init test suite

package.json

@@ -18,7 +18,10 @@
     "tail:email-service": "wrangler tail -c workers/email/wrangler-email.toml",
     "tail:analytics-service": "wrangler tail -c workers/analytics/wrangler-analytics.toml",
     "tail:session-proxy": "wrangler tail -c workers/session-proxy/wrangler-session-proxy.toml --env production",
-    "openai:local": "./scripts/start_inference_server.sh"
+    "openai:local": "./scripts/start_inference_server.sh",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage"
   },
   "devDependencies": {
     "@anthropic-ai/sdk": "^0.32.1",
@@ -26,6 +29,9 @@
     "@cloudflare/workers-types": "^4.20241205.0",
     "@emotion/react": "^11.13.5",
     "@emotion/styled": "^11.13.5",
+    "@testing-library/jest-dom": "^6.4.2",
+    "@testing-library/react": "^14.2.1",
+    "@testing-library/user-event": "^14.5.2",
     "@types/marked": "^6.0.0",
     "@vitejs/plugin-react": "^4.3.4",
     "chokidar": "^4.0.1",
@@ -33,6 +39,7 @@
     "isomorphic-dompurify": "^2.19.0",
     "itty-router": "^5.0.18",
     "js-cookie": "^3.0.5",
+    "jsdom": "^24.0.0",
     "katex": "^0.16.20",
     "lucide-react": "^0.436.0",
     "marked": "^15.0.4",
@@ -55,6 +62,7 @@
     "vike": "0.4.193",
     "vite": "^5.4.11",
     "vite-plugin-pwa": "^1.0.0",
+    "vitest": "^1.2.1",
     "wrangler": "^4.18.0",
     "zod": "^3.23.8"
   },