Addresses review feedback:
- Fix test file references (test_psa_export.py, not test_export.py)
- Use _make_session helper instead of nonexistent fixtures
- Format-aware truncation markers (markdown/html/text/psa)
- No placeholder leak: empty fields stay blank, not [Edit in preview]
- Markdown table escaping for pipe/newline chars
- Summary toggle error handling with checkbox revert
- Phase A prerequisite called out explicitly
- Document edit-reset behavior on summary toggle
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
c5adab1685