integration: add site/sw.js

site/sw.js

@@ -0,0 +1,45 @@
+/* Sovereign site service worker — app-shell cache for the PWA.
+ * Cache-first for the static shell; network-first for API calls. */
+const CACHE = 'sovereign-v1';
+const SHELL = [
+  './',
+  'index.html',
+  'dashboard.html',
+  'chat.html',
+  'pec5d.html',
+  'kyrexis.html',
+  'coldcase.html',
+  'manifest.webmanifest'
+];
+
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE).then((cache) => cache.addAll(SHELL)).then(() => self.skipWaiting())
+  );
+});
+
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((keys) =>
+      Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k)))
+    ).then(() => self.clients.claim())
+  );
+});
+
+self.addEventListener('fetch', (event) => {
+  const url = new URL(event.request.url);
+  // API calls: network-first, no cache fallback (fresh data matters)
+  if (url.pathname.includes('/api/')) {
+    return;
+  }
+  event.respondWith(
+    caches.match(event.request).then((cached) => {
+      if (cached) return cached;
+      return fetch(event.request).then((response) => {
+        const clone = response.clone();
+        caches.open(CACHE).then((cache) => cache.put(event.request, clone));
+        return response;
+      });
+    })
+  );
+});