Support up to 3 strategy slots on one host with auto ports.

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/lib/install.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# deploy/lib/install.sh — 一键部署策略机
+# deploy/lib/install.sh — 一键部署策略机（支持槽位 1/2/3）
 set -e
 set -u
 if [ -n "${BASH_VERSION:-}" ]; then
@@ -13,10 +13,12 @@ source "${LIB_DIR}/common.sh"
 run_pipeline() {
   local root="$1"
   REPO_ROOT="${root}"
-  step "构建并启动策略机 (pull_and_restart.sh)"
+  INSTALL_ROOT="${root}"
+  apply_slot_for_root "${root}"
+  step "构建并启动策略机 (pull_and_restart.sh) slot=${INSTANCE_SLOT}"
   bash "${REPO_ROOT}/deploy/pull_and_restart.sh"
   pm2_save_startup
-  verify_health || true
+  verify_health "${API_PORT}" || true
   print_post_install_guide
 }
 
@@ -24,7 +26,8 @@ install_fresh() {
   require_root
   step "一键部署策略机 — 环境检测与依赖"
   ensure_system_deps
-  step "克隆仓库 → ${INSTALL_ROOT}"
+  assert_port_free_for_install "${API_PORT}" "${PM2_APP_NAME}"
+  step "克隆仓库 → ${INSTALL_ROOT}（槽位 ${INSTANCE_SLOT} / :${API_PORT}）"
   if [[ -d "${INSTALL_ROOT}" ]]; then
     die "目录已存在: ${INSTALL_ROOT}，请先卸载或选修复"
   fi
@@ -40,13 +43,13 @@ install_repair() {
   if ! REPO_ROOT="$(resolve_repo_root)"; then
     die "未找到安装目录 ${INSTALL_ROOT}"
   fi
-  step "修复环境(保留 .env 与数据库)"
+  step "修复环境(保留 .env 与数据库) slot=${INSTANCE_SLOT}"
   run_pipeline "${REPO_ROOT}"
 }
 
 handle_existing() {
   echo ""
-  echo "检测到已部署: ${INSTALL_ROOT}"
+  echo "检测到已部署: ${INSTALL_ROOT}（槽位 ${INSTANCE_SLOT}）"
   echo "  a) 取消"
   echo "  b) 修复/重装环境(保留 .env 与 SQLite)"
   local choice=""
@@ -59,6 +62,15 @@ handle_existing() {
 
 main_install() {
   require_root
+  # manage.sh 已 prompt；直接调用时按 INSTANCE_SLOT / INSTALL_ROOT 对齐
+  if [[ "${INSTALL_ROOT}" == "/opt/eth_hedge_sim_2" ]]; then
+    resolve_slot 2
+  elif [[ "${INSTALL_ROOT}" == "/opt/eth_hedge_sim_3" ]]; then
+    resolve_slot 3
+  else
+    resolve_slot "${INSTANCE_SLOT:-1}"
+  fi
+
   if repo_ready "${INSTALL_ROOT}"; then
     handle_existing
   else