All bot messages now built as plain text and converted via _text_to_html()
which escapes content and converts newlines to <br>. This avoids raw HTML
tags appearing literally in Odoo 18 Discuss.
- _describe_zip: returns plain str (no Markup/HTML)
- _post_file_clarification: builds plain text, posts via _text_to_html()
- _find_pending_attachments: strip HTML before phrase matching
- _text_to_html: new helper shared by clarification and agent replies
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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