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/package.json

@@ -27,6 +27,7 @@
     "@types/node": "^22.0.0",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
+    "jsdom": "^29.0.0",
     "tailwindcss": "^4.0.0",
     "typescript": "^5.8.0",
     "vitest": "^2.0.0"