Turns the SDK from hooks-only into a real UI SDK: <Messenger> (conversation
list + open thread + composer), plus <ConversationList> and <Thread>, all
driven by the existing useConversations/useMessages hooks over the injected
adapter — zero transport imports (boundary intact).
- themeable via --miu-* CSS variables; default theme ships as ./styles.css
- optimistic send, typing indicator, seen ticks, reactions display, unread badges
- render smoke tests (jsdom + MockAdapter): mounts, auto-selects first thread,
sends a message, switches threads (3 tests) — 48 total green
- tsup: css bundled to dist/styles.css; dts scoped to TS entries
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
maaz519