环境菜单标题显示已识别的环境名

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

install.sh

@@ -188,7 +188,9 @@ pick_env() {
       2) opts[2]="release(默认) 生产环境       HTTPS / RSA 密钥" ;;
     esac
   fi
-  select_menu "选择环境" "$default_index" "${opts[@]}"
+  local menu_title="选择环境"
+  [[ -n "$env" ]] && menu_title="选择环境  （已识别: ${env}）"
+  select_menu "$menu_title" "$default_index" "${opts[@]}"
   case "$SELECTED_INDEX" in
     0) SELECTED_ENV="dev" ;;
     1) SELECTED_ENV="main" ;;