Merge commit 'd803bfe2b1fe7f5e219e50ac20d6801a0a58ac75' as 'vendor/ruvector'

vendor/ruvector/examples/pwa-loader/sw.js

@@ -0,0 +1,77 @@
+/**
+ * RVF Seed Decoder - Service Worker
+ *
+ * Cache-first strategy for static assets and the WASM binary.
+ * Falls back to network on cache miss, then caches the response.
+ */
+
+const CACHE_NAME = 'rvf-pwa-v1';
+
+const STATIC_ASSETS = [
+  './',
+  './index.html',
+  './app.js',
+  './style.css',
+  './manifest.json',
+];
+
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => {
+      return cache.addAll(STATIC_ASSETS);
+    })
+  );
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((names) => {
+      return Promise.all(
+        names
+          .filter((name) => name !== CACHE_NAME)
+          .map((name) => caches.delete(name))
+      );
+    })
+  );
+  self.clients.claim();
+});
+
+self.addEventListener('fetch', (event) => {
+  const url = new URL(event.request.url);
+
+  // Cache-first for same-origin static assets and WASM binaries
+  if (url.origin === self.location.origin) {
+    event.respondWith(
+      caches.open(CACHE_NAME).then((cache) => {
+        return cache.match(event.request).then((cached) => {
+          if (cached) {
+            return cached;
+          }
+          return fetch(event.request).then((response) => {
+            // Cache successful GET responses
+            if (response.ok && event.request.method === 'GET') {
+              const isWasm = url.pathname.endsWith('.wasm');
+              const isStatic =
+                url.pathname.endsWith('.html') ||
+                url.pathname.endsWith('.js') ||
+                url.pathname.endsWith('.css') ||
+                url.pathname.endsWith('.json');
+
+              if (isWasm || isStatic) {
+                cache.put(event.request, response.clone());
+              }
+            }
+            return response;
+          });
+        });
+      }).catch(() => {
+        // Offline fallback: return cached index for navigation requests
+        if (event.request.mode === 'navigate') {
+          return caches.match('./index.html');
+        }
+        return new Response('Offline', { status: 503 });
+      })
+    );
+  }
+});