fix: 提升管理端启动与导航稳定性

- 等待初始路由就绪并提供可恢复的启动失败页面

- 收敛失效登录导航并按需加载 SVG 图标资源

easyflow-ui-admin/app/src/main.ts

@@ -1,10 +1,19 @@
 /* eslint-disable perfectionist/sort-imports -- 兼容层必须先于所有业务依赖执行。 */
 import './polyfills';
+import './startup-error.css';
 
-import {initPreferences, preferences, updatePreferences,} from '@easyflow/preferences';
-import {unmountGlobalLoading} from '@easyflow/utils';
+import {
+  initPreferences,
+  preferences,
+  updatePreferences,
+} from '@easyflow/preferences';
+import { unmountGlobalLoading } from '@easyflow/utils';
 
-import {normalizeBrandAssetPreferences, overridesPreferences,} from './preferences';
+import {
+  normalizeBrandAssetPreferences,
+  overridesPreferences,
+} from './preferences';
+import { renderStartupError } from './startup-error';
 
 /**
  * 应用初始化完成之后再进行页面加载渲染
@@ -36,4 +45,8 @@ async function initApplication() {
   unmountGlobalLoading();
 }
 
-initApplication();
+initApplication().catch((error) => {
+  console.error('Application startup failed.', error);
+  renderStartupError();
+  unmountGlobalLoading();
+});