[Repo Assist] Fix #803: do not copy _menu_template.html and _menu-item_template.html to output

[github-actions]

🤖 This is an automated pull request from Repo Assist.

Closes #803

Summary

When a project uses custom menu templates (_menu_template.html and/or _menu-item_template.html), these files were being incorrectly copied to the output directory as if they were regular content files.

Root Cause

In BuildCommand.fs, both prepFile and processFile filter out internal template files using:

not (inputFileName.StartsWith("_template", StringComparison.Ordinal))

This correctly excludes _template.html, _template.tex, etc. — but _menu_template.html and _menu-item_template.html start with _menu, not _template, so they slipped through and were copied to output.

Fix

Added an additional guard in both prepFile and processFile:

&& not (
    name.StartsWith("_menu", StringComparison.Ordinal)
    && name.EndsWith("_template.html", StringComparison.OrdinalIgnoreCase)
)

This pattern covers the two known cases (_menu_template.html, _menu-item_template.html) and any future _menu-*_template.html variants, with minimal risk of false positives.

Test Status

• ✅ Build succeeded (0 errors, 4 pre-existing warnings)
• ✅ 346 tests passed, 6 skipped, 0 failed across all test suites

Generated by Repo Assist

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[github-actions]

✅ Pull request created: #995