Rich text

MarkdownComposer turns typed Markdown into formatted_body with Markdig (CommonMark, strikethrough, autolinks, raw HTML disabled), unwraps a single paragraph like Element, and turns completed nicks into matrix.to mention pills; text without formatting or mentions is sent without HTML. HtmlText renders incoming HTML with AngleSharp into terminal text: blocks, lists, quotes, code, links with addresses, mention names, hidden spoilers, and no mx-reply fallback.