test(web): add 57 UI component and hook tests with jsdom cleanup

Fix jsdom environment: add esbuild automatic JSX transform and
afterEach cleanup to prevent DOM leakage between tests.

Components: Badge (8), Button (13), FilterBar (5), EmptyState (8),
ConfirmDialog (8), useSelection hook (15).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/vitest-setup.ts

@@ -1 +1,7 @@
 import "@testing-library/jest-dom/vitest";
+import { cleanup } from "@testing-library/react";
+import { afterEach } from "vitest";
+
+afterEach(() => {
+  cleanup();
+});