KaTeX fonts are not rendered by Vite (not in Vite server.fs.allow[])

[exhumea]

Describe the bug
KaTeX fonts are not rendered by Vite for slides in a sub-directory (not in Vite server.fs.allow[]).

> slidev export --format pdf SUBDIR/slides.md

  ●■▲
  Slidev  v0.48.9 

  theme       slidev-theme-frankfurt
  css engine  unocss
  entry       SUBDIR/slides.md
  ■ rendering...The request url "./node_modules/katex/dist/fonts/KaTeX_Main-Regular.woff2" is outside of Vite serving allow list.

- ./SUBDIR
- ./node_modules/@slidev/cli
- ./node_modules/@slidev/client
- ./node_modules/slidev-theme-frankfurt
- ./node_modules/vite/dist/client

Refer to docs https://vitejs.dev/config/server-options.html#server-fs-allow for configurations and more details.

The request url "./node_modules/katex/dist/fonts/KaTeX_Main-Regular.woff2" is outside of Vite serving allow list.
The request url "./node_modules/katex/dist/fonts/KaTeX_Math-Italic.woff" is outside of Vite serving allow list.
[...]

  ✓ exported to ./slides-export.pdf

To Reproduce

1. npm init slidev@0.48.9
2. Add a $X = Y$ TeX formula somewhere
3. Move slides.md (and any sub-pages, snippets) in a sub-directory
4. npm run export -- SUBDIR/slides.md

Versions:

• OS: Debian GNU/Linux 12 (bookworm)
• Slidev version: 0.48.9