fix(manager): 钉住 webpack 5.108.4，修复生产构建 $filters 全部报错

webpack 5.108.0 回归（webpack/webpack#21278）：生产构建在 mangleExports 下遇到 namespace import 整体逃逸（app.config.globalProperties.$filters = filters）时，会把混淆后的导出名当属性路径渲染（u6 -> .u[6]），导致 $filters.unitPrice 等全部报 Cannot read properties of undefined (reading '6')；dev server 不启用 mangleExports，本地无法复现。

- manager：webpack 固定 5.108.4（devDependencies + resolutions），pnpm-lock 同步更新
- buyer：纳入 pnpm-lock.yaml（webpack 5.111.0）

Refs: https://github.com/webpack/webpack/issues/21278

manager/package.json

@@ -53,10 +53,11 @@
     "style-loader": "^3.3.4",
     "style-resources-loader": "^1.5.0",
     "vue-cli-plugin-style-resources-loader": "^0.1.5",
-    "webpack": "^5.95.0"
+    "webpack": "5.108.4"
   },
   "resolutions": {
     "minimatch": "^3.1.2",
-    "@achrinza/node-ipc": "9.2.2"
+    "@achrinza/node-ipc": "9.2.2",
+    "webpack": "5.108.4"
   }
 }