Index: src/server.js
===================================================================
--- src/server.js	(revision f24b795df9de0065a2a1d1f073c8852baf612bc4)
+++ src/server.js	(revision 88788148df903019ffbc5b7d8b3dca7d1d759712)
@@ -470,5 +470,5 @@
   res.set('Cache-Control', 'no-cache');
   res.send(`
-const CACHE_VERSION = 'pcms-v16-' + new Date().toISOString().split('T')[0];
+const CACHE_VERSION = 'pcms-v17-' + new Date().toISOString().split('T')[0];
 self.addEventListener('install', e => {
   e.waitUntil(caches.open(CACHE_VERSION).then(c => c.addAll(['/'])));
@@ -495,5 +495,17 @@
   try { if (new URL(e.request.url).origin !== self.location.origin) return; } catch (err) { return; }
   e.respondWith(
-    fetch(e.request).catch(() => caches.match('/').then(r => r || Response.error()))
+    fetch(e.request).then(resp => {
+      // Network-first: always serve fresh when online. Also refresh the '/' offline
+      // fallback with the homepage we just served, so a later cold start on a flaky or
+      // offline connection no longer shows the stale install-time snapshot ("old data
+      // on first PWA load").
+      try {
+        if (resp && resp.ok && new URL(e.request.url).pathname === '/') {
+          const copy = resp.clone();
+          e.waitUntil(caches.open(CACHE_VERSION).then(c => c.put('/', copy)).catch(() => {}));
+        }
+      } catch (err) { /* ignore cache refresh failures */ }
+      return resp;
+    }).catch(() => caches.match('/').then(r => r || Response.error()))
   );
 });