Display scale: session detection via Hyprland env, executable recovery hint

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

bin/omarchy-cn-display-scale

@@ -38,9 +38,9 @@ fi
 
 echo "Monitor scale: $preset, GDK scale: $gdk"
 
-if ! command -v hyprctl > /dev/null 2>&1; then
+if [[ -z ${HYPRLAND_INSTANCE_SIGNATURE:-} ]]; then
   rm -f "$backup"
-  echo "Hyprland 未运行，重登录后生效"
+  echo "当前不在 Hyprland 会话内，重登录后生效"
 elif ! hyprctl reload > /dev/null 2>&1; then
   mv "$backup" "$monitors"
   echo "hyprctl reload 失败，已恢复原配置" >&2
@@ -56,6 +56,6 @@ elif [[ -t 0 ]]; then
     echo "已恢复原缩放"
   fi
 else
-  omarchy-notification-send "OmarchyCN" "缩放已改为 $preset；如异常运行 omarchycn display scale 恢复" 2> /dev/null || true
-  echo "无终端交互：已应用，备份保留在 $backup，可用 mv 恢复"
+  omarchy-notification-send "OmarchyCN" "缩放已改为 $preset；如异常执行: mv $backup $monitors && hyprctl reload" 2> /dev/null || true
+  echo "无终端交互：已应用；恢复命令: mv $backup $monitors && hyprctl reload"
 fi