fix: package.json添加dependencies, 修复新机器npm install空跑问题

- package.json: 声明 vue/element-plus/marked/vite 等依赖
- setup.sh/start.sh: 用 npm run build 替代 npx vite build
- start.sh: 构建前自动 npm install --include=dev
- 重新生成 package-lock.json

frontend/package.json

@@ -6,5 +6,18 @@
     "dev": "vite",
     "build": "vite build",
     "preview": "vite preview"
+  },
+  "dependencies": {
+    "vue": "^3.5.0",
+    "element-plus": "^2.9.0",
+    "@element-plus/icons-vue": "^2.3.0",
+    "marked": "^15.0.0"
+  },
+  "devDependencies": {
+    "vite": "^6.0.0",
+    "@vitejs/plugin-vue": "^5.0.0"
+  },
+  "allowScripts": {
+    "esbuild@0.25.12": true
   }
 }