */
+const CACHE = "grotti-shell-v1";
+const SHELL = ["/", "/static/grotti.css?v=54", "/static/api.js?v=28", "/static/ui.js?v=2"];
+
+self.addEventListener("install", (event) => {
+  event.waitUntil(caches.open(CACHE).then((c) => c.addAll(SHELL).catch(() => undefined)));
+  self.skipWaiting();
+});
+
+self.addEventListener("activate", (event) => {
+  event.waitUntil(
+    caches.keys().then((keys) =>
+      Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k)))
+    )
+  );
+  self.clients.claim();
+});
+
+self.addEventListener("fetch", (event) => {
+  const req = event.request;
+  if (req.method !== "GET") return;
+  const url = new URL(req.url);
+  if (url.pathname.startsWith("/api/")) return;
+  event.respondWith(
+    fetch(req).catch(() => caches.match(req).then((hit) => hit || caches.match("/")))
+  );
+});