Equation pipeline creates tracked changes: TrackRevisions not disabled before macro execution

[GLY2024]

Problem

When converting MathType OLE equations via the equation pipeline (03run_equation_pipeline.py), both step 2 (OLE → MathML) and step 3 (MathML → OMML) run Word macros without disabling TrackRevisions. This causes the equation conversion to be recorded as tracked changes (deletions of old OLE/MathML + insertions of new MathML/OMML).

When the resulting .docx is subsequently converted to markdown via pandoc --track-changes=all, the deleted MathML/MathType markup appears as raw garbled text in the output — thousands of lines of <math xmlns=...>, <semantics>, MathType@MTEF@5@5@+=... etc.

Reproduction

# 1. Convert a docx with MathType OLE equations
python scripts/math_ops/03run_equation_pipeline.py input.docx --out clean.docx

# 2. Convert to markdown with tracked changes
pandoc --track-changes=all clean.docx -o output.md

# 3. output.md contains raw MathML as deletion spans:
# [**\<math xmlns=\'http://www.w3.org/1998/Math/MathML\'\>**]{.deletion author="..." ...}
# [**\<semantics\>**]{.deletion author="..." ...}
# ... (thousands of lines per equation)

Root Cause

In 01convert_equation_format_OLE_to_MathML.ps1 (line ~263) and 02convert_equation_format_MathML_to_OMML.ps1 (line ~326), $word.Run(...) is called while $doc.TrackRevisions may be $true, so Word records every equation replacement as a tracked change.

Fix

Disable TrackRevisions before macro execution and restore afterward, in both scripts:

01convert_equation_format_OLE_to_MathML.ps1 (before $word.Run):

$savedTrackRevisions = $doc.TrackRevisions
$doc.TrackRevisions = $false

Write-NoticeMessage "开始执行宏：$MacroName"
Write-NoticeMessage "请在 Word 弹窗中手动确认。"
[void]$word.Run($MacroName)

$doc.TrackRevisions = $savedTrackRevisions

02convert_equation_format_MathML_to_OMML.ps1 (before $word.Run):

$savedTrackRevisions = $doc.TrackRevisions
$doc.TrackRevisions = $false

Write-NoticeMessage "正在执行宏：$macroQualifiedName"
try {
    $null = $word.Run($macroQualifiedName)
}
catch {
    $detail = $_.Exception.Message
    throw "执行宏失败：$detail`n`n$((Get-InstallHint -Template $TemplateName).Trim())"
}

$doc.TrackRevisions = $savedTrackRevisions

This preserves all human-authored tracked changes in the document while preventing equation-conversion artifacts.