Desktop with Obsidian integration reformats markdown and strips file properties and other key formatting

**Describe the bug**
Harper Desktop with Obsidian as an integrated application removes YAML file properties and other document formatting, such as double carriage returns. Not tested exhasutively, but I note that if the error is already formatted - for example *ERRROR* then Harper also strips out the formating around the error.

**To Reproduce**
Install Harper Desktop
Add Obsidian as an integration
Write markdown with errors, accept the correction suggested by Harper

**Expected behavior**
The correction should be made without other reformating of the document.

**Screenshots**
Before accepting the correction:

After accepting the correction:

**Platform**
Mac OS X M4 Mini Tahoe 26.6.2, current version of Obsidian etc.

**Additional context**
I appreciate that there's an Obsidian plugin (which works as expected), however I want to share that dictionary with a system-wide dictionary to avoid duplications. I have a very extensive specialised dictionary and want to switch from languagetool to Harper.

Claude tells me that this is a consequence of Obsidian being Electron under the hood.

This is peripherally linked to a request a couple of months ago for the [Obsidian plugin to use an external dictionary](https://github.com/Automattic/harper/issues/3808#issue-4863069577).

Reproduce the issue in Harper Desktop with Obsidian using a document containing YAML properties, blank lines, and formatted text, then compare the document before and after accepting a correction. Trace the Obsidian integration path that applies corrections; done means only the suggested correction changes while properties, spacing, and existing Markdown formatting remain intact.

Written by the indexing model from the issue text.