支持企微通讯录缺失手机号（07-26-internal-ops-recovery-baseline）

client/src/pages/EmployeeProfilePage.tsx

@@ -802,7 +802,7 @@ export function EmployeeProfilePage() {
                 <div>
                   <div className="text-sm text-zinc-500">手机 / 邮箱</div>
                   <div className="mt-2 text-sm text-zinc-900">
-                    {profile.employee.phone} / {profile.employee.email}
+                    {profile.employee.phone ?? "未填写"} / {profile.employee.email}
                   </div>
                 </div>
                 <div>