task-42(账号/权限页面): 实现用户列表查询适配

新增 users-model.ts 纯解析(Java AdminUserItemVo snake_case→camelCase、
缺 id 行过滤、分页字段归一、success=false 抛后端 message)与 users.ts
adapter(fetchUserList：normalize+GET /api/admin/users+parse)；UsersPage
改用 adapter，去掉模板内联 http.get+unwrap。task-41 依赖断言改指数据层。
8 用例全过，299 单测 + build 绿。

admin-frontend-vue/src/pages/account/UsersPage.vue

@@ -1,9 +1,9 @@
 <script setup lang="ts">
 import { onMounted, reactive, ref } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { http, unwrap } from '@/api/http'
+import { http } from '@/api/http'
 import type { AdminUser } from '@/types/admin'
-import type { UserPageResult } from '@/api/users-dto'
+import { fetchUserList } from '@/api/users'
 
 const loading = ref(false)
 const rows = ref<AdminUser[]>([])
@@ -13,11 +13,9 @@ const form = reactive({ username: '', page: 1, pageSize: 15 })
 async function loadUsers() {
   loading.value = true
   try {
-    const { data } = await http.get('/api/admin/users', { params: { username: form.username || undefined, page: form.page, page_size: form.pageSize } })
-    const result = unwrap<UserPageResult | { data?: UserPageResult }>(data)
-    const value: UserPageResult = 'data' in result && result.data ? result.data : result as UserPageResult
-    rows.value = value.items || []
-    total.value = Number(value.total || 0)
+    const page = await fetchUserList({ page: form.page, pageSize: form.pageSize, keyword: form.username || undefined })
+    rows.value = page.items
+    total.value = page.total
   } catch (error) {
     ElMessage.error(error instanceof Error ? error.message : '用户列表加载失败')
   } finally {