-- pbl_domain_ext 表 DDL（自动生成，与 apps/pbls/scripts/ddl/pbls_tables.sql 同源）
CREATE TABLE IF NOT EXISTS `pbl_tenant` (
  `tenant_id` VARCHAR(32) NOT NULL NOT NULL COMMENT 租户ID(强制打头),
  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT COMMENT 主键,
  `tenant_uid` VARCHAR(32) NOT NULL COMMENT "租户UID",
  `name` VARCHAR(128) NOT NULL COMMENT "名称",
  `kind` VARCHAR(64) NOT NULL COMMENT "类型",
  `plan` VARCHAR(64) NOT NULL COMMENT "套餐",
  `seat_limit` INT NOT NULL DEFAULT 0 COMMENT "席位",
  `status` VARCHAR(64) NOT NULL COMMENT "状态",
  `config_json` LONGTEXT NULL COMMENT "配置",
  `created_at` DATETIME NOT NULL DEFAULT '1970-01-01 00:00:00' COMMENT "创建时间(应用层写入)",
  `updated_at` DATETIME NOT NULL DEFAULT '1970-01-01 00:00:00' COMMENT "更新时间(应用层写入)",
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_ten_uid` (`tenant_id`, `tenant_uid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT="租户（多租户边界第25章，不改基表）";

CREATE TABLE IF NOT EXISTS `pbl_class` (
  `tenant_id` VARCHAR(32) NOT NULL NOT NULL COMMENT 租户ID(强制打头),
  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT COMMENT 主键,
  `class_uid` VARCHAR(32) NOT NULL COMMENT "班级UID",
  `name` VARCHAR(128) NOT NULL COMMENT "名称",
  `grade` VARCHAR(64) NOT NULL COMMENT "年级",
  `teacher_id` VARCHAR(32) NOT NULL COMMENT "教师",
  `student_count` INT NOT NULL DEFAULT 0 COMMENT "学生数",
  `roster_json` LONGTEXT NULL COMMENT "花名册",
  `status` VARCHAR(64) NOT NULL COMMENT "状态",
  `created_at` DATETIME NOT NULL DEFAULT '1970-01-01 00:00:00' COMMENT "创建时间(应用层写入)",
  `updated_at` DATETIME NOT NULL DEFAULT '1970-01-01 00:00:00' COMMENT "更新时间(应用层写入)",
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_cls_uid` (`tenant_id`, `class_uid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT="班级（花名册内联 roster_json）";

CREATE TABLE IF NOT EXISTS `pbl_team` (
  `tenant_id` VARCHAR(32) NOT NULL NOT NULL COMMENT 租户ID(强制打头),
  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT COMMENT 主键,
  `team_uid` VARCHAR(32) NOT NULL COMMENT "团队UID",
  `class_id` BIGINT UNSIGNED NOT NULL COMMENT "班级",
  `name` VARCHAR(128) NOT NULL COMMENT "名称",
  `mission_id` BIGINT UNSIGNED NOT NULL COMMENT "Mission",
  `members_json` LONGTEXT NULL COMMENT "成员",
  `capacity` INT NOT NULL DEFAULT 0 COMMENT "容量",
  `status` VARCHAR(64) NOT NULL COMMENT "状态",
  `session_id` BIGINT UNSIGNED NOT NULL COMMENT "绑定会话",
  `created_at` DATETIME NOT NULL DEFAULT '1970-01-01 00:00:00' COMMENT "创建时间(应用层写入)",
  `updated_at` DATETIME NOT NULL DEFAULT '1970-01-01 00:00:00' COMMENT "更新时间(应用层写入)",
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_team_uid` (`tenant_id`, `team_uid`),
  KEY `idx_team_class` (`tenant_id`, `class_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT="团队（成员内联 members_json，不改基表）";