[biast12]

Description

Replaces the hand-written markdown parser with a port of Discord's web-client markdown parser, so previews, the ticket view and transcripts render like Discord. Notification emails use a Go port of it with Text Display rules. Fixes > -# :warning: **Make sure your Discord DMs are open.** showing a literal -# :warning: inside the quote.

• Lists render, and quotes can hold subtext, headings, lists and code blocks.
• :shortcode: emoji render via the new @emoji-platform-data/discord dependency (lazy-loaded, ~325 kB chunk). (frontend only)
• Each surface follows Discord's rules, e.g. embed titles no longer render headings, user/role mentions or masked links.
• Masked links get Discord's anti-spoofing checks (e.g. [https://a.com](https://b.com) stays text); mailto:, tel: and sms: links work.
• Each timestamp style gets its own format, and slash-command mentions and <id:…> links render. In the dashboard, relative times update live and jumbo emoji and ansi colours show.
• Markup uses Discord's sizes and spacing; editors, the ticket view and transcripts show the server's channel and role names.

Type of Change

• Bug fix
• New feature
• Breaking change

Testing

• Try to break the markdown, both in the frontend and in an email

Checklist

• My code follows the style of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works