SAN-157 removed the html2pdf client library. The PDF export code added
in the original PR commit referenced the deleted library and would fail
at runtime. Replace the html2pdf-based _downloadSelectedEmailPdf with a
browser Print / save PDF workflow using a sandboxed iframe and
window.print(), matching the established pattern in document.js and
compare/index.js.
Changes:
- Replace _loadEmailHtml2Pdf and _downloadSelectedEmailPdf with
_printSelectedEmails using a sandboxed iframe + contentWindow.print()
- Update menu label from 'PDF' to 'Print / save PDF'
- Add 512 MiB total size cap to /messages-download-bulk to prevent
unbounded memory growth when exporting many large messages
- Update test assertions to verify the browser print pattern and
confirm html2pdf is not referenced
- Add regression tests for size cap, selection count validation,
non-numeric UID rejection, and partial batch failure accounting
Alexandre Teixeira
8eaf742b43