diff --git a/frontend/public/manifest-1.json b/frontend/public/manifest-1.json
new file mode 100644
index 0000000..0c8eb72
--- /dev/null
+++ b/frontend/public/manifest-1.json
@@ -0,0 +1,14 @@
+{
+  "name": "Dicken Dock",
+  "short_name": "DickenDock",
+  "description": "Dein modulares Tool-Dashboard",
+  "start_url": "/",
+  "display": "standalone",
+  "orientation": "portrait",
+  "background_color": "#0d0d0f",
+  "theme_color": "#0d0d0f",
+  "icons": [
+    { "src": "/icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any" },
+    { "src": "/icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any maskable" }
+  ]
+}
diff --git a/frontend/public/sw-1.js b/frontend/public/sw-1.js
new file mode 100644
index 0000000..7e549c7
--- /dev/null
+++ b/frontend/public/sw-1.js
@@ -0,0 +1,34 @@
+const CACHE = 'dickendock-v1';
+const ASSETS = ['/', '/index.html'];
+
+self.addEventListener('install', e => {
+  e.waitUntil(
+    caches.open(CACHE).then(c => c.addAll(ASSETS)).then(() => self.skipWaiting())
+  );
+});
+
+self.addEventListener('activate', e => {
+  e.waitUntil(
+    caches.keys().then(keys =>
+      Promise.all(keys.filter(k => k !== CACHE).map(k => caches.delete(k)))
+    ).then(() => self.clients.claim())
+  );
+});
+
+self.addEventListener('fetch', e => {
+  // API-Anfragen immer live holen
+  if (e.request.url.includes('/api/')) {
+    e.respondWith(fetch(e.request).catch(() => new Response('Offline', { status: 503 })));
+    return;
+  }
+  // Alles andere: Cache first, dann Network
+  e.respondWith(
+    caches.match(e.request).then(cached => {
+      const network = fetch(e.request).then(res => {
+        if (res.ok) caches.open(CACHE).then(c => c.put(e.request, res.clone()));
+        return res;
+      });
+      return cached || network;
+    })
+  );
+});