diff --git a/tests/login-identity-preference.spec.ts b/tests/login-identity-preference.spec.ts
new file mode 100644
index 0000000..535b275
--- /dev/null
+++ b/tests/login-identity-preference.spec.ts
@@ -0,0 +1,91 @@
+import type { Page, Route } from '@playwright/test'
+
+import { captureScreenshot, expect, test } from './fixtures'
+
+test.use({ trace: 'off', video: 'off' })
+
+const loginContext = {
+  defaultRoleCode: 'admin',
+  roles: [
+    { code: 'teacher', label: '教员', accountLabel: '教员账号', organizationMode: 'CASCADE', organizationLabels: ['教学系', '教研室'] },
+    { code: 'admin', label: '管理员', accountLabel: '管理员账号', organizationMode: 'NONE', organizationLabels: [] },
+  ],
+  departments: [
+    {
+      id: '100', code: 'EQUIPMENT', name: '工程装备系', parentId: null,
+      children: [{ id: '110', code: 'MAINTENANCE', name: '维修教研室', parentId: '100', children: [] }],
+    },
+  ],
+}
+
+const identities = [
+  { id: '402', displayName: '杜晴', departmentId: '110', departmentName: '维修教研室' },
+]
+
+const envelope = (data: unknown) => JSON.stringify({
+  code: 200,
+  message: '成功',
+  data,
+  timestamp: '2026-08-29T12:00:00+08:00',
+  requestId: 'ape2e-login-identity-preference',
+})
+
+const fulfill = (route: Route, data: unknown) => route.fulfill({
+  status: 200,
+  contentType: 'application/json',
+  body: envelope(data),
+})
+
+async function mockLoginDependencies(page: Page) {
+  await page.route('**/api/auth/v1/**', async (route) => {
+    const path = new URL(route.request().url()).pathname
+    if (path.endsWith('/auth/login-context')) return fulfill(route, loginContext)
+    if (path.endsWith('/auth/login-identities')) return fulfill(route, identities)
+    if (path.endsWith('/system-config/public')) return fulfill(route, {})
+    return fulfill(route, {})
+  })
+}
+
+test('登录页恢复上次成功登录的部门和账号但不保存密码', async ({ page }, testInfo) => {
+  await page.addInitScript(() => {
+    window.localStorage.setItem('ai-person:web:login-identity-preference:v1', JSON.stringify({
+      lastRoleCode: 'teacher',
+      selections: {
+        teacher: { departmentId: '110', userId: '402', username: '' },
+      },
+    }))
+  })
+  await mockLoginDependencies(page)
+
+  await page.goto('/login')
+
+  await expect(page.locator('[data-role-code="teacher"]')).toHaveAttribute('aria-pressed', 'true')
+  const organizationSelects = page.locator('.login-role-fields .login-picker:not(.login-identity-picker)')
+  await expect(organizationSelects.nth(0)).toContainText('工程装备系')
+  await expect(organizationSelects.nth(1)).toContainText('维修教研室')
+  await expect(page.locator('.login-identity-picker')).toContainText('杜晴')
+  await expect(page.locator('input[name="password"]')).toHaveValue('')
+  await expect(page.getByRole('button', { name: '登录' })).toBeDisabled()
+  await captureScreenshot(page, testInfo, 'restored-login-identity-without-password')
+})
+
+test('已删除的部门或账号不会被本地偏好错误回填', async ({ page }) => {
+  await page.addInitScript(() => {
+    window.localStorage.setItem('ai-person:web:login-identity-preference:v1', JSON.stringify({
+      lastRoleCode: 'teacher',
+      selections: {
+        teacher: { departmentId: '999', userId: '999', username: '' },
+      },
+    }))
+  })
+  await mockLoginDependencies(page)
+
+  await page.goto('/login')
+
+  await expect(page.locator('[data-role-code="teacher"]')).toHaveAttribute('aria-pressed', 'true')
+  const organizationSelects = page.locator('.login-role-fields .login-picker:not(.login-identity-picker)')
+  await expect(organizationSelects.nth(0).locator('.el-select__placeholder').first()).toContainText('请选择教学系')
+  await expect(organizationSelects.nth(1).getByRole('combobox')).toBeDisabled()
+  await expect(page.locator('.login-identity-picker').getByRole('combobox')).toBeDisabled()
+  await expect(page.locator('input[name="password"]')).toHaveValue('')
+})