-- 009: 为 market_apps 增加 platform 列（Agent 接入平台 dify/n8n/coze）
-- 幂等：列已存在则跳过
SET @col = (SELECT COUNT(*) FROM information_schema.columns
            WHERE table_schema = DATABASE() AND table_name = 'market_apps' AND column_name = 'platform');
SET @sql = IF(@col = 0,
    'ALTER TABLE market_apps ADD COLUMN platform VARCHAR(20) NULL COMMENT \'Agent 接入平台：dify/n8n/coze\'',
    'SELECT 1');
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;