feat(mcp): MCP 密钥管理后台（CURD 重组 Base/App，密钥仅创建时明文展示）

database/migrations/20260816203001_system_mcp_key.php

@@ -0,0 +1,33 @@
+<?php
+
+use think\migration\Migrator;
+
+class SystemMcpKey extends Migrator
+{
+    /**
+     * MCP密钥表.
+     *
+     * 明文密钥永不出现在本表：
+     * - key 存 SHA-256 哈希（char 64，唯一索引）
+     * - key_prefix 存明文前 16 位（char 16，展示用）
+     */
+    public function change()
+    {
+        $table = $this->table('system_mcp_key')
+            ->setComment('MCP密钥表')
+            ->addColumn('title', 'char', ['limit' => 50, 'null' => true, 'comment' => '密钥名称'])
+            ->addColumn('key', 'char', ['limit' => 64, 'null' => true, 'comment' => '密钥SHA-256哈希'])
+            ->addColumn('key_prefix', 'char', ['limit' => 16, 'null' => true, 'default' => '', 'comment' => '密钥前缀(展示用)'])
+            ->addColumn('bind_admin_id', 'biginteger', ['limit' => 11, 'null' => true, 'signed' => false, 'comment' => '绑定创建者ID'])
+            ->addColumn('status', 'integer', ['limit' => 11, 'null' => true, 'default' => 1, 'comment' => '状态 {radio} (0:禁用,1:启用)'])
+            ->addColumn('remark', 'char', ['limit' => 255, 'null' => true, 'default' => '', 'comment' => ''])
+            ->addColumn('use_num', 'biginteger', ['limit' => 11, 'null' => true, 'default' => 0, 'signed' => false, 'comment' => '调用次数'])
+            ->addColumn('last_use_time', 'integer', ['limit' => 11, 'null' => true, 'default' => 0, 'signed' => false, 'comment' => '最后使用时间'])
+            ->addColumn('create_time', 'integer', ['limit' => 11, 'null' => true, 'default' => 0, 'signed' => false, 'comment' => '创建时间'])
+            ->addColumn('update_time', 'integer', ['limit' => 11, 'null' => true, 'default' => 0, 'signed' => false, 'comment' => '更新时间'])
+            ->addColumn('delete_time', 'integer', ['limit' => 11, 'null' => true, 'default' => 0, 'signed' => false, 'comment' => '删除时间'])
+            ->addIndex(['key'], ['unique' => true, 'name' => 'key'])
+            ->addIndex(['delete_time'], ['name' => 'delete_time'])
+            ->create();
+    }
+}

database/migrations/20260816203002_system_mcp_key_node.php

@@ -0,0 +1,21 @@
+<?php
+
+use think\migration\Migrator;
+
+class SystemMcpKeyNode extends Migrator
+{
+    /**
+     * MCP密钥与节点关系表.
+     *
+     * 纯关系表：无任何时间戳字段。
+     */
+    public function change()
+    {
+        $table = $this->table('system_mcp_key_node')
+            ->setComment('MCP密钥与节点关系表')
+            ->addColumn('key_id', 'biginteger', ['limit' => 11, 'null' => true, 'signed' => false, 'comment' => '密钥ID'])
+            ->addColumn('node', 'char', ['limit' => 100, 'null' => true, 'default' => '', 'comment' => ''])
+            ->addIndex(['key_id'], ['name' => 'key_id'])
+            ->create();
+    }
+}

database/migrations/20260816203003_system_mcp_log.php

@@ -0,0 +1,25 @@
+<?php
+
+use think\migration\Migrator;
+
+class SystemMcpLog extends Migrator
+{
+    /**
+     * MCP调用日志表.
+     *
+     * 仅 create_time（写入后不变），无 update_time / delete_time。
+     */
+    public function change()
+    {
+        $table = $this->table('system_mcp_log')
+            ->setComment('MCP调用日志表')
+            ->addColumn('key_id', 'biginteger', ['limit' => 11, 'null' => true, 'signed' => false, 'comment' => '密钥ID'])
+            ->addColumn('node', 'char', ['limit' => 100, 'null' => true, 'comment' => '调用节点'])
+            ->addColumn('arguments', 'text', ['null' => true, 'comment' => '参数摘要JSON'])
+            ->addColumn('is_success', 'integer', ['limit' => 1, 'null' => true, 'default' => 1, 'comment' => '是否成功:0=失败,1=成功'])
+            ->addColumn('cost_ms', 'integer', ['limit' => 11, 'null' => true, 'default' => 0, 'comment' => '耗时毫秒'])
+            ->addColumn('create_time', 'integer', ['limit' => 11, 'null' => true, 'default' => 0, 'signed' => false, 'comment' => '创建时间'])
+            ->addIndex(['key_id'], ['name' => 'key_id'])
+            ->create();
+    }
+}