Thank you for the thoughtful comment and advice! The lightweight binary you mentioned is likely emacsclient, which is indeed a good way to use a running Emacs process as a quick editor.

You are right that if elecxzy were just for editing a single file, it might not offer much over a standard Notepad. However, the real value I wanted to achieve is the ability to view, edit, and integrate multiple sources using muscle memory, without touching the mouse.

While it runs as a simple standalone window, it supports Emacs window splitting commands like C-x 2, C-x 3, and C-x 1.

Here is a quick video I posted a while ago (the text is in Japanese, but you can see the window splitting in action): https://x.com/elecxzy/status/2020370174818631769

As for contributing to the upstream Emacs to fix CJK issues, I agree that it would be a more impactful approach for the community. But I really appreciate your advice about doing software for myself. I will continue to work on this project for my own use and enjoyment. Thank you for the great advice!