fix: purge stale 1-tap mobile pins, make remove pin button bold and prominent, and bust service worker cache

sw.js

@@ -1,35 +1,53 @@
-// Service Worker for FlockRadar Offline Driving & Caching
-const CACHE_NAME = 'flockradar-v2';
+// Service Worker for FlockRadar Offline Driving & Live Updates
+const CACHE_NAME = 'flockradar-v6';
 const ASSETS_TO_CACHE = [
   './',
   './index.html',
-  './css/styles.css',
-  './js/app.js',
-  './js/auth.js',
-  './js/radar.js',
-  './data/portals.js',
+  './css/styles.css?v=6',
+  './js/app.js?v=6',
+  './js/auth.js?v=6',
+  './js/radar.js?v=6',
+  './data/portals.js?v=6',
   './manifest.json'
 ];
 
 self.addEventListener('install', event => {
+  self.skipWaiting();
   event.waitUntil(
     caches.open(CACHE_NAME).then(cache => cache.addAll(ASSETS_TO_CACHE))
   );
-  self.skipWaiting();
 });
 
 self.addEventListener('activate', event => {
   event.waitUntil(
     caches.keys().then(keys => Promise.all(
       keys.filter(key => key !== CACHE_NAME).map(key => caches.delete(key))
-    ))
+    )).then(() => self.clients.claim())
   );
-  self.clients.claim();
 });
 
 self.addEventListener('fetch', event => {
-  // Network first, fallback to cache
+  // Always network-first for HTML, JS and CSS to ensure instant updates
+  const url = new URL(event.request.url);
+  if (url.origin === self.location.origin) {
+    event.respondWith(
+      fetch(event.request, { cache: 'no-cache' })
+        .then(response => {
+          if (response && response.status === 200) {
+            const clone = response.clone();
+            caches.open(CACHE_NAME).then(cache => cache.put(event.request, clone));
+          }
+          return response;
+        })
+        .catch(() => caches.match(event.request))
+    );
+    return;
+  }
+
+  // Fallback for CDN resources (Leaflet tiles etc)
   event.respondWith(
-    fetch(event.request).catch(() => caches.match(event.request))
+    caches.match(event.request).then(cached => {
+      return cached || fetch(event.request);
+    })
   );
 });