diff --git a/admin-frontend-vue/src/pages/account/user-create-model.ts b/admin-frontend-vue/src/pages/account/user-create-model.ts
new file mode 100644
index 00000000..d1e7b662
--- /dev/null
+++ b/admin-frontend-vue/src/pages/account/user-create-model.ts
@@ -0,0 +1,65 @@
+/** 新建用户表单模型（任务 45）：纯逻辑，镜像 Java AdminUserCreateRequest 字段与后端校验。 */
+
+export const CREATE_USERNAME_MIN_LEN = 2
+export const CREATE_PASSWORD_MIN_LEN = 6
+
+/** 新建用户可选角色：super_admin 不可由表单创建（后端只收 admin|normal）。 */
+export type CreatableUserRole = 'normal' | 'admin'
+
+export interface CreateUserForm {
+  username: string
+  password: string
+  role: CreatableUserRole
+  /** 授权菜单 id（后端 replaceDirectPermissions 用）。 */
+  columnIds: number[]
+}
+
+export interface CreateUserFormErrors {
+  username?: string
+  password?: string
+}
+
+/** 发送 POST /api/admin/user 的请求体（与 Java AdminUserCreateRequest camelCase 对齐）。 */
+export interface CreateUserPayload {
+  username: string
+  password: string
+  role: string
+  columnIds: number[]
+}
+
+export function createEmptyCreateUserForm(): CreateUserForm {
+  return { username: '', password: '', role: 'normal', columnIds: [] }
+}
+
+/** 未知/空白/超管角色一律归一到 normal，与后端 "admin"/"normal" 白名单一致。 */
+export function normalizeCreateRole(role: string | null | undefined): CreatableUserRole {
+  return (role || '').trim().toLowerCase() === 'admin' ? 'admin' : 'normal'
+}
+
+/** 表单校验（镜像后端：用户名≥2、密码≥6、均必填）；返回逐字段错误。 */
+export function validateCreateUserForm(form: CreateUserForm): { valid: boolean; errors: CreateUserFormErrors } {
+  const errors: CreateUserFormErrors = {}
+  const username = (form.username || '').trim()
+  if (!username) {
+    errors.username = '用户名不能为空'
+  } else if (username.length < CREATE_USERNAME_MIN_LEN) {
+    errors.username = `用户名至少${CREATE_USERNAME_MIN_LEN}个字符`
+  }
+  const password = form.password || ''
+  if (!password) {
+    errors.password = '密码不能为空'
+  } else if (password.length < CREATE_PASSWORD_MIN_LEN) {
+    errors.password = `密码至少${CREATE_PASSWORD_MIN_LEN}个字符`
+  }
+  return { valid: Object.keys(errors).length === 0, errors }
+}
+
+/** 表单 → 创建请求体：用户名去空格、角色归一、菜单 id 拷贝不共享引用。 */
+export function toCreateUserRequest(form: CreateUserForm): CreateUserPayload {
+  return {
+    username: (form.username || '').trim(),
+    password: form.password || '',
+    role: normalizeCreateRole(form.role),
+    columnIds: Array.isArray(form.columnIds) ? form.columnIds.slice() : [],
+  }
+}
diff --git a/admin-frontend-vue/tests/task-45.test.ts b/admin-frontend-vue/tests/task-45.test.ts
new file mode 100644
index 00000000..2fc8c443
--- /dev/null
+++ b/admin-frontend-vue/tests/task-45.test.ts
@@ -0,0 +1,77 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readSource } from './helpers.ts'
+import {
+  createEmptyCreateUserForm,
+  normalizeCreateRole,
+  toCreateUserRequest,
+  validateCreateUserForm,
+} from '../src/pages/account/user-create-model.ts'
+
+test('test_task_045_create_user_form_normal_primary_path', () => {
+  // 正常主路径：合法用户名/密码/角色通过校验。
+  const form = createEmptyCreateUserForm()
+  form.username = '张伟恒'
+  form.password = 'secret1'
+  form.role = 'normal'
+  const r = validateCreateUserForm(form)
+  assert.equal(r.valid, true)
+  assert.deepEqual(r.errors, {})
+})
+
+test('test_task_045_create_user_form_normal_variant_input', () => {
+  // 正常变体：admin 角色可由 super_admin 创建时通过；用户名/密码去空格后入参。
+  const form = { username: '  ops ', password: '123456', role: 'admin' as const, columnIds: [] }
+  assert.equal(validateCreateUserForm(form).valid, true)
+  const payload = toCreateUserRequest(form)
+  assert.equal(payload.username, 'ops')
+  assert.equal(payload.password, '123456')
+  assert.equal(payload.role, 'admin')
+})
+
+test('test_task_045_create_user_form_normal_repeated_operation_is_idempotent', () => {
+  // 正常重复：空表单工厂稳定；序列化纯函数不改输入。
+  assert.deepEqual(createEmptyCreateUserForm(), createEmptyCreateUserForm())
+  const form = { username: 'a', password: '123456', role: 'normal' as const, columnIds: [] }
+  assert.deepEqual(toCreateUserRequest(form), toCreateUserRequest(form))
+})
+
+test('test_task_045_create_user_form_boundary_empty_input', () => {
+  // 边界空值：空用户名/空密码报可读错误。
+  const form = createEmptyCreateUserForm()
+  const r = validateCreateUserForm(form)
+  assert.equal(r.valid, false)
+  assert.ok(r.errors.username)
+  assert.ok(r.errors.password)
+})
+
+test('test_task_045_create_user_form_boundary_single_item', () => {
+  // 边界单元素：用户名恰好 2 字符、密码恰好 6 字符可通过（镜像后端最小长度）。
+  const form = { username: 'ab', password: '123456', role: 'normal' as const, columnIds: [] }
+  assert.equal(validateCreateUserForm(form).valid, true)
+})
+
+test('test_task_045_create_user_form_boundary_limit_or_missing_field', () => {
+  // 边界上限/过短：用户名 1 字符、密码 5 字符被拒并带长度提示。
+  const r = validateCreateUserForm({ username: 'a', password: '12345', role: 'normal', columnIds: [] })
+  assert.equal(r.valid, false)
+  assert.match(r.errors.username || '', /2/)
+  assert.match(r.errors.password || '', /6/)
+})
+
+test('test_task_045_create_user_form_invalid_input_rejected', () => {
+  // 异常输入：未知角色串归一到 normal，不传非法角色。
+  assert.equal(normalizeCreateRole('super_admin'), 'normal')
+  assert.equal(normalizeCreateRole(''), 'normal')
+  const payload = toCreateUserRequest({ username: 'u', password: '123456', role: 'xxx' as never, columnIds: [] })
+  assert.equal(payload.role, 'normal')
+})
+
+test('test_task_045_create_user_form_dependency_failure_returns_actionable_message', () => {
+  // 依赖失败：表单模型纯逻辑，字段与 Java AdminUserCreateRequest 对齐(camelCase)。
+  const mod = readSource('src/pages/account/user-create-model.ts')
+  assert.equal(/axios|from '\.\.\/\.\.\/api\/http'/.test(mod), false, '表单模型保持纯逻辑')
+  assert.match(mod, /username/)
+  assert.match(mod, /columnIds/)
+  assert.match(mod, /password/)
+})