增加ai配置和ai广场功能

go/docs/sql/alter_platform_ai_chat_session_top.sql

@@ -0,0 +1,4 @@
+-- 会话表增加置顶字段
+ALTER TABLE `yz_platform_ai_chat_session`
+  ADD COLUMN `is_top` tinyint NOT NULL DEFAULT 0 COMMENT '是否置顶 1-是' AFTER `model`,
+  ADD KEY `idx_is_top` (`is_top`);

go/docs/sql/alter_platform_ai_provider_api_type.sql

@@ -0,0 +1,4 @@
+-- 平台 AI 服务商配置增加协议类型字段
+-- api_type: chat_completions(OpenAI Chat Completions) / responses(OpenAI Responses) / anthropic(Anthropic Messages)
+ALTER TABLE `yz_platform_ai_provider`
+  ADD COLUMN `api_type` varchar(30) NOT NULL DEFAULT 'chat_completions' COMMENT '协议类型' AFTER `provider_type`;

go/docs/sql/create_platform_ai_chat.sql

@@ -0,0 +1,25 @@
+-- 平台 AI Playground 会话与消息表
+CREATE TABLE IF NOT EXISTS `yz_platform_ai_chat_session` (
+  `id` bigint unsigned NOT NULL AUTO_INCREMENT,
+  `title` varchar(100) NOT NULL DEFAULT '' COMMENT '会话标题（首条用户消息摘要）',
+  `provider_id` bigint unsigned NOT NULL DEFAULT 0 COMMENT '服务商配置ID',
+  `model` varchar(100) NOT NULL DEFAULT '' COMMENT '模型ID',
+  `create_time` datetime NOT NULL,
+  `update_time` datetime NOT NULL,
+  `delete_time` datetime DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  KEY `idx_delete_time` (`delete_time`),
+  KEY `idx_update_time` (`update_time`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='平台AI会话';
+
+CREATE TABLE IF NOT EXISTS `yz_platform_ai_chat_message` (
+  `id` bigint unsigned NOT NULL AUTO_INCREMENT,
+  `session_id` bigint unsigned NOT NULL DEFAULT 0,
+  `role` varchar(20) NOT NULL DEFAULT '' COMMENT 'user/assistant/system',
+  `content` text COMMENT 'user存原始content JSON（可含附件）；assistant存纯文本',
+  `think` text COMMENT 'assistant思考过程',
+  `seq` int NOT NULL DEFAULT 0 COMMENT '消息序号',
+  `create_time` datetime NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `idx_session_seq` (`session_id`, `seq`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='平台AI会话消息';

go/docs/sql/create_platform_ai_provider.sql

@@ -0,0 +1,20 @@
+-- 平台级 AI 服务商配置（platform「AI管理」页签：DeepSeek / 豆包 / Codex 等接入）
+-- 人工执行；表数据驱动，前端按 provider_type 区分不同服务商 tab
+
+CREATE TABLE IF NOT EXISTS `yz_platform_ai_provider` (
+  `id` bigint unsigned NOT NULL AUTO_INCREMENT,
+  `provider_type` varchar(30) NOT NULL DEFAULT '' COMMENT 'deepseek/doubao/codex/custom',
+  `name` varchar(100) NOT NULL DEFAULT '' COMMENT '配置名称',
+  `api_base` varchar(255) NOT NULL DEFAULT '' COMMENT 'OpenAI兼容接口基址，如 https://api.deepseek.com',
+  `api_key` varchar(500) NOT NULL DEFAULT '' COMMENT 'API Key（不回传前端）',
+  `models` text COMMENT '可用模型 JSON 数组，如 ["deepseek-chat"]',
+  `default_model` varchar(255) NOT NULL DEFAULT '' COMMENT '默认模型',
+  `is_default` tinyint NOT NULL DEFAULT 0 COMMENT '是否平台默认（Playground/OCR优先使用）',
+  `status` tinyint NOT NULL DEFAULT 1 COMMENT '0-禁用 1-启用',
+  `remark` varchar(255) NOT NULL DEFAULT '',
+  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  `delete_time` datetime DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  KEY `idx_type_status` (`provider_type`, `status`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='平台AI服务商配置';