bunch of fixes for PWA, set up web push notifications, add buttons to remove service workers, add settings menu, let settings manage keys, permissions, and service worker registration

src/utils/store.ts

@@ -1,6 +1,13 @@
 import { signal } from "uhtml/preactive";
 import { Route } from "../router";
 
+export const API_BASE_URL = new URL(
+  import.meta.env.VITE_API_BASE_URL || "http://localhost:3000"
+);
+export const BASE_URL = new URL(
+  import.meta.env.VITE_BASE_URL || "http://localhost:3000"
+);
+
 // the current page / params for this URL
 export const page = signal(Route.Receive);
 export const params = signal(
@@ -12,3 +19,5 @@ export enum LOCAL_STORAGE_KEYS {
   ECDH_PUBLIC_KEY = "ecdhPublic",
   ECDH_PRIVATE_KEY = "ecdhPrivate",
 }
+
+export const hasServiceWorkers = signal(false);