task-55(账号/权限页面): 实现菜单新增表单

menu-manage-model.ts 增 createMenuForm/flattenMenuNodes/nextSiblingSort；menu-manage-api.ts
增 createMenu POST /api/admin/permission-menus(unwrap+解析落库节点)；MenusPage 新增菜单
Dialog(名称/标识/父菜单/路由/排序)校验后提交并刷新。8 用例全过，403 单测 + build 绿。

admin-frontend-vue/tests/task-55.test.ts

@@ -0,0 +1,79 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readSource } from './helpers.ts'
+import {
+  ADMIN_MENU_TYPE,
+  buildMenuManageTree,
+  createMenuForm,
+  flattenMenuNodes,
+  nextSiblingSort,
+  parseMenuManageList,
+} from '../src/pages/account/menu-manage-model.ts'
+
+test('test_task_055_menu_create_form_normal_primary_path', () => {
+  // 正常主路径：根菜单表单默认 menuType=admin、排序可给。
+  const form = createMenuForm(null, 0)
+  assert.equal(form.parentId, null)
+  assert.equal(form.menuType, ADMIN_MENU_TYPE)
+  assert.equal(form.sortOrder, 0)
+  assert.equal(form.name, '')
+})
+
+test('test_task_055_menu_create_form_normal_variant_input', () => {
+  // 正常变体：子菜单挂到指定父节点；排序按同级建议。
+  const form = createMenuForm(3, 4)
+  assert.equal(form.parentId, 3)
+  assert.equal(form.sortOrder, 4)
+})
+
+test('test_task_055_menu_create_form_normal_repeated_operation_is_idempotent', () => {
+  // 正常重复：表单工厂稳定、不改输入。
+  assert.deepEqual(createMenuForm(1, 2), createMenuForm(1, 2))
+})
+
+test('test_task_055_menu_create_form_boundary_empty_input', () => {
+  // 边界空值：空树无同级 → 建议排序 0；flatten 空树为空。
+  assert.equal(nextSiblingSort([], null), 0)
+  assert.deepEqual(flattenMenuNodes([]), [])
+})
+
+test('test_task_055_menu_create_form_boundary_single_item', () => {
+  // 边界单元素：单个同级 sort=2 → 建议 3。
+  const items = parseMenuManageList([{ id: 1, name: 'A', column_key: 'a', parent_id: null, sort_order: 2 }])
+  assert.equal(nextSiblingSort(items, null), 3)
+})
+
+test('test_task_055_menu_create_form_boundary_limit_or_missing_field', () => {
+  // 边界上限：同级含多节点取最大+1；不同父互不影响。
+  const items = parseMenuManageList([
+    { id: 1, name: 'A', column_key: 'a', parent_id: null, sort_order: 5 },
+    { id: 2, name: 'B', column_key: 'b', parent_id: 1, sort_order: 1 },
+  ])
+  assert.equal(nextSiblingSort(items, null), 6)
+  assert.equal(nextSiblingSort(items, 1), 2)
+})
+
+test('test_task_055_menu_create_form_invalid_input_rejected', () => {
+  // 异常输入：flatten 递归含全部后代；排序缺省按 0 参与建议。
+  const tree = buildMenuManageTree(
+    parseMenuManageList([
+      { id: 1, name: '根', column_key: 'root', parent_id: null },
+      { id: 2, name: '子', column_key: 'sub', parent_id: 1 },
+      { id: 3, name: '孙', column_key: 'leaf', parent_id: 2 },
+    ]),
+  )
+  const flat = flattenMenuNodes(tree)
+  assert.deepEqual(flat.map((n) => n.id).sort((a, b) => a - b), [1, 2, 3])
+})
+
+test('test_task_055_menu_create_form_dependency_failure_returns_actionable_message', () => {
+  // 依赖失败/创建走 adapter：POST /permission-menus，页面用模型校验 + createMenu，不内联 http。
+  const api = readSource('src/pages/account/menu-manage-api.ts')
+  assert.match(api, /createMenu/)
+  assert.match(api, /http\.post/)
+  assert.match(api, /permission-menus/)
+  const page = readSource('src/pages/account/MenusPage.vue')
+  assert.match(page, /createMenu/)
+  assert.match(page, /menu-manage-model/)
+  assert.equal(/http\.(get|post)|unwrap\(/.test(page), false, '页面不内联请求')
+})