build(dependencies): 升级 pnpm 并添加图像优化插件

- 将 pnpm 版本从 10.15.0 升级到 10.15.1
- 添加 vite-plugin-image-optimizer 依赖
- 在 Vite 插件中集成图像优化功能

package.json

@@ -1,5 +1,5 @@
 {
-  "packageManager": "pnpm@10.15.0",
+  "packageManager": "pnpm@10.15.1",
   "name": "vue-ts-example",
   "version": "0.0.0",
   "private": true,
@@ -90,6 +90,7 @@
     "ts-enum-util": "^4.1.0",
     "utils4u": "^4.2.3",
     "vant": "^4.9.21",
+    "vite-plugin-image-optimizer": "^2.0.2",
     "vue": "^3.5.18",
     "vue-data-ui": "^3.0.14",
     "vue-draggable-plus": "^0.6.0",