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-usercenter/pnpm-lock.yaml

@@ -634,6 +634,9 @@ importers:
       '@element-plus/icons-vue':
         specifier: ^2.3.2
         version: 2.3.2(vue@3.5.24(typescript@5.9.3))
+      '@ungap/structured-clone':
+        specifier: 1.3.0
+        version: 1.3.0
       '@vueuse/core':
         specifier: 'catalog:'
         version: 13.9.0(vue@3.5.24(typescript@5.9.3))
@@ -674,6 +677,9 @@ importers:
       '@types/node-forge':
         specifier: ^1.3.14
         version: 1.3.14
+      '@types/ungap__structured-clone':
+        specifier: 1.2.0
+        version: 1.2.0
       unplugin-element-plus:
         specifier: 'catalog:'
         version: 0.10.0
@@ -4028,6 +4034,9 @@ packages:
   '@types/trusted-types@2.0.7':
     resolution: {integrity: sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==}
 
+  '@types/ungap__structured-clone@1.2.0':
+    resolution: {integrity: sha512-ZoaihZNLeZSxESbk9PUAPZOlSpcKx81I1+4emtULDVmBLkYutTcMlCj2K9VNlf9EWODxdO6gkAqEaLorXwZQVA==}
+
   '@types/unist@2.0.11':
     resolution: {integrity: sha512-CmBKiL6NNo/OqgmMn95Fk9Whlp2mtvIv+KNpQKN2F4SjvrEesubTRWGYSg+BnWZOnlCaSTU1sMpsBOzgbYhnsA==}
 
@@ -13006,6 +13015,8 @@ snapshots:
 
   '@types/trusted-types@2.0.7': {}
 
+  '@types/ungap__structured-clone@1.2.0': {}
+
   '@types/unist@2.0.11': {}
 
   '@types/unist@3.0.3': {}