perf(cost-center): 商品页跳过无关 affiliate 聚合并补部分索引

apps/backend/src/services/cost-center/product-catalog-service.ts

@@ -106,6 +106,14 @@ export async function listAdminProducts(payload: JsonObject = {}) {
     baseClauses.push(productSourceFilterSql(baseParams.length))
   }
 
+  // 人工/接单平台商品不需要 affiliate 任务统计：跳过 30 天 fulfillment_tasks 聚合。
+  // 只有「全部」和「自动发货」Tab 才需要这条聚合，避免小库 IO 被无关数据拖慢。
+  const needsAffiliateTaskStats = !source || source === 'affiliate_dash'
+  const affiliateTaskJoinSql = needsAffiliateTaskStats ? AFFILIATE_TASK_AGG_JOIN : ''
+  const affiliateColumnsSql = needsAffiliateTaskStats
+    ? 'COALESCE(aff.task_count, 0) AS affiliate_task_count, aff.last_fulfilled_at AS affiliate_last_fulfilled_at'
+    : '0::int AS affiliate_task_count, NULL::timestamptz AS affiliate_last_fulfilled_at'
+
   const categoryId = normalizeCategoryFilter(payload.categoryId ?? payload.category_id)
   const rootCategoryId = normalizeCategoryFilter(payload.rootCategoryId ?? payload.root_category_id)
   const listParams = [...baseParams]
@@ -196,11 +204,10 @@ export async function listAdminProducts(payload: JsonObject = {}) {
               LIMIT 1
             )
           ) AS active_cost_effective_from,
-          COALESCE(aff.task_count, 0) AS affiliate_task_count,
-          aff.last_fulfilled_at AS affiliate_last_fulfilled_at
+          ${affiliateColumnsSql}
         FROM product_catalog p
         ${PRODUCT_CATEGORY_JOINS}
-        ${AFFILIATE_TASK_AGG_JOIN}
+        ${affiliateTaskJoinSql}
         ${where}
         ORDER BY
           p.status ASC,