set up service worker caching, fix perf issues with rerenders, split code into more modules, switch to a green theme, add modal for updating site via service worker

src/router.ts

@@ -0,0 +1,43 @@
+import { Hole } from "uhtml";
+import { RequestPage, generateRequestUrl } from "./routes/request.ts";
+import { SendPage } from "./routes/send.ts";
+import { ReceivePage, decryptData } from "./routes/receive.ts";
+import { NotFoundPage } from "./routes/notfound.ts";
+import { LOCAL_STORAGE_KEYS, page, params } from "./utils/store.ts";
+
+export enum Route {
+  Request = "request",
+  Send = "send",
+  Receive = "receive",
+}
+
+export const routeToPage = (toPage: Route): Hole => {
+  switch (toPage) {
+    case Route.Request:
+      return RequestPage();
+    case Route.Send:
+      return SendPage();
+    case Route.Receive:
+      return ReceivePage();
+    default:
+      return NotFoundPage;
+  }
+};
+
+export const hashChange = () => {
+  const updatedParams = new URLSearchParams(window.location.hash.slice(1));
+  params.value = updatedParams;
+  const p = params.value.get("p");
+  const iv = params.value.get("iv");
+  const m = params.value.get("m");
+  if (p && iv && m) {
+    decryptData({ p, iv, m });
+    page.value = Route.Receive;
+  } else if (p) {
+    localStorage.setItem(LOCAL_STORAGE_KEYS.REQUEST_PUBLIC_KEY, p);
+    page.value = Route.Send;
+  } else {
+    generateRequestUrl();
+    page.value = Route.Request;
+  }
+};