Add fullscreen PWA support

web/src/main.tsx

@@ -1,5 +1,8 @@
 import { render } from "preact";
 import { RootRouter } from "@/root-router";
+import { registerServiceWorker } from "@/pwa";
 import "./index.css";
 
+registerServiceWorker();
+
 render(<RootRouter />, document.getElementById("app")!);