Add live account appeal updates and restricted status settings

tests/realtime-refresh.test.ts

@@ -0,0 +1,52 @@
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { realtimeRefresh } from "../lib/realtime-refresh";
+
+test("Realtime refresh coalesces bursts and retains changes arriving during a request", async () => {
+  const releases: Array<() => void> = [];
+  let calls = 0;
+  const queue = realtimeRefresh(
+    () => {
+      calls++;
+      return new Promise<void>((resolve) => releases.push(resolve));
+    },
+    () => assert.fail("unexpected failure"),
+  );
+  const first = queue.request();
+  await queue.request();
+  await queue.request();
+  assert.equal(calls, 1);
+  releases.shift()!();
+  await Promise.resolve();
+  assert.equal(calls, 2, "One follow-up fetch captures the newest state");
+  releases.shift()!();
+  await first;
+  assert.equal(calls, 2);
+  queue.close();
+  await queue.request();
+  assert.equal(calls, 2);
+});
+
+test("Realtime refresh recovers after a failed fetch and cancels queued work on unmount", async () => {
+  const errors: unknown[] = [];
+  let calls = 0;
+  let release: () => void = () => {};
+  const queue = realtimeRefresh(
+    async () => {
+      calls++;
+      if (calls === 1) throw Error("offline");
+      await new Promise<void>((resolve) => {
+        release = resolve;
+      });
+    },
+    (e) => errors.push(e),
+  );
+  await queue.request();
+  assert.equal(errors.length, 1);
+  const second = queue.request();
+  await queue.request();
+  queue.close();
+  release();
+  await second;
+  assert.equal(calls, 2, "Closing prevents the pending follow-up request");
+});