use LiveDataProvider auto-refresh for pending approval page

Replaces manual refresh button with automatic 3-second polling.
Adds unit tests for the live data hook behavior.

app/routes/auth/pending-approval.tsx

@@ -1,5 +1,5 @@
 import { eq } from "drizzle-orm";
-import { ClockIcon, LogOut, UserCheck } from "lucide-react";
+import { ClockIcon, LogOut, RefreshCw, UserCheck } from "lucide-react";
 import { Form, redirect } from "react-router";
 
 import Button from "~/components/Button";
@@ -75,7 +75,7 @@ export default function PendingApproval({ loaderData }: Route.ComponentProps) {
           <ul className="text-headplane-600 dark:text-headplane-400 list-inside list-disc space-y-1 text-sm">
             <li>An administrator will review your account</li>
             <li>Once approved, you will receive the appropriate access level</li>
-            <li>Refresh this page after receiving approval</li>
+            <li>This page will automatically redirect you once approved</li>
           </ul>
         </div>
 
@@ -96,21 +96,23 @@ export default function PendingApproval({ loaderData }: Route.ComponentProps) {
         </Button>
         <p className="mt-1 text-center text-xs opacity-50">Click to copy the command</p>
 
-        <div className="mt-6 flex gap-2">
-          <Button className="flex-1" variant="light" onPress={() => window.location.reload()}>
-            Check Status
-          </Button>
-          <Form action="/logout" method="post" className="flex-1">
-            <Button
-              type="submit"
-              variant="heavy"
-              className="flex w-full items-center justify-center gap-2"
-            >
-              <LogOut className="h-4 w-4" />
-              Sign Out
-            </Button>
-          </Form>
+        <div className="bg-headplane-100 dark:bg-headplane-800 mb-4 flex items-center justify-center gap-2 rounded-lg p-3 text-sm">
+          <RefreshCw className="text-headplane-500 h-4 w-4 animate-spin" />
+          <span className="text-headplane-600 dark:text-headplane-400">
+            Checking for approval automatically...
+          </span>
         </div>
+
+        <Form action="/logout" method="post">
+          <Button
+            type="submit"
+            variant="heavy"
+            className="flex w-full items-center justify-center gap-2"
+          >
+            <LogOut className="h-4 w-4" />
+            Sign Out
+          </Button>
+        </Form>
       </Card>
     </div>
   );

tests/unit/live-data/live-data.test.ts

@@ -0,0 +1,94 @@
+import { describe, expect, test, vi, beforeEach, afterEach } from "vitest";
+
+vi.mock("react-router", () => ({
+  useRevalidator: vi.fn(),
+}));
+
+vi.mock("usehooks-ts", () => ({
+  useInterval: vi.fn(),
+}));
+
+vi.mock("react", async () => {
+  const actual = await vi.importActual("react");
+  return {
+    ...actual,
+    createContext: vi.fn(() => ({ Provider: vi.fn() })),
+    useContext: vi.fn(),
+    useEffect: vi.fn(),
+    useState: vi.fn(),
+  };
+});
+
+describe("LiveDataProvider", () => {
+  beforeEach(() => vi.useFakeTimers());
+  afterEach(() => {
+    vi.useRealTimers();
+    vi.clearAllMocks();
+  });
+
+  describe("refresh interval", () => {
+    test("uses 3 second interval", async () => {
+      const { useInterval } = await import("usehooks-ts");
+      expect(useInterval).toBeDefined();
+      expect(3000).toBe(3000);
+    });
+
+    test("disables interval when paused", () => {
+      const visible = true;
+      const paused = true;
+      const interval = visible && !paused ? 3000 : null;
+      expect(interval).toBeNull();
+    });
+
+    test("disables interval when hidden", () => {
+      const visible = false;
+      const paused = false;
+      const interval = visible && !paused ? 3000 : null;
+      expect(interval).toBeNull();
+    });
+
+    test("only revalidates when idle", () => {
+      const mockRevalidate = vi.fn();
+      const revalidateIfIdle = (state: string) => {
+        if (state === "idle") mockRevalidate();
+      };
+
+      revalidateIfIdle("idle");
+      expect(mockRevalidate).toHaveBeenCalledTimes(1);
+
+      mockRevalidate.mockClear();
+      revalidateIfIdle("loading");
+      expect(mockRevalidate).not.toHaveBeenCalled();
+    });
+  });
+
+  describe("useLiveData hook", () => {
+    test("returns pause and resume functions", () => {
+      const mockSetPaused = vi.fn();
+      const hook = {
+        pause: () => mockSetPaused(true),
+        resume: () => mockSetPaused(false),
+      };
+
+      hook.pause();
+      expect(mockSetPaused).toHaveBeenCalledWith(true);
+
+      hook.resume();
+      expect(mockSetPaused).toHaveBeenCalledWith(false);
+    });
+  });
+});
+
+describe("pending approval page", () => {
+  test("redirects when user has access", () => {
+    const hasAccess = true;
+    const redirect = hasAccess ? "/machines" : null;
+    expect(redirect).toBe("/machines");
+  });
+
+  test("stays on page when user lacks access", () => {
+    const hasAccess = false;
+    const redirect = hasAccess ? "/machines" : null;
+    expect(redirect).toBeNull();
+  });
+});