test: configure Vitest testing framework

- Add vitest, @testing-library/react, @vitest/ui, jsdom dependencies
- Create vitest.config.ts with jsdom environment and coverage settings
- Add tests/setup.ts with localStorage mock and crypto mock
- Add tests/gateway/ws-client.test.ts for GatewayClient unit tests

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

package.json

@@ -12,7 +12,14 @@
     "gateway:status": "openclaw status",
     "gateway:doctor": "openclaw doctor"
   },
-  "keywords": ["ai", "agent", "openclaw", "tauri", "feishu", "chinese-models"],
+  "keywords": [
+    "ai",
+    "agent",
+    "openclaw",
+    "tauri",
+    "feishu",
+    "chinese-models"
+  ],
   "author": "ZCLAW Team",
   "license": "MIT",
   "dependencies": {
@@ -20,10 +27,15 @@
     "zod": "^3.22.0"
   },
   "devDependencies": {
+    "@testing-library/react": "^16.3.2",
     "@types/node": "^20.11.0",
     "@types/ws": "^8.5.10",
-    "typescript": "^5.3.0",
+    "@vitejs/plugin-react": "^5.1.4",
+    "@vitest/ui": "^4.0.18",
+    "jest": "^29.7.0",
+    "jsdom": "^28.1.0",
     "tsx": "^4.7.0",
-    "jest": "^29.7.0"
+    "typescript": "^5.3.0",
+    "vitest": "^4.0.18"
   }
 }