CREATE TABLE IF NOT EXISTS api_tokens (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  user_id BIGINT UNSIGNED NOT NULL,
  token_hash CHAR(64) NOT NULL,
  device_name VARCHAR(190) NULL,
  platform VARCHAR(40) NOT NULL DEFAULT 'ios',
  last_used_at DATETIME NULL,
  expires_at DATETIME NOT NULL,
  revoked_at DATETIME NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_api_tokens_hash (token_hash),
  KEY idx_api_tokens_user (user_id),
  KEY idx_api_tokens_expires (expires_at),
  CONSTRAINT fk_api_tokens_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;