fix: 兼容 Chrome 90 前端运行环境

- 为管理端与用户中心补齐旧浏览器运行时 API 和回归测试

- 增加现代 CSS 与选择器降级，保持现有界面效果

- 固定 Chrome 90 构建目标并补充兼容依赖

easyflow-ui-admin/app/package.json

@@ -37,6 +37,7 @@
     "@codemirror/view": "^6.39.15",
     "@element-plus/icons-vue": "^2.3.2",
     "@tinyflow-ai/vue": "workspace:*",
+    "@ungap/structured-clone": "1.3.0",
     "@vueuse/core": "catalog:",
     "@wangeditor/editor": "^5.1.23",
     "@wangeditor/editor-for-vue": "^5.1.12",
@@ -53,10 +54,12 @@
     "vue-cropper": "^1.1.4",
     "vue-element-plus-x": "catalog:",
     "vue-router": "catalog:",
-    "vue3-json-viewer": "^2.4.1"
+    "vue3-json-viewer": "^2.4.1",
+    "wicg-inert": "3.1.3"
   },
   "devDependencies": {
     "@types/node-forge": "^1.3.14",
+    "@types/ungap__structured-clone": "1.2.0",
     "cssnano": "catalog:",
     "unplugin-element-plus": "catalog:"
   }