guifontwide fonts do not get larger/smaller when guifont does

Steps to reproduce

1. Install and set different fonts for guifont and guifontwide
2. Type in English and Korean: 가나다 ABC
3. Make text larger/smaller

Actual results: only the English text gets larger/smaller; the Korean text stays the same size.

Expected behaviour

Expected results: all text would get larger/smaller

Version of MacVim

r182

MacVim installation method

Downloaded from GitHub release

Environment

macOS version: Sequoia 15.7.3
Mac: MBA M2

Logs and stack traces

Vim and MacVim configuration where issue is reproducable

set guifont=DejaVuSansMono:h20
set guifontwide=D2Coding:h20

Can be reproduced with different guifontwide fonts; one easy-to-get monospaced Korean font is D2Coding-Ver1.3.2-20180524.ttc from https://github.com/naver/d2codingfont/releases/tag/VER1.3.2

How was MacVim launched?

• by launching MacVim.app in macOS (by using the Dock, Spotlight, or the open command)
• by running mvim/gvim in the terminal

Issue has been tested with clean configuration

• by running mvim --clean (or gvim, supplied by MacVim distribution). You can also use the File → "New Clean Window" menu item within MacVim.
• by running vim --clean (in terminal, supplied by MacVim distribution)
• by running vim --clean (in terminal, other suppliers, e.g. /usr/bin/vim)

mvim --clean、示されている guifont と guifontwide の設定、および韓国語と英語が混在したテキストを使用して、macOS 上の MacVim r182 で問題を再現します。両方のフォントについてリサイズ時の挙動を比較します。韓国語のテキストが英語のテキストと同時にサイズ変更されれば完了です。