-- 充提申请表
CREATE TABLE IF NOT EXISTS `fund_requests` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `type` enum('deposit','withdraw') NOT NULL COMMENT '充值/提现',
  `amount` decimal(15,2) NOT NULL,
  `status` enum('pending','approved','rejected') DEFAULT 'pending',
  `remark` text COMMENT '用户备注',
  `admin_remark` text COMMENT '管理员备注',
  `operator_id` int(11) DEFAULT NULL COMMENT '审核人ID',
  `created_at` datetime DEFAULT CURRENT_TIMESTAMP,
  `processed_at` datetime DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `idx_user_id` (`user_id`),
  KEY `idx_status` (`status`),
  KEY `idx_type_status` (`type`, `status`),
  KEY `idx_created_at` (`created_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='充提申请记录';