The composer is a constrained contenteditable (plain-text paste,
toolbar formatting, upload chips for images/attachments) serialized to
a Markdown subset by richtext.js — the wire format is text and the
server re-renders it, so no user markup ever reaches a page. Uploads go
to /_contact/files with the session token (admins share the component
via /_api/files). ContactPanel shows the thread pushed live over the
activity socket: pagerite.js lazy-loads the bundle on trigger clicks,
routes socket pushes to it, re-registers the session token on every
reconnect (the resync), and dots trigger buttons on unread replies.
LeoVasanko
eea89032a2