test: 覆盖登录身份记忆

tests/auth-login-contract.spec.ts

@@ -212,6 +212,46 @@ const expectElementSelectPlaceholder = async (select: Locator, placeholder: stri
 }
 
 test.describe('登录上下文 UI 契约', () => {
+  test('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('unreal-tran:web:login-identity-preference:v1', JSON.stringify({
+        lastRoleCode: 'teacher',
+        selections: {
+          teacher: { departmentId: '110', userId: '402', username: '' },
+        },
+      }))
+    })
+
+    await openLoginWithContext(page)
+
+    await expect(page.locator('[data-role-code="teacher"]')).toHaveAttribute('aria-pressed', 'true')
+    await expect(page.getByTestId('login-organization')).toContainText('工程装备系')
+    await expect(page.getByTestId('login-department')).toContainText('维修教研室')
+    await expect(identitySelect(page)).toContainText('杜晴')
+    await expect(passwordInput(page)).toHaveValue('')
+    await expect(submitButton(page)).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('unreal-tran:web:login-identity-preference:v1', JSON.stringify({
+        lastRoleCode: 'teacher',
+        selections: {
+          teacher: { departmentId: '999', userId: '999', username: '' },
+        },
+      }))
+    })
+
+    await openLoginWithContext(page)
+
+    await expect(page.locator('[data-role-code="teacher"]')).toHaveAttribute('aria-pressed', 'true')
+    await expectElementSelectPlaceholder(page.getByTestId('login-organization'), '请选择教学系')
+    await expect(page.getByTestId('login-department')).toBeDisabled()
+    await expect(identitySelect(page)).toBeDisabled()
+    await expect(passwordInput(page)).toHaveValue('')
+  })
+
   test('默认管理员且四个身份展示各自约定字段', async ({ page }, testInfo) => {
     await openLoginWithContext(page)