text-editor saves & as &, so full-text search no longer finds the note #3439

Initial Checklist

• I understand this is a bug report and questions should be posted in the Discussions
• I searched the issues and discussions of opencloud-eu/web, opencloud-eu/opencloud and opencloud-eu/web-extensions and found nothing about this

Bug Description

When the text editor saves Markdown, it rewrites plain characters in the text. & becomes &, < becomes < and > becomes >. *, _, ~, [, ] and \ get a backslash. The note looks the same, but the file text changes. Full-text search reads the file text, so after one save the note is no longer found by words with these characters. We confirmed this for & on our instance.

The rewrite comes from Tiptap's Markdown output (entity encoding added in ueberdosis/tiptap#7565). Markdown does not need it for plain text like Q&A or a < b.

Reproduction Steps

1. Create test.md with the line Searchtestalpha&Searchtestbeta.
2. Search for Searchtestalpha&Searchtestbeta. The note is found.
3. Open test.md in the text editor, change any other word, save. The line is now Searchtestalpha&Searchtestbeta.
4. Search again.

Expected Outcome

The note is still found after saving.

Actual Outcome

No result.

Setup

OpenCloud 8.0.1 (Web 8.0.0), full-text search with Tika. Related: #3434, #3435