fix: 将 playwright 移到 production dependencies

问题：Docker 构建时使用 --production 标志，导致 playwright
无法找到

修复：将 @playwright/test 从 devDependencies 移到 dependencies

package.json

@@ -11,7 +11,6 @@
     "test:ui": "bunx playwright test --ui"
   },
   "devDependencies": {
-    "@playwright/test": "^1.49.0",
     "@types/bun": "latest",
     "typescript-language-server": "^5.1.3"
   },
@@ -19,6 +18,7 @@
     "typescript": "^5.9.3"
   },
   "dependencies": {
+    "@playwright/test": "^1.49.0",
     "axios": "^1.9.0",
     "cors": "^2.8.5",
     "crypto": "^1.0.1",