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9c77a87908 fix(markup): use installed math fonts for MathML in Chromium (#39491 ) (#39547 )

Backport #39491 by @Copilot

On Linux and ChromeOS, Chromium resolves the `math` font family to Latin
Modern Math, which neither installs, so MathML renders with a text font
and brackets and large operators don't stretch, see
https://issues.chromium.org/issues/40069293. The new `--fonts-math`
variable keeps `math` first, so browsers that always resolve it keep
their font. Only Chromium falls through to the math fonts Linux and
ChromeOS install by default:

- `STIX Two Math`: Fedora, and `fonts-stix` on Ubuntu 26.04
- `DejaVu Math TeX Gyre`: Debian 13 and openSUSE
- `Noto Sans Math`: Fedora and ChromeOS, last because Debian and Ubuntu
ship an older version without a `MATH` table

Math fonts also have smaller x-heights than UI fonts, so MathML rendered
smaller than KaTeX and the surrounding text in every browser, see
https://github.com/w3c/mathml-core/issues/41. `font-size-adjust:
ex-height 0.52` scales whichever math font is used to KaTeX's x-height.
KaTeX output is unchanged.

Fixes: https://github.com/go-gitea/gitea/issues/39489

![before and
after](https://github.com/user-attachments/assets/8319c9a9-363f-4d14-ad3d-3d2282bd0df9)

Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: bircni <75789103+bircni@users.noreply.github.com>
Co-authored-by: silverwind <me@silverwind.io>

2026-10-03 04:34:26 +08:00

editor

enhance(web): hide attachment dropzone on preview tab in combo editor (#39204 )

2026-09-03 23:32:11 +00:00

features

enhance(web): show attachment URL and UUID in dropzone preview (#39203 )

2026-09-05 10:01:27 +00:00

markup

enhance: update mermaid to v12 (#39331 )

2026-09-17 23:28:51 +00:00

modules

feat(actions): add build queue view (#38585 )