-- Table: user_devices (تسجيل أجهزة المستخدمين الفعلية وربط بصمة العتاد بالجلسات)
CREATE TABLE IF NOT EXISTS `user_devices` (
  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  `user_id` BIGINT UNSIGNED NOT NULL,
  `identity_id` BIGINT UNSIGNED NULL,
  `device_fingerprint` VARCHAR(128) NOT NULL,
  `platform` VARCHAR(32) NOT NULL DEFAULT 'other',
  `device_name` VARCHAR(128) NULL,
  `device_model` VARCHAR(128) NULL,
  `os_version` VARCHAR(64) NULL,
  `is_active` TINYINT(1) NOT NULL DEFAULT 1,
  `last_active_at` TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `created_at` TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uq_user_device` (`user_id`, `device_fingerprint`),
  KEY `idx_device_fingerprint` (`device_fingerprint`),
  KEY `idx_device_identity` (`identity_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;