test: design-lab 加 E2e 防画面偏差——结构契约断言 + 五页视觉基线（reducedMotion 稳定截图）

apps/design-lab/package.json

@@ -6,13 +6,16 @@
   "scripts": {
     "dev": "vite",
     "build": "tsc -b && vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test:e2e": "playwright test",
+    "test:e2e:update": "playwright test --update-snapshots"
   },
   "dependencies": {
     "react": "^18.3.1",
     "react-dom": "^18.3.1"
   },
   "devDependencies": {
+    "@playwright/test": "1.63.0",
     "@tailwindcss/vite": "^4.1.0",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
@@ -21,4 +24,4 @@
     "typescript": "~5.6.2",
     "vite": "^6.0.0"
   }
-}
+}