diff --git a/.tmp/imgdiff/old/sw.js b/.tmp/imgdiff/new/sw.js
index 22c715d..664dffd 100644
--- a/.tmp/imgdiff/old/sw.js
+++ b/.tmp/imgdiff/new/sw.js
@@ -1,123 +1,19 @@
 'use strict';
 
-const CACHE = 'weather-v4';
-
-// App shell ΓÇö cached on install for offline use
-const PRECACHE = [
-  '/',
-  '/app.js?v=4',
-  '/style.css?v=4',
-  '/manifest.json',
-  '/icons/icon.svg'
-];
-
+// Disable offline caching so UI updates are always immediate.
 self.addEventListener('install', event => {
-  event.waitUntil(
-    caches.open(CACHE)
-      .then(cache => cache.addAll(PRECACHE))
-      .then(() => self.skipWaiting())
-  );
+  event.waitUntil(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 { request } = event;
-  const url = new URL(request.url);
-
-  // Skip non-GET, API calls, and map/radar tile requests
-  if (
-    request.method !== 'GET' ||
-    url.pathname.startsWith('/api/') ||
-    url.hostname.includes('rainviewer') ||
-    url.hostname.includes('openstreetmap') ||
-    url.hostname.includes('cartodb') ||
-    url.hostname.includes('basemaps')
-  ) {
-    return;
-  }
-
-  const isAppShellRequest =
-    request.mode === 'navigate' ||
-    request.destination === 'document' ||
-    request.destination === 'script' ||
-    request.destination === 'style';
-
-  // Prefer fresh app shell assets so UI updates are visible immediately.
-  if (isAppShellRequest) {
-    event.respondWith(
-      fetch(request)
-        .then(response => {
-          if (response.ok) {
-            const clone = response.clone();
-            caches.open(CACHE).then(cache => cache.put(request, clone));
-          }
-          return response;
-        })
-        .catch(() => caches.match(request).then(cached => cached || caches.match('/')))
-    );
-    return;
-  }
-
-  event.respondWith(
-    caches.match(request).then(cached => {
-      if (cached) return cached;
-      return fetch(request).then(response => {
-        // Only cache successful same-origin and trusted CDN responses
-        if (response.ok && (
-          url.origin === self.location.origin ||
-          url.hostname.includes('googleapis') ||
-          url.hostname.includes('gstatic') ||
-          url.hostname.includes('unpkg.com')
-        )) {
-          const clone = response.clone();
-          caches.open(CACHE).then(cache => cache.put(request, clone));
-        }
-        return response;
-      });
-    })
-  );
-});
-
-self.addEventListener('push', event => {
-  let payload = { title: 'Weather alert', body: 'New weather update available.', url: '/' };
-  try {
-    const data = event.data ? event.data.json() : null;
-    if (data) payload = { ...payload, ...data };
-  } catch {
-    // Ignore malformed payload and use defaults.
-  }
-
-  event.waitUntil(
-    self.registration.showNotification(payload.title, {
-      body: payload.body,
-      icon: '/icons/icon.svg',
-      badge: '/icons/icon.svg',
-      data: { url: payload.url || '/' },
-    })
-  );
+  event.waitUntil((async () => {
+    const keys = await caches.keys();
+    await Promise.all(keys.map(k => caches.delete(k)));
+    await self.clients.claim();
+    await self.registration.unregister();
+  })());
 });
 
-self.addEventListener('notificationclick', event => {
-  event.notification.close();
-  const target = event.notification?.data?.url || '/';
-  event.waitUntil(
-    clients.matchAll({ type: 'window', includeUncontrolled: true }).then(windowClients => {
-      const existing = windowClients.find(c => c.url.includes(self.location.origin));
-      if (existing) {
-        existing.focus();
-        existing.navigate(target);
-        return;
-      }
-      return clients.openWindow(target);
-    })
-  );
-});
+self.addEventListener('fetch', () => {
+  // Intentionally no fetch interception.
+});
\ No newline at end of file