Add single-exchange instance-only deploy menu options.

Manage menu 4/5/6 install OKX/Binance/Gate Flask only without hub or agents; reuse setup_env --only and narrowed PM2 verify.

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

deploy/pm2_start_all.sh

@@ -2,6 +2,9 @@
 # 按推荐顺序启动三所 Flask + 中控 hub/三 agent(PM2).
 # 用法(仓库根或任意目录):
 #   bash deploy/pm2_start_all.sh
+#   bash deploy/pm2_start_all.sh --only okx
+#   bash deploy/pm2_start_all.sh --only binance
+#   bash deploy/pm2_start_all.sh --only gate
 #
 # 与 deploy/setup_env.sh 独立:setup_env 只建 venv;本脚本负责 PM2 启动.
 set -e
@@ -12,6 +15,26 @@ fi
 
 DEPLOY_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 REPO_ROOT="$(cd "${DEPLOY_DIR}/.." && pwd)"
+# shellcheck source=lib/common.sh
+source "${DEPLOY_DIR}/lib/common.sh"
+
+ONLY="all"
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --only)
+      ONLY="${2:-all}"
+      shift 2
+      ;;
+    -h|--help)
+      sed -n '2,10p' "$0" | sed 's/^# \?//'
+      exit 0
+      ;;
+    *)
+      echo "未知参数: $1" >&2
+      exit 1
+      ;;
+  esac
+done
 
 start_one() {
   local dir_name="$1"
@@ -22,7 +45,14 @@ start_one() {
     return 0
   fi
   echo "==> pm2 start ${dir_name}"
-  (cd "${proj}" && pm2 start ecosystem.config.cjs)
+  # 已存在则 restart,避免重复 start 导致 set -e 退出
+  if (cd "${proj}" && pm2 start ecosystem.config.cjs); then
+    return 0
+  fi
+  echo "  (已存在,改为 restart)"
+  (cd "${proj}" && pm2 startOrReload ecosystem.config.cjs --update-env) \
+    || (cd "${proj}" && pm2 reload ecosystem.config.cjs --update-env) \
+    || true
 }
 
 if ! command -v pm2 >/dev/null 2>&1; then
@@ -30,10 +60,20 @@ if ! command -v pm2 >/dev/null 2>&1; then
   exit 1
 fi
 
-start_one crypto_monitor_binance
-start_one crypto_monitor_gate
-start_one crypto_monitor_okx
-start_one manual_trading_hub
+if [[ "${ONLY}" == "all" ]]; then
+  start_one crypto_monitor_binance
+  start_one crypto_monitor_gate
+  start_one crypto_monitor_okx
+  start_one manual_trading_hub
+else
+  ex_key="$(normalize_exchange_key "${ONLY}" || true)"
+  if [[ -z "${ex_key}" ]]; then
+    echo "未知 --only 值: ${ONLY} (期望 okx|binance|gate|all)" >&2
+    exit 1
+  fi
+  dir_name="$(exchange_dir "${ex_key}")"
+  start_one "${dir_name}"
+fi
 
 pm2 save 2>/dev/null || true
 echo ""