subpath bugfixes

src/pwa/sw.ts

@@ -18,7 +18,6 @@
 // In dev src/index.ts injects an empty list + "dev"; in production
 // scripts/build.ts injects the hashed dist asset list + a content hash.
 const PRECACHE: string[] = JSON.parse("__PRECACHE_MANIFEST__") as string[];
-const PRECACHE_URLS = PRECACHE.map(path => new URL(path, sw.location.href).pathname);
 const VERSION = "__CACHE_VERSION__";
 
 const SHELL_CACHE = `whisper-shell-${VERSION}`;
@@ -44,6 +43,7 @@ interface ServiceWorkerScope {
   addEventListener(type: "message", listener: (event: MessageEvent<unknown>) => void): void;
 }
 const sw = self as unknown as ServiceWorkerScope;
+const PRECACHE_URLS = PRECACHE.map(path => new URL(path, sw.location.href).pathname);
 
 sw.addEventListener("install", (event) => {
   event.waitUntil(