fix(sqlite,browser): resolve SQLite connection pool deadlock, disable stale SW cache, and update BRAIN.md

frontend/public/sw.js

@@ -1,33 +1,18 @@
-const CACHE_NAME = 'mindsift-pwa-v1';
-const ASSETS = ['/', '/index.html', '/manifest.json'];
-
-self.addEventListener('install', (event) => {
-  event.waitUntil(
-    caches.open(CACHE_NAME).then((cache) => cache.addAll(ASSETS))
-  );
+// Network-first / cache-clearing service worker to ensure fresh builds across all browsers
+self.addEventListener('install', () => {
   self.skipWaiting();
 });
 
 self.addEventListener('activate', (event) => {
   event.waitUntil(
-    caches.keys().then((keys) =>
-      Promise.all(keys.filter((k) => k !== CACHE_NAME).map((k) => caches.delete(k)))
-    )
+    caches
+      .keys()
+      .then((keys) => Promise.all(keys.map((k) => caches.delete(k))))
+      .then(() => self.clients.claim())
   );
-  self.clients.claim();
 });
 
-self.addEventListener('fetch', (event) => {
-  if (event.request.method !== 'GET' || event.request.url.includes('/api/')) {
-    return;
-  }
-  event.respondWith(
-    fetch(event.request)
-      .then((res) => {
-        const clone = res.clone();
-        caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
-        return res;
-      })
-      .catch(() => caches.match(event.request).then((cached) => cached || caches.match('/')))
-  );
+self.addEventListener('fetch', () => {
+  // Always use native browser network fetch so API calls and fresh Vite bundles are never intercepted by stale caches
+  return;
 });