AI接入 v0.1

src/main/resources/db/schema.sql

@@ -179,3 +179,29 @@ INSERT INTO `category` (`user_id`, `name`, `icon`, `type`, `sort_order`) VALUES
 (NULL, '投资', '📈', 2, 3),
 (NULL, '兼职', '💼', 2, 4),
 (NULL, '其他', '📦', 2, 5);
+
+-- AI 会话表
+CREATE TABLE IF NOT EXISTS `chat_session` (
+  `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '会话ID',
+  `user_id` BIGINT NOT NULL COMMENT '用户ID',
+  `title` VARCHAR(100) NOT NULL DEFAULT '新对话' COMMENT '标题（首条消息自动生成）',
+  `deleted` TINYINT NOT NULL DEFAULT 0 COMMENT '逻辑删除：0正常 1已删除',
+  `create_time` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  `update_time` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '最近活跃时间',
+  PRIMARY KEY (`id`),
+  INDEX `idx_user_updated` (`user_id`, `deleted`, `update_time`),
+  FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='AI会话表';
+
+-- AI 消息表（工具调用的中间过程不入库，历史里只有 user / assistant 文本）
+CREATE TABLE IF NOT EXISTS `chat_message` (
+  `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '消息ID',
+  `session_id` BIGINT NOT NULL COMMENT '会话ID',
+  `role` VARCHAR(16) NOT NULL COMMENT '角色：user / assistant',
+  `content` TEXT NOT NULL COMMENT '消息文本',
+  `deleted` TINYINT NOT NULL DEFAULT 0 COMMENT '逻辑删除：0正常 1已删除',
+  `create_time` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  PRIMARY KEY (`id`),
+  INDEX `idx_session_created` (`session_id`, `deleted`, `create_time`),
+  FOREIGN KEY (`session_id`) REFERENCES `chat_session` (`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='AI消息表';