refactor: migrate to RemoteOAuthStorage for web OAuth handling

clients/web/src/lib/remoteOAuthStorage.test.ts

@@ -0,0 +1,66 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import {
+  getRemoteOAuthStorage,
+  getWebRemoteOAuthStorage,
+  resetWebRemoteOAuthStorageCacheForTests,
+} from "./remoteOAuthStorage";
+
+describe("remoteOAuthStorage", () => {
+  afterEach(() => {
+    resetWebRemoteOAuthStorageCacheForTests();
+  });
+
+  it("returns one RemoteOAuthStorage instance per cache key", () => {
+    const a = getRemoteOAuthStorage({
+      baseUrl: "http://127.0.0.1:6277",
+      authToken: "tok-a",
+    });
+    const aAgain = getRemoteOAuthStorage({
+      baseUrl: "http://127.0.0.1:6277",
+      authToken: "tok-a",
+    });
+    const b = getRemoteOAuthStorage({
+      baseUrl: "http://127.0.0.1:6277",
+      authToken: "tok-b",
+    });
+
+    expect(aAgain).toBe(a);
+    expect(b).not.toBe(a);
+  });
+
+  it("getWebRemoteOAuthStorage uses window.location origin", () => {
+    vi.stubGlobal("window", {
+      location: {
+        protocol: "http:",
+        host: "127.0.0.1:6299",
+      },
+    });
+
+    const storage = getWebRemoteOAuthStorage("smoke-web-token");
+    const again = getWebRemoteOAuthStorage("smoke-web-token");
+
+    expect(again).toBe(storage);
+    vi.unstubAllGlobals();
+  });
+
+  it("throws when window is unavailable", () => {
+    vi.stubGlobal("window", undefined);
+    expect(() => getWebRemoteOAuthStorage()).toThrow(
+      "getWebRemoteOAuthStorage requires a browser environment",
+    );
+    vi.unstubAllGlobals();
+  });
+
+  it("creates a new instance after the test cache reset", () => {
+    const first = getRemoteOAuthStorage({
+      baseUrl: "http://127.0.0.1:6277",
+      authToken: "reset-me",
+    });
+    resetWebRemoteOAuthStorageCacheForTests();
+    const second = getRemoteOAuthStorage({
+      baseUrl: "http://127.0.0.1:6277",
+      authToken: "reset-me",
+    });
+    expect(second).not.toBe(first);
+  });
+});