diff --git a/admin-frontend-vue/src/pages/account/UsersPage.vue b/admin-frontend-vue/src/pages/account/UsersPage.vue
index 8393a125..fcb886bd 100644
--- a/admin-frontend-vue/src/pages/account/UsersPage.vue
+++ b/admin-frontend-vue/src/pages/account/UsersPage.vue
@@ -4,16 +4,17 @@ import { ElMessage, ElMessageBox } from 'element-plus'
 import { http } from '@/api/http'
 import type { AdminUser } from '@/types/admin'
 import { fetchUserList } from '@/api/users'
+import { createUserFilterState, toUserListParams } from './users-filter'
 
 const loading = ref(false)
 const rows = ref<AdminUser[]>([])
 const total = ref(0)
-const form = reactive({ username: '', page: 1, pageSize: 15 })
+const filters = reactive(createUserFilterState())
 
 async function loadUsers() {
   loading.value = true
   try {
-    const page = await fetchUserList({ page: form.page, pageSize: form.pageSize, keyword: form.username || undefined })
+    const page = await fetchUserList(toUserListParams(filters))
     rows.value = page.items
     total.value = page.total
   } catch (error) {
@@ -23,6 +24,12 @@ async function loadUsers() {
   }
 }
 
+/** 提交新筛选条件：重置回第一页再查询。 */
+function search() {
+  filters.page = 1
+  void loadUsers()
+}
+
 async function removeUser(row: AdminUser) {
   try {
     await ElMessageBox.confirm(`确定删除用户“${row.username}”吗？`, '删除确认', { type: 'warning' })
@@ -35,7 +42,7 @@ async function removeUser(row: AdminUser) {
 }
 
 function changePage(page: number) {
-  form.page = page
+  filters.page = page
   void loadUsers()
 }
 
@@ -52,12 +59,12 @@ onMounted(loadUsers)
       <el-button type="primary">新建用户</el-button>
     </div>
     <el-card shadow="never">
-      <el-form inline @submit.prevent="loadUsers">
+      <el-form inline @submit.prevent="search">
         <el-form-item label="用户名">
-          <el-input v-model="form.username" clearable placeholder="模糊搜索" @keyup.enter="loadUsers" />
+          <el-input v-model="filters.keyword" clearable placeholder="模糊搜索" @keyup.enter="search" />
         </el-form-item>
         <el-form-item>
-          <el-button type="primary" @click="loadUsers">查询</el-button>
+          <el-button type="primary" @click="search">查询</el-button>
         </el-form-item>
       </el-form>
     </el-card>
@@ -79,8 +86,8 @@ onMounted(loadUsers)
         <el-pagination
           background
           layout="prev, pager, next"
-          :page-size="form.pageSize"
-          :current-page="form.page"
+          :page-size="filters.pageSize"
+          :current-page="filters.page"
           :total="total"
           @current-change="changePage"
         />
diff --git a/admin-frontend-vue/src/pages/account/users-filter.ts b/admin-frontend-vue/src/pages/account/users-filter.ts
new file mode 100644
index 00000000..8c3fd7d7
--- /dev/null
+++ b/admin-frontend-vue/src/pages/account/users-filter.ts
@@ -0,0 +1,45 @@
+/** 用户页局部筛选/分页状态（任务 43）：纯逻辑、不入 Pinia，页面级可测状态机。 */
+import { USER_PAGE_DEFAULT_SIZE, USER_PAGE_MIN_PAGE, type UserListParams } from '../../api/users-dto.ts'
+
+/** 页面局部查询状态：筛选条件 + 分页；业务表状态不落 Pinia。 */
+export interface UserFilterState {
+  /** 用户名模糊关键字。 */
+  keyword: string
+  /** 按创建管理员过滤（可选）。 */
+  createdByAdminId: number | null
+  page: number
+  pageSize: number
+}
+
+export function createUserFilterState(): UserFilterState {
+  return { keyword: '', createdByAdminId: null, page: USER_PAGE_MIN_PAGE, pageSize: USER_PAGE_DEFAULT_SIZE }
+}
+
+/** 修改筛选条件时重置回第一页（避免停在可能越界的旧页）。 */
+export function withFilterReset(
+  state: UserFilterState,
+  next: Partial<Pick<UserFilterState, 'keyword' | 'createdByAdminId'>>,
+): UserFilterState {
+  return { ...state, ...next, page: USER_PAGE_MIN_PAGE }
+}
+
+/** 翻页只改页码并钳到 >=1，保留筛选条件。 */
+export function withPage(state: UserFilterState, page: number): UserFilterState {
+  return { ...state, page: Math.max(page, USER_PAGE_MIN_PAGE) }
+}
+
+/** 是否存在生效筛选（仅空白关键字不算）。 */
+export function isFilterActive(state: UserFilterState): boolean {
+  return Boolean(state.keyword && state.keyword.trim()) || state.createdByAdminId != null
+}
+
+/** 页面状态 → 查询适配层参数（空关键字不下发）。 */
+export function toUserListParams(state: UserFilterState): UserListParams {
+  const keyword = state.keyword.trim()
+  return {
+    page: state.page,
+    pageSize: state.pageSize,
+    keyword: keyword || undefined,
+    createdById: state.createdByAdminId,
+  }
+}
diff --git a/admin-frontend-vue/tests/task-43.test.ts b/admin-frontend-vue/tests/task-43.test.ts
new file mode 100644
index 00000000..dad36fe1
--- /dev/null
+++ b/admin-frontend-vue/tests/task-43.test.ts
@@ -0,0 +1,71 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readSource } from './helpers.ts'
+import {
+  createUserFilterState,
+  isFilterActive,
+  toUserListParams,
+  withFilterReset,
+  withPage,
+} from '../src/pages/account/users-filter.ts'
+import { USER_PAGE_DEFAULT_SIZE } from '../src/api/users-dto.ts'
+
+test('test_task_043_user_filter_state_normal_primary_path', () => {
+  // 正常主路径：初始筛选状态默认空关键字、无管理员过滤、回到首页。
+  const s = createUserFilterState()
+  assert.equal(s.keyword, '')
+  assert.equal(s.createdByAdminId, null)
+  assert.equal(s.page, 1)
+  assert.equal(s.pageSize, USER_PAGE_DEFAULT_SIZE)
+  assert.equal(isFilterActive(s), false)
+})
+
+test('test_task_043_user_filter_state_normal_variant_input', () => {
+  // 正常变体：填关键字/管理员过滤后为激活态。
+  const s = { ...createUserFilterState(), keyword: '张', createdByAdminId: 3 }
+  assert.equal(isFilterActive(s), true)
+})
+
+test('test_task_043_user_filter_state_normal_repeated_operation_is_idempotent', () => {
+  // 正常重复：工厂每次返回独立等价状态；序列化不改输入。
+  assert.deepEqual(createUserFilterState(), createUserFilterState())
+  const s = withPage(createUserFilterState(), 3)
+  assert.deepEqual(s, s)
+})
+
+test('test_task_043_user_filter_state_boundary_empty_input', () => {
+  // 边界空值：空关键字在序列化时不下发空串。
+  const params = toUserListParams(createUserFilterState())
+  assert.equal(params.keyword, undefined)
+})
+
+test('test_task_043_user_filter_state_boundary_single_item', () => {
+  // 边界单元素：改关键字自动回到第一页，保留分页大小。
+  const s = withFilterReset({ ...createUserFilterState(), page: 4 }, { keyword: 'a' })
+  assert.equal(s.page, 1)
+  assert.equal(s.keyword, 'a')
+  assert.equal(s.pageSize, USER_PAGE_DEFAULT_SIZE)
+})
+
+test('test_task_043_user_filter_state_boundary_limit_or_missing_field', () => {
+  // 边界上限/越界页码：翻页钳到 >=1；大于当前也保留。
+  assert.equal(withPage(createUserFilterState(), 0).page, 1)
+  assert.equal(withPage(createUserFilterState(), 99).page, 99)
+})
+
+test('test_task_043_user_filter_state_invalid_input_rejected', () => {
+  // 异常输入：仅空白关键字不视为激活；筛选与分页参数映射正确。
+  assert.equal(isFilterActive({ ...createUserFilterState(), keyword: '   ' }), false)
+  const params = toUserListParams({ ...createUserFilterState(), keyword: ' x ', page: 2, pageSize: 20 })
+  assert.deepEqual(params, { page: 2, pageSize: 20, keyword: 'x', createdById: null })
+})
+
+test('test_task_043_user_filter_state_dependency_failure_returns_actionable_message', () => {
+  // 依赖失败：页面把筛选/分页状态局部化到 users-filter，不入 Pinia。
+  const page = readSource('src/pages/account/UsersPage.vue')
+  assert.match(page, /users-filter/, '页面复用局部筛选状态模块')
+  assert.equal(/defineStore|useAdminSessionStore/.test(page), false, '筛选状态不落在 session store')
+  const mod = readSource('src/pages/account/users-filter.ts')
+  assert.match(mod, /export function createUserFilterState/)
+  assert.match(mod, /users-dto/, '筛选模块复用分页 DTO 常量')
+})