fix: 修正前端 TypeScript 型別設定以通過 CI 建置

- 加入 @types/node devDependency（Vite 需要 Node.js 型別定義）
- tsconfig.node.json 加入 types: ["node"] 和 lib: ESNext
- 加入 skipLibCheck: true 跳過 node_modules .d.ts 檢查（Vite 官方做法）

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

Author: JW-Albert

frontend/package-lock.json

@@ -14,6 +14,7 @@
     "vue-router": "^4.4.5"
   },
   "devDependencies": {
+    "@types/node": "^25.9.3",
     "@vitejs/plugin-vue": "^5.1.4",
     "@vue/tsconfig": "^0.9.1",
     "typescript": "^5.5.3",

frontend/package.json

@@ -2,11 +2,13 @@
   "compilerOptions": {
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
     "target": "ES2022",
-    "lib": ["ES2023"],
+    "lib": ["ES2023", "ESNext"],
     "module": "ESNext",
     "moduleResolution": "bundler",
+    "types": ["node"],
     "strict": true,
-    "noEmit": true
+    "noEmit": true,
+    "skipLibCheck": true
   },
   "include": ["vite.config.ts"]
 }