Add web push notifications for new inbox items

web/dist/app.js

@@ -53,6 +53,12 @@ async function main() {
     });
     addEventListener("hashchange", route);
     route();
+    if ("serviceWorker" in navigator) {
+        navigator.serviceWorker.onmessage = (e) => {
+            location.hash = new URL(e.data.open, location.origin).hash;
+        };
+        await navigator.serviceWorker.register("/sw.js");
+    }
 }
 main().catch((err) => {
     replace(document.body, h("pre", { class: "fatal" }, `byre failed to start: ${errorText(err)}`));