many many fixes

public/sw.js

@@ -39,6 +39,9 @@ self.addEventListener('fetch', event => {
   // Only handle GET requests
   if (request.method !== 'GET') return;
 
+  // Version checks must always hit the network (never cached)
+  if (url.origin === location.origin && url.pathname === '/version.json') return;
+
   // Handle HTML navigation requests (Offline support)
   if (request.mode === 'navigate') {
     event.respondWith(