fix(web): add jsdom dependency and exclude e2e from vitest

- Add missing jsdom dev dependency for vitest jsdom environment
- Exclude e2e/ directory from vitest (Playwright tests run separately)
- Fixes CI test step failure on pipeline #163

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/vitest.config.ts

@@ -4,5 +4,6 @@ export default defineConfig({
   test: {
     globals: true,
     environment: 'jsdom',
+    exclude: ['e2e/**', 'node_modules/**'],
   },
 });