jcoffey-dev
73a1bad29f
`htmlBody` is a derived list, not a filter: RFC 8621 §4.1.4 gives a message with no HTML alternative one anyway, holding the text/plain part. Testing `Boolean(htmlRaw)` therefore answered "this is HTML" for every plain-text mail, sending it to HtmlBody and `.ihm-email-root`, which is `white-space: normal` and collapses every line break. Hard-wrapped mail arrived as a single paragraph with the signature and the quoted reply run into the prose. Confirmed live against Stalwart 0.16.21 (2026-09-10): a plain-text message comes back with `htmlBody` and `textBody` naming the same part, typed text/plain, while a real multipart/alternative names two different parts. `type` was already in BODY_PROPS; nothing looked at it. TextBody was written for exactly these messages and was simply unreachable, so this also restores what it does -- pre-wrap, quote-depth colouring and the collapsible quoted block, none of which had ever fired on plain-text mail.