Mermaid code block truncated on homepage causes parse error

[tyroneyeh]

Description

When a comment containing a Mermaid diagram is truncated on the homepage (max 200 chars),
the code block may not be closed properly, causing a "Parse error" in the rendered diagram.
Additionally, Mermaid pipelines using '|' are sometimes truncated incorrectly.

https://demo.gitea.com/tyroneyeh/TestRepo/issues/1

Gitea Version

1.25.4

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

Home:

Git Version

No response

Operating System

linux

How are you running Gitea?

command-line

Database

PostgreSQL

[silverwind]

Yes, the code that does this truncation needs to be smarter to not truncate in the middle of a rendered block. Likely the same problem applies to math blocks.