📚 Documentação inicial do ALETHEIA

- MANUAL-PRODUTO.md: Manual do usuário final
- MANUAL-VENDAS.md: Estratégia comercial e vendas
- MANUAL-TECNICO.md: Infraestrutura e deploy
- README.md: Visão geral do projeto

frontend/public/sw.js

@@ -0,0 +1,31 @@
+const CACHE_NAME = 'aletheia-v1';
+const STATIC_ASSETS = ['/', '/manifest.json', '/icons/icon-192.png', '/icons/icon-512.png'];
+
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => cache.addAll(STATIC_ASSETS))
+  );
+  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)))
+    )
+  );
+  self.clients.claim();
+});
+
+self.addEventListener('fetch', (event) => {
+  if (event.request.method !== 'GET') return;
+  event.respondWith(
+    fetch(event.request)
+      .then((response) => {
+        const clone = response.clone();
+        caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
+        return response;
+      })
+      .catch(() => caches.match(event.request))
+  );
+});