- Add _ensure_list_spacing() to handle lists without blank lines before them
- Modify _md_to_html() to preprocess markdown content via stdin
- Add automated test suite (scripts/tests/test_list_rendering.py)
- Fix: Lists without preceding blank lines now render correctly
- Original markdown files remain unmodified (preprocessing in memory only)
Root cause: Pandoc requires blank lines before lists per CommonMark spec.
Without preprocessing, lists following paragraphs render as plain text.
Tested scenarios:
✅ Lists with blank lines (normal case)
✅ Lists without blank lines (critical fix)
✅ Ordered lists without blank lines
✅ Original file integrity preserved
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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