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/router/guard.ts

@@ -20,6 +20,7 @@ import {
   removeDevLoginQuery,
   shouldAttemptDevLogin,
 } from './dev-login';
+import { resolveNavigationUserInfo } from './navigation-user-info';
 
 interface NetworkConnectionLike {
   effectiveType?: string;
@@ -75,6 +76,13 @@ function setupChunkErrorGuard(router: Router) {
     if (!isDynamicImportChunkError(error)) {
       return;
     }
+
+    // 开发环境保留当前页面和调试上下文，避免模块热更新期间反复整页刷新。
+    if (import.meta.env.DEV) {
+      console.warn('Dynamic route module loading failed:', error);
+      return;
+    }
+
     const fullPath = to?.fullPath;
     if (!fullPath) {
       return;
@@ -156,6 +164,13 @@ function setupAccessGuard(router: Router) {
         query: removeDevLoginQuery(to.query),
       }).fullPath;
 
+    const resolveUserInfo = () =>
+      resolveNavigationUserInfo({
+        cachedUserInfo: userStore.userInfo,
+        fetchUserInfo: authStore.fetchUserInfo,
+        getAccessToken: () => accessStore.accessToken,
+      });
+
     if (devLoginAccount && import.meta.env.DEV && accessStore.accessToken) {
       return resolveCleanFullPath();
     }
@@ -177,10 +192,6 @@ function setupAccessGuard(router: Router) {
           });
         await devLoginPromise;
         const cleanFullPath = resolveCleanFullPath();
-        if (window.location.search.includes('devLogin=')) {
-          window.location.replace(cleanFullPath);
-          return false;
-        }
         return cleanFullPath;
       } catch {
         const cleanFullPath = resolveCleanFullPath();
@@ -198,8 +209,10 @@ function setupAccessGuard(router: Router) {
     // 基本路由，这些路由不需要进入权限拦截
     if (coreRouteNames.includes(to.name as string)) {
       if (to.path === LOGIN_PATH && accessStore.accessToken) {
-        const currentUser =
-          userStore.userInfo || (await authStore.fetchUserInfo());
+        const currentUser = await resolveUserInfo();
+        if (!currentUser) {
+          return true;
+        }
         if (shouldForcePasswordChange(currentUser)) {
           return buildForcePasswordRoute();
         }
@@ -239,7 +252,17 @@ function setupAccessGuard(router: Router) {
       return to;
     }
 
-    const userInfo = userStore.userInfo || (await authStore.fetchUserInfo());
+    const userInfo = await resolveUserInfo();
+    if (!userInfo) {
+      return {
+        path: LOGIN_PATH,
+        query:
+          to.fullPath === preferences.app.defaultHomePath
+            ? {}
+            : { redirect: encodeURIComponent(to.fullPath) },
+        replace: true,
+      };
+    }
     if (shouldForcePasswordChange(userInfo) && !isForcePasswordRoute(to)) {
       if (from.name) {
         notifyForcePasswordChange();