task-2(壳层/路由): 冻结 /admin-vue/ base 与 History 路由契约为单一事实源

新增 src/config/app.ts（APP_BASE_PATH/ensureAppBasePath/joinAdminPath），
vite.config base、router createWebHistory、AdminLayout logo 路径统一消费常量，
禁止散落字面量；8 用例覆盖归一化/幂等/空段/单段/非法输入与字面量单源。

admin-frontend-vue/src/router/index.ts

@@ -0,0 +1,48 @@
+import { createRouter, createWebHistory } from 'vue-router'
+import type { AdminMenuNode } from '@/types/admin'
+import AdminLayout from '@/layout/AdminLayout.vue'
+import { useAdminSessionStore } from '@/stores/admin-session'
+import { findFirstRoute } from './helpers'
+import { APP_BASE_PATH } from '@/config/app'
+
+const router = createRouter({
+  history: createWebHistory(APP_BASE_PATH),
+  routes: [
+    {
+      path: '/',
+      component: AdminLayout,
+      children: [
+        { path: '', redirect: '/account/users' },
+        { path: 'account/users', component: () => import('@/pages/account/UsersPage.vue'), meta: { menuKey: 'admin_users', title: '用户管理' } },
+        { path: 'account/menus', component: () => import('@/pages/account/MenusPage.vue'), meta: { menuKey: 'admin_columns', title: '菜单管理' } },
+        { path: 'account/groups', component: () => import('@/pages/account/GroupsPage.vue'), meta: { menuKey: 'admin_group_manage', title: '数据权限分组' } },
+      ],
+    },
+  ],
+})
+
+router.beforeEach(async (to) => {
+  const session = useAdminSessionStore()
+  if (!session.initialized) {
+    try {
+      await session.initialize()
+    } catch {
+      return false
+    }
+  }
+  if (to.path === '/') return findFirstRoute(session.menuTree)
+  const menuKey = to.meta.menuKey as string | undefined
+  if (menuKey && !session.isSuperAdmin && !hasMenu(session.menuTree, menuKey)) {
+    return findFirstRoute(session.menuTree)
+  }
+  return true
+})
+
+function hasMenu(nodes: AdminMenuNode[], key: string): boolean {
+  return nodes.some((node) => node.key === key || hasMenu(node.children || [], key))
+}
+
+export default router
+
+
+