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chore(docs): tips for installing CN fonts (#14189)

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### What problem does this PR solve?
Add tips for installing Chinse fonts under code sandbox. Otherwise,
`matplotlib `won't render Chinese correctly.

<img width="2082" height="1186" alt="sales_analysis"
src="https://github.com/user-attachments/assets/57e675ab-1e92-4662-9aeb-ad72a6121eb5"
/>



### Type of change

- [x] Documentation Update
This commit is contained in:
LeonTung
2026-04-20 12:11:23 +08:00
committed by GitHub
parent 0f806dc3ca
commit f554f6ae85
3 changed files with 21 additions and 0 deletions
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## RAGFlow sandbox – matplotlib defaults
## Only overrides are listed; all other settings use matplotlib built-in defaults.
# Prefer CJK-capable fonts so Chinese / Japanese / Korean text renders correctly.
# matplotlib silently skips fonts that are not installed, falling back to the
# next entry in the list, so this is safe even without any CJK font package.
font.family: sans-serif
font.sans-serif: Noto Sans CJK SC, Noto Sans CJK TC, Noto Sans CJK JP, Noto Sans CJK KR, Source Han Sans SC, Source Han Sans CN, WenQuanYi Zen Hei, Microsoft YaHei, SimHei, PingFang SC, Heiti SC, STHeiti, Arial Unicode MS, DejaVu Sans, Bitstream Vera Sans, Computer Modern Sans Serif, Lucida Grande, Verdana, Geneva, Lucid, Arial, Helvetica, Avant Garde, sans-serif
# Use ASCII hyphen-minus for the minus sign so it renders correctly with any font.
axes.unicode_minus: False