diff --git a/.gitea/workflows/vps-deploy.yml b/.gitea/workflows/vps-deploy.yml
index 1784a24..bfdb734 100644
--- a/.gitea/workflows/vps-deploy.yml
+++ b/.gitea/workflows/vps-deploy.yml
@@ -66,12 +66,21 @@ jobs:
           set -e
           ssh 49.232.102.198 'C:\Python310\python.exe -X utf8 C:\sanguo_vnpy_v2\scripts\nas_sync\vps_update_dist.py' | tee /tmp/dist_swap.log
           grep -q DIST_UPDATE_DONE /tmp/dist_swap.log
-          # 停 API → 等端口彻底释放(旧实例被杀后端口有滞留, 立即重启会 10048 静默崩)
+          # 停 API → 僵尸端口守卫 → 等端口彻底释放(否则 fail) → 重启
+          # 2026-08-16 实录: /end 杀不掉 uvicorn reload 孤儿子进程, 旧进程跨两轮
+          # 部署占 8000, 新实例静默抢不到端口, /docs 200 验的还是旧代码 → 500 旧 bug 重现
           ssh 49.232.102.198 'schtasks /end /tn sanguo-api' || true
+          ZPID=$(ssh 49.232.102.198 'netstat -ano -p tcp' | tr -d '\r' | grep ':8000' | grep -i LISTENING | awk '{print $NF}' | sort -u | head -1)
+          if [ -n "$ZPID" ]; then
+            echo "僵尸 API 进程 PID=$ZPID 仍占 8000, 强杀"
+            ssh 49.232.102.198 "taskkill /F /T /PID $ZPID" || true
+          fi
+          PORT_FREED=0
           for i in $(seq 1 30); do
-            ssh 49.232.102.198 'netstat -ano -p tcp' | tr -d '\r' | grep -q ':8000.*LISTEN' || { echo "port freed after $((i*2))s"; break; }
+            ssh 49.232.102.198 'netstat -ano -p tcp' | tr -d '\r' | grep -q ':8000.*LISTEN' || { echo "port freed after $((i*2))s"; PORT_FREED=1; break; }
             sleep 2
           done
+          if [ "$PORT_FREED" != "1" ]; then echo "❌ 端口 8000 未释放, 强杀后重启会 10048, 终止"; exit 1; fi
           ssh 49.232.102.198 'schtasks /run /tn sanguo-api'
           # 等新实例监听 + /docs 可用(VPS 启动需数分钟, 上限 10 分钟)
           for i in $(seq 1 60); do
diff --git a/frontend/src/views/backtest/PortfolioBacktest.vue b/frontend/src/views/backtest/PortfolioBacktest.vue
index 4c5d6c2..afa5d8a 100644
--- a/frontend/src/views/backtest/PortfolioBacktest.vue
+++ b/frontend/src/views/backtest/PortfolioBacktest.vue
@@ -436,7 +436,8 @@ async function prefillFromInstance(instId: number): Promise<void> {
     const p = inst.params || {}
     if (typeof p.max_pool === 'number') form.max_pool = p.max_pool
     if (typeof p.benchmark === 'string') form.benchmark = p.benchmark
-    if (inst.symbol_or_pool && inst.symbol_or_pool !== '') form.pool = inst.symbol_or_pool
+    // #89 标的池不预填:#86a 定稿「实例不选标的,发起时定」——老实例存的
+    // symbol_or_pool(all 等)不该悄悄改用户的池选择
   } catch {
     /* 预填失败走默认 */
   }